diff options
Diffstat (limited to 'drivers/mfd/88pm860x-i2c.c')
| -rw-r--r-- | drivers/mfd/88pm860x-i2c.c | 105 |
1 files changed, 44 insertions, 61 deletions
diff --git a/drivers/mfd/88pm860x-i2c.c b/drivers/mfd/88pm860x-i2c.c index f629d6f4e3e9..630f1b545fc4 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; } |