linux-imx

// SPDX-License-Identifier: GPL-2.0

// Copyright (C) 2018 ROHM Semiconductors

// bd70528-regulator.c ROHM BD70528MWV regulator driver

​

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/gpio.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/mfd/rohm-bd70528.h>

#include <linux/module.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/slab.h>

​

#define BUCK_RAMPRATE_250MV 0

#define BUCK_RAMPRATE_125MV 1

#define BUCK_RAMP_MAX 250

​

static const struct regulator_linear_range bd70528_buck1_volts[] = {

    REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 600000),

    REGULATOR_LINEAR_RANGE(2750000, 0x2, 0xf, 50000),

};

static const struct regulator_linear_range bd70528_buck2_volts[] = {

    REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x1, 300000),

    REGULATOR_LINEAR_RANGE(1550000, 0x2, 0xd, 50000),

    REGULATOR_LINEAR_RANGE(3000000, 0xe, 0xf, 300000),

};

static const struct regulator_linear_range bd70528_buck3_volts[] = {

    REGULATOR_LINEAR_RANGE(800000, 0x00, 0xd, 50000),

    REGULATOR_LINEAR_RANGE(1800000, 0xe, 0xf, 0),

};

​

/* All LDOs have same voltage ranges */

static const struct regulator_linear_range bd70528_ldo_volts[] = {

    REGULATOR_LINEAR_RANGE(1650000, 0x0, 0x07, 50000),

    REGULATOR_LINEAR_RANGE(2100000, 0x8, 0x0f, 100000),

    REGULATOR_LINEAR_RANGE(2850000, 0x10, 0x19, 50000),

    REGULATOR_LINEAR_RANGE(3300000, 0x19, 0x1f, 0),

};

​

/* Also both LEDs support same voltages */

static const unsigned int led_volts[] = {

    20000, 30000

};

​

static int bd70528_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)

{

    if (ramp_delay > 0 && ramp_delay <= BUCK_RAMP_MAX) {

        unsigned int ramp_value = BUCK_RAMPRATE_250MV;

​

        if (ramp_delay <= 125)

            ramp_value = BUCK_RAMPRATE_125MV;

​

        return regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,

                  BD70528_MASK_BUCK_RAMP,

                  ramp_value << BD70528_SIFT_BUCK_RAMP);

    }

    dev_err(&rdev->dev, "%s: ramp_delay: %d not supported\n",