LXR linux/drivers/regulator/rn5t618-regulator.c

   1/*
   2 * Regulator driver for Ricoh RN5T618 PMIC
   3 *
   4 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * version 2 as published by the Free Software Foundation.
   9 *
  10 * You should have received a copy of the GNU General Public License
  11 * along with this program. If not, see <http://www.gnu.org/licenses/>.
  12 */
  13
  14#include <linux/mfd/rn5t618.h>
  15#include <linux/module.h>
  16#include <linux/of.h>
  17#include <linux/platform_device.h>
  18#include <linux/regmap.h>
  19#include <linux/regulator/driver.h>
  20#include <linux/regulator/of_regulator.h>
  21
  22static const struct regulator_ops rn5t618_reg_ops = {
  23        .enable                 = regulator_enable_regmap,
  24        .disable                = regulator_disable_regmap,
  25        .is_enabled             = regulator_is_enabled_regmap,
  26        .set_voltage_sel        = regulator_set_voltage_sel_regmap,
  27        .get_voltage_sel        = regulator_get_voltage_sel_regmap,
  28        .list_voltage           = regulator_list_voltage_linear,
  29};
  30
  31#define REG(rid, ereg, emask, vreg, vmask, min, max, step)              \
  32        [RN5T618_##rid] = {                                             \
  33                .name           = #rid,                                 \
  34                .of_match       = of_match_ptr(#rid),                   \
  35                .regulators_node = of_match_ptr("regulators"),          \
  36                .id             = RN5T618_##rid,                        \
  37                .type           = REGULATOR_VOLTAGE,                    \
  38                .owner          = THIS_MODULE,                          \
  39                .ops            = &rn5t618_reg_ops,                     \
  40                .n_voltages     = ((max) - (min)) / (step) + 1,         \
  41                .min_uV         = (min),                                \
  42                .uV_step        = (step),                               \
  43                .enable_reg     = RN5T618_##ereg,                       \
  44                .enable_mask    = (emask),                              \
  45                .vsel_reg       = RN5T618_##vreg,                       \
  46                .vsel_mask      = (vmask),                              \
  47        }
  48
  49static struct regulator_desc rn5t567_regulators[] = {
  50        /* DCDC */
  51        REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
  52        REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
  53        REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
  54        REG(DCDC4, DC4CTL, BIT(0), DC4DAC, 0xff, 600000, 3500000, 12500),
  55        /* LDO */
  56        REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
  57        REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
  58        REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
  59        REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
  60        REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
  61        /* LDO RTC */
  62        REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1200000, 3500000, 25000),
  63        REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
  64};
  65
  66static struct regulator_desc rn5t618_regulators[] = {
  67        /* DCDC */
  68        REG(DCDC1, DC1CTL, BIT(0), DC1DAC, 0xff, 600000, 3500000, 12500),
  69        REG(DCDC2, DC2CTL, BIT(0), DC2DAC, 0xff, 600000, 3500000, 12500),
  70        REG(DCDC3, DC3CTL, BIT(0), DC3DAC, 0xff, 600000, 3500000, 12500),
  71        /* LDO */
  72        REG(LDO1, LDOEN1, BIT(0), LDO1DAC, 0x7f, 900000, 3500000, 25000),
  73        REG(LDO2, LDOEN1, BIT(1), LDO2DAC, 0x7f, 900000, 3500000, 25000),
  74        REG(LDO3, LDOEN1, BIT(2), LDO3DAC, 0x7f, 600000, 3500000, 25000),
  75        REG(LDO4, LDOEN1, BIT(3), LDO4DAC, 0x7f, 900000, 3500000, 25000),
  76        REG(LDO5, LDOEN1, BIT(4), LDO5DAC, 0x7f, 900000, 3500000, 25000),
  77        /* LDO RTC */
  78        REG(LDORTC1, LDOEN2, BIT(4), LDORTCDAC, 0x7f, 1700000, 3500000, 25000),
  79        REG(LDORTC2, LDOEN2, BIT(5), LDORTC2DAC, 0x7f, 900000, 3500000, 25000),
  80};
  81
  82static int rn5t618_regulator_probe(struct platform_device *pdev)
  83{
  84        struct rn5t618 *rn5t618 = dev_get_drvdata(pdev->dev.parent);
  85        struct regulator_config config = { };
  86        struct regulator_dev *rdev;
  87        struct regulator_desc *regulators;
  88        int i;
  89
  90        switch (rn5t618->variant) {
  91        case RN5T567:
  92                regulators = rn5t567_regulators;
  93                break;
  94        case RN5T618:
  95                regulators = rn5t618_regulators;
  96                break;
  97        default:
  98                return -EINVAL;
  99        }
 100
 101        config.dev = pdev->dev.parent;
 102        config.regmap = rn5t618->regmap;
 103
 104        for (i = 0; i < RN5T618_REG_NUM; i++) {
 105                if (!regulators[i].name)
 106                        continue;
 107
 108                rdev = devm_regulator_register(&pdev->dev,
 109                                               &regulators[i],
 110                                               &config);
 111                if (IS_ERR(rdev)) {
 112                        dev_err(&pdev->dev, "failed to register %s regulator\n",
 113                                regulators[i].name);
 114                        return PTR_ERR(rdev);
 115                }
 116        }
 117
 118        return 0;
 119}
 120
 121static struct platform_driver rn5t618_regulator_driver = {
 122        .probe = rn5t618_regulator_probe,
 123        .driver = {
 124                .name   = "rn5t618-regulator",
 125        },
 126};
 127
 128module_platform_driver(rn5t618_regulator_driver);
 129
 130MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
 131MODULE_DESCRIPTION("RN5T618 regulator driver");
 132MODULE_LICENSE("GPL v2");
 133