projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c93d08fa MWK |
1 | /* |
| 2 | * LP5521/LP5523/LP55231 Common Driver | |
| 3 | * | |
| 4 | * Copyright 2012 Texas Instruments | |
| 5 | * | |
| 6 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | * | |
| 12 | * Derived from leds-lp5521.c, leds-lp5523.c | |
| 13 | */ | |
| 14 | ||
| 15 | #include <linux/i2c.h> | |
| 16 | #include <linux/leds.h> | |
| 17 | #include <linux/module.h> | |
| 18 | #include <linux/platform_data/leds-lp55xx.h> | |
| 19 | ||
| 20 | #include "leds-lp55xx-common.h" | |
| 21 | ||
| 22 | int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val) | |
| 23 | { | |
| 24 | return i2c_smbus_write_byte_data(chip->cl, reg, val); | |
| 25 | } | |
| 26 | EXPORT_SYMBOL_GPL(lp55xx_write); | |
| 27 | ||
| 28 | int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val) | |
| 29 | { | |
| 30 | s32 ret; | |
| 31 | ||
| 32 | ret = i2c_smbus_read_byte_data(chip->cl, reg); | |
| 33 | if (ret < 0) | |
| 34 | return ret; | |
| 35 | ||
| 36 | *val = ret; | |
| 37 | return 0; | |
| 38 | } | |
| 39 | EXPORT_SYMBOL_GPL(lp55xx_read); | |
| 40 | ||
| 41 | int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val) | |
| 42 | { | |
| 43 | int ret; | |
| 44 | u8 tmp; | |
| 45 | ||
| 46 | ret = lp55xx_read(chip, reg, &tmp); | |
| 47 | if (ret) | |
| 48 | return ret; | |
| 49 | ||
| 50 | tmp &= ~mask; | |
| 51 | tmp |= val & mask; | |
| 52 | ||
| 53 | return lp55xx_write(chip, reg, tmp); | |
| 54 | } | |
| 55 | EXPORT_SYMBOL_GPL(lp55xx_update_bits); | |
| 56 | ||
| 57 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); | |
| 58 | MODULE_DESCRIPTION("LP55xx Common Driver"); | |
| 59 | MODULE_LICENSE("GPL"); |