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
  22 static 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
  49 static 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
  66 static 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
  82 static 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
 121 static struct platform_driver rn5t618_regulator_driver = {
 122         .probe = rn5t618_regulator_probe,
 123         .driver = {
 124                 .name   = "rn5t618-regulator",
 125         },
 126 };
 127
 128 module_platform_driver(rn5t618_regulator_driver);
 129
 130 MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
 131 MODULE_DESCRIPTION("RN5T618 regulator driver");
 132 MODULE_LICENSE("GPL v2");