diff options
| -rw-r--r-- | Documentation/devicetree/bindings/arm/atmel-at91.txt | 59 | ||||
| -rw-r--r-- | MAINTAINERS | 5 | ||||
| -rw-r--r-- | drivers/power/ipaq_micro_battery.c | 2 | ||||
| -rw-r--r-- | drivers/power/max8925_power.c | 10 | ||||
| -rw-r--r-- | drivers/power/reset/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/power/reset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/reset/at91-sama5d2_shdwc.c | 282 | ||||
| -rw-r--r-- | drivers/power/sbs-battery.c | 4 |
8 files changed, 361 insertions, 10 deletions
diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt index 1d8004633479..e1f5ad855f14 100644 --- a/Documentation/devicetree/bindings/arm/atmel-at91.txt +++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt @@ -151,6 +151,65 @@ Example: clocks = <&clk32k>; }; +SHDWC SAMA5D2-Compatible Shutdown Controller + +1) shdwc node + +required properties: +- compatible: should be "atmel,sama5d2-shdwc". +- reg: should contain registers location and length +- clocks: phandle to input clock. +- #address-cells: should be one. The cell is the wake-up input index. +- #size-cells: should be zero. + +optional properties: + +- debounce-delay-us: minimum wake-up inputs debouncer period in + microseconds. It's usually a board-related property. +- atmel,wakeup-rtc-timer: boolean to enable Real-Time Clock wake-up. + +The node contains child nodes for each wake-up input that the platform uses. + +2) input nodes + +Wake-up input nodes are usually described in the "board" part of the Device +Tree. Note also that input 0 is linked to the wake-up pin and is frequently +used. + +Required properties: +- reg: should contain the wake-up input index [0 - 15]. + +Optional properties: +- atmel,wakeup-active-high: boolean, the corresponding wake-up input described + by the child, forces the wake-up of the core power supply on a high level. + The default is to be active low. + +Example: + +On the SoC side: + shdwc@f8048010 { + compatible = "atmel,sama5d2-shdwc"; + reg = <0xf8048010 0x10>; + clocks = <&clk32k>; + #address-cells = <1>; + #size-cells = <0>; + atmel,wakeup-rtc-timer; + }; + +On the board side: + shdwc@f8048010 { + debounce-delay-us = <976>; + + input@0 { + reg = <0>; + }; + + input@1 { + reg = <1>; + atmel,wakeup-active-high; + }; + }; + Special Function Registers (SFR) Special Function Registers (SFR) manage specific aspects of the integrated diff --git a/MAINTAINERS b/MAINTAINERS index 374ffa2d81b7..bb176dbfe81f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2048,6 +2048,11 @@ M: Nicolas Ferre <nicolas.ferre@atmel.com> S: Supported F: drivers/tty/serial/atmel_serial.c +ATMEL AT91 SAMA5D2-Compatible Shutdown Controller +M: Nicolas Ferre <nicolas.ferre@atmel.com> +S: Supported +F: drivers/power/reset/at91-sama5d2_shdwc.c + ATMEL SAMA5D2 ADC DRIVER M: Ludovic Desroches <ludovic.desroches@atmel.com> L: linux-iio@vger.kernel.org diff --git a/drivers/power/ipaq_micro_battery.c b/drivers/power/ipaq_micro_battery.c index 3f314b1a30d7..35b01c7d775b 100644 --- a/drivers/power/ipaq_micro_battery.c +++ b/drivers/power/ipaq_micro_battery.c @@ -261,7 +261,7 @@ static int micro_batt_probe(struct platform_device *pdev) return 0; ac_err: - power_supply_unregister(micro_ac_power); + power_supply_unregister(micro_batt_power); batt_err: cancel_delayed_work_sync(&mb->update); destroy_workqueue(mb->wq); diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c index 57eb5c2bfc21..3b94620ce5c1 100644 --- a/drivers/power/max8925_power.c +++ b/drivers/power/max8925_power.c @@ -540,14 +540,14 @@ static int max8925_power_probe(struct platform_device *pdev) info->usb = power_supply_register(&pdev->dev, &usb_desc, &psy_cfg); if (IS_ERR(info->usb)) { ret = PTR_ERR(info->usb); - goto out_usb; + goto out_unregister_ac; } info->usb->dev.parent = &pdev->dev; info->battery = power_supply_register(&pdev->dev, &battery_desc, NULL); if (IS_ERR(info->battery)) { ret = PTR_ERR(info->battery); - goto out_battery; + goto out_unregister_usb; } info->battery->dev.parent = &pdev->dev; @@ -560,9 +560,9 @@ static int max8925_power_probe(struct platform_device *pdev) max8925_init_charger(chip, info); return 0; -out_battery: - power_supply_unregister(info->battery); -out_usb: +out_unregister_usb: + power_supply_unregister(info->usb); +out_unregister_ac: power_supply_unregister(info->ac); out: return ret; diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 0a6408a39c66..9bb2622c23bf 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -30,6 +30,14 @@ config POWER_RESET_AT91_RESET This driver supports restart for Atmel AT91SAM9 and SAMA5 SoCs +config POWER_RESET_AT91_SAMA5D2_SHDWC + tristate "Atmel AT91 SAMA5D2-Compatible shutdown controller driver" + depends on ARCH_AT91 || COMPILE_TEST + default SOC_SAMA5 + help + This driver supports the alternate shutdown controller for some Atmel + SAMA5 SoCs. It is present for example on SAMA5D2 SoC. + config POWER_RESET_AXXIA bool "LSI Axxia reset driver" depends on ARCH_AXXIA diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 096fa67047f6..ab7aa8614d1f 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -1,6 +1,7 @@ obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o obj-$(CONFIG_POWER_RESET_AT91_POWEROFF) += at91-poweroff.o obj-$(CONFIG_POWER_RESET_AT91_RESET) += at91-reset.o +obj-$(CONFIG_POWER_RESET_AT91_SAMA5D2_SHDWC) += at91-sama5d2_shdwc.o obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c new file mode 100644 index 000000000000..8a5ac9706c9c --- /dev/null +++ b/drivers/power/reset/at91-sama5d2_shdwc.c @@ -0,0 +1,282 @@ +/* + * Atmel SAMA5D2-Compatible Shutdown Controller (SHDWC) driver. + * Found on some SoCs as the sama5d2 (obviously). + * + * Copyright (C) 2015 Atmel Corporation, + * Nicolas Ferre <nicolas.ferre@atmel.com> + * + * Evolved from driver at91-poweroff.c. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + * + * TODO: + * - addition to status of other wake-up inputs [1 - 15] + * - Analog Comparator wake-up alarm + * - Serial RX wake-up alarm + * - low power debouncer + */ + +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/printk.h> + +#define SLOW_CLOCK_FREQ 32768 + +#define AT91_SHDW_CR 0x00 /* Shut Down Control Register */ +#define AT91_SHDW_SHDW BIT(0) /* Shut Down command */ +#define AT91_SHDW_KEY (0xa5UL << 24) /* KEY Password */ + +#define AT91_SHDW_MR 0x04 /* Shut Down Mode Register */ +#define AT91_SHDW_WKUPDBC_SHIFT 24 +#define AT91_SHDW_WKUPDBC_MASK GENMASK(31, 16) +#define AT91_SHDW_WKUPDBC(x) (((x) << AT91_SHDW_WKUPDBC_SHIFT) \ + & AT91_SHDW_WKUPDBC_MASK) + +#define AT91_SHDW_SR 0x08 /* Shut Down Status Register */ +#define AT91_SHDW_WKUPIS_SHIFT 16 +#define AT91_SHDW_WKUPIS_MASK GENMASK(31, 16) +#define AT91_SHDW_WKUPIS(x) ((1 << (x)) << AT91_SHDW_WKUPIS_SHIFT \ + & AT91_SHDW_WKUPIS_MASK) + +#define AT91_SHDW_WUIR 0x0c /* Shutdown Wake-up Inputs Register */ +#define AT91_SHDW_WKUPEN_MASK GENMASK(15, 0) +#define AT91_SHDW_WKUPEN(x) ((1 << (x)) & AT91_SHDW_WKUPEN_MASK) +#define AT91_SHDW_WKUPT_SHIFT 16 +#define AT91_SHDW_WKUPT_MASK GENMASK(31, 16) +#define AT91_SHDW_WKUPT(x) ((1 << (x)) << AT91_SHDW_WKUPT_SHIFT \ + & AT91_SHDW_WKUPT_MASK) + +#define SHDW_WK_PIN(reg, cfg) ((reg) & AT91_SHDW_WKUPIS((cfg)->wkup_pin_input)) +#define SHDW_RTCWK(reg, cfg) (((reg) >> ((cfg)->sr_rtcwk_shift)) & 0x1) +#define SHDW_RTCWKEN(cfg) (1 << ((cfg)->mr_rtcwk_shift)) + +#define DBC_PERIOD_US(x) DIV_ROUND_UP_ULL((1000000 * (x)), \ + SLOW_CLOCK_FREQ) + +struct shdwc_config { + u8 wkup_pin_input; + u8 mr_rtcwk_shift; + u8 sr_rtcwk_shift; +}; + +struct shdwc { + struct shdwc_config *cfg; + void __iomem *at91_shdwc_base; +}; + +/* + * Hold configuration here, cannot be more than one instance of the driver + * since pm_power_off itself is global. + */ +static struct shdwc *at91_shdwc; +static struct clk *sclk; + +static const unsigned long long sdwc_dbc_period[] = { + 0, 3, 32, 512, 4096, 32768, +}; + +static void __init at91_wakeup_status(struct platform_device *pdev) +{ + struct shdwc *shdw = platform_get_drvdata(pdev); + u32 reg; + char *reason = "unknown"; + + reg = readl(shdw->at91_shdwc_base + AT91_SHDW_SR); + + dev_dbg(&pdev->dev, "%s: status = %#x\n", __func__, reg); + + /* Simple power-on, just bail out */ + if (!reg) + return; + + if (SHDW_WK_PIN(reg, shdw->cfg)) + reason = "WKUP pin"; + else if (SHDW_RTCWK(reg, shdw->cfg)) + reason = "RTC"; + + pr_info("AT91: Wake-Up source: %s\n", reason); +} + +static void at91_poweroff(void) +{ + writel(AT91_SHDW_KEY | AT91_SHDW_SHDW, + at91_shdwc->at91_shdwc_base + AT91_SHDW_CR); +} + +static u32 at91_shdwc_debouncer_value(struct platform_device *pdev, + u32 in_period_us) +{ + int i; + int max_idx = ARRAY_SIZE(sdwc_dbc_period) - 1; + unsigned long long period_us; + unsigned long long max_period_us = DBC_PERIOD_US(sdwc_dbc_period[max_idx]); + + if (in_period_us > max_period_us) { + dev_warn(&pdev->dev, + "debouncer period %u too big, reduced to %llu us\n", + in_period_us, max_period_us); + return max_idx; + } + + for (i = max_idx - 1; i > 0; i--) { + period_us = DBC_PERIOD_US(sdwc_dbc_period[i]); + dev_dbg(&pdev->dev, "%s: ref[%d] = %llu\n", + __func__, i, period_us); + if (in_period_us > period_us) + break; + } + + return i + 1; +} + +static u32 at91_shdwc_get_wakeup_input(struct platform_device *pdev, + struct device_node *np) +{ + struct device_node *cnp; + u32 wk_input_mask; + u32 wuir = 0; + u32 wk_input; + + for_each_child_of_node(np, cnp) { + if (of_property_read_u32(cnp, "reg", &wk_input)) { + dev_warn(&pdev->dev, "reg property is missing for %s\n", + cnp->full_name); + continue; + } + + wk_input_mask = 1 << wk_input; + if (!(wk_input_mask & AT91_SHDW_WKUPEN_MASK)) { + dev_warn(&pdev->dev, + "wake-up input %d out of bounds ignore\n", + wk_input); + continue; + } + wuir |= wk_input_mask; + + if (of_property_read_bool(cnp, "atmel,wakeup-active-high")) + wuir |= AT91_SHDW_WKUPT(wk_input); + + dev_dbg(&pdev->dev, "%s: (child %d) wuir = %#x\n", + __func__, wk_input, wuir); + } + + return wuir; +} + +static void at91_shdwc_dt_configure(struct platform_device *pdev) +{ + struct shdwc *shdw = platform_get_drvdata(pdev); + struct device_node *np = pdev->dev.of_node; + u32 mode = 0, tmp, input; + + if (!np) { + dev_err(&pdev->dev, "device node not found\n"); + return; + } + + if (!of_property_read_u32(np, "debounce-delay-us", &tmp)) + mode |= AT91_SHDW_WKUPDBC(at91_shdwc_debouncer_value(pdev, tmp)); + + if (of_property_read_bool(np, "atmel,wakeup-rtc-timer")) + mode |= SHDW_RTCWKEN(shdw->cfg); + + dev_dbg(&pdev->dev, "%s: mode = %#x\n", __func__, mode); + writel(mode, shdw->at91_shdwc_base + AT91_SHDW_MR); + + input = at91_shdwc_get_wakeup_input(pdev, np); + writel(input, shdw->at91_shdwc_base + AT91_SHDW_WUIR); +} + +static const struct shdwc_config sama5d2_shdwc_config = { + .wkup_pin_input = 0, + .mr_rtcwk_shift = 17, + .sr_rtcwk_shift = 5, +}; + +static const struct of_device_id at91_shdwc_of_match[] = { + { + .compatible = "atmel,sama5d2-shdwc", + .data = &sama5d2_shdwc_config, + }, { + /*sentinel*/ + } +}; +MODULE_DEVICE_TABLE(of, at91_shdwc_of_match); + +static int __init at91_shdwc_probe(struct platform_device *pdev) +{ + struct resource *res; + const struct of_device_id *match; + int ret; + + if (!pdev->dev.of_node) + return -ENODEV; + + at91_shdwc = devm_kzalloc(&pdev->dev, sizeof(*at91_shdwc), GFP_KERNEL); + if (!at91_shdwc) + return -ENOMEM; + + platform_set_drvdata(pdev, at91_shdwc); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + at91_shdwc->at91_shdwc_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(at91_shdwc->at91_shdwc_base)) { + dev_err(&pdev->dev, "Could not map reset controller address\n"); + return PTR_ERR(at91_shdwc->at91_shdwc_base); + } + + match = of_match_node(at91_shdwc_of_match, pdev->dev.of_node); + at91_shdwc->cfg = (struct shdwc_config *)(match->data); + + sclk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(sclk)) + return PTR_ERR(sclk); + + ret = clk_prepare_enable(sclk); + if (ret) { + dev_err(&pdev->dev, "Could not enable slow clock\n"); + return ret; + } + + at91_wakeup_status(pdev); + + at91_shdwc_dt_configure(pdev); + + pm_power_off = at91_poweroff; + + return 0; +} + +static int __exit at91_shdwc_remove(struct platform_device *pdev) +{ + struct shdwc *shdw = platform_get_drvdata(pdev); + + if (pm_power_off == at91_poweroff) + pm_power_off = NULL; + + /* Reset values to disable wake-up features */ + writel(0, shdw->at91_shdwc_base + AT91_SHDW_MR); + writel(0, shdw->at91_shdwc_base + AT91_SHDW_WUIR); + + clk_disable_unprepare(sclk); + + return 0; +} + +static struct platform_driver at91_shdwc_driver = { + .remove = __exit_p(at91_shdwc_remove), + .driver = { + .name = "at91-shdwc", + .of_match_table = at91_shdwc_of_match, + }, +}; +module_platform_driver_probe(at91_shdwc_driver, at91_shdwc_probe); + +MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>"); +MODULE_DESCRIPTION("Atmel shutdown controller driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/power/sbs-battery.c b/drivers/power/sbs-battery.c index d6226d68b574..768b9fcb58ea 100644 --- a/drivers/power/sbs-battery.c +++ b/drivers/power/sbs-battery.c @@ -382,8 +382,6 @@ static int sbs_get_battery_property(struct i2c_client *client, if (ret & BATTERY_FULL_CHARGED) val->intval = POWER_SUPPLY_STATUS_FULL; - else if (ret & BATTERY_FULL_DISCHARGED) - val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (ret & BATTERY_DISCHARGING) val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else @@ -702,8 +700,6 @@ static void sbs_delayed_work(struct work_struct *work) if (ret & BATTERY_FULL_CHARGED) ret = POWER_SUPPLY_STATUS_FULL; - else if (ret & BATTERY_FULL_DISCHARGED) - ret = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (ret & BATTERY_DISCHARGING) ret = POWER_SUPPLY_STATUS_DISCHARGING; else |