[V3 2/2] mfd: Convert 88pm860x to use regmap api
Jett.Zhou
jtzhou at marvell.com
Mon Nov 14 00:48:48 EST 2011
Convert the 88pm860x normal bank register read/write to
use the register map API.
Signed-off-by: Jett.Zhou <jtzhou at marvell.com>
---
drivers/mfd/88pm860x-i2c.c | 105 +++++++++++++++++------------------------
drivers/mfd/Kconfig | 1 +
include/linux/mfd/88pm860x.h | 3 +-
3 files changed, 47 insertions(+), 62 deletions(-)
diff --git a/drivers/mfd/88pm860x-i2c.c b/drivers/mfd/88pm860x-i2c.c
index f629d6f..9121a47 100644
--- a/drivers/mfd/88pm860x-i2c.c
+++ b/drivers/mfd/88pm860x-i2c.c
@@ -12,51 +12,20 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/regmap.h>
#include <linux/mfd/88pm860x.h>
#include <linux/slab.h>
-static inline int pm860x_read_device(struct i2c_client *i2c,
- int reg, int bytes, void *dest)
-{
- unsigned char data;
- int ret;
-
- data = (unsigned char)reg;
- ret = i2c_master_send(i2c, &data, 1);
- if (ret < 0)
- return ret;
-
- ret = i2c_master_recv(i2c, dest, bytes);
- if (ret < 0)
- return ret;
- return 0;
-}
-
-static inline int pm860x_write_device(struct i2c_client *i2c,
- int reg, int bytes, void *src)
-{
- unsigned char buf[bytes + 1];
- int ret;
-
- buf[0] = (unsigned char)reg;
- memcpy(&buf[1], src, bytes);
-
- ret = i2c_master_send(i2c, buf, bytes + 1);
- if (ret < 0)
- return ret;
- return 0;
-}
-
int pm860x_reg_read(struct i2c_client *i2c, int reg)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
- unsigned char data;
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
+ unsigned int data;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_read_device(i2c, reg, 1, &data);
- mutex_unlock(&chip->io_lock);
-
+ ret = regmap_read(map, reg, &data);
if (ret < 0)
return ret;
else
@@ -68,12 +37,11 @@ int pm860x_reg_write(struct i2c_client *i2c, int reg,
unsigned char data)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_write_device(i2c, reg, 1, &data);
- mutex_unlock(&chip->io_lock);
-
+ ret = regmap_write(map, reg, data);
return ret;
}
EXPORT_SYMBOL(pm860x_reg_write);
@@ -82,12 +50,11 @@ int pm860x_bulk_read(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_read_device(i2c, reg, count, buf);
- mutex_unlock(&chip->io_lock);
-
+ ret = regmap_raw_read(map, reg, buf, count);
return ret;
}
EXPORT_SYMBOL(pm860x_bulk_read);
@@ -96,12 +63,11 @@ int pm860x_bulk_write(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_write_device(i2c, reg, count, buf);
- mutex_unlock(&chip->io_lock);
-
+ ret = regmap_raw_write(map, reg, buf, count);
return ret;
}
EXPORT_SYMBOL(pm860x_bulk_write);
@@ -110,18 +76,11 @@ int pm860x_set_bits(struct i2c_client *i2c, int reg,
unsigned char mask, unsigned char data)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
- unsigned char value;
+ struct regmap *map = (i2c == chip->client) ? chip->regmap
+ : chip->regmap_companion;
int ret;
- mutex_lock(&chip->io_lock);
- ret = pm860x_read_device(i2c, reg, 1, &value);
- if (ret < 0)
- goto out;
- value &= ~mask;
- value |= data;
- ret = pm860x_write_device(i2c, reg, 1, &value);
-out:
- mutex_unlock(&chip->io_lock);
+ ret = regmap_update_bits(map, reg, mask, data);
return ret;
}
EXPORT_SYMBOL(pm860x_set_bits);
@@ -300,11 +259,17 @@ static int verify_addr(struct i2c_client *i2c)
return 0;
}
+static struct regmap_config pm860x_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
static int __devinit pm860x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct pm860x_platform_data *pdata = client->dev.platform_data;
struct pm860x_chip *chip;
+ int ret;
if (!pdata) {
pr_info("No platform data in %s!\n", __func__);
@@ -316,10 +281,16 @@ static int __devinit pm860x_probe(struct i2c_client *client,
return -ENOMEM;
chip->id = verify_addr(client);
+ chip->regmap = regmap_init_i2c(client, &pm860x_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ ret = PTR_ERR(chip->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
chip->client = client;
i2c_set_clientdata(client, chip);
chip->dev = &client->dev;
- mutex_init(&chip->io_lock);
dev_set_drvdata(chip->dev, chip);
/*
@@ -333,6 +304,14 @@ static int __devinit pm860x_probe(struct i2c_client *client,
chip->companion_addr = pdata->companion_addr;
chip->companion = i2c_new_dummy(chip->client->adapter,
chip->companion_addr);
+ chip->regmap_companion = regmap_init_i2c(chip->companion,
+ &pm860x_regmap_config);
+ if (IS_ERR(chip->regmap_companion)) {
+ ret = PTR_ERR(chip->regmap_companion);
+ dev_err(&chip->companion->dev,
+ "Failed to allocate register map: %d\n", ret);
+ return ret;
+ }
i2c_set_clientdata(chip->companion, chip);
}
@@ -345,7 +324,11 @@ static int __devexit pm860x_remove(struct i2c_client *client)
struct pm860x_chip *chip = i2c_get_clientdata(client);
pm860x_device_exit(chip);
- i2c_unregister_device(chip->companion);
+ if (chip->companion) {
+ regmap_exit(chip->regmap_companion);
+ i2c_unregister_device(chip->companion);
+ }
+ regmap_exit(chip->regmap);
kfree(chip);
return 0;
}
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index a67adcb..1973b23 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -27,6 +27,7 @@ config MFD_CORE
config MFD_88PM860X
bool "Support Marvell 88PM8606/88PM8607"
depends on I2C=y && GENERIC_HARDIRQS
+ select REGMAP_I2C
select MFD_CORE
help
This supports for Marvell 88PM8606/88PM8607 Power Management IC.
diff --git a/include/linux/mfd/88pm860x.h b/include/linux/mfd/88pm860x.h
index 63b4fb8..92be347 100644
--- a/include/linux/mfd/88pm860x.h
+++ b/include/linux/mfd/88pm860x.h
@@ -297,10 +297,11 @@ enum {
struct pm860x_chip {
struct device *dev;
- struct mutex io_lock;
struct mutex irq_lock;
struct i2c_client *client;
struct i2c_client *companion; /* companion chip client */
+ struct regmap *regmap;
+ struct regmap *regmap_companion;
int buck3_double; /* DVC ramp slope double */
unsigned short companion_addr;
--
1.7.0.4
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