diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/base/regmap/regmap-i2c.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/base/regmap/regmap-i2c.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/ANDROID_3.4.5/drivers/base/regmap/regmap-i2c.c b/ANDROID_3.4.5/drivers/base/regmap/regmap-i2c.c deleted file mode 100644 index 9a3a8c56..00000000 --- a/ANDROID_3.4.5/drivers/base/regmap/regmap-i2c.c +++ /dev/null @@ -1,131 +0,0 @@ -/* - * Register map access API - I2C support - * - * Copyright 2011 Wolfson Microelectronics plc - * - * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/regmap.h> -#include <linux/i2c.h> -#include <linux/module.h> -#include <linux/init.h> - -static int regmap_i2c_write(struct device *dev, const void *data, size_t count) -{ - struct i2c_client *i2c = to_i2c_client(dev); - int ret; - - ret = i2c_master_send(i2c, data, count); - if (ret == count) - return 0; - else if (ret < 0) - return ret; - else - return -EIO; -} - -static int regmap_i2c_gather_write(struct device *dev, - const void *reg, size_t reg_size, - const void *val, size_t val_size) -{ - struct i2c_client *i2c = to_i2c_client(dev); - struct i2c_msg xfer[2]; - int ret; - - /* If the I2C controller can't do a gather tell the core, it - * will substitute in a linear write for us. - */ - if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_PROTOCOL_MANGLING)) - return -ENOTSUPP; - - xfer[0].addr = i2c->addr; - xfer[0].flags = 0; - xfer[0].len = reg_size; - xfer[0].buf = (void *)reg; - - xfer[1].addr = i2c->addr; - xfer[1].flags = I2C_M_NOSTART; - xfer[1].len = val_size; - xfer[1].buf = (void *)val; - - ret = i2c_transfer(i2c->adapter, xfer, 2); - if (ret == 2) - return 0; - if (ret < 0) - return ret; - else - return -EIO; -} - -static int regmap_i2c_read(struct device *dev, - const void *reg, size_t reg_size, - void *val, size_t val_size) -{ - struct i2c_client *i2c = to_i2c_client(dev); - struct i2c_msg xfer[2]; - int ret; - - xfer[0].addr = i2c->addr; - xfer[0].flags = 0; - xfer[0].len = reg_size; - xfer[0].buf = (void *)reg; - - xfer[1].addr = i2c->addr; - xfer[1].flags = I2C_M_RD; - xfer[1].len = val_size; - xfer[1].buf = val; - - ret = i2c_transfer(i2c->adapter, xfer, 2); - if (ret == 2) - return 0; - else if (ret < 0) - return ret; - else - return -EIO; -} - -static struct regmap_bus regmap_i2c = { - .write = regmap_i2c_write, - .gather_write = regmap_i2c_gather_write, - .read = regmap_i2c_read, -}; - -/** - * regmap_init_i2c(): Initialise register map - * - * @i2c: Device that will be interacted with - * @config: Configuration for register map - * - * The return value will be an ERR_PTR() on error or a valid pointer to - * a struct regmap. - */ -struct regmap *regmap_init_i2c(struct i2c_client *i2c, - const struct regmap_config *config) -{ - return regmap_init(&i2c->dev, ®map_i2c, config); -} -EXPORT_SYMBOL_GPL(regmap_init_i2c); - -/** - * devm_regmap_init_i2c(): Initialise managed register map - * - * @i2c: Device that will be interacted with - * @config: Configuration for register map - * - * The return value will be an ERR_PTR() on error or a valid pointer - * to a struct regmap. The regmap will be automatically freed by the - * device management code. - */ -struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c, - const struct regmap_config *config) -{ - return devm_regmap_init(&i2c->dev, ®map_i2c, config); -} -EXPORT_SYMBOL_GPL(devm_regmap_init_i2c); - -MODULE_LICENSE("GPL"); |