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/*
 * tps65912-i2c.c  --  I2C access for TI TPS65912x PMIC
 *
 * Copyright 2011 Texas Instruments Inc.
 *
 * Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under  the terms of the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the License, or (at your
 *  option) any later version.
 *
 *  This driver is based on wm8350 implementation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps65912.h>

static int tps65912_i2c_read(struct tps65912 *tps65912, u8 reg,
				  int bytes, void *dest)
{
	struct i2c_client *i2c = tps65912->control_data;
	struct i2c_msg xfer[2];
	int ret;

	/* Write register */
	xfer[0].addr = i2c->addr;
	xfer[0].flags = 0;
	xfer[0].len = 1;
	xfer[0].buf = &reg;

	/* Read data */
	xfer[1].addr = i2c->addr;
	xfer[1].flags = I2C_M_RD;
	xfer[1].len = bytes;
	xfer[1].buf = dest;

	ret = i2c_transfer(i2c->adapter, xfer, 2);
	if (ret == 2)
		ret = 0;
	else if (ret >= 0)
		ret = -EIO;
	return ret;
}

static int tps65912_i2c_write(struct tps65912 *tps65912, u8 reg,
				   int bytes, void *src)
{
	struct i2c_client *i2c = tps65912->control_data;
	/* we add 1 byte for device register */
	u8 msg[TPS6591X_MAX_REGISTER + 1];
	int ret;

	if (bytes > TPS6591X_MAX_REGISTER)
		return -EINVAL;

	msg[0] = reg;
	memcpy(&msg[1], src, bytes);

	ret = i2c_master_send(i2c, msg, bytes + 1);
	if (ret < 0)
		return ret;
	if (ret != bytes + 1)
		return -EIO;

	return 0;
}

static int tps65912_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct tps65912 *tps65912;