// SPDX-License-Identifier: GPL-2.0-only
/*
 * Regulator driver for Ricoh RN5T618 PMIC
 *
 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
 */

#include <linux/mfd/rn5t618.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/of_regulator.h>

static const struct regulator_ops rn5t618_reg_ops = {
        .enable                 = regulator_enable_regmap,
        .disable                = regulator_disable_regmap,
        .is_enabled             = regulator_is_enabled_regmap,
        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
        .list_voltage           = regulator_list_voltage_linear,
};

#define REG(rid, ereg, emask, vreg, vmask, min, max, step)              \
        {                                                               \
                .name           = #rid,                                 \
                .of_match       = of_match_ptr(#rid),                   \
                .regulators_node = of_match_ptr("regulators"),          \
                .id             = RN5T618_##rid,                        \
                .type           = REGULATOR_VOLTAGE,                    \
                .owner          = THIS_MODULE,                          \
                .ops            = &rn5t618_reg_ops,                     \
                .n_voltages     = ((max) - (min)) / (step) + 1,         \
                .min_uV         = (min),                                \
                .uV_step        = (step),                               \
                .enable_reg     = RN5T618_##ereg,                       \
                .enable_mask    = (emask),                              \
                .vsel_reg       = RN5T618_##vreg,                       \
                .vsel_mask      = (vmask),                              \
        }

static const struct regulator_desc rn5t567_regulators[] = {
        /* DCDC */
        REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC4, DC4CTL, BIT(0), DC4DAC, 0xff, 600000, 3500000, 12500),
        /* LDO */
        REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
        REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
        /* LDO RTC */
        REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1200000, 3500000, 25000),
        REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
};

static const struct regulator_desc rn5t618_regulators[] = {
        /* DCDC */
        REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
        /* LDO */
        REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
        REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
        /* LDO RTC */
        REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
        REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
};

static const struct regulator_desc rc5t619_regulators[] = {
        /* DCDC */
        REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC4, DC4CTL, BIT(0), DC4DAC, 0xff, 600000, 3500000, 12500),
        REG(DCDC5, DC5CTL, BIT(0), DC5DAC, 0xff, 600000, 3500000, 12500),
        /* LDO */
        REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 600000, 3500000, 25000),
        REG(LDO6, LDOEN1, BIT(5), LDO6DAC, 0x7f, 600000, 3500000, 25000),
        REG(LDO7, LDOEN1, BIT(6), LDO7DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO8, LDOEN1, BIT(7), LDO8DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO9, LDOEN2, BIT(0), LDO9DAC, 0x7f, 900000, 3500000, 25000),
        REG(LDO10, LDOEN2, BIT(1), LDO10DAC, 0x7f, 900000, 3500000, 25000),
        /* LDO RTC */
        REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
        REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
};

static int rn5t618_regulator_probe(struct platform_device *pdev)
{
        struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
        struct regulator_config config = { };
        struct regulator_dev *rdev;
        const struct regulator_desc *regulators;
        int i;
        int num_regulators = 0;

        switch (rn5t618->variant) {
        case RN5T567:
                regulators = rn5t567_regulators;
                num_regulators = ARRAY_SIZE(rn5t567_regulators);
                break;
        case RN5T618:
                regulators = rn5t618_regulators;
                num_regulators = ARRAY_SIZE(rn5t618_regulators);
                break;
        case RC5T619:
                regulators = rc5t619_regulators;
                num_regulators = ARRAY_SIZE(rc5t619_regulators);
                break;
        default:
                return -EINVAL;
        }

        config.dev = pdev->dev.parent;
        config.regmap = rn5t618->regmap;

        for (i = 0; i < num_regulators; i++) {
                rdev = devm_regulator_register(&pdev->dev,
                                               &regulators[i],
                                               &config);
                if (IS_ERR(rdev)) {
                        dev_err(&pdev->dev, "failed to register %s regulator\n",
                                regulators[i].name);
                        return PTR_ERR(rdev);
                }
        }

        return 0;
}

static struct platform_driver rn5t618_regulator_driver = {
        .probe = rn5t618_regulator_probe,
        .driver = {
                .name   = "rn5t618-regulator",
                .probe_type = PROBE_PREFER_ASYNCHRONOUS,
        },
};

module_platform_driver(rn5t618_regulator_driver);

MODULE_ALIAS("platform:rn5t618-regulator");
MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
MODULE_DESCRIPTION("RN5T618 regulator driver");
MODULE_LICENSE("GPL v2");