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linux/drivers/mfd/wm831x-core.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

1738 lines
35 KiB
C
Raw Blame History

/*
* wm831x-core.c -- Device access for Wolfson WM831x PMICs
*
* Copyright 2009 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/bcd.h>
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/slab.h>
#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/pdata.h>
#include <linux/mfd/wm831x/irq.h>
#include <linux/mfd/wm831x/auxadc.h>
#include <linux/mfd/wm831x/otp.h>
#include <linux/mfd/wm831x/regulator.h>
/* Current settings - values are 2*2^(reg_val/4) microamps. These are
* exported since they are used by multiple drivers.
*/
int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL + 1] = {
2,
2,
3,
3,
4,
5,
6,
7,
8,
10,
11,
13,
16,
19,
23,
27,
32,
38,
45,
54,
64,
76,
91,
108,
128,
152,
181,
215,
256,
304,
362,
431,
512,
609,
724,
861,
1024,
1218,
1448,
1722,
2048,
2435,
2896,
3444,
4096,
4871,
5793,
6889,
8192,
9742,
11585,
13777,
16384,
19484,
23170,
27554,
};
EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
enum wm831x_parent {
WM8310 = 0x8310,
WM8311 = 0x8311,
WM8312 = 0x8312,
WM8320 = 0x8320,
};
static int wm831x_reg_locked(struct wm831x *wm831x, unsigned short reg)
{
if (!wm831x->locked)
return 0;
switch (reg) {
case WM831X_WATCHDOG:
case WM831X_DC4_CONTROL:
case WM831X_ON_PIN_CONTROL:
case WM831X_BACKUP_CHARGER_CONTROL:
case WM831X_CHARGER_CONTROL_1:
case WM831X_CHARGER_CONTROL_2:
return 1;
default:
return 0;
}
}
/**
* wm831x_reg_unlock: Unlock user keyed registers
*
* The WM831x has a user key preventing writes to particularly
* critical registers. This function locks those registers,
* allowing writes to them.
*/
void wm831x_reg_lock(struct wm831x *wm831x)
{
int ret;
ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
if (ret == 0) {
dev_vdbg(wm831x->dev, "Registers locked\n");
mutex_lock(&wm831x->io_lock);
WARN_ON(wm831x->locked);
wm831x->locked = 1;
mutex_unlock(&wm831x->io_lock);
} else {
dev_err(wm831x->dev, "Failed to lock registers: %d\n", ret);
}
}
EXPORT_SYMBOL_GPL(wm831x_reg_lock);
/**
* wm831x_reg_unlock: Unlock user keyed registers
*
* The WM831x has a user key preventing writes to particularly
* critical registers. This function locks those registers,
* preventing spurious writes.
*/
int wm831x_reg_unlock(struct wm831x *wm831x)
{
int ret;
/* 0x9716 is the value required to unlock the registers */
ret = wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0x9716);
if (ret == 0) {
dev_vdbg(wm831x->dev, "Registers unlocked\n");
mutex_lock(&wm831x->io_lock);
WARN_ON(!wm831x->locked);
wm831x->locked = 0;
mutex_unlock(&wm831x->io_lock);
}
return ret;
}
EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
static int wm831x_read(struct wm831x *wm831x, unsigned short reg,
int bytes, void *dest)
{
int ret, i;
u16 *buf = dest;
BUG_ON(bytes % 2);
BUG_ON(bytes <= 0);
ret = wm831x->read_dev(wm831x, reg, bytes, dest);
if (ret < 0)
return ret;
for (i = 0; i < bytes / 2; i++) {
buf[i] = be16_to_cpu(buf[i]);
dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n",
buf[i], reg + i, reg + i);
}
return 0;
}
/**
* wm831x_reg_read: Read a single WM831x register.
*
* @wm831x: Device to read from.
* @reg: Register to read.
*/
int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
{
unsigned short val;
int ret;
mutex_lock(&wm831x->io_lock);
ret = wm831x_read(wm831x, reg, 2, &val);
mutex_unlock(&wm831x->io_lock);
if (ret < 0)
return ret;
else
return val;
}
EXPORT_SYMBOL_GPL(wm831x_reg_read);
/**
* wm831x_bulk_read: Read multiple WM831x registers
*
* @wm831x: Device to read from
* @reg: First register
* @count: Number of registers
* @buf: Buffer to fill.
*/
int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
int count, u16 *buf)
{
int ret;
mutex_lock(&wm831x->io_lock);
ret = wm831x_read(wm831x, reg, count * 2, buf);
mutex_unlock(&wm831x->io_lock);
return ret;
}
EXPORT_SYMBOL_GPL(wm831x_bulk_read);
static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
int bytes, void *src)
{
u16 *buf = src;
int i;
BUG_ON(bytes % 2);
BUG_ON(bytes <= 0);
for (i = 0; i < bytes / 2; i++) {
if (wm831x_reg_locked(wm831x, reg))
return -EPERM;
dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
buf[i], reg + i, reg + i);
buf[i] = cpu_to_be16(buf[i]);
}
return wm831x->write_dev(wm831x, reg, bytes, src);
}
/**
* wm831x_reg_write: Write a single WM831x register.
*
* @wm831x: Device to write to.
* @reg: Register to write to.
* @val: Value to write.
*/
int wm831x_reg_write(struct wm831x *wm831x, unsigned short reg,
unsigned short val)
{
int ret;
mutex_lock(&wm831x->io_lock);
ret = wm831x_write(wm831x, reg, 2, &val);
mutex_unlock(&wm831x->io_lock);
return ret;
}
EXPORT_SYMBOL_GPL(wm831x_reg_write);
/**
* wm831x_set_bits: Set the value of a bitfield in a WM831x register
*
* @wm831x: Device to write to.
* @reg: Register to write to.
* @mask: Mask of bits to set.
* @val: Value to set (unshifted)
*/
int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
unsigned short mask, unsigned short val)
{
int ret;
u16 r;
mutex_lock(&wm831x->io_lock);
ret = wm831x_read(wm831x, reg, 2, &r);
if (ret < 0)
goto out;
r &= ~mask;
r |= val;
ret = wm831x_write(wm831x, reg, 2, &r);
out:
mutex_unlock(&wm831x->io_lock);
return ret;
}
EXPORT_SYMBOL_GPL(wm831x_set_bits);
/**
* wm831x_auxadc_read: Read a value from the WM831x AUXADC
*
* @wm831x: Device to read from.
* @input: AUXADC input to read.
*/
int wm831x_auxadc_read(struct wm831x *wm831x, enum wm831x_auxadc input)
{
int ret, src;
mutex_lock(&wm831x->auxadc_lock);
ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
WM831X_AUX_ENA, WM831X_AUX_ENA);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to enable AUXADC: %d\n", ret);
goto out;
}
/* We force a single source at present */
src = input;
ret = wm831x_reg_write(wm831x, WM831X_AUXADC_SOURCE,
1 << src);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to set AUXADC source: %d\n", ret);
goto out;
}
ret = wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL,
WM831X_AUX_CVT_ENA, WM831X_AUX_CVT_ENA);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to start AUXADC: %d\n", ret);
goto disable;
}
/* Ignore the result to allow us to soldier on without IRQ hookup */
wait_for_completion_timeout(&wm831x->auxadc_done, msecs_to_jiffies(5));
ret = wm831x_reg_read(wm831x, WM831X_AUXADC_CONTROL);
if (ret < 0) {
dev_err(wm831x->dev, "AUXADC status read failed: %d\n", ret);
goto disable;
}
if (ret & WM831X_AUX_CVT_ENA) {
dev_err(wm831x->dev, "Timed out reading AUXADC\n");
ret = -EBUSY;
goto disable;
}
ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read AUXADC data: %d\n", ret);
} else {
src = ((ret & WM831X_AUX_DATA_SRC_MASK)
>> WM831X_AUX_DATA_SRC_SHIFT) - 1;
if (src == 14)
src = WM831X_AUX_CAL;
if (src != input) {
dev_err(wm831x->dev, "Data from source %d not %d\n",
src, input);
ret = -EINVAL;
} else {
ret &= WM831X_AUX_DATA_MASK;
}
}
disable:
wm831x_set_bits(wm831x, WM831X_AUXADC_CONTROL, WM831X_AUX_ENA, 0);
out:
mutex_unlock(&wm831x->auxadc_lock);
return ret;
}
EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data)
{
struct wm831x *wm831x = irq_data;
complete(&wm831x->auxadc_done);
return IRQ_HANDLED;
}
/**
* wm831x_auxadc_read_uv: Read a voltage from the WM831x AUXADC
*
* @wm831x: Device to read from.
* @input: AUXADC input to read.
*/
int wm831x_auxadc_read_uv(struct wm831x *wm831x, enum wm831x_auxadc input)
{
int ret;
ret = wm831x_auxadc_read(wm831x, input);
if (ret < 0)
return ret;
ret *= 1465;
return ret;
}
EXPORT_SYMBOL_GPL(wm831x_auxadc_read_uv);
static struct resource wm831x_dcdc1_resources[] = {
{
.start = WM831X_DC1_CONTROL_1,
.end = WM831X_DC1_DVS_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_DC1,
.end = WM831X_IRQ_UV_DC1,
.flags = IORESOURCE_IRQ,
},
{
.name = "HC",
.start = WM831X_IRQ_HC_DC1,
.end = WM831X_IRQ_HC_DC1,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_dcdc2_resources[] = {
{
.start = WM831X_DC2_CONTROL_1,
.end = WM831X_DC2_DVS_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_DC2,
.end = WM831X_IRQ_UV_DC2,
.flags = IORESOURCE_IRQ,
},
{
.name = "HC",
.start = WM831X_IRQ_HC_DC2,
.end = WM831X_IRQ_HC_DC2,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_dcdc3_resources[] = {
{
.start = WM831X_DC3_CONTROL_1,
.end = WM831X_DC3_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_DC3,
.end = WM831X_IRQ_UV_DC3,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_dcdc4_resources[] = {
{
.start = WM831X_DC4_CONTROL,
.end = WM831X_DC4_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_DC4,
.end = WM831X_IRQ_UV_DC4,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm8320_dcdc4_buck_resources[] = {
{
.start = WM831X_DC4_CONTROL,
.end = WM832X_DC4_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_DC4,
.end = WM831X_IRQ_UV_DC4,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_gpio_resources[] = {
{
.start = WM831X_IRQ_GPIO_1,
.end = WM831X_IRQ_GPIO_16,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_isink1_resources[] = {
{
.start = WM831X_CURRENT_SINK_1,
.end = WM831X_CURRENT_SINK_1,
.flags = IORESOURCE_IO,
},
{
.start = WM831X_IRQ_CS1,
.end = WM831X_IRQ_CS1,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_isink2_resources[] = {
{
.start = WM831X_CURRENT_SINK_2,
.end = WM831X_CURRENT_SINK_2,
.flags = IORESOURCE_IO,
},
{
.start = WM831X_IRQ_CS2,
.end = WM831X_IRQ_CS2,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo1_resources[] = {
{
.start = WM831X_LDO1_CONTROL,
.end = WM831X_LDO1_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO1,
.end = WM831X_IRQ_UV_LDO1,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo2_resources[] = {
{
.start = WM831X_LDO2_CONTROL,
.end = WM831X_LDO2_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO2,
.end = WM831X_IRQ_UV_LDO2,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo3_resources[] = {
{
.start = WM831X_LDO3_CONTROL,
.end = WM831X_LDO3_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO3,
.end = WM831X_IRQ_UV_LDO3,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo4_resources[] = {
{
.start = WM831X_LDO4_CONTROL,
.end = WM831X_LDO4_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO4,
.end = WM831X_IRQ_UV_LDO4,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo5_resources[] = {
{
.start = WM831X_LDO5_CONTROL,
.end = WM831X_LDO5_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO5,
.end = WM831X_IRQ_UV_LDO5,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo6_resources[] = {
{
.start = WM831X_LDO6_CONTROL,
.end = WM831X_LDO6_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO6,
.end = WM831X_IRQ_UV_LDO6,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo7_resources[] = {
{
.start = WM831X_LDO7_CONTROL,
.end = WM831X_LDO7_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO7,
.end = WM831X_IRQ_UV_LDO7,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo8_resources[] = {
{
.start = WM831X_LDO8_CONTROL,
.end = WM831X_LDO8_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO8,
.end = WM831X_IRQ_UV_LDO8,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo9_resources[] = {
{
.start = WM831X_LDO9_CONTROL,
.end = WM831X_LDO9_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO9,
.end = WM831X_IRQ_UV_LDO9,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo10_resources[] = {
{
.start = WM831X_LDO10_CONTROL,
.end = WM831X_LDO10_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
{
.name = "UV",
.start = WM831X_IRQ_UV_LDO10,
.end = WM831X_IRQ_UV_LDO10,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_ldo11_resources[] = {
{
.start = WM831X_LDO11_ON_CONTROL,
.end = WM831X_LDO11_SLEEP_CONTROL,
.flags = IORESOURCE_IO,
},
};
static struct resource wm831x_on_resources[] = {
{
.start = WM831X_IRQ_ON,
.end = WM831X_IRQ_ON,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_power_resources[] = {
{
.name = "SYSLO",
.start = WM831X_IRQ_PPM_SYSLO,
.end = WM831X_IRQ_PPM_SYSLO,
.flags = IORESOURCE_IRQ,
},
{
.name = "PWR SRC",
.start = WM831X_IRQ_PPM_PWR_SRC,
.end = WM831X_IRQ_PPM_PWR_SRC,
.flags = IORESOURCE_IRQ,
},
{
.name = "USB CURR",
.start = WM831X_IRQ_PPM_USB_CURR,
.end = WM831X_IRQ_PPM_USB_CURR,
.flags = IORESOURCE_IRQ,
},
{
.name = "BATT HOT",
.start = WM831X_IRQ_CHG_BATT_HOT,
.end = WM831X_IRQ_CHG_BATT_HOT,
.flags = IORESOURCE_IRQ,
},
{
.name = "BATT COLD",
.start = WM831X_IRQ_CHG_BATT_COLD,
.end = WM831X_IRQ_CHG_BATT_COLD,
.flags = IORESOURCE_IRQ,
},
{
.name = "BATT FAIL",
.start = WM831X_IRQ_CHG_BATT_FAIL,
.end = WM831X_IRQ_CHG_BATT_FAIL,
.flags = IORESOURCE_IRQ,
},
{
.name = "OV",
.start = WM831X_IRQ_CHG_OV,
.end = WM831X_IRQ_CHG_OV,
.flags = IORESOURCE_IRQ,
},
{
.name = "END",
.start = WM831X_IRQ_CHG_END,
.end = WM831X_IRQ_CHG_END,
.flags = IORESOURCE_IRQ,
},
{
.name = "TO",
.start = WM831X_IRQ_CHG_TO,
.end = WM831X_IRQ_CHG_TO,
.flags = IORESOURCE_IRQ,
},
{
.name = "MODE",
.start = WM831X_IRQ_CHG_MODE,
.end = WM831X_IRQ_CHG_MODE,
.flags = IORESOURCE_IRQ,
},
{
.name = "START",
.start = WM831X_IRQ_CHG_START,
.end = WM831X_IRQ_CHG_START,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_rtc_resources[] = {
{
.name = "PER",
.start = WM831X_IRQ_RTC_PER,
.end = WM831X_IRQ_RTC_PER,
.flags = IORESOURCE_IRQ,
},
{
.name = "ALM",
.start = WM831X_IRQ_RTC_ALM,
.end = WM831X_IRQ_RTC_ALM,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_status1_resources[] = {
{
.start = WM831X_STATUS_LED_1,
.end = WM831X_STATUS_LED_1,
.flags = IORESOURCE_IO,
},
};
static struct resource wm831x_status2_resources[] = {
{
.start = WM831X_STATUS_LED_2,
.end = WM831X_STATUS_LED_2,
.flags = IORESOURCE_IO,
},
};
static struct resource wm831x_touch_resources[] = {
{
.name = "TCHPD",
.start = WM831X_IRQ_TCHPD,
.end = WM831X_IRQ_TCHPD,
.flags = IORESOURCE_IRQ,
},
{
.name = "TCHDATA",
.start = WM831X_IRQ_TCHDATA,
.end = WM831X_IRQ_TCHDATA,
.flags = IORESOURCE_IRQ,
},
};
static struct resource wm831x_wdt_resources[] = {
{
.start = WM831X_IRQ_WDOG_TO,
.end = WM831X_IRQ_WDOG_TO,
.flags = IORESOURCE_IRQ,
},
};
static struct mfd_cell wm8310_devs[] = {
{
.name = "wm831x-backup",
},
{
.name = "wm831x-buckv",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
.resources = wm831x_dcdc1_resources,
},
{
.name = "wm831x-buckv",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
.resources = wm831x_dcdc2_resources,
},
{
.name = "wm831x-buckp",
.id = 3,
.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
.resources = wm831x_dcdc3_resources,
},
{
.name = "wm831x-boostp",
.id = 4,
.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
.resources = wm831x_dcdc4_resources,
},
{
.name = "wm831x-epe",
.id = 1,
},
{
.name = "wm831x-epe",
.id = 2,
},
{
.name = "wm831x-gpio",
.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
.resources = wm831x_gpio_resources,
},
{
.name = "wm831x-hwmon",
},
{
.name = "wm831x-isink",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
.resources = wm831x_isink1_resources,
},
{
.name = "wm831x-isink",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
.resources = wm831x_isink2_resources,
},
{
.name = "wm831x-ldo",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
.resources = wm831x_ldo1_resources,
},
{
.name = "wm831x-ldo",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
.resources = wm831x_ldo2_resources,
},
{
.name = "wm831x-ldo",
.id = 3,
.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
.resources = wm831x_ldo3_resources,
},
{
.name = "wm831x-ldo",
.id = 4,
.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
.resources = wm831x_ldo4_resources,
},
{
.name = "wm831x-ldo",
.id = 5,
.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
.resources = wm831x_ldo5_resources,
},
{
.name = "wm831x-ldo",
.id = 6,
.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
.resources = wm831x_ldo6_resources,
},
{
.name = "wm831x-aldo",
.id = 7,
.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
.resources = wm831x_ldo7_resources,
},
{
.name = "wm831x-aldo",
.id = 8,
.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
.resources = wm831x_ldo8_resources,
},
{
.name = "wm831x-aldo",
.id = 9,
.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
.resources = wm831x_ldo9_resources,
},
{
.name = "wm831x-aldo",
.id = 10,
.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
.resources = wm831x_ldo10_resources,
},
{
.name = "wm831x-alive-ldo",
.id = 11,
.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
.resources = wm831x_ldo11_resources,
},
{
.name = "wm831x-on",
.num_resources = ARRAY_SIZE(wm831x_on_resources),
.resources = wm831x_on_resources,
},
{
.name = "wm831x-power",
.num_resources = ARRAY_SIZE(wm831x_power_resources),
.resources = wm831x_power_resources,
},
{
.name = "wm831x-rtc",
.num_resources = ARRAY_SIZE(wm831x_rtc_resources),
.resources = wm831x_rtc_resources,
},
{
.name = "wm831x-status",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_status1_resources),
.resources = wm831x_status1_resources,
},
{
.name = "wm831x-status",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_status2_resources),
.resources = wm831x_status2_resources,
},
{
.name = "wm831x-watchdog",
.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
.resources = wm831x_wdt_resources,
},
};
static struct mfd_cell wm8311_devs[] = {
{
.name = "wm831x-backup",
},
{
.name = "wm831x-buckv",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
.resources = wm831x_dcdc1_resources,
},
{
.name = "wm831x-buckv",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
.resources = wm831x_dcdc2_resources,
},
{
.name = "wm831x-buckp",
.id = 3,
.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
.resources = wm831x_dcdc3_resources,
},
{
.name = "wm831x-boostp",
.id = 4,
.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
.resources = wm831x_dcdc4_resources,
},
{
.name = "wm831x-epe",
.id = 1,
},
{
.name = "wm831x-epe",
.id = 2,
},
{
.name = "wm831x-gpio",
.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
.resources = wm831x_gpio_resources,
},
{
.name = "wm831x-hwmon",
},
{
.name = "wm831x-isink",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
.resources = wm831x_isink1_resources,
},
{
.name = "wm831x-isink",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
.resources = wm831x_isink2_resources,
},
{
.name = "wm831x-ldo",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
.resources = wm831x_ldo1_resources,
},
{
.name = "wm831x-ldo",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
.resources = wm831x_ldo2_resources,
},
{
.name = "wm831x-ldo",
.id = 3,
.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
.resources = wm831x_ldo3_resources,
},
{
.name = "wm831x-ldo",
.id = 4,
.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
.resources = wm831x_ldo4_resources,
},
{
.name = "wm831x-ldo",
.id = 5,
.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
.resources = wm831x_ldo5_resources,
},
{
.name = "wm831x-aldo",
.id = 7,
.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
.resources = wm831x_ldo7_resources,
},
{
.name = "wm831x-alive-ldo",
.id = 11,
.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
.resources = wm831x_ldo11_resources,
},
{
.name = "wm831x-on",
.num_resources = ARRAY_SIZE(wm831x_on_resources),
.resources = wm831x_on_resources,
},
{
.name = "wm831x-power",
.num_resources = ARRAY_SIZE(wm831x_power_resources),
.resources = wm831x_power_resources,
},
{
.name = "wm831x-rtc",
.num_resources = ARRAY_SIZE(wm831x_rtc_resources),
.resources = wm831x_rtc_resources,
},
{
.name = "wm831x-status",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_status1_resources),
.resources = wm831x_status1_resources,
},
{
.name = "wm831x-status",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_status2_resources),
.resources = wm831x_status2_resources,
},
{
.name = "wm831x-touch",
.num_resources = ARRAY_SIZE(wm831x_touch_resources),
.resources = wm831x_touch_resources,
},
{
.name = "wm831x-watchdog",
.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
.resources = wm831x_wdt_resources,
},
};
static struct mfd_cell wm8312_devs[] = {
{
.name = "wm831x-backup",
},
{
.name = "wm831x-buckv",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
.resources = wm831x_dcdc1_resources,
},
{
.name = "wm831x-buckv",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
.resources = wm831x_dcdc2_resources,
},
{
.name = "wm831x-buckp",
.id = 3,
.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
.resources = wm831x_dcdc3_resources,
},
{
.name = "wm831x-boostp",
.id = 4,
.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
.resources = wm831x_dcdc4_resources,
},
{
.name = "wm831x-epe",
.id = 1,
},
{
.name = "wm831x-epe",
.id = 2,
},
{
.name = "wm831x-gpio",
.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
.resources = wm831x_gpio_resources,
},
{
.name = "wm831x-hwmon",
},
{
.name = "wm831x-isink",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
.resources = wm831x_isink1_resources,
},
{
.name = "wm831x-isink",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
.resources = wm831x_isink2_resources,
},
{
.name = "wm831x-ldo",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
.resources = wm831x_ldo1_resources,
},
{
.name = "wm831x-ldo",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
.resources = wm831x_ldo2_resources,
},
{
.name = "wm831x-ldo",
.id = 3,
.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
.resources = wm831x_ldo3_resources,
},
{
.name = "wm831x-ldo",
.id = 4,
.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
.resources = wm831x_ldo4_resources,
},
{
.name = "wm831x-ldo",
.id = 5,
.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
.resources = wm831x_ldo5_resources,
},
{
.name = "wm831x-ldo",
.id = 6,
.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
.resources = wm831x_ldo6_resources,
},
{
.name = "wm831x-aldo",
.id = 7,
.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
.resources = wm831x_ldo7_resources,
},
{
.name = "wm831x-aldo",
.id = 8,
.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
.resources = wm831x_ldo8_resources,
},
{
.name = "wm831x-aldo",
.id = 9,
.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
.resources = wm831x_ldo9_resources,
},
{
.name = "wm831x-aldo",
.id = 10,
.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
.resources = wm831x_ldo10_resources,
},
{
.name = "wm831x-alive-ldo",
.id = 11,
.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
.resources = wm831x_ldo11_resources,
},
{
.name = "wm831x-on",
.num_resources = ARRAY_SIZE(wm831x_on_resources),
.resources = wm831x_on_resources,
},
{
.name = "wm831x-power",
.num_resources = ARRAY_SIZE(wm831x_power_resources),
.resources = wm831x_power_resources,
},
{
.name = "wm831x-rtc",
.num_resources = ARRAY_SIZE(wm831x_rtc_resources),
.resources = wm831x_rtc_resources,
},
{
.name = "wm831x-status",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_status1_resources),
.resources = wm831x_status1_resources,
},
{
.name = "wm831x-status",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_status2_resources),
.resources = wm831x_status2_resources,
},
{
.name = "wm831x-touch",
.num_resources = ARRAY_SIZE(wm831x_touch_resources),
.resources = wm831x_touch_resources,
},
{
.name = "wm831x-watchdog",
.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
.resources = wm831x_wdt_resources,
},
};
static struct mfd_cell wm8320_devs[] = {
{
.name = "wm831x-backup",
},
{
.name = "wm831x-buckv",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
.resources = wm831x_dcdc1_resources,
},
{
.name = "wm831x-buckv",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
.resources = wm831x_dcdc2_resources,
},
{
.name = "wm831x-buckp",
.id = 3,
.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
.resources = wm831x_dcdc3_resources,
},
{
.name = "wm831x-buckp",
.id = 4,
.num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
.resources = wm8320_dcdc4_buck_resources,
},
{
.name = "wm831x-gpio",
.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
.resources = wm831x_gpio_resources,
},
{
.name = "wm831x-hwmon",
},
{
.name = "wm831x-ldo",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
.resources = wm831x_ldo1_resources,
},
{
.name = "wm831x-ldo",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
.resources = wm831x_ldo2_resources,
},
{
.name = "wm831x-ldo",
.id = 3,
.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
.resources = wm831x_ldo3_resources,
},
{
.name = "wm831x-ldo",
.id = 4,
.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
.resources = wm831x_ldo4_resources,
},
{
.name = "wm831x-ldo",
.id = 5,
.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
.resources = wm831x_ldo5_resources,
},
{
.name = "wm831x-ldo",
.id = 6,
.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
.resources = wm831x_ldo6_resources,
},
{
.name = "wm831x-aldo",
.id = 7,
.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
.resources = wm831x_ldo7_resources,
},
{
.name = "wm831x-aldo",
.id = 8,
.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
.resources = wm831x_ldo8_resources,
},
{
.name = "wm831x-aldo",
.id = 9,
.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
.resources = wm831x_ldo9_resources,
},
{
.name = "wm831x-aldo",
.id = 10,
.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
.resources = wm831x_ldo10_resources,
},
{
.name = "wm831x-alive-ldo",
.id = 11,
.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
.resources = wm831x_ldo11_resources,
},
{
.name = "wm831x-on",
.num_resources = ARRAY_SIZE(wm831x_on_resources),
.resources = wm831x_on_resources,
},
{
.name = "wm831x-rtc",
.num_resources = ARRAY_SIZE(wm831x_rtc_resources),
.resources = wm831x_rtc_resources,
},
{
.name = "wm831x-status",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_status1_resources),
.resources = wm831x_status1_resources,
},
{
.name = "wm831x-status",
.id = 2,
.num_resources = ARRAY_SIZE(wm831x_status2_resources),
.resources = wm831x_status2_resources,
},
{
.name = "wm831x-watchdog",
.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
.resources = wm831x_wdt_resources,
},
};
static struct mfd_cell backlight_devs[] = {
{
.name = "wm831x-backlight",
},
};
/*
* Instantiate the generic non-control parts of the device.
*/
static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
{
struct wm831x_pdata *pdata = wm831x->dev->platform_data;
int rev;
enum wm831x_parent parent;
int ret;
mutex_init(&wm831x->io_lock);
mutex_init(&wm831x->key_lock);
mutex_init(&wm831x->auxadc_lock);
init_completion(&wm831x->auxadc_done);
dev_set_drvdata(wm831x->dev, wm831x);
ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
goto err;
}
if (ret != 0x6204) {
dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
ret = -EINVAL;
goto err;
}
ret = wm831x_reg_read(wm831x, WM831X_REVISION);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
goto err;
}
rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
goto err;
}
/* Some engineering samples do not have the ID set, rely on
* the device being registered correctly.
*/
if (ret == 0) {
dev_info(wm831x->dev, "Device is an engineering sample\n");
ret = id;
}
switch (ret) {
case WM8310:
parent = WM8310;
wm831x->num_gpio = 16;
if (rev > 0) {
wm831x->has_gpio_ena = 1;
wm831x->has_cs_sts = 1;
}
dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
break;
case WM8311:
parent = WM8311;
wm831x->num_gpio = 16;
if (rev > 0) {
wm831x->has_gpio_ena = 1;
wm831x->has_cs_sts = 1;
}
dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
break;
case WM8312:
parent = WM8312;
wm831x->num_gpio = 16;
if (rev > 0) {
wm831x->has_gpio_ena = 1;
wm831x->has_cs_sts = 1;
}
dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
break;
case WM8320:
parent = WM8320;
wm831x->num_gpio = 12;
dev_info(wm831x->dev, "WM8320 revision %c\n", 'A' + rev);
break;
default:
dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
ret = -EINVAL;
goto err;
}
/* This will need revisiting in future but is OK for all
* current parts.
*/
if (parent != id)
dev_warn(wm831x->dev, "Device was registered as a WM%lx\n",
id);
/* Bootstrap the user key */
ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
goto err;
}
if (ret != 0) {
dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
ret);
wm831x_reg_write(wm831x, WM831X_SECURITY_KEY, 0);
}
wm831x->locked = 1;
if (pdata && pdata->pre_init) {
ret = pdata->pre_init(wm831x);
if (ret != 0) {
dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
goto err;
}
}
ret = wm831x_irq_init(wm831x, irq);
if (ret != 0)
goto err;
if (wm831x->irq_base) {
ret = request_threaded_irq(wm831x->irq_base +
WM831X_IRQ_AUXADC_DATA,
NULL, wm831x_auxadc_irq, 0,
"auxadc", wm831x);
if (ret < 0)
dev_err(wm831x->dev, "AUXADC IRQ request failed: %d\n",
ret);
}
/* The core device is up, instantiate the subdevices. */
switch (parent) {
case WM8310:
ret = mfd_add_devices(wm831x->dev, -1,
wm8310_devs, ARRAY_SIZE(wm8310_devs),
NULL, wm831x->irq_base);
break;
case WM8311:
ret = mfd_add_devices(wm831x->dev, -1,
wm8311_devs, ARRAY_SIZE(wm8311_devs),
NULL, wm831x->irq_base);
break;
case WM8312:
ret = mfd_add_devices(wm831x->dev, -1,
wm8312_devs, ARRAY_SIZE(wm8312_devs),
NULL, wm831x->irq_base);
break;
case WM8320:
ret = mfd_add_devices(wm831x->dev, -1,
wm8320_devs, ARRAY_SIZE(wm8320_devs),
NULL, 0);
break;
default:
/* If this happens the bus probe function is buggy */
BUG();
}
if (ret != 0) {
dev_err(wm831x->dev, "Failed to add children\n");
goto err_irq;
}
if (pdata && pdata->backlight) {
/* Treat errors as non-critical */
ret = mfd_add_devices(wm831x->dev, -1, backlight_devs,
ARRAY_SIZE(backlight_devs), NULL,
wm831x->irq_base);
if (ret < 0)
dev_err(wm831x->dev, "Failed to add backlight: %d\n",
ret);
}
wm831x_otp_init(wm831x);
if (pdata && pdata->post_init) {
ret = pdata->post_init(wm831x);
if (ret != 0) {
dev_err(wm831x->dev, "post_init() failed: %d\n", ret);
goto err_irq;
}
}
return 0;
err_irq:
wm831x_irq_exit(wm831x);
err:
mfd_remove_devices(wm831x->dev);
kfree(wm831x);
return ret;
}
static void wm831x_device_exit(struct wm831x *wm831x)
{
wm831x_otp_exit(wm831x);
mfd_remove_devices(wm831x->dev);
if (wm831x->irq_base)
free_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, wm831x);
wm831x_irq_exit(wm831x);
kfree(wm831x);
}
static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg,
int bytes, void *dest)
{
struct i2c_client *i2c = wm831x->control_data;
int ret;
u16 r = cpu_to_be16(reg);
ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
if (ret < 0)
return ret;
if (ret != 2)
return -EIO;
ret = i2c_master_recv(i2c, dest, bytes);
if (ret < 0)
return ret;
if (ret != bytes)
return -EIO;
return 0;
}
/* Currently we allocate the write buffer on the stack; this is OK for
* small writes - if we need to do large writes this will need to be
* revised.
*/
static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg,
int bytes, void *src)
{
struct i2c_client *i2c = wm831x->control_data;
unsigned char msg[bytes + 2];
int ret;
reg = cpu_to_be16(reg);
memcpy(&msg[0], &reg, 2);
memcpy(&msg[2], src, bytes);
ret = i2c_master_send(i2c, msg, bytes + 2);
if (ret < 0)
return ret;
if (ret < bytes + 2)
return -EIO;
return 0;
}
static int wm831x_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm831x *wm831x;
wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
if (wm831x == NULL) {
kfree(i2c);
return -ENOMEM;
}
i2c_set_clientdata(i2c, wm831x);
wm831x->dev = &i2c->dev;
wm831x->control_data = i2c;
wm831x->read_dev = wm831x_i2c_read_device;
wm831x->write_dev = wm831x_i2c_write_device;
return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
}
static int wm831x_i2c_remove(struct i2c_client *i2c)
{
struct wm831x *wm831x = i2c_get_clientdata(i2c);
wm831x_device_exit(wm831x);
return 0;
}
static const struct i2c_device_id wm831x_i2c_id[] = {
{ "wm8310", WM8310 },
{ "wm8311", WM8311 },
{ "wm8312", WM8312 },
{ "wm8320", WM8320 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
static struct i2c_driver wm831x_i2c_driver = {
.driver = {
.name = "wm831x",
.owner = THIS_MODULE,
},
.probe = wm831x_i2c_probe,
.remove = wm831x_i2c_remove,
.id_table = wm831x_i2c_id,
};
static int __init wm831x_i2c_init(void)
{
int ret;
ret = i2c_add_driver(&wm831x_i2c_driver);
if (ret != 0)
pr_err("Failed to register wm831x I2C driver: %d\n", ret);
return ret;
}
subsys_initcall(wm831x_i2c_init);
static void __exit wm831x_i2c_exit(void)
{
i2c_del_driver(&wm831x_i2c_driver);
}
module_exit(wm831x_i2c_exit);
MODULE_DESCRIPTION("I2C support for the WM831X AudioPlus PMIC");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mark Brown");
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