From 08b8c4999084e91b7bfa58a74ff864b96f1e3b32 Mon Sep 17 00:00:00 2001 From: Jonghwan Choi Date: Mon, 24 Oct 2011 22:26:26 +0900 Subject: [PATCH] regulator: max8649 Convert max8649 to use regmap api Signed-off-by: Jonghwan Choi Signed-off-by: Mark Brown --- 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 9713b1b860cb..4e919b2ac7ee 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -93,6 +93,7 @@ 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 1062cf9f02dc..c54d0ad18c73 100644 --- a/drivers/regulator/max8649.c +++ b/drivers/regulator/max8649.c @@ -16,6 +16,7 @@ #include #include #include +#include #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 DIV_ROUND_UP(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); } -- 2.39.5