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authorLinus Torvalds <torvalds@linux-foundation.org>2023-02-20 15:28:57 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2023-02-20 15:28:57 -0800
commitff0c7e18629b8bd64681313a88ce55e182c9fee6 (patch)
tree70efa650f6458514e1d7e5e3f72cc8f87fc5cf2c /drivers/w1
parent5b0ed5964928b0aaf0d644c17c886c7f5ea4bb3f (diff)
parenta1f925bc4fa899b3c0f2dcbc432d572c36e74e71 (diff)
Merge tag 'arm-boardfile-remove-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC boardfile updates from Arnd Bergmann "Unused boardfile removal for 6.3 This is a follow-up to the deprecation of most of the old-style board files that was merged in linux-6.0, removing them for good. This branch is almost exclusively dead code removal based on those annotations. Some device driver removals went through separate subsystem trees, but the majority is in the same branch, in order to better handle dependencies between the patches and avoid breaking bisection. Unfortunately that leads to merge conflicts against other changes in the subsystem trees, but they should all be trivial to resolve by removing the files. See commit 7d0d3fa7339e ("Merge tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc") for the description of which machines were marked unused and are now removed. The only removals that got postponed are Terastation WXL (mv78xx0) and Jornada720 (StrongARM1100), which turned out to still have potential users" * tag 'arm-boardfile-remove-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (91 commits) mmc: omap: drop TPS65010 dependency ARM: pxa: restore mfp-pxa320.h usb: ohci-omap: avoid unused-variable warning ARM: debug: remove references in DEBUG_UART_8250_SHIFT to removed configs ARM: s3c: remove obsolete s3c-cpu-freq header MAINTAINERS: adjust SAMSUNG SOC CLOCK DRIVERS after s3c24xx support removal MAINTAINERS: update file entries after arm multi-platform rework and mach-pxa removal ARM: remove CONFIG_UNUSED_BOARD_FILES mfd: remove htc-pasic3 driver w1: remove ds1wm driver usb: remove ohci-tmio driver fbdev: remove w100fb driver fbdev: remove tmiofb driver mmc: remove tmio_mmc driver mfd: remove ucb1400 support mfd: remove toshiba tmio drivers rtc: remove v3020 driver power: remove pda_power supply driver ASoC: pxa: remove unused board support pcmcia: remove unused pxa/sa1100 drivers ...
Diffstat (limited to 'drivers/w1')
-rw-r--r--drivers/w1/masters/Kconfig7
-rw-r--r--drivers/w1/masters/Makefile1
-rw-r--r--drivers/w1/masters/ds1wm.c675
3 files changed, 0 insertions, 683 deletions
diff --git a/drivers/w1/masters/Kconfig b/drivers/w1/masters/Kconfig
index 24b9a8e05f64..692cac3ff0ee 100644
--- a/drivers/w1/masters/Kconfig
+++ b/drivers/w1/masters/Kconfig
@@ -41,13 +41,6 @@ config W1_MASTER_MXC
help
Say Y here to enable MXC 1-wire host
-config W1_MASTER_DS1WM
- tristate "Maxim DS1WM 1-wire busmaster"
- help
- Say Y here to enable the DS1WM 1-wire driver, such as that
- in HP iPAQ devices like h5xxx, h2200, and ASIC3-based like
- hx4700.
-
config W1_MASTER_GPIO
tristate "GPIO 1-wire busmaster"
depends on GPIOLIB || COMPILE_TEST
diff --git a/drivers/w1/masters/Makefile b/drivers/w1/masters/Makefile
index dae629b7ab49..c5d85a827e52 100644
--- a/drivers/w1/masters/Makefile
+++ b/drivers/w1/masters/Makefile
@@ -8,7 +8,6 @@ obj-$(CONFIG_W1_MASTER_DS2490) += ds2490.o
obj-$(CONFIG_W1_MASTER_DS2482) += ds2482.o
obj-$(CONFIG_W1_MASTER_MXC) += mxc_w1.o
-obj-$(CONFIG_W1_MASTER_DS1WM) += ds1wm.o
obj-$(CONFIG_W1_MASTER_GPIO) += w1-gpio.o
obj-$(CONFIG_HDQ_MASTER_OMAP) += omap_hdq.o
obj-$(CONFIG_W1_MASTER_SGI) += sgi_w1.o
diff --git a/drivers/w1/masters/ds1wm.c b/drivers/w1/masters/ds1wm.c
deleted file mode 100644
index f661695fb589..000000000000
--- a/drivers/w1/masters/ds1wm.c
+++ /dev/null
@@ -1,675 +0,0 @@
-/*
- * 1-wire busmaster driver for DS1WM and ASICs with embedded DS1WMs
- * such as HP iPAQs (including h5xxx, h2200, and devices with ASIC3
- * like hx4700).
- *
- * Copyright (c) 2004-2005, Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
- * Copyright (c) 2004-2007, Matt Reimer <mreimer@vpop.net>
- *
- * Use consistent with the GNU GPL is permitted,
- * provided that this copyright notice is
- * preserved in its entirety in all copies and derived works.
- */
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/pm.h>
-#include <linux/platform_device.h>
-#include <linux/err.h>
-#include <linux/delay.h>
-#include <linux/mfd/core.h>
-#include <linux/mfd/ds1wm.h>
-#include <linux/slab.h>
-
-#include <asm/io.h>
-
-#include <linux/w1.h>
-
-
-#define DS1WM_CMD 0x00 /* R/W 4 bits command */
-#define DS1WM_DATA 0x01 /* R/W 8 bits, transmit/receive buffer */
-#define DS1WM_INT 0x02 /* R/W interrupt status */
-#define DS1WM_INT_EN 0x03 /* R/W interrupt enable */
-#define DS1WM_CLKDIV 0x04 /* R/W 5 bits of divisor and pre-scale */
-#define DS1WM_CNTRL 0x05 /* R/W master control register (not used yet) */
-
-#define DS1WM_CMD_1W_RESET (1 << 0) /* force reset on 1-wire bus */
-#define DS1WM_CMD_SRA (1 << 1) /* enable Search ROM accelerator mode */
-#define DS1WM_CMD_DQ_OUTPUT (1 << 2) /* write only - forces bus low */
-#define DS1WM_CMD_DQ_INPUT (1 << 3) /* read only - reflects state of bus */
-#define DS1WM_CMD_RST (1 << 5) /* software reset */
-#define DS1WM_CMD_OD (1 << 7) /* overdrive */
-
-#define DS1WM_INT_PD (1 << 0) /* presence detect */
-#define DS1WM_INT_PDR (1 << 1) /* presence detect result */
-#define DS1WM_INT_TBE (1 << 2) /* tx buffer empty */
-#define DS1WM_INT_TSRE (1 << 3) /* tx shift register empty */
-#define DS1WM_INT_RBF (1 << 4) /* rx buffer full */
-#define DS1WM_INT_RSRF (1 << 5) /* rx shift register full */
-
-#define DS1WM_INTEN_EPD (1 << 0) /* enable presence detect int */
-#define DS1WM_INTEN_IAS (1 << 1) /* INTR active state */
-#define DS1WM_INTEN_ETBE (1 << 2) /* enable tx buffer empty int */
-#define DS1WM_INTEN_ETMT (1 << 3) /* enable tx shift register empty int */
-#define DS1WM_INTEN_ERBF (1 << 4) /* enable rx buffer full int */
-#define DS1WM_INTEN_ERSRF (1 << 5) /* enable rx shift register full int */
-#define DS1WM_INTEN_DQO (1 << 6) /* enable direct bus driving ops */
-
-#define DS1WM_INTEN_NOT_IAS (~DS1WM_INTEN_IAS) /* all but INTR active state */
-
-#define DS1WM_TIMEOUT (HZ * 5)
-
-static struct {
- unsigned long freq;
- unsigned long divisor;
-} freq[] = {
- { 1000000, 0x80 },
- { 2000000, 0x84 },
- { 3000000, 0x81 },
- { 4000000, 0x88 },
- { 5000000, 0x82 },
- { 6000000, 0x85 },
- { 7000000, 0x83 },
- { 8000000, 0x8c },
- { 10000000, 0x86 },
- { 12000000, 0x89 },
- { 14000000, 0x87 },
- { 16000000, 0x90 },
- { 20000000, 0x8a },
- { 24000000, 0x8d },
- { 28000000, 0x8b },
- { 32000000, 0x94 },
- { 40000000, 0x8e },
- { 48000000, 0x91 },
- { 56000000, 0x8f },
- { 64000000, 0x98 },
- { 80000000, 0x92 },
- { 96000000, 0x95 },
- { 112000000, 0x93 },
- { 128000000, 0x9c },
-/* you can continue this table, consult the OPERATION - CLOCK DIVISOR
- section of the ds1wm spec sheet. */
-};
-
-struct ds1wm_data {
- void __iomem *map;
- unsigned int bus_shift; /* # of shifts to calc register offsets */
- bool is_hw_big_endian;
- struct platform_device *pdev;
- const struct mfd_cell *cell;
- int irq;
- int slave_present;
- void *reset_complete;
- void *read_complete;
- void *write_complete;
- int read_error;
- /* last byte received */
- u8 read_byte;
- /* byte to write that makes all intr disabled, */
- /* considering active_state (IAS) (optimization) */
- u8 int_en_reg_none;
- unsigned int reset_recover_delay; /* see ds1wm.h */
-};
-
-static inline void ds1wm_write_register(struct ds1wm_data *ds1wm_data, u32 reg,
- u8 val)
-{
- if (ds1wm_data->is_hw_big_endian) {
- switch (ds1wm_data->bus_shift) {
- case 0:
- iowrite8(val, ds1wm_data->map + (reg << 0));
- break;
- case 1:
- iowrite16be((u16)val, ds1wm_data->map + (reg << 1));
- break;
- case 2:
- iowrite32be((u32)val, ds1wm_data->map + (reg << 2));
- break;
- }
- } else {
- switch (ds1wm_data->bus_shift) {
- case 0:
- iowrite8(val, ds1wm_data->map + (reg << 0));
- break;
- case 1:
- iowrite16((u16)val, ds1wm_data->map + (reg << 1));
- break;
- case 2:
- iowrite32((u32)val, ds1wm_data->map + (reg << 2));
- break;
- }
- }
-}
-
-static inline u8 ds1wm_read_register(struct ds1wm_data *ds1wm_data, u32 reg)
-{
- u32 val = 0;
-
- if (ds1wm_data->is_hw_big_endian) {
- switch (ds1wm_data->bus_shift) {
- case 0:
- val = ioread8(ds1wm_data->map + (reg << 0));
- break;
- case 1:
- val = ioread16be(ds1wm_data->map + (reg << 1));
- break;
- case 2:
- val = ioread32be(ds1wm_data->map + (reg << 2));
- break;
- }
- } else {
- switch (ds1wm_data->bus_shift) {
- case 0:
- val = ioread8(ds1wm_data->map + (reg << 0));
- break;
- case 1:
- val = ioread16(ds1wm_data->map + (reg << 1));
- break;
- case 2:
- val = ioread32(ds1wm_data->map + (reg << 2));
- break;
- }
- }
- dev_dbg(&ds1wm_data->pdev->dev,
- "ds1wm_read_register reg: %d, 32 bit val:%x\n", reg, val);
- return (u8)val;
-}
-
-
-static irqreturn_t ds1wm_isr(int isr, void *data)
-{
- struct ds1wm_data *ds1wm_data = data;
- u8 intr;
- u8 inten = ds1wm_read_register(ds1wm_data, DS1WM_INT_EN);
- /* if no bits are set in int enable register (except the IAS)
- than go no further, reading the regs below has side effects */
- if (!(inten & DS1WM_INTEN_NOT_IAS))
- return IRQ_NONE;
-
- ds1wm_write_register(ds1wm_data,
- DS1WM_INT_EN, ds1wm_data->int_en_reg_none);
-
- /* this read action clears the INTR and certain flags in ds1wm */
- intr = ds1wm_read_register(ds1wm_data, DS1WM_INT);
-
- ds1wm_data->slave_present = (intr & DS1WM_INT_PDR) ? 0 : 1;
-
- if ((intr & DS1WM_INT_TSRE) && ds1wm_data->write_complete) {
- inten &= ~DS1WM_INTEN_ETMT;
- complete(ds1wm_data->write_complete);
- }
- if (intr & DS1WM_INT_RBF) {
- /* this read clears the RBF flag */
- ds1wm_data->read_byte = ds1wm_read_register(ds1wm_data,
- DS1WM_DATA);
- inten &= ~DS1WM_INTEN_ERBF;
- if (ds1wm_data->read_complete)
- complete(ds1wm_data->read_complete);
- }
- if ((intr & DS1WM_INT_PD) && ds1wm_data->reset_complete) {
- inten &= ~DS1WM_INTEN_EPD;
- complete(ds1wm_data->reset_complete);
- }
-
- ds1wm_write_register(ds1wm_data, DS1WM_INT_EN, inten);
- return IRQ_HANDLED;
-}
-
-static int ds1wm_reset(struct ds1wm_data *ds1wm_data)
-{
- unsigned long timeleft;
- DECLARE_COMPLETION_ONSTACK(reset_done);
-
- ds1wm_data->reset_complete = &reset_done;
-
- /* enable Presence detect only */
- ds1wm_write_register(ds1wm_data, DS1WM_INT_EN, DS1WM_INTEN_EPD |
- ds1wm_data->int_en_reg_none);
-
- ds1wm_write_register(ds1wm_data, DS1WM_CMD, DS1WM_CMD_1W_RESET);
-
- timeleft = wait_for_completion_timeout(&reset_done, DS1WM_TIMEOUT);
- ds1wm_data->reset_complete = NULL;
- if (!timeleft) {
- dev_err(&ds1wm_data->pdev->dev, "reset failed, timed out\n");
- return 1;
- }
-
- if (!ds1wm_data->slave_present) {
- dev_dbg(&ds1wm_data->pdev->dev, "reset: no devices found\n");
- return 1;
- }
-
- if (ds1wm_data->reset_recover_delay)
- msleep(ds1wm_data->reset_recover_delay);
-
- return 0;
-}
-
-static int ds1wm_write(struct ds1wm_data *ds1wm_data, u8 data)
-{
- unsigned long timeleft;
- DECLARE_COMPLETION_ONSTACK(write_done);
- ds1wm_data->write_complete = &write_done;
-
- ds1wm_write_register(ds1wm_data, DS1WM_INT_EN,
- ds1wm_data->int_en_reg_none | DS1WM_INTEN_ETMT);
-
- ds1wm_write_register(ds1wm_data, DS1WM_DATA, data);
-
- timeleft = wait_for_completion_timeout(&write_done, DS1WM_TIMEOUT);
-
- ds1wm_data->write_complete = NULL;
- if (!timeleft) {
- dev_err(&ds1wm_data->pdev->dev, "write failed, timed out\n");
- return -ETIMEDOUT;
- }
-
- return 0;
-}
-
-static u8 ds1wm_read(struct ds1wm_data *ds1wm_data, unsigned char write_data)
-{
- unsigned long timeleft;
- u8 intEnable = DS1WM_INTEN_ERBF | ds1wm_data->int_en_reg_none;
- DECLARE_COMPLETION_ONSTACK(read_done);
-
- ds1wm_read_register(ds1wm_data, DS1WM_DATA);
-
- ds1wm_data->read_complete = &read_done;
- ds1wm_write_register(ds1wm_data, DS1WM_INT_EN, intEnable);
-
- ds1wm_write_register(ds1wm_data, DS1WM_DATA, write_data);
- timeleft = wait_for_completion_timeout(&read_done, DS1WM_TIMEOUT);
-
- ds1wm_data->read_complete = NULL;
- if (!timeleft) {
- dev_err(&ds1wm_data->pdev->dev, "read failed, timed out\n");
- ds1wm_data->read_error = -ETIMEDOUT;
- return 0xFF;
- }
- ds1wm_data->read_error = 0;
- return ds1wm_data->read_byte;
-}
-
-static int ds1wm_find_divisor(int gclk)
-{
- int i;
-
- for (i = ARRAY_SIZE(freq)-1; i >= 0; --i)
- if (gclk >= freq[i].freq)
- return freq[i].divisor;
-
- return 0;
-}
-
-static void ds1wm_up(struct ds1wm_data *ds1wm_data)
-{
- int divisor;
- struct device *dev = &ds1wm_data->pdev->dev;
- struct ds1wm_driver_data *plat = dev_get_platdata(dev);
-
- if (ds1wm_data->cell->enable)
- ds1wm_data->cell->enable(ds1wm_data->pdev);
-
- divisor = ds1wm_find_divisor(plat->clock_rate);
- dev_dbg(dev, "found divisor 0x%x for clock %d\n",
- divisor, plat->clock_rate);
- if (divisor == 0) {
- dev_err(dev, "no suitable divisor for %dHz clock\n",
- plat->clock_rate);
- return;
- }
- ds1wm_write_register(ds1wm_data, DS1WM_CLKDIV, divisor);
-
- /* Let the w1 clock stabilize. */
- msleep(1);
-
- ds1wm_reset(ds1wm_data);
-}
-
-static void ds1wm_down(struct ds1wm_data *ds1wm_data)
-{
- ds1wm_reset(ds1wm_data);
-
- /* Disable interrupts. */
- ds1wm_write_register(ds1wm_data, DS1WM_INT_EN,
- ds1wm_data->int_en_reg_none);
-
- if (ds1wm_data->cell->disable)
- ds1wm_data->cell->disable(ds1wm_data->pdev);
-}
-
-/* --------------------------------------------------------------------- */
-/* w1 methods */
-
-static u8 ds1wm_read_byte(void *data)
-{
- struct ds1wm_data *ds1wm_data = data;
-
- return ds1wm_read(ds1wm_data, 0xff);
-}
-
-static void ds1wm_write_byte(void *data, u8 byte)
-{
- struct ds1wm_data *ds1wm_data = data;
-
- ds1wm_write(ds1wm_data, byte);
-}
-
-static u8 ds1wm_reset_bus(void *data)
-{
- struct ds1wm_data *ds1wm_data = data;
-
- ds1wm_reset(ds1wm_data);
-
- return 0;
-}
-
-static void ds1wm_search(void *data, struct w1_master *master_dev,
- u8 search_type, w1_slave_found_callback slave_found)
-{
- struct ds1wm_data *ds1wm_data = data;
- int i;
- int ms_discrep_bit = -1;
- u64 r = 0; /* holds the progress of the search */
- u64 r_prime, d;
- unsigned slaves_found = 0;
- unsigned int pass = 0;
-
- dev_dbg(&ds1wm_data->pdev->dev, "search begin\n");
- while (true) {
- ++pass;
- if (pass > 100) {
- dev_dbg(&ds1wm_data->pdev->dev,
- "too many attempts (100), search aborted\n");
- return;
- }
-
- mutex_lock(&master_dev->bus_mutex);
- if (ds1wm_reset(ds1wm_data)) {
- mutex_unlock(&master_dev->bus_mutex);
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d reset error (or no slaves)\n", pass);
- break;
- }
-
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d r : %0#18llx writing SEARCH_ROM\n", pass, r);
- ds1wm_write(ds1wm_data, search_type);
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d entering ASM\n", pass);
- ds1wm_write_register(ds1wm_data, DS1WM_CMD, DS1WM_CMD_SRA);
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d beginning nibble loop\n", pass);
-
- r_prime = 0;
- d = 0;
- /* we work one nibble at a time */
- /* each nibble is interleaved to form a byte */
- for (i = 0; i < 16; i++) {
-
- unsigned char resp, _r, _r_prime, _d;
-
- _r = (r >> (4*i)) & 0xf;
- _r = ((_r & 0x1) << 1) |
- ((_r & 0x2) << 2) |
- ((_r & 0x4) << 3) |
- ((_r & 0x8) << 4);
-
- /* writes _r, then reads back: */
- resp = ds1wm_read(ds1wm_data, _r);
-
- if (ds1wm_data->read_error) {
- dev_err(&ds1wm_data->pdev->dev,
- "pass: %d nibble: %d read error\n", pass, i);
- break;
- }
-
- _r_prime = ((resp & 0x02) >> 1) |
- ((resp & 0x08) >> 2) |
- ((resp & 0x20) >> 3) |
- ((resp & 0x80) >> 4);
-
- _d = ((resp & 0x01) >> 0) |
- ((resp & 0x04) >> 1) |
- ((resp & 0x10) >> 2) |
- ((resp & 0x40) >> 3);
-
- r_prime |= (unsigned long long) _r_prime << (i * 4);
- d |= (unsigned long long) _d << (i * 4);
-
- }
- if (ds1wm_data->read_error) {
- mutex_unlock(&master_dev->bus_mutex);
- dev_err(&ds1wm_data->pdev->dev,
- "pass: %d read error, retrying\n", pass);
- break;
- }
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d r\': %0#18llx d:%0#18llx\n",
- pass, r_prime, d);
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d nibble loop complete, exiting ASM\n", pass);
- ds1wm_write_register(ds1wm_data, DS1WM_CMD, ~DS1WM_CMD_SRA);
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d resetting bus\n", pass);
- ds1wm_reset(ds1wm_data);
- mutex_unlock(&master_dev->bus_mutex);
- if ((r_prime & ((u64)1 << 63)) && (d & ((u64)1 << 63))) {
- dev_err(&ds1wm_data->pdev->dev,
- "pass: %d bus error, retrying\n", pass);
- continue; /* start over */
- }
-
-
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d found %0#18llx\n", pass, r_prime);
- slave_found(master_dev, r_prime);
- ++slaves_found;
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d complete, preparing next pass\n", pass);
-
- /* any discrepency found which we already choose the
- '1' branch is now is now irrelevant we reveal the
- next branch with this: */
- d &= ~r;
- /* find last bit set, i.e. the most signif. bit set */
- ms_discrep_bit = fls64(d) - 1;
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d new d:%0#18llx MS discrep bit:%d\n",
- pass, d, ms_discrep_bit);
-
- /* prev_ms_discrep_bit = ms_discrep_bit;
- prepare for next ROM search: */
- if (ms_discrep_bit == -1)
- break;
-
- r = (r & ~(~0ull << (ms_discrep_bit))) | 1 << ms_discrep_bit;
- } /* end while true */
- dev_dbg(&ds1wm_data->pdev->dev,
- "pass: %d total: %d search done ms d bit pos: %d\n", pass,
- slaves_found, ms_discrep_bit);
-}
-
-/* --------------------------------------------------------------------- */
-
-static struct w1_bus_master ds1wm_master = {
- .read_byte = ds1wm_read_byte,
- .write_byte = ds1wm_write_byte,
- .reset_bus = ds1wm_reset_bus,
- .search = ds1wm_search,
-};
-
-static int ds1wm_probe(struct platform_device *pdev)
-{
- struct ds1wm_data *ds1wm_data;
- struct ds1wm_driver_data *plat;
- struct resource *res;
- int ret;
- u8 inten;
-
- if (!pdev)
- return -ENODEV;
-
- ds1wm_data = devm_kzalloc(&pdev->dev, sizeof(*ds1wm_data), GFP_KERNEL);
- if (!ds1wm_data)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, ds1wm_data);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENXIO;
- ds1wm_data->map = devm_ioremap(&pdev->dev, res->start,
- resource_size(res));
- if (!ds1wm_data->map)
- return -ENOMEM;
-
- ds1wm_data->pdev = pdev;
- ds1wm_data->cell = mfd_get_cell(pdev);
- if (!ds1wm_data->cell)
- return -ENODEV;
- plat = dev_get_platdata(&pdev->dev);
- if (!plat)
- return -ENODEV;
-
- /* how many bits to shift register number to get register offset */
- if (plat->bus_shift > 2) {
- dev_err(&ds1wm_data->pdev->dev,
- "illegal bus shift %d, not written",
- ds1wm_data->bus_shift);
- return -EINVAL;
- }
-
- ds1wm_data->bus_shift = plat->bus_shift;
- /* make sure resource has space for 8 registers */
- if ((8 << ds1wm_data->bus_shift) > resource_size(res)) {
- dev_err(&ds1wm_data->pdev->dev,
- "memory resource size %d to small, should be %d\n",
- (int)resource_size(res),
- 8 << ds1wm_data->bus_shift);
- return -EINVAL;
- }
-
- ds1wm_data->is_hw_big_endian = plat->is_hw_big_endian;
-
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res)
- return -ENXIO;
- ds1wm_data->irq = res->start;
- ds1wm_data->int_en_reg_none = (plat->active_high ? DS1WM_INTEN_IAS : 0);
- ds1wm_data->reset_recover_delay = plat->reset_recover_delay;
-
- /* Mask interrupts, set IAS before claiming interrupt */
- inten = ds1wm_read_register(ds1wm_data, DS1WM_INT_EN);
- ds1wm_write_register(ds1wm_data,
- DS1WM_INT_EN, ds1wm_data->int_en_reg_none);
-
- if (res->flags & IORESOURCE_IRQ_HIGHEDGE)
- irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_EDGE_RISING);
- if (res->flags & IORESOURCE_IRQ_LOWEDGE)
- irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_EDGE_FALLING);
- if (res->flags & IORESOURCE_IRQ_HIGHLEVEL)
- irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_LEVEL_HIGH);
- if (res->flags & IORESOURCE_IRQ_LOWLEVEL)
- irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_LEVEL_LOW);
-
- ret = devm_request_irq(&pdev->dev, ds1wm_data->irq, ds1wm_isr,
- IRQF_SHARED, "ds1wm", ds1wm_data);
- if (ret) {
- dev_err(&ds1wm_data->pdev->dev,
- "devm_request_irq %d failed with errno %d\n",
- ds1wm_data->irq,
- ret);
-
- return ret;
- }
-
- ds1wm_up(ds1wm_data);
-
- ds1wm_master.data = (void *)ds1wm_data;
-
- ret = w1_add_master_device(&ds1wm_master);
- if (ret)
- goto err;
-
- dev_dbg(&ds1wm_data->pdev->dev,
- "ds1wm: probe successful, IAS: %d, rec.delay: %d, clockrate: %d, bus-shift: %d, is Hw Big Endian: %d\n",
- plat->active_high,
- plat->reset_recover_delay,
- plat->clock_rate,
- ds1wm_data->bus_shift,
- ds1wm_data->is_hw_big_endian);
- return 0;
-
-err:
- ds1wm_down(ds1wm_data);
-
- return ret;
-}
-
-#ifdef CONFIG_PM
-static int ds1wm_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct ds1wm_data *ds1wm_data = platform_get_drvdata(pdev);
-
- ds1wm_down(ds1wm_data);
-
- return 0;
-}
-
-static int ds1wm_resume(struct platform_device *pdev)
-{
- struct ds1wm_data *ds1wm_data = platform_get_drvdata(pdev);
-
- ds1wm_up(ds1wm_data);
-
- return 0;
-}
-#else
-#define ds1wm_suspend NULL
-#define ds1wm_resume NULL
-#endif
-
-static int ds1wm_remove(struct platform_device *pdev)
-{
- struct ds1wm_data *ds1wm_data = platform_get_drvdata(pdev);
-
- w1_remove_master_device(&ds1wm_master);
- ds1wm_down(ds1wm_data);
-
- return 0;
-}
-
-static struct platform_driver ds1wm_driver = {
- .driver = {
- .name = "ds1wm",
- },
- .probe = ds1wm_probe,
- .remove = ds1wm_remove,
- .suspend = ds1wm_suspend,
- .resume = ds1wm_resume
-};
-
-static int __init ds1wm_init(void)
-{
- pr_info("DS1WM w1 busmaster driver - (c) 2004 Szabolcs Gyurko\n");
- return platform_driver_register(&ds1wm_driver);
-}
-
-static void __exit ds1wm_exit(void)
-{
- platform_driver_unregister(&ds1wm_driver);
-}
-
-module_init(ds1wm_init);
-module_exit(ds1wm_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, "
- "Matt Reimer <mreimer@vpop.net>,"
- "Jean-Francois Dagenais <dagenaisj@sonatest.com>");
-MODULE_DESCRIPTION("DS1WM w1 busmaster driver");