linux-imx

/*

 * arizona-ldo1.c  --  LDO1 supply for Arizona devices

 *

 * Copyright 2012 Wolfson Microelectronics PLC.

 *

 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>

 *

 *  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.

 */

​

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/init.h>

#include <linux/bitops.h>

#include <linux/err.h>

#include <linux/of.h>

#include <linux/gpio/consumer.h>

#include <linux/platform_device.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/slab.h>

​

#include <linux/regulator/arizona-ldo1.h>

​

#include <linux/mfd/arizona/core.h>

#include <linux/mfd/arizona/pdata.h>

#include <linux/mfd/arizona/registers.h>

​

struct arizona_ldo1 {

    struct regulator_dev *regulator;

    struct regmap *regmap;

​

    struct regulator_consumer_supply supply;

    struct regulator_init_data init_data;

​

    struct gpio_desc *ena_gpiod;

};

​

static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,

                       unsigned sel)

{

    struct regmap *regmap = rdev_get_regmap(rdev);

    unsigned int val;

    int ret;

​

    if (sel == rdev->desc->n_voltages - 1)

        val = ARIZONA_LDO1_HI_PWR;

    else

        val = 0;

​

    ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,

                 ARIZONA_LDO1_HI_PWR, val);

    if (ret != 0)

        return ret;

​

    if (val)

        return 0;

​

    return regulator_set_voltage_sel_regmap(rdev, sel);