linux-imx

/*

 * Base driver for Analog Devices ADP5520/ADP5501 MFD PMICs

 * LCD Backlight: drivers/video/backlight/adp5520_bl

 * LEDs     : drivers/led/leds-adp5520

 * GPIO     : drivers/gpio/adp5520-gpio (ADP5520 only)

 * Keys     : drivers/input/keyboard/adp5520-keys (ADP5520 only)

 *

 * Copyright 2009 Analog Devices Inc.

 *

 * Author: Michael Hennerich <michael.hennerich@analog.com>

 *

 * Derived from da903x:

 * Copyright (C) 2008 Compulab, Ltd.

 *  Mike Rapoport <mike@compulab.co.il>

 *

 * Copyright (C) 2006-2008 Marvell International Ltd.

 *  Eric Miao <eric.miao@marvell.com>

 *

 * Licensed under the GPL-2 or later.

 */

​

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/err.h>

#include <linux/i2c.h>

​

#include <linux/mfd/adp5520.h>

​

struct adp5520_chip {

    struct i2c_client *client;

    struct device *dev;

    struct mutex lock;

    struct blocking_notifier_head notifier_list;

    int irq;

    unsigned long id;

    uint8_t mode;

};

​

static int __adp5520_read(struct i2c_client *client,

                int reg, uint8_t *val)

{

    int ret;

​

    ret = i2c_smbus_read_byte_data(client, reg);

    if (ret < 0) {

        dev_err(&client->dev, "failed reading at 0x%02x\n", reg);

        return ret;

    }

​

    *val = (uint8_t)ret;

    return 0;

}

​

static int __adp5520_write(struct i2c_client *client,

                 int reg, uint8_t val)

{

    int ret;

​

    ret = i2c_smbus_write_byte_data(client, reg, val);