linux-imx

/*

 * Core driver for TPS61050/61052 boost converters, used for while LED

 * driving, audio power amplification, white LED flash, and generic

 * boost conversion. Additionally it provides a 1-bit GPIO pin (out or in)

 * and a flash synchronization pin to synchronize flash events when used as

 * flashgun.

 *

 * 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

 */

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/i2c.h>

#include <linux/regmap.h>

#include <linux/gpio.h>

#include <linux/spinlock.h>

#include <linux/slab.h>

#include <linux/err.h>

#include <linux/mfd/core.h>

#include <linux/mfd/tps6105x.h>

​

static struct regmap_config tps6105x_regmap_config = {

    .reg_bits = 8,

    .val_bits = 8,

    .max_register = TPS6105X_REG_3,

};

​

static int tps6105x_startup(struct tps6105x *tps6105x)

{

    int ret;

    unsigned int regval;

​

    ret = regmap_read(tps6105x->regmap, TPS6105X_REG_0, &regval);

    if (ret)

        return ret;

    switch (regval >> TPS6105X_REG0_MODE_SHIFT) {

    case TPS6105X_REG0_MODE_SHUTDOWN:

        dev_info(&tps6105x->client->dev,

             "TPS6105x found in SHUTDOWN mode\n");

        break;

    case TPS6105X_REG0_MODE_TORCH:

        dev_info(&tps6105x->client->dev,

             "TPS6105x found in TORCH mode\n");

        break;

    case TPS6105X_REG0_MODE_TORCH_FLASH:

        dev_info(&tps6105x->client->dev,

             "TPS6105x found in FLASH mode\n");

        break;

    case TPS6105X_REG0_MODE_VOLTAGE:

        dev_info(&tps6105x->client->dev,

             "TPS6105x found in VOLTAGE mode\n");

        break;

    default:

        break;

    }

​

    return ret;

}

​

/*

 * MFD cells - we always have a GPIO cell and we have one cell

 * which is selected operation mode.

 */

static struct mfd_cell tps6105x_gpio_cell = {

    .name = "tps6105x-gpio",

};

​

static struct mfd_cell tps6105x_leds_cell = {

    .name = "tps6105x-leds",

};

​

static struct mfd_cell tps6105x_flash_cell = {

    .name = "tps6105x-flash",

};

​

static struct mfd_cell tps6105x_regulator_cell = {

    .name = "tps6105x-regulator",

};

​

static int tps6105x_add_device(struct tps6105x *tps6105x,

                   struct mfd_cell *cell)

{

    cell->platform_data = tps6105x;

    cell->pdata_size = sizeof(*tps6105x);

​

    return mfd_add_devices(&tps6105x->client->dev,

                   PLATFORM_DEVID_AUTO, cell, 1, NULL, 0, NULL);