| /* |
| * LP5521/LP5523/LP55231 Common Driver |
| * |
| * Copyright 2012 Texas Instruments |
| * |
| * Author: Milo(Woogyom) Kim <milo.kim@ti.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. |
| * |
| * Derived from leds-lp5521.c, leds-lp5523.c |
| */ |
| |
| #include <linux/i2c.h> |
| #include <linux/leds.h> |
| #include <linux/module.h> |
| #include <linux/platform_data/leds-lp55xx.h> |
| |
| #include "leds-lp55xx-common.h" |
| |
| int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val) |
| { |
| return i2c_smbus_write_byte_data(chip->cl, reg, val); |
| } |
| EXPORT_SYMBOL_GPL(lp55xx_write); |
| |
| int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val) |
| { |
| s32 ret; |
| |
| ret = i2c_smbus_read_byte_data(chip->cl, reg); |
| if (ret < 0) |
| return ret; |
| |
| *val = ret; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(lp55xx_read); |
| |
| int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val) |
| { |
| int ret; |
| u8 tmp; |
| |
| ret = lp55xx_read(chip, reg, &tmp); |
| if (ret) |
| return ret; |
| |
| tmp &= ~mask; |
| tmp |= val & mask; |
| |
| return lp55xx_write(chip, reg, tmp); |
| } |
| EXPORT_SYMBOL_GPL(lp55xx_update_bits); |
| |
| MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
| MODULE_DESCRIPTION("LP55xx Common Driver"); |
| MODULE_LICENSE("GPL"); |