1. 根目录:
2. include
3. linux
4. mfd
5. tps6105x.h

/*
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 *
 * License terms: GNU General Public License (GPL) version 2
 */
#ifndef MFD_TPS6105X_H
#define MFD_TPS6105X_H

#include <linux/i2c.h>
#include <linux/regulator/machine.h>

/*
 * Register definitions to all subdrivers
 */
#define TPS6105X_REG_0			0x00
#define TPS6105X_REG0_MODE_SHIFT	6
#define TPS6105X_REG0_MODE_MASK		(0x03<<6)
/* These defines for both reg0 and reg1 */
#define TPS6105X_REG0_MODE_SHUTDOWN	0x00
#define TPS6105X_REG0_MODE_TORCH	0x01
#define TPS6105X_REG0_MODE_TORCH_FLASH	0x02
#define TPS6105X_REG0_MODE_VOLTAGE	0x03
#define TPS6105X_REG0_VOLTAGE_SHIFT	4
#define TPS6105X_REG0_VOLTAGE_MASK	(3<<4)
#define TPS6105X_REG0_VOLTAGE_450	0
#define TPS6105X_REG0_VOLTAGE_500	1
#define TPS6105X_REG0_VOLTAGE_525	2
#define TPS6105X_REG0_VOLTAGE_500_2	3
#define TPS6105X_REG0_DIMMING_SHIFT	3
#define TPS6105X_REG0_TORCHC_SHIFT	0
#define TPS6105X_REG0_TORCHC_MASK	(7<<0)
#define TPS6105X_REG0_TORCHC_0		0x00
#define TPS6105X_REG0_TORCHC_50		0x01
#define TPS6105X_REG0_TORCHC_75		0x02
#define TPS6105X_REG0_TORCHC_100	0x03
#define TPS6105X_REG0_TORCHC_150	0x04
#define TPS6105X_REG0_TORCHC_200	0x05
#define TPS6105X_REG0_TORCHC_250_400	0x06
#define TPS6105X_REG0_TORCHC_250_500	0x07
#define TPS6105X_REG_1			0x01
#define TPS6105X_REG1_MODE_SHIFT	6
#define TPS6105X_REG1_MODE_MASK		(0x03<<6)
#define TPS6105X_REG1_MODE_SHUTDOWN	0x00
#define TPS6105X_REG1_MODE_TORCH	0x01
#define TPS6105X_REG1_MODE_TORCH_FLASH	0x02
#define TPS6105X_REG1_MODE_VOLTAGE	0x03
#define TPS6105X_REG_2			0x02
#define TPS6105X_REG_3			0x03

/**
 * enum tps6105x_mode - desired mode for the TPS6105x
 * @TPS6105X_MODE_SHUTDOWN: this instance is inactive, not used for anything
 * @TPS61905X_MODE_TORCH: this instance is used as a LED, usually a while
 *	LED, for example as backlight or flashlight. If this is set, the
 *	TPS6105X will register to the LED framework
 * @TPS6105X_MODE_TORCH_FLASH: this instance is used as a flashgun, usually
 *	in a camera
 * @TPS6105X_MODE_VOLTAGE: this instance is used as a voltage regulator and
 *	will register to the regulator framework
 */
enum tps6105x_mode {
	TPS6105X_MODE_SHUTDOWN,
	TPS6105X_MODE_TORCH,
	TPS6105X_MODE_TORCH_FLASH,
	TPS6105X_MODE_VOLTAGE,
};

/**
 * struct tps6105x_platform_data - TPS61905x platform data
 * @mode: what mode this instance shall be operated in,
 *	this is not selectable at runtime
 * @regulator_data: initialization data for the voltage
 *	regulator if used as a voltage source
 */
struct tps6105x_platform_data {
	enum tps6105x_mode mode;
	struct regulator_init_data *regulator_data;
};

/**
 * struct tps6105x - state holder for the TPS6105x drivers
 * @mutex: mutex to serialize I2C accesses
 * @i2c_client: corresponding I2C client
 * @regulator: regulator device if used in voltage mode
 */
struct tps6105x {
	struct tps6105x_platform_data *pdata;
	struct mutex		lock;
	struct i2c_client	*client;
	struct regulator_dev	*regulator;
};

extern int tps6105x_set(struct tps6105x *tps6105x, u8 reg, u8 value);
extern int tps6105x_get(struct tps6105x *tps6105x, u8 reg, u8 *buf);
extern int tps6105x_mask_and_set(struct tps6105x *tps6105x, u8 reg,
				 u8 bitmask, u8 bitvalues);

#endif