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mfd: Add regmap cache support for wm8350

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Use the most simple possible transformation on the existing code so keep
the table sitting around, further patches in this series will delete the
existing cache code - the main purpose of this patch is to ensure that
we always have a cache for bisection.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown 2012-06-03 13:37:22 +01:00 committed by Samuel Ortiz
parent b0ab907d32
commit 52b461b86a
4 changed files with 80 additions and 17 deletions
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29
drivers/mfd/wm8350-core.c
View File

@ -32,9 +32,6 @@
#include <linux/mfd/wm8350/supply.h>
#include <linux/mfd/wm8350/wdt.h>
#define WM8350_UNLOCK_KEY 0x0013
#define WM8350_LOCK_KEY 0x0000
#define WM8350_CLOCK_CONTROL_1 0x28
#define WM8350_AIF_TEST 0x74
@ -295,15 +292,20 @@ EXPORT_SYMBOL_GPL(wm8350_block_write);
*/
int wm8350_reg_lock(struct wm8350 *wm8350)
{
u16 key = WM8350_LOCK_KEY;
int ret;
mutex_lock(&reg_lock_mutex);
ldbg(__func__);
mutex_lock(&io_mutex);
ret = wm8350_write(wm8350, WM8350_SECURITY, 1, &key);
ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_LOCK_KEY);
if (ret)
dev_err(wm8350->dev, "lock failed\n");
mutex_unlock(&io_mutex);
wm8350->unlocked = false;
mutex_unlock(&reg_lock_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(wm8350_reg_lock);
@ -319,15 +321,20 @@ EXPORT_SYMBOL_GPL(wm8350_reg_lock);
*/
int wm8350_reg_unlock(struct wm8350 *wm8350)
{
u16 key = WM8350_UNLOCK_KEY;
int ret;
mutex_lock(&reg_lock_mutex);
ldbg(__func__);
mutex_lock(&io_mutex);
ret = wm8350_write(wm8350, WM8350_SECURITY, 1, &key);
ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_UNLOCK_KEY);
if (ret)
dev_err(wm8350->dev, "unlock failed\n");
mutex_unlock(&io_mutex);
wm8350->unlocked = true;
mutex_unlock(&reg_lock_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(wm8350_reg_unlock);

5
drivers/mfd/wm8350-i2c.c
View File

@ -23,11 +23,6 @@
#include <linux/regmap.h>
#include <linux/slab.h>
static const struct regmap_config wm8350_regmap = {
.reg_bits = 8,
.val_bits = 16,
};
static int wm8350_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{

56
drivers/mfd/wm8350-regmap.c
View File

@ -3433,3 +3433,59 @@ const struct wm8350_reg_access wm8350_reg_io_map[] = {
{ 0x0000, 0x0000, 0x0000 }, /* R254 */
{ 0x0000, 0x0000, 0x0000 }, /* R255 */
};
static bool wm8350_readable(struct device *dev, unsigned int reg)
{
return wm8350_reg_io_map[reg].readable;
}
static bool wm8350_writeable(struct device *dev, unsigned int reg)
{
struct wm8350 *wm8350 = dev_get_drvdata(dev);
if (!wm8350->unlocked) {
if ((reg >= WM8350_GPIO_FUNCTION_SELECT_1 &&
reg <= WM8350_GPIO_FUNCTION_SELECT_4) ||
(reg >= WM8350_BATTERY_CHARGER_CONTROL_1 &&
reg <= WM8350_BATTERY_CHARGER_CONTROL_3))
return false;
}
return wm8350_reg_io_map[reg].writable;
}
static bool wm8350_volatile(struct device *dev, unsigned int reg)
{
return wm8350_reg_io_map[reg].vol;
}
static bool wm8350_precious(struct device *dev, unsigned int reg)
{
switch (reg) {
case WM8350_SYSTEM_INTERRUPTS:
case WM8350_INT_STATUS_1:
case WM8350_INT_STATUS_2:
case WM8350_POWER_UP_INT_STATUS:
case WM8350_UNDER_VOLTAGE_INT_STATUS:
case WM8350_OVER_CURRENT_INT_STATUS:
case WM8350_GPIO_INT_STATUS:
case WM8350_COMPARATOR_INT_STATUS:
return true;
default:
return false;
}
}
const struct regmap_config wm8350_regmap = {
.reg_bits = 8,
.val_bits = 16,
.cache_type = REGCACHE_RBTREE,
.max_register = WM8350_MAX_REGISTER,
.readable_reg = wm8350_readable,
.writeable_reg = wm8350_writeable,
.volatile_reg = wm8350_volatile,
.precious_reg = wm8350_precious,
};

7
include/linux/mfd/wm8350/core.h
View File

@ -17,6 +17,7 @@
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/completion.h>
#include <linux/regmap.h>
#include <linux/mfd/wm8350/audio.h>
#include <linux/mfd/wm8350/gpio.h>
@ -66,6 +67,9 @@
#define WM8350_MAX_REGISTER 0xFF
#define WM8350_UNLOCK_KEY 0x0013
#define WM8350_LOCK_KEY 0x0000
/*
* Field Definitions.
*/
@ -582,6 +586,7 @@
#define WM8350_NUM_IRQ_REGS 7
extern const struct regmap_config wm8350_regmap;
struct wm8350_reg_access {
u16 readable; /* Mask of readable bits */
u16 writable; /* Mask of writable bits */
@ -602,7 +607,6 @@ extern const u16 wm8352_mode2_defaults[];
extern const u16 wm8352_mode3_defaults[];
struct wm8350;
struct regmap;
struct wm8350_hwmon {
struct platform_device *pdev;
@ -615,6 +619,7 @@ struct wm8350 {
/* device IO */
struct regmap *regmap;
u16 *reg_cache;
bool unlocked;
struct mutex auxadc_mutex;
struct completion auxadc_done;