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Message-Id: <1319462786-2602-1-git-send-email-jhbird.choi@gmail.com>
Date: Mon, 24 Oct 2011 22:26:26 +0900
From: jhbird.choi@...il.com
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Mark Brown <broonie@...nsource.wolfsonmicro.com>,
Liam Girdwood <lrg@...com>,
Haojian Zhuang <haojian.zhuang@...vell.com>,
Jonghwan Choi <jhbird.choi@...il.com>
Subject: [PATCH v2] regulator: max8649 Convert max8649 to use regmap api
From: Jonghwan Choi <jhbird.choi@...il.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@...il.com>
---
drivers/regulator/Kconfig | 1 +
drivers/regulator/max8649.c | 155 +++++++++++++++----------------------------
2 files changed, 56 insertions(+), 100 deletions(-)
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index c7fd2c0..c4f9e1c 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -83,6 +83,7 @@ config REGULATOR_MAX1586
config REGULATOR_MAX8649
tristate "Maxim 8649 voltage regulator"
depends on I2C
+ select REGMAP_I2C
help
This driver controls a Maxim 8649 voltage output regulator via
I2C bus.
diff --git a/drivers/regulator/max8649.c b/drivers/regulator/max8649.c
index 30eb9e5..1143bb4 100644
--- a/drivers/regulator/max8649.c
+++ b/drivers/regulator/max8649.c
@@ -16,6 +16,7 @@
#include <linux/regulator/driver.h>
#include <linux/slab.h>
#include <linux/regulator/max8649.h>
+#include <linux/regmap.h>
#define MAX8649_DCDC_VMIN 750000 /* uV */
#define MAX8649_DCDC_VMAX 1380000 /* uV */
@@ -49,9 +50,8 @@
struct max8649_regulator_info {
struct regulator_dev *regulator;
- struct i2c_client *i2c;
struct device *dev;
- struct mutex io_lock;
+ struct regmap *regmap;
int vol_reg;
unsigned mode:2; /* bit[1:0] = VID1, VID0 */
@@ -63,71 +63,6 @@ struct max8649_regulator_info {
/* I2C operations */
-static inline int max8649_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 max8649_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;
-}
-
-static int max8649_reg_read(struct i2c_client *i2c, int reg)
-{
- struct max8649_regulator_info *info = i2c_get_clientdata(i2c);
- unsigned char data;
- int ret;
-
- mutex_lock(&info->io_lock);
- ret = max8649_read_device(i2c, reg, 1, &data);
- mutex_unlock(&info->io_lock);
-
- if (ret < 0)
- return ret;
- return (int)data;
-}
-
-static int max8649_set_bits(struct i2c_client *i2c, int reg,
- unsigned char mask, unsigned char data)
-{
- struct max8649_regulator_info *info = i2c_get_clientdata(i2c);
- unsigned char value;
- int ret;
-
- mutex_lock(&info->io_lock);
- ret = max8649_read_device(i2c, reg, 1, &value);
- if (ret < 0)
- goto out;
- value &= ~mask;
- value |= data;
- ret = max8649_write_device(i2c, reg, 1, &value);
-out:
- mutex_unlock(&info->io_lock);
- return ret;
-}
-
static inline int check_range(int min_uV, int max_uV)
{
if ((min_uV < MAX8649_DCDC_VMIN) || (max_uV > MAX8649_DCDC_VMAX)
@@ -144,13 +79,14 @@ static int max8649_list_voltage(struct regulator_dev *rdev, unsigned index)
static int max8649_get_voltage(struct regulator_dev *rdev)
{
struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
+ unsigned int val;
unsigned char data;
int ret;
- ret = max8649_reg_read(info->i2c, info->vol_reg);
- if (ret < 0)
+ ret = regmap_read(info->regmap, info->vol_reg, &val);
+ if (ret != 0)
return ret;
- data = (unsigned char)ret & MAX8649_VOL_MASK;
+ data = (unsigned char)val & MAX8649_VOL_MASK;
return max8649_list_voltage(rdev, data);
}
@@ -170,14 +106,14 @@ static int max8649_set_voltage(struct regulator_dev *rdev,
mask = MAX8649_VOL_MASK;
*selector = data & mask;
- return max8649_set_bits(info->i2c, info->vol_reg, mask, data);
+ return regmap_update_bits(info->regmap, info->vol_reg, mask, data);
}
/* EN_PD means pulldown on EN input */
static int max8649_enable(struct regulator_dev *rdev)
{
struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
- return max8649_set_bits(info->i2c, MAX8649_CONTROL, MAX8649_EN_PD, 0);
+ return regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_EN_PD, 0);
}
/*
@@ -187,38 +123,40 @@ static int max8649_enable(struct regulator_dev *rdev)
static int max8649_disable(struct regulator_dev *rdev)
{
struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
- return max8649_set_bits(info->i2c, MAX8649_CONTROL, MAX8649_EN_PD,
+ return regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_EN_PD,
MAX8649_EN_PD);
}
static int max8649_is_enabled(struct regulator_dev *rdev)
{
struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
+ unsigned int val;
int ret;
- ret = max8649_reg_read(info->i2c, MAX8649_CONTROL);
- if (ret < 0)
+ ret = regmap_read(info->regmap, MAX8649_CONTROL, &val);
+ if (ret != 0)
return ret;
- return !((unsigned char)ret & MAX8649_EN_PD);
+ return !((unsigned char)val & MAX8649_EN_PD);
}
static int max8649_enable_time(struct regulator_dev *rdev)
{
struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
int voltage, rate, ret;
+ unsigned int val;
/* get voltage */
- ret = max8649_reg_read(info->i2c, info->vol_reg);
- if (ret < 0)
+ ret = regmap_read(info->regmap, info->vol_reg, &val);
+ if (ret != 0)
return ret;
- ret &= MAX8649_VOL_MASK;
+ val &= MAX8649_VOL_MASK;
voltage = max8649_list_voltage(rdev, (unsigned char)ret); /* uV */
/* get rate */
- ret = max8649_reg_read(info->i2c, MAX8649_RAMP);
- if (ret < 0)
+ ret = regmap_read(info->regmap, MAX8649_RAMP, &val);
+ if (ret != 0)
return ret;
- ret = (ret & MAX8649_RAMP_MASK) >> 5;
+ ret = (val & MAX8649_RAMP_MASK) >> 5;
rate = (32 * 1000) >> ret; /* uV/uS */
return (voltage / rate);
@@ -230,12 +168,12 @@ static int max8649_set_mode(struct regulator_dev *rdev, unsigned int mode)
switch (mode) {
case REGULATOR_MODE_FAST:
- max8649_set_bits(info->i2c, info->vol_reg, MAX8649_FORCE_PWM,
- MAX8649_FORCE_PWM);
+ regmap_update_bits(info->regmap, info->vol_reg, MAX8649_FORCE_PWM,
+ MAX8649_FORCE_PWM);
break;
case REGULATOR_MODE_NORMAL:
- max8649_set_bits(info->i2c, info->vol_reg,
- MAX8649_FORCE_PWM, 0);
+ regmap_update_bits(info->regmap, info->vol_reg,
+ MAX8649_FORCE_PWM, 0);
break;
default:
return -EINVAL;
@@ -246,10 +184,13 @@ static int max8649_set_mode(struct regulator_dev *rdev, unsigned int mode)
static unsigned int max8649_get_mode(struct regulator_dev *rdev)
{
struct max8649_regulator_info *info = rdev_get_drvdata(rdev);
+ unsigned int val;
int ret;
- ret = max8649_reg_read(info->i2c, info->vol_reg);
- if (ret & MAX8649_FORCE_PWM)
+ ret = regmap_read(info->regmap, info->vol_reg, &val);
+ if (ret != 0)
+ return ret;
+ if (val & MAX8649_FORCE_PWM)
return REGULATOR_MODE_FAST;
return REGULATOR_MODE_NORMAL;
}
@@ -275,11 +216,17 @@ static struct regulator_desc dcdc_desc = {
.owner = THIS_MODULE,
};
+static struct regmap_config max8649_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
static int __devinit max8649_regulator_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max8649_platform_data *pdata = client->dev.platform_data;
struct max8649_regulator_info *info = NULL;
+ unsigned int val;
unsigned char data;
int ret;
@@ -289,9 +236,14 @@ static int __devinit max8649_regulator_probe(struct i2c_client *client,
return -ENOMEM;
}
- info->i2c = client;
+ info->regmap = regmap_init_i2c(client, &max8649_regmap_config);
+ if (IS_ERR(info->regmap)) {
+ ret = PTR_ERR(info->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n", ret);
+ goto fail;
+ }
+
info->dev = &client->dev;
- mutex_init(&info->io_lock);
i2c_set_clientdata(client, info);
info->mode = pdata->mode;
@@ -312,8 +264,8 @@ static int __devinit max8649_regulator_probe(struct i2c_client *client,
break;
}
- ret = max8649_reg_read(info->i2c, MAX8649_CHIP_ID1);
- if (ret < 0) {
+ ret = regmap_read(info->regmap, MAX8649_CHIP_ID1, &val);
+ if (ret != 0) {
dev_err(info->dev, "Failed to detect ID of MAX8649:%d\n",
ret);
goto out;
@@ -321,29 +273,29 @@ static int __devinit max8649_regulator_probe(struct i2c_client *client,
dev_info(info->dev, "Detected MAX8649 (ID:%x)\n", ret);
/* enable VID0 & VID1 */
- max8649_set_bits(info->i2c, MAX8649_CONTROL, MAX8649_VID_MASK, 0);
+ regmap_update_bits(info->regmap, MAX8649_CONTROL, MAX8649_VID_MASK, 0);
/* enable/disable external clock synchronization */
info->extclk = pdata->extclk;
data = (info->extclk) ? MAX8649_SYNC_EXTCLK : 0;
- max8649_set_bits(info->i2c, info->vol_reg, MAX8649_SYNC_EXTCLK, data);
+ regmap_update_bits(info->regmap, info->vol_reg, MAX8649_SYNC_EXTCLK, data);
if (info->extclk) {
/* set external clock frequency */
info->extclk_freq = pdata->extclk_freq;
- max8649_set_bits(info->i2c, MAX8649_SYNC, MAX8649_EXT_MASK,
- info->extclk_freq << 6);
+ regmap_update_bits(info->regmap, MAX8649_SYNC, MAX8649_EXT_MASK,
+ info->extclk_freq << 6);
}
if (pdata->ramp_timing) {
info->ramp_timing = pdata->ramp_timing;
- max8649_set_bits(info->i2c, MAX8649_RAMP, MAX8649_RAMP_MASK,
- info->ramp_timing << 5);
+ regmap_update_bits(info->regmap, MAX8649_RAMP, MAX8649_RAMP_MASK,
+ info->ramp_timing << 5);
}
info->ramp_down = pdata->ramp_down;
if (info->ramp_down) {
- max8649_set_bits(info->i2c, MAX8649_RAMP, MAX8649_RAMP_DOWN,
- MAX8649_RAMP_DOWN);
+ regmap_update_bits(info->regmap, MAX8649_RAMP, MAX8649_RAMP_DOWN,
+ MAX8649_RAMP_DOWN);
}
info->regulator = regulator_register(&dcdc_desc, &client->dev,
@@ -358,6 +310,8 @@ static int __devinit max8649_regulator_probe(struct i2c_client *client,
dev_info(info->dev, "Max8649 regulator device is detected.\n");
return 0;
out:
+ regmap_exit(info->regmap);
+fail:
kfree(info);
return ret;
}
@@ -369,6 +323,7 @@ static int __devexit max8649_regulator_remove(struct i2c_client *client)
if (info) {
if (info->regulator)
regulator_unregister(info->regulator);
+ regmap_exit(info->regmap);
kfree(info);
}
--
1.7.1
--
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