diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-02 12:59:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-02 12:59:12 -0800 |
| commit | e86328c489d7ecdca99410a06a3f448caf7857bf (patch) | |
| tree | 5fab7d3abeb891c77c329d9bbaf6c15cea33b4e0 | |
| parent | bc9d8c20ffb47e64a41a4716a06d37cdf88fcc42 (diff) | |
| parent | 0963670aeaec2287aa263daa0d41384d4dcd5292 (diff) | |
Merge tag 'gpio-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"Here is the bulk of GPIO changes for the v4.4 development cycle.
The only changes hitting outside drivers/gpio are in the pin control
subsystem and these seem to have settled nicely in linux-next.
Development mistakes and catfights are nicely documented in the
reverts as you can see. The outcome of the ABI fight is that we're
working on a chardev ABI for GPIO now, where hope to show results for
the v4.5 kernel.
Summary of changes:
GPIO core:
- Define and handle flags for open drain/open collector and open
source/open emitter, also know as "single-ended" configurations.
- Generic request/free operations that handle calling out to the
(optional) pin control backend.
- Some refactoring related to an ABI change that did not happen, yet
provide useful.
- Added a real-time compliance checklist. Many GPIO chips have
irqchips, and need to think this over with the RT patches going
upstream.
- Restructure, fix and clean up Kconfig menus a bit.
New drivers:
- New driver for AMD Promony.
- New driver for ACCES 104-IDIO-16, a port-mapped I/O card,
ISA-style. Very retro.
Subdriver changes:
- OMAP changes to handle real time requirements.
- Handle trigger types for edge and level IRQs on PL061 properly. As
this hardware is very common it needs to set a proper example for
others to follow.
- Some container_of() cleanups.
- Delete the unused MSM driver in favor of the driver that is
embedded inside the pin control driver.
- Cleanup of the ath79 GPIO driver used by many, many OpenWRT router
targets.
- A consolidated IT87xx driver replacing the earlier very specific
IT8761e driver.
- Handle the TI TCA9539 in the PCA953x driver. Also handle ACPI
devices in this subdriver.
- Drop xilinx arch dependencies as these FPGAs seem to profilate over
a few different architectures. MIPS and ARM come to mind"
* tag 'gpio-v4.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (57 commits)
gpio: fix up SPI submenu
gpio: drop surplus I2C dependencies
gpio: drop surplus X86 dependencies
gpio: dt-bindings: document the official use of "ngpios"
gpio: MAINTAINERS: Add an entry for the ATH79 GPIO driver
gpio / ACPI: Allow shared GPIO event to be read via operation region
gpio: group port-mapped I/O drivers in a menu
gpio: Add ACCES 104-IDIO-16 driver maintainer entry
gpio: zynq: Document interrupt-controller DT binding
gpio: xilinx: Drop architecture dependencies
gpio: generic: Revert to old error handling in bgpio_map
gpio: add a real time compliance notes
Revert "gpio: add a real time compliance checklist"
gpio: Add GPIO support for the ACCES 104-IDIO-16
gpio: driver for AMD Promontory
gpio: xlp: Convert to use gpiolib irqchip helpers
gpio: add a real time compliance checklist
gpio/xilinx: enable for MIPS
gpiolib: Add and use OF_GPIO_SINGLE_ENDED flag
gpiolib: Split GPIO flags parsing and GPIO configuration
...
62 files changed, 1728 insertions, 1473 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-msm.txt b/Documentation/devicetree/bindings/gpio/gpio-msm.txt deleted file mode 100644 index ac20e68a004e..000000000000 --- a/Documentation/devicetree/bindings/gpio/gpio-msm.txt +++ /dev/null @@ -1,26 +0,0 @@ -MSM GPIO controller bindings - -Required properties: -- compatible: - - "qcom,msm-gpio" for MSM controllers -- #gpio-cells : Should be two. - - first cell is the pin number - - second cell is used to specify optional parameters (unused) -- gpio-controller : Marks the device node as a GPIO controller. -- #interrupt-cells : Should be 2. -- interrupt-controller: Mark the device node as an interrupt controller -- interrupts : Specify the TLMM summary interrupt number -- ngpio : Specify the number of MSM GPIOs - -Example: - - msmgpio: gpio@fd510000 { - compatible = "qcom,msm-gpio"; - gpio-controller; - #gpio-cells = <2>; - interrupt-controller; - #interrupt-cells = <2>; - reg = <0xfd510000 0x4000>; - interrupts = <0 208 0>; - ngpio = <150>; - }; diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt b/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt index b9a42f294dd0..13df9933f4cd 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt @@ -24,6 +24,7 @@ Required properties: ti,tca6408 ti,tca6416 ti,tca6424 + ti,tca9539 exar,xra1202 Example: diff --git a/Documentation/devicetree/bindings/gpio/gpio-zynq.txt b/Documentation/devicetree/bindings/gpio/gpio-zynq.txt index db4c6a663c03..7b542657f259 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-zynq.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-zynq.txt @@ -12,6 +12,13 @@ Required properties: - interrupts : Interrupt specifier (see interrupt bindings for details) - interrupt-parent : Must be core interrupt controller +- interrupt-controller : Marks the device node as an interrupt controller. +- #interrupt-cells : Should be 2. The first cell is the GPIO number. + The second cell bits[3:0] is used to specify trigger type and level flags: + 1 = low-to-high edge triggered. + 2 = high-to-low edge triggered. + 4 = active high level-sensitive. + 8 = active low level-sensitive. - reg : Address and length of the register set for the device Example: @@ -22,5 +29,7 @@ Example: gpio-controller; interrupt-parent = <&intc>; interrupts = <0 20 4>; + interrupt-controller; + #interrupt-cells = <2>; reg = <0xe000a000 0x1000>; }; diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt index 82d40e2505f6..069cdf6f9dac 100644 --- a/Documentation/devicetree/bindings/gpio/gpio.txt +++ b/Documentation/devicetree/bindings/gpio/gpio.txt @@ -54,9 +54,13 @@ only uses one. gpio-specifier may encode: bank, pin position inside the bank, whether pin is open-drain and whether pin is logically inverted. + Exact meaning of each specifier cell is controller specific, and must -be documented in the device tree binding for the device. Use the macros -defined in include/dt-bindings/gpio/gpio.h whenever possible: +be documented in the device tree binding for the device. + +Most controllers are however specifying a generic flag bitfield +in the last cell, so for these, use the macros defined in +include/dt-bindings/gpio/gpio.h whenever possible: Example of a node using GPIOs: @@ -67,6 +71,15 @@ Example of a node using GPIOs: GPIO_ACTIVE_HIGH is 0, so in this example gpio-specifier is "18 0" and encodes GPIO pin number, and GPIO flags as accepted by the "qe_pio_e" gpio-controller. +Optional standard bitfield specifiers for the last cell: + +- Bit 0: 0 means active high, 1 means active low +- Bit 1: 1 means single-ended wiring, see: + https://en.wikipedia.org/wiki/Single-ended_triode + When used with active-low, this means open drain/collector, see: + https://en.wikipedia.org/wiki/Open_collector + When used with active-high, this means open source/emitter + 1.1) GPIO specifier best practices ---------------------------------- @@ -118,6 +131,30 @@ Every GPIO controller node must contain both an empty "gpio-controller" property, and a #gpio-cells integer property, which indicates the number of cells in a gpio-specifier. +Optionally, a GPIO controller may have a "ngpios" property. This property +indicates the number of in-use slots of available slots for GPIOs. The +typical example is something like this: the hardware register is 32 bits +wide, but only 18 of the bits have a physical counterpart. The driver is +generally written so that all 32 bits can be used, but the IP block is reused +in a lot of designs, some using all 32 bits, some using 18 and some using +12. In this case, setting "ngpios = <18>;" informs the driver that only the +first 18 GPIOs, at local offset 0 .. 17, are in use. + +If these GPIOs do not happen to be the first N GPIOs at offset 0...N-1, an +additional bitmask is needed to specify which GPIOs are actually in use, +and which are dummies. The bindings for this case has not yet been +specified, but should be specified if/when such hardware appears. + +Example: + +gpio-controller@00000000 { + compatible = "foo"; + reg = <0x00000000 0x1000>; + gpio-controller; + #gpio-cells = <2>; + ngpios = <18>; +} + The GPIO chip may contain GPIO hog definitions. GPIO hogging is a mechanism providing automatic GPIO request and configuration as part of the gpio-controller's driver probe function. diff --git a/Documentation/gpio/driver.txt b/Documentation/gpio/driver.txt index 90d0f6aba7a6..12a61948ec91 100644 --- a/Documentation/gpio/driver.txt +++ b/Documentation/gpio/driver.txt @@ -62,6 +62,11 @@ Any debugfs dump method should normally ignore signals which haven't been requested as GPIOs. They can use gpiochip_is_requested(), which returns either NULL or the label associated with that GPIO when it was requested. +RT_FULL: GPIO driver should not use spinlock_t or any sleepable APIs +(like PM runtime) in its gpio_chip implementation (.get/.set and direction +control callbacks) if it is expected to call GPIO APIs from atomic context +on -RT (inside hard IRQ handlers and similar contexts). Normally this should +not be required. GPIO drivers providing IRQs --------------------------- @@ -73,6 +78,13 @@ The IRQ portions of the GPIO block are implemented using an irqchip, using the header <linux/irq.h>. So basically such a driver is utilizing two sub- systems simultaneously: gpio and irq. +RT_FULL: GPIO driver should not use spinlock_t or any sleepable APIs +(like PM runtime) as part of its irq_chip implementation on -RT. +- spinlock_t should be replaced with raw_spinlock_t [1]. +- If sleepable APIs have to be used, these can be done from the .irq_bus_lock() + and .irq_bus_unlock() callbacks, as these are the only slowpath callbacks + on an irqchip. Create the callbacks if needed [2]. + GPIO irqchips usually fall in one of two categories: * CHAINED GPIO irqchips: these are usually the type that is embedded on @@ -93,6 +105,38 @@ GPIO irqchips usually fall in one of two categories: Chained GPIO irqchips typically can NOT set the .can_sleep flag on struct gpio_chip, as everything happens directly in the callbacks. + RT_FULL: Note, chained IRQ handlers will not be forced threaded on -RT. + As result, spinlock_t or any sleepable APIs (like PM runtime) can't be used + in chained IRQ handler. + if required (and if it can't be converted to the nested threaded GPIO irqchip) + - chained IRQ handler can be converted to generic irq handler and this way + it will be threaded IRQ handler on -RT and hard IRQ handler on non-RT + (for example, see [3]). + Know W/A: The generic_handle_irq() is expected to be called with IRQ disabled, + so IRQ core will complain if it will be called from IRQ handler wich is forced + thread. The "fake?" raw lock can be used to W/A this problem: + + raw_spinlock_t wa_lock; + static irqreturn_t omap_gpio_irq_handler(int irq, void *gpiobank) + unsigned long wa_lock_flags; + raw_spin_lock_irqsave(&bank->wa_lock, wa_lock_flags); + generic_handle_irq(irq_find_mapping(bank->chip.irqdomain, bit)); + raw_spin_unlock_irqrestore(&bank->wa_lock, wa_lock_flags); + +* GENERIC CHAINED GPIO irqchips: these are the same as "CHAINED GPIO irqchips", + but chained IRQ handlers are not used. Instead GPIO IRQs dispatching is + performed by generic IRQ handler which is configured using request_irq(). + The GPIO irqchip will then end up calling something like this sequence in + its interrupt handler: + + static irqreturn_t gpio_rcar_irq_handler(int irq, void *dev_id) + for each detected GPIO IRQ + generic_handle_irq(...); + + RT_FULL: Such kind of handlers will be forced threaded on -RT, as result IRQ + core will complain that generic_handle_irq() is called with IRQ enabled and + the same W/A as for "CHAINED GPIO irqchips" can be applied. + * NESTED THREADED GPIO irqchips: these are off-chip GPIO expanders and any other GPIO irqchip residing on the other side of a sleeping bus. Of course such drivers that need slow bus traffic to read out IRQ status and similar, @@ -133,6 +177,13 @@ To use the helpers please keep the following in mind: the irqchip can initialize. E.g. .dev and .can_sleep shall be set up properly. +- Nominally set all handlers to handle_bad_irq() in the setup call and pass + handle_bad_irq() as flow handler parameter in gpiochip_irqchip_add() if it is + expected for GPIO driver that irqchip .set_type() callback have to be called + before using/enabling GPIO IRQ. Then set the handler to handle_level_irq() + and/or handle_edge_irq() in the irqchip .set_type() callback depending on + what your controller supports. + It is legal for any IRQ consumer to request an IRQ from any irqchip no matter if that is a combined GPIO+IRQ driver. The basic premise is that gpio_chip and irq_chip are orthogonal, and offering their services independent of each @@ -169,6 +220,31 @@ When implementing an irqchip inside a GPIO driver, these two functions should typically be called in the .startup() and .shutdown() callbacks from the irqchip. +Real-Time compliance for GPIO IRQ chips +--------------------------------------- + +Any provider of irqchips needs to be carefully tailored to support Real Time +preemption. It is desireable that all irqchips in the GPIO subsystem keep this +in mind and does the proper testing to assure they are real time-enabled. +So, pay attention on above " RT_FULL:" notes, please. +The following is a checklist to follow when preparing a driver for real +time-compliance: + +- ensure spinlock_t is not used as part irq_chip implementation; +- ensure that sleepable APIs are not used as part irq_chip implementation. + If sleepable APIs have to be used, these can be done from the .irq_bus_lock() + and .irq_bus_unlock() callbacks; +- Chained GPIO irqchips: ensure spinlock_t or any sleepable APIs are not used + from chained IRQ handler; +- Generic chained GPIO irqchips: take care about generic_handle_irq() calls and + apply corresponding W/A; +- Chained GPIO irqchips: get rid of chained IRQ handler and use generic irq + handler if possible :) +- regmap_mmio: Sry, but you are in trouble :( if MMIO regmap is used as for + GPIO IRQ chip implementation; +- Test your driver with the appropriate in-kernel real time test cases for both + level and edge IRQs. + Requesting self-owned GPIO pins ------------------------------- @@ -190,3 +266,7 @@ gpiochip_free_own_desc(). These functions must be used with care since they do not affect module use count. Do not use the functions to request gpio descriptors not owned by the calling driver. + +[1] http://www.spinics.net/lists/linux-omap/msg120425.html +[2] https://lkml.org/lkml/2015/9/25/494 +[3] https://lkml.org/lkml/2015/9/25/495 diff --git a/MAINTAINERS b/MAINTAINERS index c9c6052b9951..77ed3a028625 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -240,6 +240,12 @@ L: lm-sensors@lm-sensors.org S: Maintained F: drivers/hwmon/abituguru3.c +ACCES 104-IDIO-16 GPIO DRIVER +M: "William Breathitt Gray" <vilhelm.gray@gmail.com> +L: linux-gpio@vger.kernel.org +S: Maintained +F: drivers/gpio/gpio-104-idio-16.c + ACENIC DRIVER M: Jes Sorensen <jes@trained-monkey.org> L: linux-acenic@sunsite.dk @@ -1780,6 +1786,14 @@ S: Supported F: Documentation/aoe/ F: drivers/block/aoe/ +ATHEROS 71XX/9XXX GPIO DRIVER +M: Alban Bedel <albeu@free.fr> +W: https://github.com/AlbanBedel/linux +T: git git://github.com/AlbanBedel/linux +S: Maintained +F: drivers/gpio/gpio-ath79.c +F: Documentation/devicetree/bindings/gpio/gpio-ath79.txt + ATHEROS ATH GENERIC UTILITIES M: "Luis R. Rodriguez" <mcgrof@do-not-panic.com> L: linux-wireless@vger.kernel.org diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 8949b3f6f74d..b18bea08ff25 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -119,6 +119,13 @@ config GPIO_ALTERA If driver is built as a module it will be called gpio-altera. +config GPIO_AMDPT + tristate "AMD Promontory GPIO support" + depends on ACPI + help + driver for GPIO functionality on Promontory IOHub + Require ACPI ASL code to enumerate as a platform device. + config GPIO_BCM_KONA bool "Broadcom Kona GPIO" depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST) @@ -176,16 +183,6 @@ config GPIO_ETRAXFS help Say yes here to support the GPIO controller on Axis ETRAX FS SoCs. -config GPIO_F7188X - tristate "F71869, F71869A, F71882FG and F71889F GPIO support" - depends on X86 - help - This option enables support for GPIOs found on Fintek Super-I/O - chips F71869, F71869A, F71882FG and F71889F. - - To compile this driver as a module, choose M here: the module will - be called f7188x-gpio. - config GPIO_GE_FPGA bool "GE FPGA based GPIO" depends on GE_FPGA @@ -235,12 +232,6 @@ config GPIO_IOP If unsure, say N. -config GPIO_IT8761E - tristate "IT8761E GPIO support" - depends on X86 # unconditional access to IO space. - help - Say yes here to support GPIO functionality of IT8761E super I/O chip. - config GPIO_LOONGSON bool "Loongson-2/3 GPIO support" depends on CPU_LOONGSON2 || CPU_LOONGSON3 @@ -297,14 +288,6 @@ config GPIO_MPC8XXX Say Y here if you're going to use hardware that connects to the MPC512x/831x/834x/837x/8572/8610 GPIOs. -config GPIO_MSM_V2 - tristate "Qualcomm MSM GPIO v2" - depends on GPIOLIB && OF && ARCH_QCOM - help - Say yes here to support the GPIO interface on ARM v7 based - Qualcomm MSM chips. Most of the pins on the MSM can be - selected for GPIO, and are controlled by this driver. - config GPIO_MVEBU def_bool y depends on PLAT_ORION @@ -368,42 +351,6 @@ config GPIO_SAMSUNG Legacy GPIO support. Use only for platforms without support for pinctrl. -config GPIO_SCH - tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO" - depends on PCI && X86 - select MFD_CORE - select LPC_SCH - help - Say yes here to support GPIO interface on Intel Poulsbo SCH, - Intel Tunnel Creek processor, Intel Centerton processor or - Intel Quark X1000 SoC. - - The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are - powered by the core power rail and are turned off during sleep - modes (S3 and higher). The remaining four GPIOs are powered by - the Intel SCH suspend power supply. These GPIOs remain - active during S3. The suspend powered GPIOs can be used to wake the - system from the Suspend-to-RAM state. - - The Intel Tunnel Creek processor has 5 GPIOs powered by the - core power rail and 9 from suspend power supply. - - The Intel Centerton processor has a total of 30 GPIO pins. - Twenty-one are powered by the core power rail and 9 from the - suspend power supply. - - The Intel Quark X1000 SoC has 2 GPIOs powered by the core - power well and 6 from the suspend power well. - -config GPIO_SCH311X - tristate "SMSC SCH311x SuperI/O GPIO" - help - Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and - SCH3116 "Super I/O" chipsets. - - To compile this driver as a module, choose M here: the module will - be called gpio-sch311x. - config GPIO_SPEAR_SPICS bool "ST SPEAr13xx SPI Chip Select as GPIO support" depends on PLAT_SPEAR @@ -440,15 +387,6 @@ config GPIO_TB10X select GENERIC_IRQ_CHIP select OF_GPIO -config GPIO_TS5500 - tristate "TS-5500 DIO blocks and compatibles" - depends on TS5500 || COMPILE_TEST - help - This driver supports Digital I/O exposed by pin blocks found on some - Technologic Systems platforms. It includes, but is not limited to, 3 - blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600 - LCD port. - config GPIO_TZ1090 bool "Toumaz Xenif TZ1090 GPIO support" depends on SOC_TZ1090 @@ -508,13 +446,13 @@ config GPIO_XGENE_SB config GPIO_XILINX tristate "Xilinx GPIO support" - depends on OF_GPIO && (PPC || MICROBLAZE || ARCH_ZYNQ || X86) + depends on OF_GPIO help Say yes here to support the Xilinx FPGA GPIO device config GPIO_XLP tristate "Netlogic XLP GPIO support" - depends on CPU_XLP + depends on CPU_XLP && OF_GPIO select GPIOLIB_IRQCHIP help This driver provides support for GPIO interface on Netlogic XLP MIPS64 @@ -545,6 +483,87 @@ config GPIO_ZYNQ help Say yes here to support Xilinx Zynq GPIO controller. +config GPIO_ZX + bool "ZTE ZX GPIO support" + select GPIOLIB_IRQCHIP + help + Say yes here to support the GPIO device on ZTE ZX SoCs. + +endmenu + +menu "Port-mapped I/O GPIO drivers" + depends on X86 # Unconditional I/O space access + +config GPIO_104_IDIO_16 + tristate "ACCES 104-IDIO-16 GPIO support" + help + Enables GPIO support for the ACCES 104-IDIO-16 family. + +config GPIO_F7188X + tristate "F71869, F71869A, F71882FG and F71889F GPIO support" + help + This option enables support for GPIOs found on Fintek Super-I/O + chips F71869, F71869A, F71882FG and F71889F. + + To compile this driver as a module, choose M here: the module will + be called f7188x-gpio. + +config GPIO_IT87 + tristate "IT87xx GPIO support" + help + Say yes here to support GPIO functionality of IT87xx Super I/O chips. + + This driver is tested with ITE IT8728 and IT8732 Super I/O chips, and + supports the IT8761E Super I/O chip as well. + + To compile this driver as a module, choose M here: the module will + be called gpio_it87 + +config GPIO_SCH + tristate "Intel SCH/TunnelCreek/Centerton/Quark X1000 GPIO" + depends on PCI + select MFD_CORE + select LPC_SCH + help + Say yes here to support GPIO interface on Intel Poulsbo SCH, + Intel Tunnel Creek processor, Intel Centerton processor or + Intel Quark X1000 SoC. + + The Intel SCH contains a total of 14 GPIO pins. Ten GPIOs are + powered by the core power rail and are turned off during sleep + modes (S3 and higher). The remaining four GPIOs are powered by + the Intel SCH suspend power supply. These GPIOs remain + active during S3. The suspend powered GPIOs can be used to wake the + system from the Suspend-to-RAM state. + + The Intel Tunnel Creek processor has 5 GPIOs powered by the + core power rail and 9 from suspend power supply. + + The Intel Centerton processor has a total of 30 GPIO pins. + Twenty-one are powered by the core power rail and 9 from the + suspend power supply. + + The Intel Quark X1000 SoC has 2 GPIOs powered by the core + power well and 6 from the suspend power well. + +config GPIO_SCH311X + tristate "SMSC SCH311x SuperI/O GPIO" + help + Driver to enable the GPIOs found on SMSC SMSC SCH3112, SCH3114 and + SCH3116 "Super I/O" chipsets. + + To compile this driver as a module, choose M here: the module will + be called gpio-sch311x. + +config GPIO_TS5500 + tristate "TS-5500 DIO blocks and compatibles" + depends on TS5500 || COMPILE_TEST + help + This driver supports Digital I/O exposed by pin blocks found on some + Technologic Systems platforms. It includes, but is not limited to, 3 + blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600 + LCD port. + endmenu menu "I2C GPIO expanders" @@ -552,7 +571,6 @@ menu "I2C GPIO expanders" config GPIO_ADP5588 tristate "ADP5588 I2C GPIO expander" - depends on I2C help This option enables support for 18 GPIOs found on Analog Devices ADP5588 GPIO Expanders. @@ -566,7 +584,7 @@ config GPIO_ADP5588_IRQ config GPIO_ADNP tristate "Avionic Design N-bit GPIO expander" - depends on I2C && OF_GPIO + depends on OF_GPIO select GPIOLIB_IRQCHIP help This option enables support for N GPIOs found on Avionic Design @@ -578,14 +596,12 @@ config GPIO_ADNP config GPIO_MAX7300 tristate "Maxim MAX7300 GPIO expander" - depends on I2C select GPIO_MAX730X help GPIO driver for Maxim MAX7300 I2C-based GPIO expander. config GPIO_MAX732X tristate "MAX7319, MAX7320-7327 I2C Port Expanders" - depends on I2C help Say yes here to support the MAX7319, MAX7320-7327 series of I2C Port Expanders. Each IO port on these chips has a fixed role of @@ -618,7 +634,6 @@ config GPIO_MC9S08DZ60 config GPIO_PCA953X tristate "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports" - depends on I2C help Say yes here to provide access to several register-oriented SMBus I/O expanders, made mostly by NXP or TI. Compatible @@ -646,7 +661,6 @@ config GPIO_PCA953X_IRQ config GPIO_PCF857X tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders" - depends on I2C select GPIOLIB_IRQCHIP select IRQ_DOMAIN help @@ -976,7 +990,7 @@ menu "SPI GPIO expanders" config GPIO_74X164 tristate "74x164 serial-in/parallel-out 8-bits shift register" - depends on SPI_MASTER && OF + depends on OF help Driver for 74x164 compatible serial-in/parallel-out 8-outputs shift registers. This driver can be used to provide access @@ -984,32 +998,28 @@ config GPIO_74X164 config GPIO_MAX7301 tristate "Maxim MAX7301 GPIO expander" - depends on SPI_MASTER select GPIO_MAX730X help GPIO driver for Maxim MAX7301 SPI-based GPIO expander. -config GPIO_MCP23S08 - tristate "Microchip MCP23xxx I/O expander" - depends on (SPI_MASTER && !I2C) || I2C - help - SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 - I/O expanders. - This provides a GPIO interface supporting inputs and outputs. - The I2C versions of the chips can be used as interrupt-controller. - config GPIO_MC33880 tristate "Freescale MC33880 high-side/low-side switch" - depends on SPI_MASTER help SPI driver for Freescale MC33880 high-side/low-side switch. This provides GPIO interface supporting inputs and outputs. -config GPIO_ZX - bool "ZTE ZX GPIO support" - select GPIOLIB_IRQCHIP +endmenu + +menu "SPI or I2C GPIO expanders" + depends on (SPI_MASTER && !I2C) || I2C + +config GPIO_MCP23S08 + tristate "Microchip MCP23xxx I/O expander" help - Say yes here to support the GPIO device on ZTE ZX SoCs. + SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017 + I/O expanders. + This provides a GPIO interface supporting inputs and outputs. + The I2C versions of the chips can be used as interrupt-controller. endmenu diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index f79a7c482a99..986dbd838cea 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -12,6 +12,7 @@ obj-$(CONFIG_GPIO_ACPI) += gpiolib-acpi.o # Device drivers. Generally keep list sorted alphabetically obj-$(CONFIG_GPIO_GENERIC) += gpio-generic.o +obj-$(CONFIG_GPIO_104_IDIO_16) += gpio-104-idio-16.o obj-$(CONFIG_GPIO_74X164) += gpio-74x164.o obj-$(CONFIG_GPIO_74XX_MMIO) += gpio-74xx-mmio.o obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o @@ -19,6 +20,7 @@ obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o obj-$(CONFIG_GPIO_ADP5588) += gpio-adp5588.o obj-$(CONFIG_GPIO_ALTERA) += gpio-altera.o obj-$(CONFIG_GPIO_AMD8111) += gpio-amd8111.o +obj-$(CONFIG_GPIO_AMDPT) += gpio-amdpt.o obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizona.o obj-$(CONFIG_ATH79) += gpio-ath79.o obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o @@ -40,7 +42,7 @@ obj-$(CONFIG_GPIO_GE_FPGA) += gpio-ge.o obj-$(CONFIG_GPIO_GRGPIO) += gpio-grgpio.o obj-$(CONFIG_GPIO_ICH) += gpio-ich.o obj-$(CONFIG_GPIO_IOP) += gpio-iop.o -obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o +obj-$(CONFIG_GPIO_IT87) += gpio-it87.o obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o obj-$(CONFIG_GPIO_KEMPLD) += gpio-kempld.o obj-$(CONFIG_ARCH_KS8695) += gpio-ks8695.o @@ -64,7 +66,6 @@ obj-$(CONFIG_GPIO_MOXART) += gpio-moxart.o obj-$(CONFIG_GPIO_MPC5200) += gpio-mpc5200.o obj-$(CONFIG_GPIO_MPC8XXX) += gpio-mpc8xxx.o obj-$(CONFIG_GPIO_MSIC) += gpio-msic.o -obj-$(CONFIG_GPIO_MSM_V2) += gpio-msm-v2.o obj-$(CONFIG_GPIO_MVEBU) += gpio-mvebu.o obj-$(CONFIG_GPIO_MXC) += gpio-mxc.o obj-$(CONFIG_GPIO_MXS) += gpio-mxs.o diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c new file mode 100644 index 000000000000..5400d7d4d8fd --- /dev/null +++ b/drivers/gpio/gpio-104-idio-16.c @@ -0,0 +1,216 @@ +/* + * GPIO driver for the ACCES 104-IDIO-16 family + * Copyright (C) 2015 William Breathitt Gray + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/gpio/driver.h> +#include <linux/io.h> +#include <linux/ioport.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> + +static unsigned idio_16_base; +module_param(idio_16_base, uint, 0); +MODULE_PARM_DESC(idio_16_base, "ACCES 104-IDIO-16 base address"); + +/** + * struct idio_16_gpio - GPIO device private data structure + * @chip: instance of the gpio_chip + * @lock: synchronization lock to prevent gpio_set race conditions + * @base: base port address of the GPIO device + * @extent: extent of port address region of the GPIO device + * @out_state: output bits state + */ +struct idio_16_gpio { + struct gpio_chip chip; + spinlock_t lock; + unsigned base; + unsigned extent; + unsigned out_state; +}; + +static int idio_16_gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + if (offset > 15) + return 1; + + return 0; +} + +static int idio_16_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + return 0; +} + +static int idio_16_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + chip->set(chip, offset, value); + return 0; +} + +static struct idio_16_gpio *to_idio16gpio(struct gpio_chip *gc) +{ + return container_of(gc, struct idio_16_gpio, chip); +} + +static int idio_16_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct idio_16_gpio *const idio16gpio = to_idio16gpio(chip); + const unsigned BIT_MASK = 1U << (offset-16); + + if (offset < 16) + return -EINVAL; + + if (offset < 24) + return !!(inb(idio16gpio->base + 1) & BIT_MASK); + + return !!(inb(idio16gpio->base + 5) & (BIT_MASK>>8)); +} + +static void idio_16_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + struct idio_16_gpio *const idio16gpio = to_idio16gpio(chip); + const unsigned BIT_MASK = 1U << offset; + unsigned long flags; + + if (offset > 15) + return; + + spin_lock_irqsave(&idio16gpio->lock, flags); + + if (value) + idio16gpio->out_state |= BIT_MASK; + else + idio16gpio->out_state &= ~BIT_MASK; + + if (offset > 7) + outb(idio16gpio->out_state >> 8, idio16gpio->base + 4); + else + outb(idio16gpio->out_state, idio16gpio->base); + + spin_unlock_irqrestore(&idio16gpio->lock, flags); +} + +static int __init idio_16_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct idio_16_gpio *idio16gpio; + int err; + + const unsigned BASE = idio_16_base; + const unsigned EXTENT = 8; + const char *const NAME = dev_name(dev); + + idio16gpio = devm_kzalloc(dev, sizeof(*idio16gpio), GFP_KERNEL); + if (!idio16gpio) + return -ENOMEM; + + if (!request_region(BASE, EXTENT, NAME)) { + dev_err(dev, "Unable to lock %s port addresses (0x%X-0x%X)\n", + NAME, BASE, BASE + EXTENT); + err = -EBUSY; + goto err_lock_io_port; + } + + idio16gpio->chip.label = NAME; + idio16gpio->chip.dev = dev; + idio16gpio->chip.owner = THIS_MODULE; + idio16gpio->chip.base = -1; + idio16gpio->chip.ngpio = 32; + idio16gpio->chip.get_direction = idio_16_gpio_get_direction; + idio16gpio->chip.direction_input = idio_16_gpio_direction_input; + idio16gpio->chip.direction_output = idio_16_gpio_direction_output; + idio16gpio->chip.get = idio_16_gpio_get; + idio16gpio->chip.set = idio_16_gpio_set; + idio16gpio->base = BASE; + idio16gpio->extent = EXTENT; + idio16gpio->out_state = 0xFFFF; + + spin_lock_init(&idio16gpio->lock); + + dev_set_drvdata(dev, idio16gpio); + + err = gpiochip_add(&idio16gpio->chip); + if (err) { + dev_err(dev, "GPIO registering failed (%d)\n", err); + goto err_gpio_register; + } + + return 0; + +err_gpio_register: + release_region(BASE, EXTENT); +err_lock_io_port: + return err; +} + +static int idio_16_remove(struct platform_device *pdev) +{ + struct idio_16_gpio *const idio16gpio = platform_get_drvdata(pdev); + + gpiochip_remove(&idio16gpio->chip); + release_region(idio16gpio->base, idio16gpio->extent); + + return 0; +} + +static struct platform_device *idio_16_device; + +static struct platform_driver idio_16_driver = { + .driver = { + .name = "104-idio-16" + }, + .remove = idio_16_remove +}; + +static void __exit idio_16_exit(void) +{ + platform_device_unregister(idio_16_device); + platform_driver_unregister(&idio_16_driver); +} + +static int __init idio_16_init(void) +{ + int err; + + idio_16_device = platform_device_alloc(idio_16_driver.driver.name, -1); + if (!idio_16_device) + return -ENOMEM; + + err = platform_device_add(idio_16_device); + if (err) + goto err_platform_device; + + err = platform_driver_probe(&idio_16_driver, idio_16_probe); + if (err) + goto err_platform_driver; + + return 0; + +err_platform_driver: + platform_device_del(idio_16_device); +err_platform_device: + platform_device_put(idio_16_device); + return err; +} + +module_init(idio_16_init); +module_exit(idio_16_exit); + +MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>"); +MODULE_DESCRIPTION("ACCES 104-IDIO-16 GPIO driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpio/gpio-altera.c b/drivers/gpio/gpio-altera.c index 1b44941574fa..3e6661bab54a 100644 --- a/drivers/gpio/gpio-altera.c +++ b/drivers/gpio/gpio-altera.c @@ -42,6 +42,11 @@ struct altera_gpio_chip { int mapped_irq; }; +static struct altera_gpio_chip *to_altera(struct gpio_chip *gc) +{ + return container_of(gc, struct altera_gpio_chip, mmchip.gc); +} + static void altera_gpio_irq_unmask(struct irq_data *d) { struct altera_gpio_chip *altera_gc; @@ -49,7 +54,7 @@ static void altera_gpio_irq_unmask(struct irq_data *d) unsigned long flags; u32 intmask; - altera_gc = irq_data_get_irq_chip_data(d); + altera_gc = to_altera(irq_data_get_irq_chip_data(d)); mm_gc = &altera_gc->mmchip; spin_lock_irqsave(&altera_gc->gpio_lock, flags); @@ -67,7 +72,7 @@ static void altera_gpio_irq_mask(struct irq_data *d) unsigned long flags; u32 intmask; - altera_gc = irq_data_get_irq_chip_data(d); + altera_gc = to_altera(irq_data_get_irq_chip_data(d)); mm_gc = &altera_gc->mmchip; spin_lock_irqsave(&altera_gc->gpio_lock, flags); @@ -87,7 +92,7 @@ static int altera_gpio_irq_set_type(struct irq_data *d, { struct altera_gpio_chip *altera_gc; - altera_gc = irq_data_get_irq_chip_data(d); + altera_gc = to_altera(irq_data_get_irq_chip_data(d)); if (type == IRQ_TYPE_NONE) return 0; @@ -210,7 +215,7 @@ static void altera_gpio_irq_edge_handler(struct irq_desc *desc) unsigned long status; int i; - altera_gc = irq_desc_get_handler_data(desc); + altera_gc = to_altera(irq_desc_get_handler_data(desc)); chip = irq_desc_get_chip(desc); mm_gc = &altera_gc->mmchip; irqdomain = altera_gc->mmchip.gc.irqdomain; @@ -239,7 +244,7 @@ static void altera_gpio_irq_leveL_high_handler(struct irq_desc *desc) unsigned long status; int i; - altera_gc = irq_desc_get_handler_data(desc); + altera_gc = to_altera(irq_desc_get_handler_data(desc)); chip = irq_desc_get_chip(desc); mm_gc = &altera_gc->mmchip; irqdomain = altera_gc->mmchip.gc.irqdomain; diff --git a/drivers/gpio/gpio-amdpt.c b/drivers/gpio/gpio-amdpt.c new file mode 100644 index 000000000000..cbbb966d4fc0 --- /dev/null +++ b/drivers/gpio/gpio-amdpt.c @@ -0,0 +1,261 @@ +/* + * AMD Promontory GPIO driver + * + * Copyright (C) 2015 ASMedia Technology Inc. + * Author: YD Tseng <yd_tseng@asmedia.com.tw> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/gpio/driver.h> +#include <linux/spinlock.h> +#include <linux/acpi.h> +#include <linux/platform_device.h> + +#define PT_TOTAL_GPIO 8 + +/* PCI-E MMIO register offsets */ +#define PT_DIRECTION_REG 0x00 +#define PT_INPUTDATA_REG 0x04 +#define PT_OUTPUTDATA_REG 0x08 +#define PT_CLOCKRATE_REG 0x0C +#define PT_SYNC_REG 0x28 + +struct pt_gpio_chip { + struct gpio_chip gc; + void __iomem *reg_base; + spinlock_t lock; +}; + +#define to_pt_gpio(c) container_of(c, struct pt_gpio_chip, gc) + +static int pt_gpio_request(struct gpio_chip *gc, unsigned offset) +{ + struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc); + unsigned long flags; + u32 using_pins; + + dev_dbg(gc->dev, "pt_gpio_request offset=%x\n", offset); + + spin_lock_irqsave(&pt_gpio->lock, flags); + + using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG); + if (using_pins & BIT(offset)) { + dev_warn(gc->dev, "PT GPIO pin %x reconfigured\n", + offset); + spin_unlock_irqrestore(&pt_gpio->lock, flags); + return -EINVAL; + } + + writel(using_pins | BIT(offset), pt_gpio->reg_base + PT_SYNC_REG); + + spin_unlock_irqrestore(&pt_gpio->lock, flags); + + return 0; +} + +static void pt_gpio_free(struct gpio_chip *gc, unsigned offset) +{ + struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc); + unsigned long flags; + u32 using_pins; + + spin_lock_irqsave(&pt_gpio->lock, flags); + + using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG); + using_pins &= ~BIT(offset); + writel(using_pins, pt_gpio->reg_base + PT_SYNC_REG); + + spin_unlock_irqrestore(&pt_gpio->lock, flags); + + dev_dbg(gc->dev, "pt_gpio_free offset=%x\n", offset); +} + +static void pt_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value) +{ + struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc); + unsigned long flags; + u32 data; + + dev_dbg(gc->dev, "pt_gpio_set_value offset=%x, value=%x\n", + offset, value); + + spin_lock_irqsave(&pt_gpio->lock, flags); + + data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG); + data &= ~BIT(offset); + if (value) + data |= BIT(offset); + writel(data, pt_gpio->reg_base + PT_OUTPUTDATA_REG); + + spin_unlock_irqrestore(&pt_gpio->lock, flags); +} + +static int pt_gpio_get_value(struct gpio_chip *gc, unsigned offset) +{ + struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc); + unsigned long flags; + u32 data; + + spin_lock_irqsave(&pt_gpio->lock, flags); + + data = readl(pt_gpio->reg_base + PT_DIRECTION_REG); + + /* configure as output */ + if (data & BIT(offset)) + data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG); + else /* configure as input */ + data = readl(pt_gpio->reg_base + PT_INPUTDATA_REG); + + spin_unlock_irqrestore(&pt_gpio->lock, flags); + + data >>= offset; + data &= 1; + + dev_dbg(gc->dev, "pt_gpio_get_value offset=%x, value=%x\n", + offset, data); + + return data; +} + +static int pt_gpio_direction_input(struct gpio_chip *gc, unsigned offset) +{ + struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc); + unsigned long flags; + u32 data; + + dev_dbg(gc->dev, "pt_gpio_dirction_input offset=%x\n", offset); + + spin_lock_irqsave(&pt_gpio->lock, flags); + + data = readl(pt_gpio->reg_base + PT_DIRECTION_REG); + data &= ~BIT(offset); + writel(data, pt_gpio->reg_base + PT_DIRECTION_REG); + + spin_unlock_irqrestore(&pt_gpio->lock, flags); + + return 0; +} + +static int pt_gpio_direction_output(struct gpio_chip *gc, + unsigned offset, int value) +{ + struct pt_gpio_chip *pt_gpio = to_pt_gpio(gc); + unsigned long flags; + u32 data; + + dev_dbg(gc->dev, "pt_gpio_direction_output offset=%x, value=%x\n", + offset, value); + + spin_lock_irqsave(&pt_gpio->lock, flags); + + data = readl(pt_gpio->reg_base + PT_OUTPUTDATA_REG); + if (value) + data |= BIT(offset); + else + data &= ~BIT(offset); + writel(data, pt_gpio->reg_base + PT_OUTPUTDATA_REG); + + data = readl(pt_gpio->reg_base + PT_DIRECTION_REG); + data |= BIT(offset); + writel(data, pt_gpio->reg_base + PT_DIRECTION_REG); + + spin_unlock_irqrestore(&pt_gpio->lock, flags); + + return 0; +} + +static int pt_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct acpi_device *acpi_dev; + acpi_handle handle = ACPI_HANDLE(dev); + struct pt_gpio_chip *pt_gpio; + struct resource *res_mem; + int ret = 0; + + if (acpi_bus_get_device(handle, &acpi_dev)) { + dev_err(dev, "PT GPIO device node not found\n"); + return -ENODEV; + } + + pt_gpio = devm_kzalloc(dev, sizeof(struct pt_gpio_chip), GFP_KERNEL); + if (!pt_gpio) + return -ENOMEM; + + res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res_mem) { + dev_err(&pdev->dev, "Failed to get MMIO resource for PT GPIO.\n"); + return -EINVAL; + } + pt_gpio->reg_base = devm_ioremap_resource(dev, res_mem); + if (IS_ERR(pt_gpio->reg_base)) { + dev_err(&pdev->dev, "Failed to map MMIO resource for PT GPIO.\n"); + return PTR_ERR(pt_gpio->reg_base); + } + + spin_lock_init(&pt_gpio->lock); + + pt_gpio->gc.label = pdev->name; + pt_gpio->gc.owner = THIS_MODULE; + pt_gpio->gc.dev = dev; + pt_gpio->gc.request = pt_gpio_request; + pt_gpio->gc.free = pt_gpio_free; + pt_gpio->gc.direction_input = pt_gpio_direction_input; + pt_gpio->gc.direction_output = pt_gpio_direction_output; + pt_gpio->gc.get = pt_gpio_get_value; + pt_gpio->gc.set = pt_gpio_set_value; + pt_gpio->gc.base = -1; + pt_gpio->gc.ngpio = PT_TOTAL_GPIO; +#if defined(CONFIG_OF_GPIO) + pt_gpio->gc.of_node = pdev->dev.of_node; +#endif + ret = gpiochip_add(&pt_gpio->gc); + if (ret) { + dev_err(&pdev->dev, "Failed to register GPIO lib\n"); + return ret; + } + + platform_set_drvdata(pdev, pt_gpio); + + /* initialize register setting */ + writel(0, pt_gpio->reg_base + PT_SYNC_REG); + writel(0, pt_gpio->reg_base + PT_CLOCKRATE_REG); + + dev_dbg(&pdev->dev, "PT GPIO driver loaded\n"); + return ret; +} + +static int pt_gpio_remove(struct platform_device *pdev) +{ + struct pt_gpio_chip *pt_gpio = platform_get_drvdata(pdev); + + gpiochip_remove(&pt_gpio->gc); + + return 0; +} + +static const struct acpi_device_id pt_gpio_acpi_match[] = { + { "AMDF030", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(acpi, pt_gpio_acpi_match); + +static struct platform_driver pt_gpio_driver = { + .driver = { + .name = "pt-gpio", + .acpi_match_table = ACPI_PTR(pt_gpio_acpi_match), + }, + .probe = pt_gpio_probe, + .remove = pt_gpio_remove, +}; + +module_platform_driver(pt_gpio_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("YD Tseng <yd_tseng@asmedia.com.tw>"); +MODULE_DESCRIPTION("AMD Promontory GPIO Driver"); diff --git a/drivers/gpio/gpio-arizona.c b/drivers/gpio/gpio-arizona.c index 052fbc8fdaaa..ca002739616a 100644 --- a/drivers/gpio/gpio-arizona.c +++ b/drivers/gpio/gpio-arizona.c @@ -118,6 +118,8 @@ static int arizona_gpio_probe(struct platform_device *pdev) case WM5110: case WM8280: case WM8997: + case WM8998: + case WM1814: arizona_gpio->gpio_chip.ngpio = 5; break; default: diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c index 03b995304ad6..e5827a56ff3b 100644 --- a/drivers/gpio/gpio-ath79.c +++ b/drivers/gpio/gpio-ath79.c @@ -12,61 +12,51 @@ * by the Free Software Foundation. */ -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/types.h> -#include <linux/spinlock.h> -#include <linux/io.h> -#include <linux/ioport.h> -#include <linux/gpio.h> +#include <linux/gpio/driver.h> #include <linux/platform_data/gpio-ath79.h> #include <linux/of_device.h> #include <asm/mach-ath79/ar71xx_regs.h> -static void __iomem *ath79_gpio_base; -static u32 ath79_gpio_count; -static DEFINE_SPINLOCK(ath79_gpio_lock); +struct ath79_gpio_ctrl { + struct gpio_chip chip; + void __iomem *base; + spinlock_t lock; +}; + +#define to_ath79_gpio_ctrl(c) container_of(c, struct ath79_gpio_ctrl, chip) -static void __ath79_gpio_set_value(unsigned gpio, int value) +static void ath79_gpio_set_value(struct gpio_chip *chip, + unsigned gpio, int value) { - void __iomem *base = ath79_gpio_base; + struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip); if (value) - __raw_writel(1 << gpio, base + AR71XX_GPIO_REG_SET); + __raw_writel(BIT(gpio), ctrl->base + AR71XX_GPIO_REG_SET); else - __raw_writel(1 << gpio, base + AR71XX_GPIO_REG_CLEAR); + __raw_writel(BIT(gpio), ctrl->base + AR71XX_GPIO_REG_CLEAR); } -static int __ath79_gpio_get_value(unsigned gpio) +static int ath79_gpio_get_value(struct gpio_chip *chip, unsigned gpio) { - return (__raw_readl(ath79_gpio_base + AR71XX_GPIO_REG_IN) >> gpio) & 1; -} + struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip); -static int ath79_gpio_get_value(struct gpio_chip *chip, unsigned offset) -{ - return __ath79_gpio_get_value(offset); -} - -static void ath79_gpio_set_value(struct gpio_chip *chip, - unsigned offset, int value) -{ - __ath79_gpio_set_value(offset, value); + return (__raw_readl(ctrl->base + AR71XX_GPIO_REG_IN) >> gpio) & 1; } static int ath79_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { - void __iomem *base = ath79_gpio_base; + struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip); unsigned long flags; - spin_lock_irqsave(&ath79_gpio_lock, flags); + spin_lock_irqsave(&ctrl->lock, flags); - __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) & ~(1 << offset), - base + AR71XX_GPIO_REG_OE); + __raw_writel( + __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) & ~BIT(offset), + ctrl->base + AR71XX_GPIO_REG_OE); - spin_unlock_irqrestore(&ath79_gpio_lock, flags); + spin_unlock_irqrestore(&ctrl->lock, flags); return 0; } @@ -74,35 +64,37 @@ static int ath79_gpio_direction_input(struct gpio_chip *chip, static int ath79_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { - void __iomem *base = ath79_gpio_base; + struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip); unsigned long flags; - spin_lock_irqsave(&ath79_gpio_lock, flags); + spin_lock_irqsave(&ctrl->lock, flags); if (value) - __raw_writel(1 << offset, base + AR71XX_GPIO_REG_SET); + __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_SET); else - __raw_writel(1 << offset, base + AR71XX_GPIO_REG_CLEAR); + __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_CLEAR); - __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) | (1 << offset), - base + AR71XX_GPIO_REG_OE); + __raw_writel( + __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) | BIT(offset), + ctrl->base + AR71XX_GPIO_REG_OE); - spin_unlock_irqrestore(&ath79_gpio_lock, flags); + spin_unlock_irqrestore(&ctrl->lock, flags); return 0; } static int ar934x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { - void __iomem *base = ath79_gpio_base; + struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip); unsigned long flags; - spin_lock_irqsave(&ath79_gpio_lock, flags); + spin_lock_irqsave(&ctrl->lock, flags); - __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) | (1 << offset), - base + AR71XX_GPIO_REG_OE); + __raw_writel( + __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) | BIT(offset), + ctrl->base + AR71XX_GPIO_REG_OE); - spin_unlock_irqrestore(&ath79_gpio_lock, flags); + spin_unlock_irqrestore(&ctrl->lock, flags); return 0; } @@ -110,25 +102,26 @@ static int ar934x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) static int ar934x_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { - void __iomem *base = ath79_gpio_base; + struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip); unsigned long flags; - spin_lock_irqsave(&ath79_gpio_lock, flags); + spin_lock_irqsave(&ctrl->lock, flags); if (value) - __raw_writel(1 << offset, base + AR71XX_GPIO_REG_SET); + __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_SET); else - __raw_writel(1 << offset, base + AR71XX_GPIO_REG_CLEAR); + __raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_CLEAR); - __raw_writel(__raw_readl(base + AR71XX_GPIO_REG_OE) & ~(1 << offset), - base + AR71XX_GPIO_REG_OE); + __raw_writel( + __raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) & BIT(offset), + ctrl->base + AR71XX_GPIO_REG_OE); - spin_unlock_irqrestore(&ath79_gpio_lock, flags); + spin_unlock_irqrestore(&ctrl->lock, flags); return 0; } -static struct gpio_chip ath79_gpio_chip = { +static const struct gpio_chip ath79_gpio_chip = { .label = "ath79", .get = ath79_gpio_get_value, .set = ath79_gpio_set_value, @@ -147,10 +140,16 @@ static int ath79_gpio_probe(struct platform_device *pdev) { struct ath79_gpio_platform_data *pdata = pdev->dev.platform_data; struct device_node *np = pdev->dev.of_node; + struct ath79_gpio_ctrl *ctrl; struct resource *res; + u32 ath79_gpio_count; bool oe_inverted; int err; + ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + return -ENOMEM; + if (np) { err = of_property_read_u32(np, "ngpios", &ath79_gpio_count); if (err) { @@ -171,19 +170,21 @@ static int ath79_gpio_probe(struct platform_device *pdev) } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - ath79_gpio_base = devm_ioremap_nocache( + ctrl->base = devm_ioremap_nocache( &pdev->dev, res->start, resource_size(res)); - if (!ath79_gpio_base) + if (!ctrl->base) return -ENOMEM; - ath79_gpio_chip.dev = &pdev->dev; - ath79_gpio_chip.ngpio = ath79_gpio_count; + spin_lock_init(&ctrl->lock); + memcpy(&ctrl->chip, &ath79_gpio_chip, sizeof(ctrl->chip)); + ctrl->chip.dev = &pdev->dev; + ctrl->chip.ngpio = ath79_gpio_count; if (oe_inverted) { - ath79_gpio_chip.direction_input = ar934x_gpio_direction_input; - ath79_gpio_chip.direction_output = ar934x_gpio_direction_output; + ctrl->chip.direction_input = ar934x_gpio_direction_input; + ctrl->chip.direction_output = ar934x_gpio_direction_output; } - err = gpiochip_add(&ath79_gpio_chip); + err = gpiochip_add(&ctrl->chip); if (err) { dev_err(&pdev->dev, "cannot add AR71xx GPIO chip, error=%d", err); diff --git a/drivers/gpio/gpio-etraxfs.c b/drivers/gpio/gpio-etraxfs.c index 2ffcd9fdd1f2..5c15dd12172d 100644 --- a/drivers/gpio/gpio-etraxfs.c +++ b/drivers/gpio/gpio-etraxfs.c @@ -176,6 +176,11 @@ static const struct etraxfs_gpio_info etraxfs_gpio_artpec3 = { .rw_intr_pins = ARTPEC3_rw_intr_pins, }; +static struct etraxfs_gpio_chip *to_etraxfs(struct gpio_chip *gc) +{ + return container_of(gc, struct etraxfs_gpio_chip, bgc.gc); +} + static unsigned int etraxfs_gpio_chip_to_port(struct gpio_chip *gc) { return gc->label[0] - 'A'; @@ -220,7 +225,8 @@ static unsigned int etraxfs_gpio_to_group_pin(struct etraxfs_gpio_chip *chip, static void etraxfs_gpio_irq_ack(struct irq_data *d) { - struct etraxfs_gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct etraxfs_gpio_chip *chip = + to_etraxfs(irq_data_get_irq_chip_data(d)); struct etraxfs_gpio_block *block = chip->block; unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq); @@ -229,7 +235,8 @@ static void etraxfs_gpio_irq_ack(struct irq_data *d) static void etraxfs_gpio_irq_mask(struct irq_data *d) { - struct etraxfs_gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct etraxfs_gpio_chip *chip = + to_etraxfs(irq_data_get_irq_chip_data(d)); struct etraxfs_gpio_block *block = chip->block; unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq); @@ -241,7 +248,8 @@ static void etraxfs_gpio_irq_mask(struct irq_data *d) static void etraxfs_gpio_irq_unmask(struct irq_data *d) { - struct etraxfs_gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct etraxfs_gpio_chip *chip = + to_etraxfs(irq_data_get_irq_chip_data(d)); struct etraxfs_gpio_block *block = chip->block; unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq); @@ -253,7 +261,8 @@ static void etraxfs_gpio_irq_unmask(struct irq_data *d) static int etraxfs_gpio_irq_set_type(struct irq_data *d, u32 type) { - struct etraxfs_gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct etraxfs_gpio_chip *chip = + to_etraxfs(irq_data_get_irq_chip_data(d)); struct etraxfs_gpio_block *block = chip->block; unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq); u32 cfg; @@ -289,7 +298,8 @@ static int etraxfs_gpio_irq_set_type(struct irq_data *d, u32 type) static int etraxfs_gpio_irq_request_resources(struct irq_data *d) { - struct etraxfs_gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct etraxfs_gpio_chip *chip = + to_etraxfs(irq_data_get_irq_chip_data(d)); struct etraxfs_gpio_block *block = chip->block; unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq); int ret = -EBUSY; @@ -319,7 +329,8 @@ out: static void etraxfs_gpio_irq_release_resources(struct irq_data *d) { - struct etraxfs_gpio_chip *chip = irq_data_get_irq_chip_data(d); + struct etraxfs_gpio_chip *chip = + to_etraxfs(irq_data_get_irq_chip_data(d)); struct etraxfs_gpio_block *block = chip->block; unsigned int grpirq = etraxfs_gpio_to_group_irq(d->hwirq); diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c index a3f07537fe62..bd5193c67a9c 100644 --- a/drivers/gpio/gpio-generic.c +++ b/drivers/gpio/gpio-generic.c @@ -579,40 +579,20 @@ EXPORT_SYMBOL_GPL(bgpio_init); static void __iomem *bgpio_map(struct platform_device *pdev, const char *name, - resource_size_t sane_sz, - int *err) + resource_size_t sane_sz) { - struct device *dev = &pdev->dev; struct resource *r; - resource_size_t start; resource_size_t sz; - void __iomem *ret; - - *err = 0; r = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); if (!r) return NULL; sz = resource_size(r); - if (sz != sane_sz) { - *err = -EINVAL; - return NULL; - } - - start = r->start; - if (!devm_request_mem_region(dev, start, sz, r->name)) { - *err = -EBUSY; - return NULL; - } - - ret = devm_ioremap(dev, start, sz); - if (!ret) { - *err = -ENOMEM; - return NULL; - } + if (sz != sane_sz) + return IOMEM_ERR_PTR(-EINVAL); - return ret; + return devm_ioremap_resource(&pdev->dev, r); } static int bgpio_pdev_probe(struct platform_device *pdev) @@ -636,25 +616,25 @@ static int bgpio_pdev_probe(struct platform_device *pdev) sz = resource_size(r); - dat = bgpio_map(pdev, "dat", sz, &err); - if (!dat) - return err ? err : -EINVAL; + dat = bgpio_map(pdev, "dat", sz); + if (IS_ERR(dat)) + return PTR_ERR(dat); - set = bgpio_map(pdev, "set", sz, &err); - if (err) - return err; + set = bgpio_map(pdev, "set", sz); + if (IS_ERR(set)) + return PTR_ERR(set); - clr = bgpio_map(pdev, "clr", sz, &err); - if (err) - return err; + clr = bgpio_map(pdev, "clr", sz); + if (IS_ERR(clr)) + return PTR_ERR(clr); - dirout = bgpio_map(pdev, "dirout", sz, &err); - if (err) - return err; + dirout = bgpio_map(pdev, "dirout", sz); + if (IS_ERR(dirout)) + return PTR_ERR(dirout); - dirin = bgpio_map(pdev, "dirin", sz, &err); - if (err) - return err; + dirin = bgpio_map(pdev, "dirin", sz); + if (IS_ERR(dirin)) + return PTR_ERR(dirin); bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL); if (!bgc) diff --git a/drivers/gpio/gpio-it87.c b/drivers/gpio/gpio-it87.c new file mode 100644 index 000000000000..21f6f7c0eb34 --- /dev/null +++ b/drivers/gpio/gpio-it87.c @@ -0,0 +1,411 @@ +/* + * GPIO interface for IT87xx Super I/O chips + * + * Author: Diego Elio Pettenò <flameeyes@flameeyes.eu> + * + * Based on it87_wdt.c by Oliver Schuster + * gpio-it8761e.c by Denis Turischev + * gpio-stmpe.c by Rabin Vincent + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/gpio.h> + +/* Chip Id numbers */ +#define NO_DEV_ID 0xffff +#define IT8728_ID 0x8728 +#define IT8732_ID 0x8732 +#define IT8761_ID 0x8761 + +/* IO Ports */ +#define REG 0x2e +#define VAL 0x2f + +/* Logical device Numbers LDN */ +#define GPIO 0x07 + +/* Configuration Registers and Functions */ +#define LDNREG 0x07 +#define CHIPID 0x20 +#define CHIPREV 0x22 + +/** + * struct it87_gpio - it87-specific GPIO chip + * @chip the underlying gpio_chip structure + * @lock a lock to avoid races between operations + * @io_base base address for gpio ports + * @io_size size of the port rage starting from io_base. + * @output_base Super I/O register address for Output Enable register + * @simple_base Super I/O 'Simple I/O' Enable register + * @simple_size Super IO 'Simple I/O' Enable register size; this is + * required because IT87xx chips might only provide Simple I/O + * switches on a subset of lines, whereas the others keep the + * same status all time. + */ +struct it87_gpio { + struct gpio_chip chip; + spinlock_t lock; + u16 io_base; + u16 io_size; + u8 output_base; + u8 simple_base; + u8 simple_size; +}; + +static struct it87_gpio it87_gpio_chip = { + .lock = __SPIN_LOCK_UNLOCKED(it87_gpio_chip.lock), +}; + +static inline struct it87_gpio *to_it87_gpio(struct gpio_chip *chip) +{ + return container_of(chip, struct it87_gpio, chip); +} + +/* Superio chip access functions; copied from wdt_it87 */ + +static inline int superio_enter(void) +{ + /* + * Try to reserve REG and REG + 1 for exclusive access. + */ + if (!request_muxed_region(REG, 2, KBUILD_MODNAME)) + return -EBUSY; + + outb(0x87, REG); + outb(0x01, REG); + outb(0x55, REG); + outb(0x55, REG); + return 0; +} + +static inline void superio_exit(void) +{ + outb(0x02, REG); + outb(0x02, VAL); + release_region(REG, 2); +} + +static inline void superio_select(int ldn) +{ + outb(LDNREG, REG); + outb(ldn, VAL); +} + +static inline int superio_inb(int reg) +{ + outb(reg, REG); + return inb(VAL); +} + +static inline void superio_outb(int val, int reg) +{ + outb(reg, REG); + outb(val, VAL); +} + +static inline int superio_inw(int reg) +{ + int val; + + outb(reg++, REG); + val = inb(VAL) << 8; + outb(reg, REG); + val |= inb(VAL); + return val; +} + +static inline void superio_outw(int val, int reg) +{ + outb(reg++, REG); + outb(val >> 8, VAL); + outb(reg, REG); + outb(val, VAL); +} + +static inline void superio_set_mask(int mask, int reg) +{ + u8 curr_val = superio_inb(reg); + u8 new_val = curr_val | mask; + + if (curr_val != new_val) + superio_outb(new_val, reg); +} + +static inline void superio_clear_mask(int mask, int reg) +{ + u8 curr_val = superio_inb(reg); + u8 new_val = curr_val & ~mask; + + if (curr_val != new_val) + superio_outb(new_val, reg); +} + +static int it87_gpio_request(struct gpio_chip *chip, unsigned gpio_num) +{ + u8 mask, group; + int rc = 0; + struct it87_gpio *it87_gpio = to_it87_gpio(chip); + + mask = 1 << (gpio_num % 8); + group = (gpio_num / 8); + + spin_lock(&it87_gpio->lock); + + rc = superio_enter(); + if (rc) + goto exit; + + /* not all the IT87xx chips support Simple I/O and not all of + * them allow all the lines to be set/unset to Simple I/O. + */ + if (group < it87_gpio->simple_size) + superio_set_mask(mask, group + it87_gpio->simple_base); + + /* clear output enable, setting the pin to input, as all the + * newly-exported GPIO interfaces are set to input. + */ + superio_clear_mask(mask, group + it87_gpio->output_base); + + superio_exit(); + +exit: + spin_unlock(&it87_gpio->lock); + return rc; +} + +static int it87_gpio_get(struct gpio_chip *chip, unsigned gpio_num) +{ + u16 reg; + u8 mask; + struct it87_gpio *it87_gpio = to_it87_gpio(chip); + + mask = 1 << (gpio_num % 8); + reg = (gpio_num / 8) + it87_gpio->io_base; + + return !!(inb(reg) & mask); +} + +static int it87_gpio_direction_in(struct gpio_chip *chip, unsigned gpio_num) +{ + u8 mask, group; + int rc = 0; + struct it87_gpio *it87_gpio = to_it87_gpio(chip); + + mask = 1 << (gpio_num % 8); + group = (gpio_num / 8); + + spin_lock(&it87_gpio->lock); + + rc = superio_enter(); + if (rc) + goto exit; + + /* clear the output enable bit */ + superio_clear_mask(mask, group + it87_gpio->output_base); + + superio_exit(); + +exit: + spin_unlock(&it87_gpio->lock); + return rc; +} + +static void it87_gpio_set(struct gpio_chip *chip, + unsigned gpio_num, int val) +{ + u8 mask, curr_vals; + u16 reg; + struct it87_gpio *it87_gpio = to_it87_gpio(chip); + + mask = 1 << (gpio_num % 8); + reg = (gpio_num / 8) + it87_gpio->io_base; + + curr_vals = inb(reg); + if (val) + outb(curr_vals | mask, reg); + else + outb(curr_vals & ~mask, reg); +} + +static int it87_gpio_direction_out(struct gpio_chip *chip, + unsigned gpio_num, int val) +{ + u8 mask, group; + int rc = 0; + struct it87_gpio *it87_gpio = to_it87_gpio(chip); + + mask = 1 << (gpio_num % 8); + group = (gpio_num / 8); + + spin_lock(&it87_gpio->lock); + + rc = superio_enter(); + if (rc) + goto exit; + + /* set the output enable bit */ + superio_set_mask(mask, group + it87_gpio->output_base); + + it87_gpio_set(chip, gpio_num, val); + + superio_exit(); + +exit: + spin_unlock(&it87_gpio->lock); + return rc; +} + +static struct gpio_chip it87_template_chip = { + .label = KBUILD_MODNAME, + .owner = THIS_MODULE, + .request = it87_gpio_request, + .get = it87_gpio_get, + .direction_input = it87_gpio_direction_in, + .set = it87_gpio_set, + .direction_output = it87_gpio_direction_out, + .base = -1 +}; + +static int __init it87_gpio_init(void) +{ + int rc = 0, i; + u16 chip_type; + u8 chip_rev, gpio_ba_reg; + char *labels, **labels_table; + + struct it87_gpio *it87_gpio = &it87_gpio_chip; + + rc = superio_enter(); + if (rc) + return rc; + + chip_type = superio_inw(CHIPID); + chip_rev = superio_inb(CHIPREV) & 0x0f; + superio_exit(); + + it87_gpio->chip = it87_template_chip; + + switch (chip_type) { + case IT8728_ID: + case IT8732_ID: + gpio_ba_reg = 0x62; + it87_gpio->io_size = 8; + it87_gpio->output_base = 0xc8; + it87_gpio->simple_base = 0xc0; + it87_gpio->simple_size = 5; + it87_gpio->chip.ngpio = 64; + break; + case IT8761_ID: + gpio_ba_reg = 0x60; + it87_gpio->io_size = 4; + it87_gpio->output_base = 0xf0; + it87_gpio->simple_size = 0; + it87_gpio->chip.ngpio = 16; + break; + case NO_DEV_ID: + pr_err("no device\n"); + return -ENODEV; + default: + pr_err("Unknown Chip found, Chip %04x Revision %x\n", + chip_type, chip_rev); + return -ENODEV; + } + + rc = superio_enter(); + if (rc) + return rc; + + superio_select(GPIO); + + /* fetch GPIO base address */ + it87_gpio->io_base = superio_inw(gpio_ba_reg); + + superio_exit(); + + pr_info("Found Chip IT%04x rev %x. %u GPIO lines starting at %04xh\n", + chip_type, chip_rev, it87_gpio->chip.ngpio, + it87_gpio->io_base); + + if (!request_region(it87_gpio->io_base, it87_gpio->io_size, + KBUILD_MODNAME)) + return -EBUSY; + + /* Set up aliases for the GPIO connection. + * + * ITE documentation for recent chips such as the IT8728F + * refers to the GPIO lines as GPxy, with a coordinates system + * where x is the GPIO group (starting from 1) and y is the + * bit within the group. + * + * By creating these aliases, we make it easier to understand + * to which GPIO pin we're referring to. + */ + labels = kcalloc(it87_gpio->chip.ngpio, sizeof("it87_gpXY"), + GFP_KERNEL); + labels_table = kcalloc(it87_gpio->chip.ngpio, sizeof(const char *), + GFP_KERNEL); + + if (!labels || !labels_table) { + rc = -ENOMEM; + goto labels_free; + } + + for (i = 0; i < it87_gpio->chip.ngpio; i++) { + char *label = &labels[i * sizeof("it87_gpXY")]; + + sprintf(label, "it87_gp%u%u", 1+(i/8), i%8); + labels_table[i] = label; + } + + it87_gpio->chip.names = (const char *const*)labels_table; + + rc = gpiochip_add(&it87_gpio->chip); + if (rc) + goto labels_free; + + return 0; + +labels_free: + kfree(labels_table); + kfree(labels); + release_region(it87_gpio->io_base, it87_gpio->io_size); + return rc; +} + +static void __exit it87_gpio_exit(void) +{ + struct it87_gpio *it87_gpio = &it87_gpio_chip; + + gpiochip_remove(&it87_gpio->chip); + release_region(it87_gpio->io_base, it87_gpio->io_size); + kfree(it87_gpio->chip.names[0]); + kfree(it87_gpio->chip.names); +} + +module_init(it87_gpio_init); +module_exit(it87_gpio_exit); + +MODULE_AUTHOR("Diego Elio Pettenò <flameeyes@flameeyes.eu>"); +MODULE_DESCRIPTION("GPIO interface for IT87xx Super I/O chips"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpio/gpio-it8761e.c b/drivers/gpio/gpio-it8761e.c deleted file mode 100644 index 30a8f24c92c5..000000000000 --- a/drivers/gpio/gpio-it8761e.c +++ /dev/null @@ -1,230 +0,0 @@ -/* - * GPIO interface for IT8761E Super I/O chip - * - * Author: Denis Turischev <denis@compulab.co.il> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License 2 as published - * by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/errno.h> -#include <linux/ioport.h> - -#include <linux/gpio.h> - -#define SIO_CHIP_ID 0x8761 -#define CHIP_ID_HIGH_BYTE 0x20 -#define CHIP_ID_LOW_BYTE 0x21 - -static u8 ports[2] = { 0x2e, 0x4e }; -static u8 port; - -static DEFINE_SPINLOCK(sio_lock); - -#define GPIO_NAME "it8761-gpio" -#define GPIO_BA_HIGH_BYTE 0x60 -#define GPIO_BA_LOW_BYTE 0x61 -#define GPIO_IOSIZE 4 -#define GPIO1X_IO 0xf0 -#define GPIO2X_IO 0xf1 - -static u16 gpio_ba; - -static u8 read_reg(u8 addr, u8 port) -{ - outb(addr, port); - return inb(port + 1); -} - -static void write_reg(u8 data, u8 addr, u8 port) -{ - outb(addr, port); - outb(data, port + 1); -} - -static void enter_conf_mode(u8 port) -{ - outb(0x87, port); - outb(0x61, port); - outb(0x55, port); - outb((port == 0x2e) ? 0x55 : 0xaa, port); -} - -static void exit_conf_mode(u8 port) -{ - outb(0x2, port); - outb(0x2, port + 1); -} - -static void enter_gpio_mode(u8 port) -{ - write_reg(0x2, 0x7, port); -} - -static int it8761e_gpio_get(struct gpio_chip *gc, unsigned gpio_num) -{ - u16 reg; - u8 bit; - - bit = gpio_num % 8; - reg = (gpio_num >= 8) ? gpio_ba + 1 : gpio_ba; - - return !!(inb(reg) & (1 << bit)); -} - -static int it8761e_gpio_direction_in(struct gpio_chip *gc, unsigned gpio_num) -{ - u8 curr_dirs; - u8 io_reg, bit; - - bit = gpio_num % 8; - io_reg = (gpio_num >= 8) ? GPIO2X_IO : GPIO1X_IO; - - spin_lock(&sio_lock); - - enter_conf_mode(port); - enter_gpio_mode(port); - - curr_dirs = read_reg(io_reg, port); - - if (curr_dirs & (1 << bit)) - write_reg(curr_dirs & ~(1 << bit), io_reg, port); - - exit_conf_mode(port); - - spin_unlock(&sio_lock); - return 0; -} - -static void it8761e_gpio_set(struct gpio_chip *gc, - unsigned gpio_num, int val) -{ - u8 curr_vals, bit; - u16 reg; - - bit = gpio_num % 8; - reg = (gpio_num >= 8) ? gpio_ba + 1 : gpio_ba; - - spin_lock(&sio_lock); - - curr_vals = inb(reg); - if (val) - outb(curr_vals | (1 << bit), reg); - else - outb(curr_vals & ~(1 << bit), reg); - - spin_unlock(&sio_lock); -} - -static int it8761e_gpio_direction_out(struct gpio_chip *gc, - unsigned gpio_num, int val) -{ - u8 curr_dirs, io_reg, bit; - - bit = gpio_num % 8; - io_reg = (gpio_num >= 8) ? GPIO2X_IO : GPIO1X_IO; - - it8761e_gpio_set(gc, gpio_num, val); - - spin_lock(&sio_lock); - - enter_conf_mode(port); - enter_gpio_mode(port); - - curr_dirs = read_reg(io_reg, port); - - if (!(curr_dirs & (1 << bit))) - write_reg(curr_dirs | (1 << bit), io_reg, port); - - exit_conf_mode(port); - - spin_unlock(&sio_lock); - return 0; -} - -static struct gpio_chip it8761e_gpio_chip = { - .label = GPIO_NAME, - .owner = THIS_MODULE, - .get = it8761e_gpio_get, - .direction_input = it8761e_gpio_direction_in, - .set = it8761e_gpio_set, - .direction_output = it8761e_gpio_direction_out, -}; - -static int __init it8761e_gpio_init(void) -{ - int i, id, err; - - /* chip and port detection */ - for (i = 0; i < ARRAY_SIZE(ports); i++) { - spin_lock(&sio_lock); - enter_conf_mode(ports[i]); - - id = (read_reg(CHIP_ID_HIGH_BYTE, ports[i]) << 8) + - read_reg(CHIP_ID_LOW_BYTE, ports[i]); - - exit_conf_mode(ports[i]); - spin_unlock(&sio_lock); - - if (id == SIO_CHIP_ID) { - port = ports[i]; - break; - } - } - - if (!port) - return -ENODEV; - - /* fetch GPIO base address */ - enter_conf_mode(port); - enter_gpio_mode(port); - gpio_ba = (read_reg(GPIO_BA_HIGH_BYTE, port) << 8) + - read_reg(GPIO_BA_LOW_BYTE, port); - exit_conf_mode(port); - - if (!request_region(gpio_ba, GPIO_IOSIZE, GPIO_NAME)) - return -EBUSY; - - it8761e_gpio_chip.base = -1; - it8761e_gpio_chip.ngpio = 16; - - err = gpiochip_add(&it8761e_gpio_chip); - if (err < 0) - goto gpiochip_add_err; - - return 0; - -gpiochip_add_err: - release_region(gpio_ba, GPIO_IOSIZE); - gpio_ba = 0; - return err; -} - -static void __exit it8761e_gpio_exit(void) -{ - if (gpio_ba) { - gpiochip_remove(&it8761e_gpio_chip); - release_region(gpio_ba, GPIO_IOSIZE); - gpio_ba = 0; - } -} -module_init(it8761e_gpio_init); -module_exit(it8761e_gpio_exit); - -MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>"); -MODULE_DESCRIPTION("GPIO interface for IT8761E Super I/O chip"); -MODULE_LICENSE("GPL"); diff --git a/drivers/gpio/gpio-lpc18xx.c b/drivers/gpio/gpio-lpc18xx.c index eb68603136b0..e39dcb0af8ae 100644 --- a/drivers/gpio/gpio-lpc18xx.c +++ b/drivers/gpio/gpio-lpc18xx.c @@ -36,16 +36,6 @@ static inline struct lpc18xx_gpio_chip *to_lpc18xx_gpio(struct gpio_chip *chip) return container_of(chip, struct lpc18xx_gpio_chip, gpio); } -static int lpc18xx_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(offset); -} - -static void lpc18xx_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(offset); -} - static void lpc18xx_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct lpc18xx_gpio_chip *gc = to_lpc18xx_gpio(chip); @@ -95,8 +85,8 @@ static int lpc18xx_gpio_direction_output(struct gpio_chip *chip, static struct gpio_chip lpc18xx_chip = { .label = "lpc18xx/43xx-gpio", - .request = lpc18xx_gpio_request, - .free = lpc18xx_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .direction_input = lpc18xx_gpio_direction_input, .direction_output = lpc18xx_gpio_direction_output, .set = lpc18xx_gpio_set, diff --git a/drivers/gpio/gpio-max730x.c b/drivers/gpio/gpio-max730x.c index 18ab89e20806..0f57d2d248ec 100644 --- a/drivers/gpio/gpio-max730x.c +++ b/drivers/gpio/gpio-max730x.c @@ -236,7 +236,6 @@ int __max730x_remove(struct device *dev) ts->write(dev, 0x04, 0x00); gpiochip_remove(&ts->chip); mutex_destroy(&ts->lock); - kfree(ts); return 0; } EXPORT_SYMBOL_GPL(__max730x_remove); diff --git a/drivers/gpio/gpio-moxart.c b/drivers/gpio/gpio-moxart.c index abd8676ce2b6..d3355a6dc9b1 100644 --- a/drivers/gpio/gpio-moxart.c +++ b/drivers/gpio/gpio-moxart.c @@ -29,16 +29,6 @@ #define GPIO_DATA_IN 0x04 #define GPIO_PIN_DIRECTION 0x08 -static int moxart_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(offset); -} - -static void moxart_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(offset); -} - static int moxart_gpio_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -66,8 +56,8 @@ static int moxart_gpio_probe(struct platform_device *pdev) } bgc->gc.label = "moxart-gpio"; - bgc->gc.request = moxart_gpio_request; - bgc->gc.free = moxart_gpio_free; + bgc->gc.request = gpiochip_generic_request; + bgc->gc.free = gpiochip_generic_free; bgc->data = bgc->read_reg(bgc->reg_set); bgc->gc.base = 0; bgc->gc.ngpio = 32; diff --git a/drivers/gpio/gpio-msm-v2.c b/drivers/gpio/gpio-msm-v2.c deleted file mode 100644 index 4b4222145f10..000000000000 --- a/drivers/gpio/gpio-msm-v2.c +++ /dev/null @@ -1,453 +0,0 @@ -/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - */ -#define pr_fmt(fmt) "%s: " fmt, __func__ - -#include <linux/bitmap.h> -#include <linux/bitops.h> -#include <linux/err.h> -#include <linux/gpio.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/irqchip/chained_irq.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> -#include <linux/module.h> -#include <linux/of_address.h> -#include <linux/platform_device.h> -#include <linux/spinlock.h> -#include <linux/slab.h> - -#define MAX_NR_GPIO 300 - -/* Bits of interest in the GPIO_IN_OUT register. - */ -enum { - GPIO_IN = 0, - GPIO_OUT = 1 -}; - -/* Bits of interest in the GPIO_INTR_STATUS register. - */ -enum { - INTR_STATUS = 0, -}; - -/* Bits of interest in the GPIO_CFG register. - */ -enum { - GPIO_OE = 9, -}; - -/* Bits of interest in the GPIO_INTR_CFG register. - * When a GPIO triggers, two separate decisions are made, controlled - * by two separate flags. - * - * - First, INTR_RAW_STATUS_EN controls whether or not the GPIO_INTR_STATUS - * register for that GPIO will be updated to reflect the triggering of that - * gpio. If this bit is 0, this register will not be updated. - * - Second, INTR_ENABLE controls whether an interrupt is triggered. - * - * If INTR_ENABLE is set and INTR_RAW_STATUS_EN is NOT set, an interrupt - * can be triggered but the status register will not reflect it. - */ -enum { - INTR_ENABLE = 0, - INTR_POL_CTL = 1, - INTR_DECT_CTL = 2, - INTR_RAW_STATUS_EN = 3, -}; - -/* Codes of interest in GPIO_INTR_CFG_SU. - */ -enum { - TARGET_PROC_SCORPION = 4, - TARGET_PROC_NONE = 7, -}; - -/** - * struct msm_gpio_dev: the MSM8660 SoC GPIO device structure - * - * @enabled_irqs: a bitmap used to optimize the summary-irq handler. By - * keeping track of which gpios are unmasked as irq sources, we avoid - * having to do readl calls on hundreds of iomapped registers each time - * the summary interrupt fires in order to locate the active interrupts. - * - * @wake_irqs: a bitmap for tracking which interrupt lines are enabled - * as wakeup sources. When the device is suspended, interrupts which are - * not wakeup sources are disabled. - * - * @dual_edge_irqs: a bitmap used to track which irqs are configured - * as dual-edge, as this is not supported by the hardware and requires - * some special handling in the driver. - */ -struct msm_gpio_dev { - struct gpio_chip gpio_chip; - DECLARE_BITMAP(enabled_irqs, MAX_NR_GPIO); - DECLARE_BITMAP(wake_irqs, MAX_NR_GPIO); - DECLARE_BITMAP(dual_edge_irqs, MAX_NR_GPIO); - struct irq_domain *domain; - int summary_irq; - void __iomem *msm_tlmm_base; -}; - -static struct msm_gpio_dev msm_gpio; - -#define GPIO_INTR_CFG_SU(gpio) (msm_gpio.msm_tlmm_base + 0x0400 + \ - (0x04 * (gpio))) -#define GPIO_CONFIG(gpio) (msm_gpio.msm_tlmm_base + 0x1000 + \ - (0x10 * (gpio))) -#define GPIO_IN_OUT(gpio) (msm_gpio.msm_tlmm_base + 0x1004 + \ - (0x10 * (gpio))) -#define GPIO_INTR_CFG(gpio) (msm_gpio.msm_tlmm_base + 0x1008 + \ - (0x10 * (gpio))) -#define GPIO_INTR_STATUS(gpio) (msm_gpio.msm_tlmm_base + 0x100c + \ - (0x10 * (gpio))) - -static DEFINE_SPINLOCK(tlmm_lock); - -static inline struct msm_gpio_dev *to_msm_gpio_dev(struct gpio_chip *chip) -{ - return container_of(chip, struct msm_gpio_dev, gpio_chip); -} - -static inline void set_gpio_bits(unsigned n, void __iomem *reg) -{ - writel(readl(reg) | n, reg); -} - -static inline void clear_gpio_bits(unsigned n, void __iomem *reg) -{ - writel(readl(reg) & ~n, reg); -} - -static int msm_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - return readl(GPIO_IN_OUT(offset)) & BIT(GPIO_IN); -} - -static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int val) -{ - writel(val ? BIT(GPIO_OUT) : 0, GPIO_IN_OUT(offset)); -} - -static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -{ - unsigned long irq_flags; - - spin_lock_irqsave(&tlmm_lock, irq_flags); - clear_gpio_bits(BIT(GPIO_OE), GPIO_CONFIG(offset)); - spin_unlock_irqrestore(&tlmm_lock, irq_flags); - return 0; -} - -static int msm_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, - int val) -{ - unsigned long irq_flags; - - spin_lock_irqsave(&tlmm_lock, irq_flags); - msm_gpio_set(chip, offset, val); - set_gpio_bits(BIT(GPIO_OE), GPIO_CONFIG(offset)); - spin_unlock_irqrestore(&tlmm_lock, irq_flags); - return 0; -} - -static int msm_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return 0; -} - -static void msm_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - return; -} - -static int msm_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct msm_gpio_dev *g_dev = to_msm_gpio_dev(chip); - struct irq_domain *domain = g_dev->domain; - - return irq_create_mapping(domain, offset); -} - -/* For dual-edge interrupts in software, since the hardware has no - * such support: - * - * At appropriate moments, this function may be called to flip the polarity - * settings of both-edge irq lines to try and catch the next edge. - * - * The attempt is considered successful if: - * - the status bit goes high, indicating that an edge was caught, or - * - the input value of the gpio doesn't change during the attempt. - * If the value changes twice during the process, that would cause the first - * test to fail but would force the second, as two opposite - * transitions would cause a detection no matter the polarity setting. - * - * The do-loop tries to sledge-hammer closed the timing hole between - * the initial value-read and the polarity-write - if the line value changes - * during that window, an interrupt is lost, the new polarity setting is - * incorrect, and the first success test will fail, causing a retry. - * - * Algorithm comes from Google's msmgpio driver, see mach-msm/gpio.c. - */ -static void msm_gpio_update_dual_edge_pos(unsigned gpio) -{ - int loop_limit = 100; - unsigned val, val2, intstat; - - do { - val = readl(GPIO_IN_OUT(gpio)) & BIT(GPIO_IN); - if (val) - clear_gpio_bits(BIT(INTR_POL_CTL), GPIO_INTR_CFG(gpio)); - else - set_gpio_bits(BIT(INTR_POL_CTL), GPIO_INTR_CFG(gpio)); - val2 = readl(GPIO_IN_OUT(gpio)) & BIT(GPIO_IN); - intstat = readl(GPIO_INTR_STATUS(gpio)) & BIT(INTR_STATUS); - if (intstat || val == val2) - return; - } while (loop_limit-- > 0); - pr_err("%s: dual-edge irq failed to stabilize, " - "interrupts dropped. %#08x != %#08x\n", - __func__, val, val2); -} - -static void msm_gpio_irq_ack(struct irq_data *d) -{ - int gpio = d->hwirq; - - writel(BIT(INTR_STATUS), GPIO_INTR_STATUS(gpio)); - if (test_bit(gpio, msm_gpio.dual_edge_irqs)) - msm_gpio_update_dual_edge_pos(gpio); -} - -static void msm_gpio_irq_mask(struct irq_data *d) -{ - unsigned long irq_flags; - int gpio = d->hwirq; - - spin_lock_irqsave(&tlmm_lock, irq_flags); - writel(TARGET_PROC_NONE, GPIO_INTR_CFG_SU(gpio)); - clear_gpio_bits(BIT(INTR_RAW_STATUS_EN) | BIT(INTR_ENABLE), GPIO_INTR_CFG(gpio)); - __clear_bit(gpio, msm_gpio.enabled_irqs); - spin_unlock_irqrestore(&tlmm_lock, irq_flags); -} - -static void msm_gpio_irq_unmask(struct irq_data *d) -{ - unsigned long irq_flags; - int gpio = d->hwirq; - - spin_lock_irqsave(&tlmm_lock, irq_flags); - __set_bit(gpio, msm_gpio.enabled_irqs); - set_gpio_bits(BIT(INTR_RAW_STATUS_EN) | BIT(INTR_ENABLE), GPIO_INTR_CFG(gpio)); - writel(TARGET_PROC_SCORPION, GPIO_INTR_CFG_SU(gpio)); - spin_unlock_irqrestore(&tlmm_lock, irq_flags); -} - -static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type) -{ - unsigned long irq_flags; - int gpio = d->hwirq; - uint32_t bits; - - spin_lock_irqsave(&tlmm_lock, irq_flags); - - bits = readl(GPIO_INTR_CFG(gpio)); - - if (flow_type & IRQ_TYPE_EDGE_BOTH) { - bits |= BIT(INTR_DECT_CTL); - irq_set_handler_locked(d, handle_edge_irq); - if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) - __set_bit(gpio, msm_gpio.dual_edge_irqs); - else - __clear_bit(gpio, msm_gpio.dual_edge_irqs); - } else { - bits &= ~BIT(INTR_DECT_CTL); - irq_set_handler_locked(d, handle_level_irq); - __clear_bit(gpio, msm_gpio.dual_edge_irqs); - } - - if (flow_type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_LEVEL_HIGH)) - bits |= BIT(INTR_POL_CTL); - else - bits &= ~BIT(INTR_POL_CTL); - - writel(bits, GPIO_INTR_CFG(gpio)); - - if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) - msm_gpio_update_dual_edge_pos(gpio); - - spin_unlock_irqrestore(&tlmm_lock, irq_flags); - - return 0; -} - -/* - * When the summary IRQ is raised, any number of GPIO lines may be high. - * It is the job of the summary handler to find all those GPIO lines - * which have been set as summary IRQ lines and which are triggered, - * and to call their interrupt handlers. - */ -static void msm_summary_irq_handler(struct irq_desc *desc) -{ - unsigned long i; - struct irq_chip *chip = irq_desc_get_chip(desc); - - chained_irq_enter(chip, desc); - - for_each_set_bit(i, msm_gpio.enabled_irqs, MAX_NR_GPIO) { - if (readl(GPIO_INTR_STATUS(i)) & BIT(INTR_STATUS)) - generic_handle_irq(irq_find_mapping(msm_gpio.domain, - i)); - } - - chained_irq_exit(chip, desc); -} - -static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on) -{ - int gpio = d->hwirq; - - if (on) { - if (bitmap_empty(msm_gpio.wake_irqs, MAX_NR_GPIO)) - irq_set_irq_wake(msm_gpio.summary_irq, 1); - set_bit(gpio, msm_gpio.wake_irqs); - } else { - clear_bit(gpio, msm_gpio.wake_irqs); - if (bitmap_empty(msm_gpio.wake_irqs, MAX_NR_GPIO)) - irq_set_irq_wake(msm_gpio.summary_irq, 0); - } - - return 0; -} - -static struct irq_chip msm_gpio_irq_chip = { - .name = "msmgpio", - .irq_mask = msm_gpio_irq_mask, - .irq_unmask = msm_gpio_irq_unmask, - .irq_ack = msm_gpio_irq_ack, - .irq_set_type = msm_gpio_irq_set_type, - .irq_set_wake = msm_gpio_irq_set_wake, -}; - -static struct lock_class_key msm_gpio_lock_class; - -static int msm_gpio_irq_domain_map(struct irq_domain *d, unsigned int irq, - irq_hw_number_t hwirq) -{ - irq_set_lockdep_class(irq, &msm_gpio_lock_class); - irq_set_chip_and_handler(irq, &msm_gpio_irq_chip, - handle_level_irq); - - return 0; -} - -static const struct irq_domain_ops msm_gpio_irq_domain_ops = { - .xlate = irq_domain_xlate_twocell, - .map = msm_gpio_irq_domain_map, -}; - -static int msm_gpio_probe(struct platform_device *pdev) -{ - int ret, ngpio; - struct resource *res; - - if (of_property_read_u32(pdev->dev.of_node, "ngpio", &ngpio)) { - dev_err(&pdev->dev, "%s: ngpio property missing\n", __func__); - return -EINVAL; - } - - if (ngpio > MAX_NR_GPIO) - WARN(1, "ngpio exceeds the MAX_NR_GPIO. Increase MAX_NR_GPIO\n"); - - bitmap_zero(msm_gpio.enabled_irqs, MAX_NR_GPIO); - bitmap_zero(msm_gpio.wake_irqs, MAX_NR_GPIO); - bitmap_zero(msm_gpio.dual_edge_irqs, MAX_NR_GPIO); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - msm_gpio.msm_tlmm_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(msm_gpio.msm_tlmm_base)) - return PTR_ERR(msm_gpio.msm_tlmm_base); - - msm_gpio.gpio_chip.ngpio = ngpio; - msm_gpio.gpio_chip.label = pdev->name; - msm_gpio.gpio_chip.dev = &pdev->dev; - msm_gpio.gpio_chip.base = 0; - msm_gpio.gpio_chip.direction_input = msm_gpio_direction_input; - msm_gpio.gpio_chip.direction_output = msm_gpio_direction_output; - msm_gpio.gpio_chip.get = msm_gpio_get; - msm_gpio.gpio_chip.set = msm_gpio_set; - msm_gpio.gpio_chip.to_irq = msm_gpio_to_irq; - msm_gpio.gpio_chip.request = msm_gpio_request; - msm_gpio.gpio_chip.free = msm_gpio_free; - - ret = gpiochip_add(&msm_gpio.gpio_chip); - if (ret < 0) { - dev_err(&pdev->dev, "gpiochip_add failed with error %d\n", ret); - return ret; - } - - msm_gpio.summary_irq = platform_get_irq(pdev, 0); - if (msm_gpio.summary_irq < 0) { - dev_err(&pdev->dev, "No Summary irq defined for msmgpio\n"); - return msm_gpio.summary_irq; - } - - msm_gpio.domain = irq_domain_add_linear(pdev->dev.of_node, ngpio, - &msm_gpio_irq_domain_ops, - &msm_gpio); - if (!msm_gpio.domain) - return -ENODEV; - - irq_set_chained_handler(msm_gpio.summary_irq, msm_summary_irq_handler); - - return 0; -} - -static const struct of_device_id msm_gpio_of_match[] = { - { .compatible = "qcom,msm-gpio", }, - { }, -}; -MODULE_DEVICE_TABLE(of, msm_gpio_of_match); - -static int msm_gpio_remove(struct platform_device *dev) -{ - gpiochip_remove(&msm_gpio.gpio_chip); - - irq_set_handler(msm_gpio.summary_irq, NULL); - - return 0; -} - -static struct platform_driver msm_gpio_driver = { - .probe = msm_gpio_probe, - .remove = msm_gpio_remove, - .driver = { - .name = "msmgpio", - .of_match_table = msm_gpio_of_match, - }, -}; - -module_platform_driver(msm_gpio_driver) - -MODULE_AUTHOR("Gregory Bean <gbean@codeaurora.org>"); -MODULE_DESCRIPTION("Driver for Qualcomm MSM TLMMv2 SoC GPIOs"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:msmgpio"); diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index df418b81456d..d428b97876c5 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -185,16 +185,6 @@ static void __iomem *mvebu_gpioreg_level_mask(struct mvebu_gpio_chip *mvchip) * Functions implementing the gpio_chip methods */ -static int mvebu_gpio_request(struct gpio_chip *chip, unsigned pin) -{ - return pinctrl_request_gpio(chip->base + pin); -} - -static void mvebu_gpio_free(struct gpio_chip *chip, unsigned pin) -{ - pinctrl_free_gpio(chip->base + pin); -} - static void mvebu_gpio_set(struct gpio_chip *chip, unsigned pin, int value) { struct mvebu_gpio_chip *mvchip = @@ -709,8 +699,8 @@ static int mvebu_gpio_probe(struct platform_device *pdev) mvchip->soc_variant = soc_variant; mvchip->chip.label = dev_name(&pdev->dev); mvchip->chip.dev = &pdev->dev; - mvchip->chip.request = mvebu_gpio_request; - mvchip->chip.free = mvebu_gpio_free; + mvchip->chip.request = gpiochip_generic_request; + mvchip->chip.free = gpiochip_generic_free; mvchip->chip.direction_input = mvebu_gpio_direction_input; mvchip->chip.get = mvebu_gpio_get; mvchip->chip.direction_output = mvebu_gpio_direction_output; diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 5236db161e76..56d2d026e62e 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -51,7 +51,7 @@ struct gpio_regs { struct gpio_bank { struct list_head node; void __iomem *base; - u16 irq; + int irq; u32 non_wakeup_gpios; u32 enabled_non_wakeup_gpios; struct gpio_regs context; @@ -59,6 +59,7 @@ struct gpio_bank { u32 level_mask; u32 toggle_mask; raw_spinlock_t lock; + raw_spinlock_t wa_lock; struct gpio_chip chip; struct clk *dbck; u32 mod_usage; @@ -496,9 +497,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH))) return -EINVAL; - if (!BANK_USED(bank)) - pm_runtime_get_sync(bank->dev); - raw_spin_lock_irqsave(&bank->lock, flags); retval = omap_set_gpio_triggering(bank, offset, type); if (retval) { @@ -521,8 +519,6 @@ static int omap_gpio_irq_type(struct irq_data *d, unsigned type) return 0; error: - if (!BANK_USED(bank)) - pm_runtime_put(bank->dev); return retval; } @@ -654,8 +650,13 @@ static int omap_gpio_wake_enable(struct irq_data *d, unsigned int enable) { struct gpio_bank *bank = omap_irq_data_get_bank(d); unsigned offset = d->hwirq; + int ret; + + ret = omap_set_gpio_wakeup(bank, offset, enable); + if (!ret) + ret = irq_set_irq_wake(bank->irq, enable); - return omap_set_gpio_wakeup(bank, offset, enable); + return ret; } static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) @@ -709,26 +710,21 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) * line's interrupt handler has been run, we may miss some nested * interrupts. */ -static void omap_gpio_irq_handler(struct irq_desc *desc) +static irqreturn_t omap_gpio_irq_handler(int irq, void *gpiobank) { void __iomem *isr_reg = NULL; u32 isr; unsigned int bit; - struct gpio_bank *bank; - int unmasked = 0; - struct irq_chip *irqchip = irq_desc_get_chip(desc); - struct gpio_chip *chip = irq_desc_get_handler_data(desc); + struct gpio_bank *bank = gpiobank; + unsigned long wa_lock_flags; unsigned long lock_flags; - chained_irq_enter(irqchip, desc); - - bank = container_of(chip, struct gpio_bank, chip); isr_reg = bank->base + bank->regs->irqstatus; - pm_runtime_get_sync(bank->dev); - if (WARN_ON(!isr_reg)) goto exit; + pm_runtime_get_sync(bank->dev); + while (1) { u32 isr_saved, level_mask = 0; u32 enabled; @@ -750,13 +746,6 @@ static void omap_gpio_irq_handler(struct irq_desc *desc) raw_spin_unlock_irqrestore(&bank->lock, lock_flags); - /* if there is only edge sensitive GPIO pin interrupts - configured, we could unmask GPIO bank interrupt immediately */ - if (!level_mask && !unmasked) { - unmasked = 1; - chained_irq_exit(irqchip, desc); - } - if (!isr) break; @@ -777,18 +766,18 @@ static void omap_gpio_irq_handler(struct irq_desc *desc) raw_spin_unlock_irqrestore(&bank->lock, lock_flags); + raw_spin_lock_irqsave(&bank->wa_lock, wa_lock_flags); + generic_handle_irq(irq_find_mapping(bank->chip.irqdomain, bit)); + + raw_spin_unlock_irqrestore(&bank->wa_lock, + wa_lock_flags); } } - /* if bank has any level sensitive GPIO pin interrupt - configured, we must unmask the bank interrupt only after - handler(s) are executed in order to avoid spurious bank - interrupt */ exit: - if (!unmasked) - chained_irq_exit(irqchip, desc); pm_runtime_put(bank->dev); + return IRQ_HANDLED; } static unsigned int omap_gpio_irq_startup(struct irq_data *d) @@ -797,9 +786,6 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d) unsigned long flags; unsigned offset = d->hwirq; - if (!BANK_USED(bank)) - pm_runtime_get_sync(bank->dev); - raw_spin_lock_irqsave(&bank->lock, flags); if (!LINE_USED(bank->mod_usage, offset)) @@ -815,8 +801,6 @@ static unsigned int omap_gpio_irq_startup(struct irq_data *d) return 0; err: raw_spin_unlock_irqrestore(&bank->lock, flags); - if (!BANK_USED(bank)) - pm_runtime_put(bank->dev); return -EINVAL; } @@ -835,6 +819,19 @@ static void omap_gpio_irq_shutdown(struct irq_data *d) omap_clear_gpio_debounce(bank, offset); omap_disable_gpio_module(bank, offset); raw_spin_unlock_irqrestore(&bank->lock, flags); +} + +static void omap_gpio_irq_bus_lock(struct irq_data *data) +{ + struct gpio_bank *bank = omap_irq_data_get_bank(data); + + if (!BANK_USED(bank)) + pm_runtime_get_sync(bank->dev); +} + +static void gpio_irq_bus_sync_unlock(struct irq_data *data) +{ + struct gpio_bank *bank = omap_irq_data_get_bank(data); /* * If this is the last IRQ to be freed in the bank, @@ -1132,7 +1129,7 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) } ret = gpiochip_irqchip_add(&bank->chip, irqc, - irq_base, omap_gpio_irq_handler, + irq_base, handle_bad_irq, IRQ_TYPE_NONE); if (ret) { @@ -1141,10 +1138,14 @@ static int omap_gpio_chip_init(struct gpio_bank *bank, struct irq_chip *irqc) return -ENODEV; } - gpiochip_set_chained_irqchip(&bank->chip, irqc, - bank->irq, omap_gpio_irq_handler); + gpiochip_set_chained_irqchip(&bank->chip, irqc, bank->irq, NULL); - return 0; + ret = devm_request_irq(bank->dev, bank->irq, omap_gpio_irq_handler, + 0, dev_name(bank->dev), bank); + if (ret) + gpiochip_remove(&bank->chip); + + return ret; } static const struct of_device_id omap_gpio_match[]; @@ -1183,6 +1184,8 @@ static int omap_gpio_probe(struct platform_device *pdev) irqc->irq_unmask = omap_gpio_unmask_irq, irqc->irq_set_type = omap_gpio_irq_type, irqc->irq_set_wake = omap_gpio_wake_enable, + irqc->irq_bus_lock = omap_gpio_irq_bus_lock, + irqc->irq_bus_sync_unlock = gpio_irq_bus_sync_unlock, irqc->name = dev_name(&pdev->dev); bank->irq = platform_get_irq(pdev, 0); @@ -1224,6 +1227,7 @@ static int omap_gpio_probe(struct platform_device *pdev) bank->set_dataout = omap_set_gpio_dataout_mask; raw_spin_lock_init(&bank->lock); + raw_spin_lock_init(&bank->wa_lock); /* Static mapping, never released */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index 50caeb1ee350..2d4892cc70fb 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -21,6 +21,7 @@ #ifdef CONFIG_OF_GPIO #include <linux/of_platform.h> #endif +#include <linux/acpi.h> #define PCA953X_INPUT 0 #define PCA953X_OUTPUT 1 @@ -42,6 +43,9 @@ #define PCA_INT 0x0100 #define PCA953X_TYPE 0x1000 #define PCA957X_TYPE 0x2000 +#define PCA_TYPE_MASK 0xF000 + +#define PCA_CHIP_TYPE(x) ((x) & PCA_TYPE_MASK) static const struct i2c_device_id pca953x_id[] = { { "pca9505", 40 | PCA953X_TYPE | PCA_INT, }, @@ -67,11 +71,18 @@ static const struct i2c_device_id pca953x_id[] = { { "tca6408", 8 | PCA953X_TYPE | PCA_INT, }, { "tca6416", 16 | PCA953X_TYPE | PCA_INT, }, { "tca6424", 24 | PCA953X_TYPE | PCA_INT, }, + { "tca9539", 16 | PCA953X_TYPE | PCA_INT, }, { "xra1202", 8 | PCA953X_TYPE }, { } }; MODULE_DEVICE_TABLE(i2c, pca953x_id); +static const struct acpi_device_id pca953x_acpi_ids[] = { + { "INT3491", 16 | PCA953X_TYPE | PCA_INT, }, + { } +}; +MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids); + #define MAX_BANK 5 #define BANK_SZ 8 @@ -95,6 +106,7 @@ struct pca953x_chip { struct gpio_chip gpio_chip; const char *const *names; int chip_type; + unsigned long driver_data; }; static inline struct pca953x_chip *to_pca(struct gpio_chip *gc) @@ -517,14 +529,13 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid) } static int pca953x_irq_setup(struct pca953x_chip *chip, - const struct i2c_device_id *id, int irq_base) { struct i2c_client *client = chip->client; int ret, i, offset = 0; if (client->irq && irq_base != -1 - && (id->driver_data & PCA_INT)) { + && (chip->driver_data & PCA_INT)) { switch (chip->chip_type) { case PCA953X_TYPE: @@ -581,12 +592,11 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, #else /* CONFIG_GPIO_PCA953X_IRQ */ static int pca953x_irq_setup(struct pca953x_chip *chip, - const struct i2c_device_id *id, int irq_base) { struct i2c_client *client = chip->client; - if (irq_base != -1 && (id->driver_data & PCA_INT)) + if (irq_base != -1 && (chip->driver_data & PCA_INT)) dev_warn(&client->dev, "interrupt support not compiled in\n"); return 0; @@ -635,11 +645,15 @@ static int device_pca957x_init(struct pca953x_chip *chip, u32 invert) memset(val, 0xFF, NBANK(chip)); else memset(val, 0, NBANK(chip)); - pca953x_write_regs(chip, PCA957X_INVRT, val); + ret = pca953x_write_regs(chip, PCA957X_INVRT, val); + if (ret) + goto out; /* To enable register 6, 7 to control pull up and pull down */ memset(val, 0x02, NBANK(chip)); - pca953x_write_regs(chip, PCA957X_BKEN, val); + ret = pca953x_write_regs(chip, PCA957X_BKEN, val); + if (ret) + goto out; return 0; out: @@ -673,14 +687,26 @@ static int pca953x_probe(struct i2c_client *client, chip->client = client; - chip->chip_type = id->driver_data & (PCA953X_TYPE | PCA957X_TYPE); + if (id) { + chip->driver_data = id->driver_data; + } else { + const struct acpi_device_id *id; + + id = acpi_match_device(pca953x_acpi_ids, &client->dev); + if (!id) + return -ENODEV; + + chip->driver_data = id->driver_data; + } + + chip->chip_type = PCA_CHIP_TYPE(chip->driver_data); mutex_init(&chip->i2c_lock); /* initialize cached registers from their original values. * we can't share this chip with another i2c master. */ - pca953x_setup_gpio(chip, id->driver_data & PCA_GPIO_MASK); + pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK); if (chip->chip_type == PCA953X_TYPE) ret = device_pca953x_init(chip, invert); @@ -693,7 +719,7 @@ static int pca953x_probe(struct i2c_client *client, if (ret) return ret; - ret = pca953x_irq_setup(chip, id, irq_base); + ret = pca953x_irq_setup(chip, irq_base); if (ret) return ret; @@ -765,6 +791,7 @@ static struct i2c_driver pca953x_driver = { .driver = { .name = "pca953x", .of_match_table = pca953x_dt_ids, + .acpi_match_table = ACPI_PTR(pca953x_acpi_ids), }, .probe = pca953x_probe, .remove = pca953x_remove, diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c index 229ef653e0f8..4d4b37676702 100644 --- a/drivers/gpio/gpio-pl061.c +++ b/drivers/gpio/gpio-pl061.c @@ -52,36 +52,12 @@ struct pl061_gpio { void __iomem *base; struct gpio_chip gc; - bool uses_pinctrl; #ifdef CONFIG_PM struct pl061_context_save_regs csave_regs; #endif }; -static int pl061_gpio_request(struct gpio_chip *gc, unsigned offset) -{ - /* - * Map back to global GPIO space and request muxing, the direction - * parameter does not matter for this controller. - */ - struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); - int gpio = gc->base + offset; - - if (chip->uses_pinctrl) - return pinctrl_request_gpio(gpio); - return 0; -} - -static void pl061_gpio_free(struct gpio_chip *gc, unsigned offset) -{ - struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); - int gpio = gc->base + offset; - - if (chip->uses_pinctrl) - pinctrl_free_gpio(gpio); -} - static int pl061_direction_input(struct gpio_chip *gc, unsigned offset) { struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); @@ -152,6 +128,17 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger) if (offset < 0 || offset >= PL061_GPIO_NR) return -EINVAL; + if ((trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) && + (trigger & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))) + { + dev_err(gc->dev, + "trying to configure line %d for both level and edge " + "detection, choose one!\n", + offset); + return -EINVAL; + } + + spin_lock_irqsave(&chip->lock, flags); gpioiev = readb(chip->base + GPIOIEV); @@ -159,23 +146,53 @@ static int pl061_irq_type(struct irq_data *d, unsigned trigger) gpioibe = readb(chip->base + GPIOIBE); if (trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) { + bool polarity = trigger & IRQ_TYPE_LEVEL_HIGH; + + /* Disable edge detection */ + gpioibe &= ~bit; + /* Enable level detection */ gpiois |= bit; - if (trigger & IRQ_TYPE_LEVEL_HIGH) + /* Select polarity */ + if (polarity) gpioiev |= bit; else gpioiev &= ~bit; - } else + irq_set_handler_locked(d, handle_level_irq); + dev_dbg(gc->dev, "line %d: IRQ on %s level\n", + offset, + polarity ? "HIGH" : "LOW"); + } else if ((trigger & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) { + /* Disable level detection */ gpiois &= ~bit; - - if ((trigger & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) - /* Setting this makes GPIOEV be ignored */ + /* Select both edges, setting this makes GPIOEV be ignored */ gpioibe |= bit; - else { + irq_set_handler_locked(d, handle_edge_irq); + dev_dbg(gc->dev, "line %d: IRQ on both edges\n", offset); + } else if ((trigger & IRQ_TYPE_EDGE_RISING) || + (trigger & IRQ_TYPE_EDGE_FALLING)) { + bool rising = trigger & IRQ_TYPE_EDGE_RISING; + + /* Disable level detection */ + gpiois &= ~bit; + /* Clear detection on both edges */ gpioibe &= ~bit; - if (trigger & IRQ_TYPE_EDGE_RISING) + /* Select edge */ + if (rising) gpioiev |= bit; - else if (trigger & IRQ_TYPE_EDGE_FALLING) + else gpioiev &= ~bit; + irq_set_handler_locked(d, handle_edge_irq); + dev_dbg(gc->dev, "line %d: IRQ on %s edge\n", + offset, + rising ? "RISING" : "FALLING"); + } else { + /* No trigger: disable everything */ + gpiois &= ~bit; + gpioibe &= ~bit; + gpioiev &= ~bit; + irq_set_handler_locked(d, handle_bad_irq); + dev_warn(gc->dev, "no trigger selected for line %d\n", + offset); } writeb(gpiois, chip->base + GPIOIS); @@ -198,7 +215,6 @@ static void pl061_irq_handler(struct irq_desc *desc) chained_irq_enter(irqchip, desc); pending = readb(chip->base + GPIOMIS); - writeb(pending, chip->base + GPIOIC); if (pending) { for_each_set_bit(offset, &pending, PL061_GPIO_NR) generic_handle_irq(irq_find_mapping(gc->irqdomain, @@ -234,8 +250,28 @@ static void pl061_irq_unmask(struct irq_data *d) spin_unlock(&chip->lock); } +/** + * pl061_irq_ack() - ACK an edge IRQ + * @d: IRQ data for this IRQ + * + * This gets called from the edge IRQ handler to ACK the edge IRQ + * in the GPIOIC (interrupt-clear) register. For level IRQs this is + * not needed: these go away when the level signal goes away. + */ +static void pl061_irq_ack(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); + u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR); + + spin_lock(&chip->lock); + writeb(mask, chip->base + GPIOIC); + spin_unlock(&chip->lock); +} + static struct irq_chip pl061_irqchip = { .name = "pl061", + .irq_ack = pl061_irq_ack, .irq_mask = pl061_irq_mask, .irq_unmask = pl061_irq_unmask, .irq_set_type = pl061_irq_type, @@ -269,11 +305,11 @@ static int pl061_probe(struct amba_device *adev, const struct amba_id *id) return PTR_ERR(chip->base); spin_lock_init(&chip->lock); - if (of_property_read_bool(dev->of_node, "gpio-ranges")) - chip->uses_pinctrl = true; + if (of_property_read_bool(dev->of_node, "gpio-ranges")) { + chip->gc.request = gpiochip_generic_request; + chip->gc.free = gpiochip_generic_free; + } - chip->gc.request = pl061_gpio_request; - chip->gc.free = pl061_gpio_free; chip->gc.direction_input = pl061_direction_input; chip->gc.direction_output = pl061_direction_output; chip->gc.get = pl061_get_value; @@ -298,7 +334,7 @@ static int pl061_probe(struct amba_device *adev, const struct amba_id *id) } ret = gpiochip_irqchip_add(&chip->gc, &pl061_irqchip, - irq_base, handle_simple_irq, + irq_base, handle_bad_irq, IRQ_TYPE_NONE); if (ret) { dev_info(&adev->dev, "could not add irqchip\n"); diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c index 9c6b96707c9f..76f920173a2f 100644 --- a/drivers/gpio/gpio-sx150x.c +++ b/drivers/gpio/gpio-sx150x.c @@ -160,6 +160,11 @@ static const struct of_device_id sx150x_of_match[] = { }; MODULE_DEVICE_TABLE(of, sx150x_of_match); +struct sx150x_chip *to_sx150x(struct gpio_chip *gc) +{ + return container_of(gc, struct sx150x_chip, gpio_chip); +} + static s32 sx150x_i2c_write(struct i2c_client *client, u8 reg, u8 val) { s32 err = i2c_smbus_write_byte_data(client, reg, val); @@ -296,11 +301,9 @@ static int sx150x_io_output(struct sx150x_chip *chip, unsigned offset, int val) static int sx150x_gpio_get(struct gpio_chip *gc, unsigned offset) { - struct sx150x_chip *chip; + struct sx150x_chip *chip = to_sx150x(gc); int status = -EINVAL; - chip = container_of(gc, struct sx150x_chip, gpio_chip); - if (!offset_is_oscio(chip, offset)) { mutex_lock(&chip->lock); status = sx150x_get_io(chip, offset); @@ -312,9 +315,7 @@ static int sx150x_gpio_get(struct gpio_chip *gc, unsigned offset) static void sx150x_gpio_set(struct gpio_chip *gc, unsigned offset, int val) { - struct sx150x_chip *chip; - - chip = container_of(gc, struct sx150x_chip, gpio_chip); + struct sx150x_chip *chip = to_sx150x(gc); mutex_lock(&chip->lock); if (offset_is_oscio(chip, offset)) @@ -326,11 +327,9 @@ static void sx150x_gpio_set(struct gpio_chip *gc, unsigned offset, int val) static int sx150x_gpio_direction_input(struct gpio_chip *gc, unsigned offset) { - struct sx150x_chip *chip; + struct sx150x_chip *chip = to_sx150x(gc); int status = -EINVAL; - chip = container_of(gc, struct sx150x_chip, gpio_chip); - if (!offset_is_oscio(chip, offset)) { mutex_lock(&chip->lock); status = sx150x_io_input(chip, offset); @@ -343,11 +342,9 @@ static int sx150x_gpio_direction_output(struct gpio_chip *gc, unsigned offset, int val) { - struct sx150x_chip *chip; + struct sx150x_chip *chip = to_sx150x(gc); int status = 0; - chip = container_of(gc, struct sx150x_chip, gpio_chip); - if (!offset_is_oscio(chip, offset)) { mutex_lock(&chip->lock); status = sx150x_io_output(chip, offset, val); @@ -358,7 +355,7 @@ static int sx150x_gpio_direction_output(struct gpio_chip *gc, static void sx150x_irq_mask(struct irq_data *d) { - struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); + struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d)); unsigned n = d->hwirq; chip->irq_masked |= (1 << n); @@ -367,7 +364,7 @@ static void sx150x_irq_mask(struct irq_data *d) static void sx150x_irq_unmask(struct irq_data *d) { - struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); + struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d)); unsigned n = d->hwirq; chip->irq_masked &= ~(1 << n); @@ -376,7 +373,7 @@ static void sx150x_irq_unmask(struct irq_data *d) static int sx150x_irq_set_type(struct irq_data *d, unsigned int flow_type) { - struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); + struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d)); unsigned n, val = 0; if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) @@ -431,14 +428,14 @@ static irqreturn_t sx150x_irq_thread_fn(int irq, void *dev_id) static void sx150x_irq_bus_lock(struct irq_data *d) { - struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); + struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d)); mutex_lock(&chip->lock); } static void sx150x_irq_bus_sync_unlock(struct irq_data *d) { - struct sx150x_chip *chip = irq_data_get_irq_chip_data(d); + struct sx150x_chip *chip = to_sx150x(irq_data_get_irq_chip_data(d)); unsigned n; if (chip->irq_update == NO_UPDATE_PENDING) diff --git a/drivers/gpio/gpio-tb10x.c b/drivers/gpio/gpio-tb10x.c index 12c99d969b98..4356e6c20fc5 100644 --- a/drivers/gpio/gpio-tb10x.c +++ b/drivers/gpio/gpio-tb10x.c @@ -138,16 +138,6 @@ static int tb10x_gpio_direction_out(struct gpio_chip *chip, return 0; } -static int tb10x_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void tb10x_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int tb10x_gpio_to_irq(struct gpio_chip *chip, unsigned offset) { struct tb10x_gpio *tb10x_gpio = to_tb10x_gpio(chip); @@ -213,8 +203,8 @@ static int tb10x_gpio_probe(struct platform_device *pdev) tb10x_gpio->gc.get = tb10x_gpio_get; tb10x_gpio->gc.direction_output = tb10x_gpio_direction_out; tb10x_gpio->gc.set = tb10x_gpio_set; - tb10x_gpio->gc.request = tb10x_gpio_request; - tb10x_gpio->gc.free = tb10x_gpio_free; + tb10x_gpio->gc.request = gpiochip_generic_request; + tb10x_gpio->gc.free = gpiochip_generic_free; tb10x_gpio->gc.base = -1; tb10x_gpio->gc.ngpio = ngpio; tb10x_gpio->gc.can_sleep = false; diff --git a/drivers/gpio/gpio-tz1090-pdc.c b/drivers/gpio/gpio-tz1090-pdc.c index ede7e403ffde..3623d009d808 100644 --- a/drivers/gpio/gpio-tz1090-pdc.c +++ b/drivers/gpio/gpio-tz1090-pdc.c @@ -137,16 +137,6 @@ static void tz1090_pdc_gpio_set(struct gpio_chip *chip, unsigned int offset, __global_unlock2(lstat); } -static int tz1090_pdc_gpio_request(struct gpio_chip *chip, unsigned int offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void tz1090_pdc_gpio_free(struct gpio_chip *chip, unsigned int offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int tz1090_pdc_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) { struct tz1090_pdc_gpio *priv = to_pdc(chip); @@ -203,8 +193,8 @@ static int tz1090_pdc_gpio_probe(struct platform_device *pdev) priv->chip.direction_output = tz1090_pdc_gpio_direction_output; priv->chip.get = tz1090_pdc_gpio_get; priv->chip.set = tz1090_pdc_gpio_set; - priv->chip.free = tz1090_pdc_gpio_free; - priv->chip.request = tz1090_pdc_gpio_request; + priv->chip.free = gpiochip_generic_free; + priv->chip.request = gpiochip_generic_request; priv->chip.to_irq = tz1090_pdc_gpio_to_irq; priv->chip.of_node = np; diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c index 069f9e4b7daa..87b950cec6ec 100644 --- a/drivers/gpio/gpio-vf610.c +++ b/drivers/gpio/gpio-vf610.c @@ -62,6 +62,11 @@ struct vf610_gpio_port { static struct irq_chip vf610_gpio_irq_chip; +static struct vf610_gpio_port *to_vf610_gp(struct gpio_chip *gc) +{ + return container_of(gc, struct vf610_gpio_port, gc); +} + static const struct of_device_id vf610_gpio_dt_ids[] = { { .compatible = "fsl,vf610-gpio" }, { /* sentinel */ } @@ -77,28 +82,16 @@ static inline u32 vf610_gpio_readl(void __iomem *reg) return readl_relaxed(reg); } -static int vf610_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void vf610_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int vf610_gpio_get(struct gpio_chip *gc, unsigned int gpio) { - struct vf610_gpio_port *port = - container_of(gc, struct vf610_gpio_port, gc); + struct vf610_gpio_port *port = to_vf610_gp(gc); return !!(vf610_gpio_readl(port->gpio_base + GPIO_PDIR) & BIT(gpio)); } static void vf610_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val) { - struct vf610_gpio_port *port = - container_of(gc, struct vf610_gpio_port, gc); + struct vf610_gpio_port *port = to_vf610_gp(gc); unsigned long mask = BIT(gpio); if (val) @@ -122,7 +115,8 @@ static int vf610_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, static void vf610_gpio_irq_handler(struct irq_desc *desc) { - struct vf610_gpio_port *port = irq_desc_get_handler_data(desc); + struct vf610_gpio_port *port = + to_vf610_gp(irq_desc_get_handler_data(desc)); struct irq_chip *chip = irq_desc_get_chip(desc); int pin; unsigned long irq_isfr; @@ -142,7 +136,8 @@ static void vf610_gpio_irq_handler(struct irq_desc *desc) static void vf610_gpio_irq_ack(struct irq_data *d) { - struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d); + struct vf610_gpio_port *port = + to_vf610_gp(irq_data_get_irq_chip_data(d)); int gpio = d->hwirq; vf610_gpio_writel(BIT(gpio), port->base + PORT_ISFR); @@ -150,7 +145,8 @@ static void vf610_gpio_irq_ack(struct irq_data *d) static int vf610_gpio_irq_set_type(struct irq_data *d, u32 type) { - struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d); + struct vf610_gpio_port *port = + to_vf610_gp(irq_data_get_irq_chip_data(d)); u8 irqc; switch (type) { @@ -185,7 +181,8 @@ static int vf610_gpio_irq_set_type(struct irq_data *d, u32 type) static void vf610_gpio_irq_mask(struct irq_data *d) { - struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d); + struct vf610_gpio_port *port = + to_vf610_gp(irq_data_get_irq_chip_data(d)); void __iomem *pcr_base = port->base + PORT_PCR(d->hwirq); vf610_gpio_writel(0, pcr_base); @@ -193,7 +190,8 @@ static void vf610_gpio_irq_mask(struct irq_data *d) static void vf610_gpio_irq_unmask(struct irq_data *d) { - struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d); + struct vf610_gpio_port *port = + to_vf610_gp(irq_data_get_irq_chip_data(d)); void __iomem *pcr_base = port->base + PORT_PCR(d->hwirq); vf610_gpio_writel(port->irqc[d->hwirq] << PORT_PCR_IRQC_OFFSET, @@ -202,7 +200,8 @@ static void vf610_gpio_irq_unmask(struct irq_data *d) static int vf610_gpio_irq_set_wake(struct irq_data *d, u32 enable) { - struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d); + struct vf610_gpio_port *port = + to_vf610_gp(irq_data_get_irq_chip_data(d)); if (enable) enable_irq_wake(port->irq); @@ -255,8 +254,8 @@ static int vf610_gpio_probe(struct platform_device *pdev) gc->ngpio = VF610_GPIO_PER_PORT; gc->base = of_alias_get_id(np, "gpio") * VF610_GPIO_PER_PORT; - gc->request = vf610_gpio_request; - gc->free = vf610_gpio_free; + gc->request = gpiochip_generic_request; + gc->free = gpiochip_generic_free; gc->direction_input = vf610_gpio_direction_input; gc->get = vf610_gpio_get; gc->direction_output = vf610_gpio_direction_output; diff --git a/drivers/gpio/gpio-xlp.c b/drivers/gpio/gpio-xlp.c index e02499a15e72..bc06a2cd2c1d 100644 --- a/drivers/gpio/gpio-xlp.c +++ b/drivers/gpio/gpio-xlp.c @@ -18,6 +18,7 @@ #include <linux/module.h> #include <linux/irq.h> #include <linux/interrupt.h> +#include <linux/irqchip/chained_irq.h> /* * XLP GPIO has multiple 32 bit registers for each feature where each register @@ -208,25 +209,28 @@ static struct irq_chip xlp_gpio_irq_chip = { .flags = IRQCHIP_ONESHOT_SAFE, }; -static irqreturn_t xlp_gpio_generic_handler(int irq, void *data) +static void xlp_gpio_generic_handler(struct irq_desc *desc) { - struct xlp_gpio_priv *priv = data; + struct xlp_gpio_priv *priv = irq_desc_get_handler_data(desc); + struct irq_chip *irqchip = irq_desc_get_chip(desc); int gpio, regoff; u32 gpio_stat; regoff = -1; gpio_stat = 0; + + chained_irq_enter(irqchip, desc); for_each_set_bit(gpio, priv->gpio_enabled_mask, XLP_MAX_NR_GPIO) { if (regoff != gpio / XLP_GPIO_REGSZ) { regoff = gpio / XLP_GPIO_REGSZ; gpio_stat = readl(priv->gpio_intr_stat + regoff * 4); } + if (gpio_stat & BIT(gpio % XLP_GPIO_REGSZ)) generic_handle_irq(irq_find_mapping( priv->chip.irqdomain, gpio)); } - - return IRQ_HANDLED; + chained_irq_exit(irqchip, desc); } static int xlp_gpio_dir_output(struct gpio_chip *gc, unsigned gpio, int state) @@ -378,12 +382,6 @@ static int xlp_gpio_probe(struct platform_device *pdev) gc->get = xlp_gpio_get; spin_lock_init(&priv->lock); - - err = devm_request_irq(&pdev->dev, irq, xlp_gpio_generic_handler, - IRQ_TYPE_NONE, pdev->name, priv); - if (err) - return err; - irq_base = irq_alloc_descs(-1, XLP_GPIO_IRQ_BASE, gc->ngpio, 0); if (irq_base < 0) { dev_err(&pdev->dev, "Failed to allocate IRQ numbers\n"); @@ -401,6 +399,9 @@ static int xlp_gpio_probe(struct platform_device *pdev) goto out_gpio_remove; } + gpiochip_set_chained_irqchip(gc, &xlp_gpio_irq_chip, irq, + xlp_gpio_generic_handler); + dev_info(&pdev->dev, "registered %d GPIOs\n", gc->ngpio); return 0; diff --git a/drivers/gpio/gpio-zx.c b/drivers/gpio/gpio-zx.c index 4b8a26910705..1dcf7a66dd36 100644 --- a/drivers/gpio/gpio-zx.c +++ b/drivers/gpio/gpio-zx.c @@ -41,7 +41,6 @@ struct zx_gpio { void __iomem *base; struct gpio_chip gc; - bool uses_pinctrl; }; static inline struct zx_gpio *to_zx(struct gpio_chip *gc) @@ -49,25 +48,6 @@ static inline struct zx_gpio *to_zx(struct gpio_chip *gc) return container_of(gc, struct zx_gpio, gc); } -static int zx_gpio_request(struct gpio_chip *gc, unsigned offset) -{ - struct zx_gpio *chip = to_zx(gc); - int gpio = gc->base + offset; - - if (chip->uses_pinctrl) - return pinctrl_request_gpio(gpio); - return 0; -} - -static void zx_gpio_free(struct gpio_chip *gc, unsigned offset) -{ - struct zx_gpio *chip = to_zx(gc); - int gpio = gc->base + offset; - - if (chip->uses_pinctrl) - pinctrl_free_gpio(gpio); -} - static int zx_direction_input(struct gpio_chip *gc, unsigned offset) { struct zx_gpio *chip = to_zx(gc); @@ -252,12 +232,12 @@ static int zx_gpio_probe(struct platform_device *pdev) return PTR_ERR(chip->base); spin_lock_init(&chip->lock); - if (of_property_read_bool(dev->of_node, "gpio-ranges")) - chip->uses_pinctrl = true; + if (of_property_read_bool(dev->of_node, "gpio-ranges")) { + chip->gc.request = gpiochip_generic_request; + chip->gc.free = gpiochip_generic_free; + } id = of_alias_get_id(dev->of_node, "gpio"); - chip->gc.request = zx_gpio_request; - chip->gc.free = zx_gpio_free; chip->gc.direction_input = zx_direction_input; chip->gc.direction_output = zx_direction_output; chip->gc.get = zx_get_value; diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c index 1d1a5865ede9..8abeacac5885 100644 --- a/drivers/gpio/gpio-zynq.c +++ b/drivers/gpio/gpio-zynq.c @@ -130,6 +130,12 @@ struct zynq_platform_data { static struct irq_chip zynq_gpio_level_irqchip; static struct irq_chip zynq_gpio_edge_irqchip; + +static struct zynq_gpio *to_zynq_gpio(struct gpio_chip *gc) +{ + return container_of(gc, struct zynq_gpio, chip); +} + /** * zynq_gpio_get_bank_pin - Get the bank number and pin number within that bank * for a given pin in the GPIO device @@ -177,7 +183,7 @@ static int zynq_gpio_get_value(struct gpio_chip *chip, unsigned int pin) { u32 data; unsigned int bank_num, bank_pin_num; - struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip); + struct zynq_gpio *gpio = to_zynq_gpio(chip); zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio); @@ -201,7 +207,7 @@ static void zynq_gpio_set_value(struct gpio_chip *chip, unsigned int pin, int state) { unsigned int reg_offset, bank_num, bank_pin_num; - struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip); + struct zynq_gpio *gpio = to_zynq_gpio(chip); zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio); @@ -238,7 +244,7 @@ static int zynq_gpio_dir_in(struct gpio_chip *chip, unsigned int pin) { u32 reg; unsigned int bank_num, bank_pin_num; - struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip); + struct zynq_gpio *gpio = to_zynq_gpio(chip); zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio); @@ -271,7 +277,7 @@ static int zynq_gpio_dir_out(struct gpio_chip *chip, unsigned int pin, { u32 reg; unsigned int bank_num, bank_pin_num; - struct zynq_gpio *gpio = container_of(chip, struct zynq_gpio, chip); + struct zynq_gpio *gpio = to_zynq_gpio(chip); zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio); @@ -301,7 +307,8 @@ static int zynq_gpio_dir_out(struct gpio_chip *chip, unsigned int pin, static void zynq_gpio_irq_mask(struct irq_data *irq_data) { unsigned int device_pin_num, bank_num, bank_pin_num; - struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data); + struct zynq_gpio *gpio = + to_zynq_gpio(irq_data_get_irq_chip_data(irq_data)); device_pin_num = irq_data->hwirq; zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio); @@ -321,7 +328,8 @@ static void zynq_gpio_irq_mask(struct irq_data *irq_data) static void zynq_gpio_irq_unmask(struct irq_data *irq_data) { unsigned int device_pin_num, bank_num, bank_pin_num; - struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data); + struct zynq_gpio *gpio = + to_zynq_gpio(irq_data_get_irq_chip_data(irq_data)); device_pin_num = irq_data->hwirq; zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio); @@ -340,7 +348,8 @@ static void zynq_gpio_irq_unmask(struct irq_data *irq_data) static void zynq_gpio_irq_ack(struct irq_data *irq_data) { unsigned int device_pin_num, bank_num, bank_pin_num; - struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data); + struct zynq_gpio *gpio = + to_zynq_gpio(irq_data_get_irq_chip_data(irq_data)); device_pin_num = irq_data->hwirq; zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio); @@ -390,7 +399,8 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type) { u32 int_type, int_pol, int_any; unsigned int device_pin_num, bank_num, bank_pin_num; - struct zynq_gpio *gpio = irq_data_get_irq_chip_data(irq_data); + struct zynq_gpio *gpio = + to_zynq_gpio(irq_data_get_irq_chip_data(irq_data)); device_pin_num = irq_data->hwirq; zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio); @@ -453,7 +463,8 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type) static int zynq_gpio_set_wake(struct irq_data *data, unsigned int on) { - struct zynq_gpio *gpio = irq_data_get_irq_chip_data(data); + struct zynq_gpio *gpio = + to_zynq_gpio(irq_data_get_irq_chip_data(data)); irq_set_irq_wake(gpio->irq, on); @@ -518,7 +529,8 @@ static void zynq_gpio_irqhandler(struct irq_desc *desc) { u32 int_sts, int_enb; unsigned int bank_num; - struct zynq_gpio *gpio = irq_desc_get_handler_data(desc); + struct zynq_gpio *gpio = + to_zynq_gpio(irq_desc_get_handler_data(desc)); struct irq_chip *irqchip = irq_desc_get_chip(desc); chained_irq_enter(irqchip, desc); diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 143a9bdbaa53..bbcac3af2a7a 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -304,7 +304,6 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) if (ACPI_FAILURE(status)) return; - INIT_LIST_HEAD(&acpi_gpio->events); acpi_walk_resources(handle, "_AEI", acpi_gpiochip_request_interrupt, acpi_gpio); } @@ -603,6 +602,25 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, break; } } + + /* + * The same GPIO can be shared between operation region and + * event but only if the access here is ACPI_READ. In that + * case we "borrow" the event GPIO instead. + */ + if (!found && agpio->sharable == ACPI_SHARED && + function == ACPI_READ) { + struct acpi_gpio_event *event; + + list_for_each_entry(event, &achip->events, node) { + if (event->pin == pin) { + desc = event->desc; + found = true; + break; + } + } + } + if (!found) { desc = gpiochip_request_own_desc(chip, pin, "ACPI:OpRegion"); @@ -719,6 +737,7 @@ void acpi_gpiochip_add(struct gpio_chip *chip) } acpi_gpio->chip = chip; + INIT_LIST_HEAD(&acpi_gpio->events); status = acpi_attach_data(handle, acpi_gpio_chip_dh, acpi_gpio); if (ACPI_FAILURE(status)) { diff --git a/drivers/gpio/gpiolib-legacy.c b/drivers/gpio/gpiolib-legacy.c index 8b830996fe02..3a5c7011ad3b 100644 --- a/drivers/gpio/gpiolib-legacy.c +++ b/drivers/gpio/gpiolib-legacy.c @@ -28,10 +28,6 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label) if (!desc && gpio_is_valid(gpio)) return -EPROBE_DEFER; - err = gpiod_request(desc, label); - if (err) - return err; - if (flags & GPIOF_OPEN_DRAIN) set_bit(FLAG_OPEN_DRAIN, &desc->flags); @@ -41,6 +37,10 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label) if (flags & GPIOF_ACTIVE_LOW) set_bit(FLAG_ACTIVE_LOW, &desc->flags); + err = gpiod_request(desc, label); + if (err) + return err; + if (flags & GPIOF_DIR_IN) err = gpiod_direction_input(desc); else diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index fa6e3c8823d6..5fe34a9df3e6 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -119,20 +119,20 @@ int of_get_named_gpio_flags(struct device_node *np, const char *list_name, EXPORT_SYMBOL(of_get_named_gpio_flags); /** - * of_get_gpio_hog() - Get a GPIO hog descriptor, names and flags for GPIO API + * of_parse_own_gpio() - Get a GPIO hog descriptor, names and flags for GPIO API * @np: device node to get GPIO from * @name: GPIO line name * @lflags: gpio_lookup_flags - returned from of_find_gpio() or - * of_get_gpio_hog() + * of_parse_own_gpio() * @dflags: gpiod_flags - optional GPIO initialization flags * * Returns GPIO descriptor to use with Linux GPIO API, or one of the errno * value on the error condition. */ -static struct gpio_desc *of_get_gpio_hog(struct device_node *np, - const char **name, - enum gpio_lookup_flags *lflags, - enum gpiod_flags *dflags) +static struct gpio_desc *of_parse_own_gpio(struct device_node *np, + const char **name, + enum gpio_lookup_flags *lflags, + enum gpiod_flags *dflags) { struct device_node *chip_np; enum of_gpio_flags xlate_flags; @@ -196,13 +196,13 @@ static struct gpio_desc *of_get_gpio_hog(struct device_node *np, } /** - * of_gpiochip_scan_hogs - Scan gpio-controller and apply GPIO hog as requested + * of_gpiochip_scan_gpios - Scan gpio-controller for gpio definitions * @chip: gpio chip to act on * * This is only used by of_gpiochip_add to request/set GPIO initial * configuration. */ -static void of_gpiochip_scan_hogs(struct gpio_chip *chip) +static void of_gpiochip_scan_gpios(struct gpio_chip *chip) { struct gpio_desc *desc = NULL; struct device_node *np; @@ -214,7 +214,7 @@ static void of_gpiochip_scan_hogs(struct gpio_chip *chip) if (!of_property_read_bool(np, "gpio-hog")) continue; - desc = of_get_gpio_hog(np, &name, &lflags, &dflags); + desc = of_parse_own_gpio(np, &name, &lflags, &dflags); if (IS_ERR(desc)) continue; @@ -440,7 +440,7 @@ int of_gpiochip_add(struct gpio_chip *chip) of_node_get(chip->of_node); - of_gpiochip_scan_hogs(chip); + of_gpiochip_scan_gpios(chip); return 0; } diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 5db3445552b1..6798355c61c6 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -15,6 +15,7 @@ #include <linux/acpi.h> #include <linux/gpio/driver.h> #include <linux/gpio/machine.h> +#include <linux/pinctrl/consumer.h> #include "gpiolib.h" @@ -47,8 +48,6 @@ */ DEFINE_SPINLOCK(gpio_lock); -#define GPIO_OFFSET_VALID(chip, offset) (offset >= 0 && offset < chip->ngpio) - static DEFINE_MUTEX(gpio_lookup_lock); static LIST_HEAD(gpio_lookup_list); LIST_HEAD(gpio_chips); @@ -219,6 +218,68 @@ static int gpiochip_add_to_list(struct gpio_chip *chip) } /** + * Convert a GPIO name to its descriptor + */ +static struct gpio_desc *gpio_name_to_desc(const char * const name) +{ + struct gpio_chip *chip; + unsigned long flags; + + spin_lock_irqsave(&gpio_lock, flags); + + list_for_each_entry(chip, &gpio_chips, list) { + int i; + + for (i = 0; i != chip->ngpio; ++i) { + struct gpio_desc *gpio = &chip->desc[i]; + + if (!gpio->name) + continue; + + if (!strcmp(gpio->name, name)) { + spin_unlock_irqrestore(&gpio_lock, flags); + return gpio; + } + } + } + + spin_unlock_irqrestore(&gpio_lock, flags); + + return NULL; +} + +/* + * Takes the names from gc->names and checks if they are all unique. If they + * are, they are assigned to their gpio descriptors. + * + * Returns -EEXIST if one of the names is already used for a different GPIO. + */ +static int gpiochip_set_desc_names(struct gpio_chip *gc) +{ + int i; + + if (!gc->names) + return 0; + + /* First check all names if they are unique */ + for (i = 0; i != gc->ngpio; ++i) { + struct gpio_desc *gpio; + + gpio = gpio_name_to_desc(gc->names[i]); + if (gpio) + dev_warn(gc->dev, "Detected name collision for " + "GPIO name '%s'\n", + gc->names[i]); + } + + /* Then add all names to the GPIO descriptors */ + for (i = 0; i != gc->ngpio; ++i) + gc->desc[i].name = gc->names[i]; + + return 0; +} + +/** * gpiochip_add() - register a gpio_chip * @chip: the chip to register, with chip->base initialized * Context: potentially before irqs will work @@ -290,6 +351,10 @@ int gpiochip_add(struct gpio_chip *chip) if (!chip->owner && chip->dev && chip->dev->driver) chip->owner = chip->dev->driver->owner; + status = gpiochip_set_desc_names(chip); + if (status) + goto err_remove_from_list; + status = of_gpiochip_add(chip); if (status) goto err_remove_chip; @@ -310,6 +375,7 @@ err_remove_chip: acpi_gpiochip_remove(chip); gpiochip_free_hogs(chip); of_gpiochip_remove(chip); +err_remove_from_list: spin_lock_irqsave(&gpio_lock, flags); list_del(&chip->list); spin_unlock_irqrestore(&gpio_lock, flags); @@ -680,6 +746,28 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) {} #endif /* CONFIG_GPIOLIB_IRQCHIP */ +/** + * gpiochip_generic_request() - request the gpio function for a pin + * @chip: the gpiochip owning the GPIO + * @offset: the offset of the GPIO to request for GPIO function + */ +int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset) +{ + return pinctrl_request_gpio(chip->base + offset); +} +EXPORT_SYMBOL_GPL(gpiochip_generic_request); + +/** + * gpiochip_generic_free() - free the gpio function from a pin + * @chip: the gpiochip to request the gpio function for + * @offset: the offset of the GPIO to free from GPIO function + */ +void gpiochip_generic_free(struct gpio_chip *chip, unsigned offset) +{ + pinctrl_free_gpio(chip->base + offset); +} +EXPORT_SYMBOL_GPL(gpiochip_generic_free); + #ifdef CONFIG_PINCTRL /** @@ -839,6 +927,14 @@ static int __gpiod_request(struct gpio_desc *desc, const char *label) spin_lock_irqsave(&gpio_lock, flags); } done: + if (status < 0) { + /* Clear flags that might have been set by the caller before + * requesting the GPIO. + */ + clear_bit(FLAG_ACTIVE_LOW, &desc->flags); + clear_bit(FLAG_OPEN_DRAIN, &desc->flags); + clear_bit(FLAG_OPEN_SOURCE, &desc->flags); + } spin_unlock_irqrestore(&gpio_lock, flags); return status; } @@ -928,7 +1024,7 @@ const char *gpiochip_is_requested(struct gpio_chip *chip, unsigned offset) { struct gpio_desc *desc; - if (!GPIO_OFFSET_VALID(chip, offset)) + if (offset >= chip->ngpio) return NULL; desc = &chip->desc[offset]; @@ -1735,6 +1831,13 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, if (of_flags & OF_GPIO_ACTIVE_LOW) *flags |= GPIO_ACTIVE_LOW; + if (of_flags & OF_GPIO_SINGLE_ENDED) { + if (of_flags & OF_GPIO_ACTIVE_LOW) + *flags |= GPIO_OPEN_DRAIN; + else + *flags |= GPIO_OPEN_SOURCE; + } + return desc; } @@ -1953,13 +2056,28 @@ struct gpio_desc *__must_check gpiod_get_optional(struct device *dev, } EXPORT_SYMBOL_GPL(gpiod_get_optional); +/** + * gpiod_parse_flags - helper function to parse GPIO lookup flags + * @desc: gpio to be setup + * @lflags: gpio_lookup_flags - returned from of_find_gpio() or + * of_get_gpio_hog() + * + * Set the GPIO descriptor flags based on the given GPIO lookup flags. + */ +static void gpiod_parse_flags(struct gpio_desc *desc, unsigned long lflags) +{ + if (lflags & GPIO_ACTIVE_LOW) + set_bit(FLAG_ACTIVE_LOW, &desc->flags); + if (lflags & GPIO_OPEN_DRAIN) + set_bit(FLAG_OPEN_DRAIN, &desc->flags); + if (lflags & GPIO_OPEN_SOURCE) + set_bit(FLAG_OPEN_SOURCE, &desc->flags); +} /** * gpiod_configure_flags - helper function to configure a given GPIO * @desc: gpio whose value will be assigned * @con_id: function within the GPIO consumer - * @lflags: gpio_lookup_flags - returned from of_find_gpio() or - * of_get_gpio_hog() * @dflags: gpiod_flags - optional GPIO initialization flags * * Return 0 on success, -ENOENT if no GPIO has been assigned to the @@ -1967,17 +2085,10 @@ EXPORT_SYMBOL_GPL(gpiod_get_optional); * occurred while trying to acquire the GPIO. */ static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id, - unsigned long lflags, enum gpiod_flags dflags) + enum gpiod_flags dflags) { int status; - if (lflags & GPIO_ACTIVE_LOW) - set_bit(FLAG_ACTIVE_LOW, &desc->flags); - if (lflags & GPIO_OPEN_DRAIN) - set_bit(FLAG_OPEN_DRAIN, &desc->flags); - if (lflags & GPIO_OPEN_SOURCE) - set_bit(FLAG_OPEN_SOURCE, &desc->flags); - /* No particular flag request, return here... */ if (!(dflags & GPIOD_FLAGS_BIT_DIR_SET)) { pr_debug("no flags found for %s\n", con_id); @@ -2044,11 +2155,13 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev, return desc; } + gpiod_parse_flags(desc, lookupflags); + status = gpiod_request(desc, con_id); if (status < 0) return ERR_PTR(status); - status = gpiod_configure_flags(desc, con_id, lookupflags, flags); + status = gpiod_configure_flags(desc, con_id, flags); if (status < 0) { dev_dbg(dev, "setup of GPIO %s failed\n", con_id); gpiod_put(desc); @@ -2078,6 +2191,7 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, { struct gpio_desc *desc = ERR_PTR(-ENODEV); bool active_low = false; + bool single_ended = false; int ret; if (!fwnode) @@ -2088,8 +2202,10 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, desc = of_get_named_gpiod_flags(to_of_node(fwnode), propname, 0, &flags); - if (!IS_ERR(desc)) + if (!IS_ERR(desc)) { active_low = flags & OF_GPIO_ACTIVE_LOW; + single_ended = flags & OF_GPIO_SINGLE_ENDED; + } } else if (is_acpi_node(fwnode)) { struct acpi_gpio_info info; @@ -2102,14 +2218,20 @@ struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, if (IS_ERR(desc)) return desc; + if (active_low) + set_bit(FLAG_ACTIVE_LOW, &desc->flags); + + if (single_ended) { + if (active_low) + set_bit(FLAG_OPEN_DRAIN, &desc->flags); + else + set_bit(FLAG_OPEN_SOURCE, &desc->flags); + } + ret = gpiod_request(desc, NULL); if (ret) return ERR_PTR(ret); - /* Only value flag can be set from both DT and ACPI is active_low */ - if (active_low) - set_bit(FLAG_ACTIVE_LOW, &desc->flags); - return desc; } EXPORT_SYMBOL_GPL(fwnode_get_named_gpiod); @@ -2162,6 +2284,8 @@ int gpiod_hog(struct gpio_desc *desc, const char *name, chip = gpiod_to_chip(desc); hwnum = gpio_chip_hwgpio(desc); + gpiod_parse_flags(desc, lflags); + local_desc = gpiochip_request_own_desc(chip, hwnum, name); if (IS_ERR(local_desc)) { pr_err("requesting hog GPIO %s (chip %s, offset %d) failed\n", @@ -2169,7 +2293,7 @@ int gpiod_hog(struct gpio_desc *desc, const char *name, return PTR_ERR(local_desc); } - status = gpiod_configure_flags(desc, name, lflags, dflags); + status = gpiod_configure_flags(desc, name, dflags); if (status < 0) { pr_err("setup of hog GPIO %s (chip %s, offset %d) failed\n", name, chip->label, hwnum); @@ -2309,14 +2433,19 @@ static void gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip) int is_irq; for (i = 0; i < chip->ngpio; i++, gpio++, gdesc++) { - if (!test_bit(FLAG_REQUESTED, &gdesc->flags)) + if (!test_bit(FLAG_REQUESTED, &gdesc->flags)) { + if (gdesc->name) { + seq_printf(s, " gpio-%-3d (%-20.20s)\n", + gpio, gdesc->name); + } continue; + } gpiod_get_direction(gdesc); is_out = test_bit(FLAG_IS_OUT, &gdesc->flags); is_irq = test_bit(FLAG_USED_AS_IRQ, &gdesc->flags); - seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s", - gpio, gdesc->label, + seq_printf(s, " gpio-%-3d (%-20.20s|%-20.20s) %s %s %s", + gpio, gdesc->name ? gdesc->name : "", gdesc->label, is_out ? "out" : "in ", chip->get ? (chip->get(chip, i) ? "hi" : "lo") diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index bf343004b008..78e634d1c719 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -89,7 +89,10 @@ struct gpio_desc { #define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */ #define FLAG_IS_HOGGED 11 /* GPIO is hogged */ + /* Connection label */ const char *label; + /* Name of the GPIO */ + const char *name; }; int gpiod_request(struct gpio_desc *desc, const char *label); diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c index 8efa235ca1c9..a1ea565fcd46 100644 --- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c +++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c @@ -330,16 +330,6 @@ static inline void bcm2835_pinctrl_fsel_set( bcm2835_gpio_wr(pc, FSEL_REG(pin), val); } -static int bcm2835_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void bcm2835_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int bcm2835_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { return pinctrl_gpio_direction_input(chip->base + offset); @@ -375,8 +365,8 @@ static int bcm2835_gpio_to_irq(struct gpio_chip *chip, unsigned offset) static struct gpio_chip bcm2835_gpio_chip = { .label = MODULE_NAME, .owner = THIS_MODULE, - .request = bcm2835_gpio_request, - .free = bcm2835_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .direction_input = bcm2835_gpio_direction_input, .direction_output = bcm2835_gpio_direction_output, .get = bcm2835_gpio_get, diff --git a/drivers/pinctrl/intel/pinctrl-cherryview.c b/drivers/pinctrl/intel/pinctrl-cherryview.c index 270c127e03ea..84936bae6e5e 100644 --- a/drivers/pinctrl/intel/pinctrl-cherryview.c +++ b/drivers/pinctrl/intel/pinctrl-cherryview.c @@ -1149,16 +1149,6 @@ static struct pinctrl_desc chv_pinctrl_desc = { .owner = THIS_MODULE, }; -static int chv_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void chv_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static unsigned chv_gpio_offset_to_pin(struct chv_pinctrl *pctrl, unsigned offset) { @@ -1238,8 +1228,8 @@ static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned offset, static const struct gpio_chip chv_gpio_chip = { .owner = THIS_MODULE, - .request = chv_gpio_request, - .free = chv_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .get_direction = chv_gpio_get_direction, .direction_input = chv_gpio_direction_input, .direction_output = chv_gpio_direction_output, diff --git a/drivers/pinctrl/intel/pinctrl-intel.c b/drivers/pinctrl/intel/pinctrl-intel.c index c4274542a5a0..392e28d3f48d 100644 --- a/drivers/pinctrl/intel/pinctrl-intel.c +++ b/drivers/pinctrl/intel/pinctrl-intel.c @@ -596,16 +596,6 @@ static const struct pinctrl_desc intel_pinctrl_desc = { .owner = THIS_MODULE, }; -static int intel_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void intel_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int intel_gpio_get(struct gpio_chip *chip, unsigned offset) { struct intel_pinctrl *pctrl = gpiochip_to_pinctrl(chip); @@ -653,8 +643,8 @@ static int intel_gpio_direction_output(struct gpio_chip *chip, unsigned offset, static const struct gpio_chip intel_gpio_chip = { .owner = THIS_MODULE, - .request = intel_gpio_request, - .free = intel_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .direction_input = intel_gpio_direction_input, .direction_output = intel_gpio_direction_output, .get = intel_gpio_get, diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c index 5279e230e1b5..f307f1d27d64 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c @@ -723,16 +723,6 @@ static const struct pinmux_ops mtk_pmx_ops = { .gpio_set_direction = mtk_pmx_gpio_set_direction, }; -static int mtk_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void mtk_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { @@ -1005,8 +995,8 @@ static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset, static struct gpio_chip mtk_gpio_chip = { .owner = THIS_MODULE, - .request = mtk_gpio_request, - .free = mtk_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .direction_input = mtk_gpio_direction_input, .direction_output = mtk_gpio_direction_output, .get = mtk_gpio_get, diff --git a/drivers/pinctrl/nomadik/pinctrl-abx500.c b/drivers/pinctrl/nomadik/pinctrl-abx500.c index 97681fac082e..b59fbb4b1fb1 100644 --- a/drivers/pinctrl/nomadik/pinctrl-abx500.c +++ b/drivers/pinctrl/nomadik/pinctrl-abx500.c @@ -654,25 +654,11 @@ static inline void abx500_gpio_dbg_show_one(struct seq_file *s, #define abx500_gpio_dbg_show NULL #endif -static int abx500_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - - return pinctrl_request_gpio(gpio); -} - -static void abx500_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - - pinctrl_free_gpio(gpio); -} - static struct gpio_chip abx500gpio_chip = { .label = "abx500-gpio", .owner = THIS_MODULE, - .request = abx500_gpio_request, - .free = abx500_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .direction_input = abx500_gpio_direction_input, .get = abx500_gpio_get, .direction_output = abx500_gpio_direction_output, diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.c b/drivers/pinctrl/nomadik/pinctrl-nomadik.c index 96cf03908e93..eebfae0c9b7c 100644 --- a/drivers/pinctrl/nomadik/pinctrl-nomadik.c +++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.c @@ -884,24 +884,6 @@ static void nmk_gpio_latent_irq_handler(struct irq_desc *desc) /* I/O Functions */ -static int nmk_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - /* - * Map back to global GPIO space and request muxing, the direction - * parameter does not matter for this controller. - */ - int gpio = chip->base + offset; - - return pinctrl_request_gpio(gpio); -} - -static void nmk_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - - pinctrl_free_gpio(gpio); -} - static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset) { struct nmk_gpio_chip *nmk_chip = @@ -1267,8 +1249,8 @@ static int nmk_gpio_probe(struct platform_device *dev) spin_lock_init(&nmk_chip->lock); chip = &nmk_chip->chip; - chip->request = nmk_gpio_request; - chip->free = nmk_gpio_free; + chip->request = gpiochip_generic_request; + chip->free = gpiochip_generic_free; chip->direction_input = nmk_gpio_make_input; chip->get = nmk_gpio_get_input; chip->direction_output = nmk_gpio_make_output; diff --git a/drivers/pinctrl/pinctrl-adi2.c b/drivers/pinctrl/pinctrl-adi2.c index f6be68518c87..fd342dffe4dc 100644 --- a/drivers/pinctrl/pinctrl-adi2.c +++ b/drivers/pinctrl/pinctrl-adi2.c @@ -713,16 +713,6 @@ static struct pinctrl_desc adi_pinmux_desc = { .owner = THIS_MODULE, }; -static int adi_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void adi_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int adi_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { struct gpio_port *port; @@ -994,8 +984,8 @@ static int adi_gpio_probe(struct platform_device *pdev) port->chip.get = adi_gpio_get_value; port->chip.direction_output = adi_gpio_direction_output; port->chip.set = adi_gpio_set_value; - port->chip.request = adi_gpio_request; - port->chip.free = adi_gpio_free; + port->chip.request = gpiochip_generic_request, + port->chip.free = gpiochip_generic_free, port->chip.to_irq = adi_gpio_to_irq; if (pdata->port_gpio_base > 0) port->chip.base = pdata->port_gpio_base; diff --git a/drivers/pinctrl/pinctrl-as3722.c b/drivers/pinctrl/pinctrl-as3722.c index 4747e08f5389..56af28b95a44 100644 --- a/drivers/pinctrl/pinctrl-as3722.c +++ b/drivers/pinctrl/pinctrl-as3722.c @@ -536,21 +536,11 @@ static int as3722_gpio_to_irq(struct gpio_chip *chip, unsigned offset) return as3722_irq_get_virq(as_pci->as3722, offset); } -static int as3722_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void as3722_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static const struct gpio_chip as3722_gpio_chip = { .label = "as3722-gpio", .owner = THIS_MODULE, - .request = as3722_gpio_request, - .free = as3722_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .get = as3722_gpio_get, .set = as3722_gpio_set, .direction_input = as3722_gpio_direction_input, diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c index 7a828ae6716b..0d2fc0cff35e 100644 --- a/drivers/pinctrl/pinctrl-at91.c +++ b/drivers/pinctrl/pinctrl-at91.c @@ -1280,28 +1280,6 @@ static int at91_pinctrl_remove(struct platform_device *pdev) return 0; } -static int at91_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - /* - * Map back to global GPIO space and request muxing, the direction - * parameter does not matter for this controller. - */ - int gpio = chip->base + offset; - int bank = chip->base / chip->ngpio; - - dev_dbg(chip->dev, "%s:%d pio%c%d(%d)\n", __func__, __LINE__, - 'A' + bank, offset, gpio); - - return pinctrl_request_gpio(gpio); -} - -static void at91_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - - pinctrl_free_gpio(gpio); -} - static int at91_gpio_get_direction(struct gpio_chip *chip, unsigned offset) { struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip); @@ -1687,8 +1665,8 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev, /* This structure is replicated for each GPIO block allocated at probe time */ static struct gpio_chip at91_gpio_template = { - .request = at91_gpio_request, - .free = at91_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .get_direction = at91_gpio_get_direction, .direction_input = at91_gpio_direction_input, .get = at91_gpio_get, diff --git a/drivers/pinctrl/pinctrl-coh901.c b/drivers/pinctrl/pinctrl-coh901.c index 9c9b88934bcc..813eb7c771ec 100644 --- a/drivers/pinctrl/pinctrl-coh901.c +++ b/drivers/pinctrl/pinctrl-coh901.c @@ -217,24 +217,6 @@ static inline struct u300_gpio *to_u300_gpio(struct gpio_chip *chip) return container_of(chip, struct u300_gpio, chip); } -static int u300_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - /* - * Map back to global GPIO space and request muxing, the direction - * parameter does not matter for this controller. - */ - int gpio = chip->base + offset; - - return pinctrl_request_gpio(gpio); -} - -static void u300_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - - pinctrl_free_gpio(gpio); -} - static int u300_gpio_get(struct gpio_chip *chip, unsigned offset) { struct u300_gpio *gpio = to_u300_gpio(chip); @@ -417,8 +399,8 @@ int u300_gpio_config_set(struct gpio_chip *chip, unsigned offset, static struct gpio_chip u300_gpio_chip = { .label = "u300-gpio-chip", .owner = THIS_MODULE, - .request = u300_gpio_request, - .free = u300_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .get = u300_gpio_get, .set = u300_gpio_set, .direction_input = u300_gpio_direction_input, diff --git a/drivers/pinctrl/pinctrl-digicolor.c b/drivers/pinctrl/pinctrl-digicolor.c index 11f8b835d3b6..38a7799f8257 100644 --- a/drivers/pinctrl/pinctrl-digicolor.c +++ b/drivers/pinctrl/pinctrl-digicolor.c @@ -169,16 +169,6 @@ static struct pinmux_ops dc_pmxops = { .gpio_request_enable = dc_pmx_request_gpio, }; -static int dc_gpio_request(struct gpio_chip *chip, unsigned gpio) -{ - return pinctrl_request_gpio(chip->base + gpio); -} - -static void dc_gpio_free(struct gpio_chip *chip, unsigned gpio) -{ - pinctrl_free_gpio(chip->base + gpio); -} - static int dc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) { struct dc_pinmap *pmap = container_of(chip, struct dc_pinmap, chip); @@ -255,8 +245,8 @@ static int dc_gpiochip_add(struct dc_pinmap *pmap, struct device_node *np) chip->label = DRIVER_NAME; chip->dev = pmap->dev; - chip->request = dc_gpio_request; - chip->free = dc_gpio_free; + chip->request = gpiochip_generic_request; + chip->free = gpiochip_generic_free; chip->direction_input = dc_gpio_direction_input; chip->direction_output = dc_gpio_direction_output; chip->get = dc_gpio_get; diff --git a/drivers/pinctrl/pinctrl-pistachio.c b/drivers/pinctrl/pinctrl-pistachio.c index 952b1c623887..85c9046c690e 100644 --- a/drivers/pinctrl/pinctrl-pistachio.c +++ b/drivers/pinctrl/pinctrl-pistachio.c @@ -1171,16 +1171,6 @@ static struct pinctrl_desc pistachio_pinctrl_desc = { .confops = &pistachio_pinconf_ops, }; -static int pistachio_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void pistachio_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int pistachio_gpio_get_direction(struct gpio_chip *chip, unsigned offset) { struct pistachio_gpio_bank *bank = gc_to_bank(chip); @@ -1332,8 +1322,8 @@ static void pistachio_gpio_irq_handler(struct irq_desc *desc) .npins = _npins, \ .gpio_chip = { \ .label = "GPIO" #_bank, \ - .request = pistachio_gpio_request, \ - .free = pistachio_gpio_free, \ + .request = gpiochip_generic_request, \ + .free = gpiochip_generic_free, \ .get_direction = pistachio_gpio_get_direction, \ .direction_input = pistachio_gpio_direction_input, \ .direction_output = pistachio_gpio_direction_output, \ diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index 3d020fdc7bb6..a0651128e23a 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -1374,16 +1374,6 @@ static int rockchip_pinctrl_register(struct platform_device *pdev, * GPIO handling */ -static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value) { struct rockchip_pin_bank *bank = gc_to_pin_bank(gc); @@ -1461,8 +1451,8 @@ static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset) } static const struct gpio_chip rockchip_gpiolib_chip = { - .request = rockchip_gpio_request, - .free = rockchip_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .set = rockchip_gpio_set, .get = rockchip_gpio_get, .direction_input = rockchip_gpio_direction_input, diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c index 389526e704fb..b58d3f29148a 100644 --- a/drivers/pinctrl/pinctrl-st.c +++ b/drivers/pinctrl/pinctrl-st.c @@ -742,16 +742,6 @@ static void st_gpio_direction(struct st_gpio_bank *bank, } } -static int st_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void st_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int st_gpio_get(struct gpio_chip *chip, unsigned offset) { struct st_gpio_bank *bank = gpio_chip_to_bank(chip); @@ -1490,8 +1480,8 @@ static void st_gpio_irqmux_handler(struct irq_desc *desc) } static struct gpio_chip st_gpio_template = { - .request = st_gpio_request, - .free = st_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .get = st_gpio_get, .set = st_gpio_set, .direction_input = st_gpio_direction_input, diff --git a/drivers/pinctrl/pinctrl-xway.c b/drivers/pinctrl/pinctrl-xway.c index 779950c62e53..ae724bdab3d3 100644 --- a/drivers/pinctrl/pinctrl-xway.c +++ b/drivers/pinctrl/pinctrl-xway.c @@ -682,28 +682,14 @@ static int xway_gpio_dir_out(struct gpio_chip *chip, unsigned int pin, int val) return 0; } -static int xway_gpio_req(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - - return pinctrl_request_gpio(gpio); -} - -static void xway_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - - pinctrl_free_gpio(gpio); -} - static struct gpio_chip xway_chip = { .label = "gpio-xway", .direction_input = xway_gpio_dir_in, .direction_output = xway_gpio_dir_out, .get = xway_gpio_get, .set = xway_gpio_set, - .request = xway_gpio_req, - .free = xway_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .base = -1, }; diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c index a0c7407c1cac..146264a41ec8 100644 --- a/drivers/pinctrl/qcom/pinctrl-msm.c +++ b/drivers/pinctrl/qcom/pinctrl-msm.c @@ -458,18 +458,6 @@ static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int value) spin_unlock_irqrestore(&pctrl->lock, flags); } -static int msm_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - return pinctrl_request_gpio(gpio); -} - -static void msm_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - int gpio = chip->base + offset; - return pinctrl_free_gpio(gpio); -} - #ifdef CONFIG_DEBUG_FS #include <linux/seq_file.h> @@ -527,8 +515,8 @@ static struct gpio_chip msm_gpio_template = { .direction_output = msm_gpio_direction_output, .get = msm_gpio_get, .set = msm_gpio_set, - .request = msm_gpio_request, - .free = msm_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .dbg_show = msm_gpio_dbg_show, }; diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c index bd1e24598e12..6c42ca14d2fd 100644 --- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c +++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c @@ -546,16 +546,6 @@ static void pmic_gpio_set(struct gpio_chip *chip, unsigned pin, int value) pmic_gpio_config_set(state->ctrl, pin, &config, 1); } -static int pmic_gpio_request(struct gpio_chip *chip, unsigned base) -{ - return pinctrl_request_gpio(chip->base + base); -} - -static void pmic_gpio_free(struct gpio_chip *chip, unsigned base) -{ - pinctrl_free_gpio(chip->base + base); -} - static int pmic_gpio_of_xlate(struct gpio_chip *chip, const struct of_phandle_args *gpio_desc, u32 *flags) @@ -595,8 +585,8 @@ static const struct gpio_chip pmic_gpio_gpio_template = { .direction_output = pmic_gpio_direction_output, .get = pmic_gpio_get, .set = pmic_gpio_set, - .request = pmic_gpio_request, - .free = pmic_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .of_xlate = pmic_gpio_of_xlate, .to_irq = pmic_gpio_to_irq, .dbg_show = pmic_gpio_dbg_show, diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c b/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c index e3be3ce2cada..9ce0e30e33e8 100644 --- a/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c +++ b/drivers/pinctrl/qcom/pinctrl-spmi-mpp.c @@ -604,16 +604,6 @@ static void pmic_mpp_set(struct gpio_chip *chip, unsigned pin, int value) pmic_mpp_config_set(state->ctrl, pin, &config, 1); } -static int pmic_mpp_request(struct gpio_chip *chip, unsigned base) -{ - return pinctrl_request_gpio(chip->base + base); -} - -static void pmic_mpp_free(struct gpio_chip *chip, unsigned base) -{ - pinctrl_free_gpio(chip->base + base); -} - static int pmic_mpp_of_xlate(struct gpio_chip *chip, const struct of_phandle_args *gpio_desc, u32 *flags) @@ -653,8 +643,8 @@ static const struct gpio_chip pmic_mpp_gpio_template = { .direction_output = pmic_mpp_direction_output, .get = pmic_mpp_get, .set = pmic_mpp_set, - .request = pmic_mpp_request, - .free = pmic_mpp_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .of_xlate = pmic_mpp_of_xlate, .to_irq = pmic_mpp_to_irq, .dbg_show = pmic_mpp_dbg_show, diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c index c760bf43d116..3f622ccd8eab 100644 --- a/drivers/pinctrl/samsung/pinctrl-samsung.c +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c @@ -888,19 +888,9 @@ static int samsung_pinctrl_register(struct platform_device *pdev, return 0; } -static int samsung_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void samsung_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static const struct gpio_chip samsung_gpiolib_chip = { - .request = samsung_gpio_request, - .free = samsung_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .set = samsung_gpio_set, .get = samsung_gpio_get, .direction_input = samsung_gpio_direction_input, diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c index 21fd638171f9..dead97daca35 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c @@ -446,16 +446,6 @@ static const struct pinmux_ops sunxi_pmx_ops = { .gpio_set_direction = sunxi_pmx_gpio_set_direction, }; -static int sunxi_pinctrl_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void sunxi_pinctrl_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int sunxi_pinctrl_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { @@ -956,8 +946,8 @@ int sunxi_pinctrl_init(struct platform_device *pdev, last_pin = pctl->desc->pins[pctl->desc->npins - 1].pin.number; pctl->chip->owner = THIS_MODULE; - pctl->chip->request = sunxi_pinctrl_gpio_request, - pctl->chip->free = sunxi_pinctrl_gpio_free, + pctl->chip->request = gpiochip_generic_request, + pctl->chip->free = gpiochip_generic_free, pctl->chip->direction_input = sunxi_pinctrl_gpio_direction_input, pctl->chip->direction_output = sunxi_pinctrl_gpio_direction_output, pctl->chip->get = sunxi_pinctrl_gpio_get, diff --git a/drivers/pinctrl/vt8500/pinctrl-wmt.c b/drivers/pinctrl/vt8500/pinctrl-wmt.c index c15316b003c5..fb22d3f62480 100644 --- a/drivers/pinctrl/vt8500/pinctrl-wmt.c +++ b/drivers/pinctrl/vt8500/pinctrl-wmt.c @@ -486,16 +486,6 @@ static struct pinctrl_desc wmt_desc = { .confops = &wmt_pinconf_ops, }; -static int wmt_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - return pinctrl_request_gpio(chip->base + offset); -} - -static void wmt_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - pinctrl_free_gpio(chip->base + offset); -} - static int wmt_gpio_get_direction(struct gpio_chip *chip, unsigned offset) { struct wmt_pinctrl_data *data = dev_get_drvdata(chip->dev); @@ -560,8 +550,8 @@ static int wmt_gpio_direction_output(struct gpio_chip *chip, unsigned offset, static struct gpio_chip wmt_gpio_chip = { .label = "gpio-wmt", .owner = THIS_MODULE, - .request = wmt_gpio_request, - .free = wmt_gpio_free, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, .get_direction = wmt_gpio_get_direction, .direction_input = wmt_gpio_direction_input, .direction_output = wmt_gpio_direction_output, diff --git a/include/dt-bindings/gpio/gpio.h b/include/dt-bindings/gpio/gpio.h index e6b1e0a808ae..c673d2c87c60 100644 --- a/include/dt-bindings/gpio/gpio.h +++ b/include/dt-bindings/gpio/gpio.h @@ -9,7 +9,19 @@ #ifndef _DT_BINDINGS_GPIO_GPIO_H #define _DT_BINDINGS_GPIO_GPIO_H +/* Bit 0 express polarity */ #define GPIO_ACTIVE_HIGH 0 #define GPIO_ACTIVE_LOW 1 +/* Bit 1 express single-endedness */ +#define GPIO_PUSH_PULL 0 +#define GPIO_SINGLE_ENDED 2 + +/* + * Open Drain/Collector is the combination of single-ended active low, + * Open Source/Emitter is the combination of single-ended active high. + */ +#define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_ACTIVE_LOW) +#define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_ACTIVE_HIGH) + #endif diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index 14cac67c2012..fb0fde686cb1 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -400,6 +400,7 @@ static inline struct gpio_desc *gpio_to_desc(unsigned gpio) { return ERR_PTR(-EINVAL); } + static inline int desc_to_gpio(const struct gpio_desc *desc) { /* GPIO can never have been requested */ diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 1aed31c5ffba..d1baebf350d8 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -206,6 +206,9 @@ int _gpiochip_irqchip_add(struct gpio_chip *gpiochip, #endif /* CONFIG_GPIOLIB_IRQCHIP */ +int gpiochip_generic_request(struct gpio_chip *chip, unsigned offset); +void gpiochip_generic_free(struct gpio_chip *chip, unsigned offset); + #ifdef CONFIG_PINCTRL /** diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h index f3191828f037..87d6d1632dd4 100644 --- a/include/linux/of_gpio.h +++ b/include/linux/of_gpio.h @@ -29,6 +29,7 @@ struct device_node; */ enum of_gpio_flags { OF_GPIO_ACTIVE_LOW = 0x1, + OF_GPIO_SINGLE_ENDED = 0x2, }; #ifdef CONFIG_OF_GPIO |