linux-imx

/*

 * Device driver for regulators in Hi655x IC

 *

 * Copyright (c) 2016 Hisilicon.

 *

 * Authors:

 * Chen Feng <puck.chen@hisilicon.com>

 * Fei  Wang <w.f@huawei.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#include <linux/bitops.h>

#include <linux/device.h>

#include <linux/err.h>

#include <linux/module.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/mfd/hi655x-pmic.h>

​

struct hi655x_regulator {

    unsigned int disable_reg;

    unsigned int status_reg;

    unsigned int ctrl_mask;

    struct regulator_desc rdesc;

};

​

/* LDO7 & LDO10 */

static const unsigned int ldo7_voltages[] = {

    1800000, 1850000, 2850000, 2900000,

    3000000, 3100000, 3200000, 3300000,

};

​

static const unsigned int ldo19_voltages[] = {

    1800000, 1850000, 1900000, 1750000,

    2800000, 2850000, 2900000, 3000000,

};

​

static const unsigned int ldo22_voltages[] = {

     900000, 1000000, 1050000, 1100000,

    1150000, 1175000, 1185000, 1200000,

};

​

enum hi655x_regulator_id {

    HI655X_LDO0,

    HI655X_LDO1,

    HI655X_LDO2,

    HI655X_LDO3,

    HI655X_LDO4,

    HI655X_LDO5,

    HI655X_LDO6,

    HI655X_LDO7,

    HI655X_LDO8,

    HI655X_LDO9,

    HI655X_LDO10,

    HI655X_LDO11,

    HI655X_LDO12,

    HI655X_LDO13,

    HI655X_LDO14,

    HI655X_LDO15,

    HI655X_LDO16,

    HI655X_LDO17,

    HI655X_LDO18,

    HI655X_LDO19,

    HI655X_LDO20,

    HI655X_LDO21,

    HI655X_LDO22,

};

​

static int hi655x_is_enabled(struct regulator_dev *rdev)

{

    unsigned int value = 0;

​

    struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);

​

    regmap_read(rdev->regmap, regulator->status_reg, &value);

    return (value & BIT(regulator->ctrl_mask));

}

​

static int hi655x_disable(struct regulator_dev *rdev)

{

    int ret = 0;

​

    struct hi655x_regulator *regulator = rdev_get_drvdata(rdev);

​