drivers/regulator/tps65218-regulator.c

   1 /*
   2  * tps65218-regulator.c
   3  *
   4  * Regulator driver for TPS65218 PMIC
   5  *
   6  * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  13  * kind, whether expressed or implied; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License version 2 for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/device.h>
  21 #include <linux/init.h>
  22 #include <linux/err.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/of_device.h>
  25 #include <linux/regulator/of_regulator.h>
  26 #include <linux/regulator/driver.h>
  27 #include <linux/regulator/machine.h>
  28 #include <linux/mfd/tps65218.h>
  29
  30 static unsigned int tps65218_ramp_delay = 4000;
  31
  32 enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, DCDC5, DCDC6, LDO1 };
  33
  34 #define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, _t, \
  35                             _lr, _nlr)                          \
  36         {                                                       \
  37                 .name                   = _name,                \
  38                 .id                     = _id,                  \
  39                 .ops                    = &_ops,                \
  40                 .n_voltages             = _n,                   \
  41                 .type                   = REGULATOR_VOLTAGE,    \
  42                 .owner                  = THIS_MODULE,          \
  43                 .vsel_reg               = _vr,                  \
  44                 .vsel_mask              = _vm,                  \
  45                 .enable_reg             = _er,                  \
  46                 .enable_mask            = _em,                  \
  47                 .volt_table             = _t,                   \
  48                 .linear_ranges          = _lr,                  \
  49                 .n_linear_ranges        = _nlr,                 \
  50         }                                                       \
  51
  52 #define TPS65218_INFO(_id, _nm, _min, _max)     \
  53         {                                               \
  54                 .id             = _id,                  \
  55                 .name           = _nm,                  \
  56                 .min_uV         = _min,                 \
  57                 .max_uV         = _max,                 \
  58         }
  59
  60 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
  61         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
  62         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
  63 };
  64
  65 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
  66         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
  67         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
  68 };
  69
  70 static const struct regulator_linear_range dcdc4_ranges[] = {
  71         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
  72         REGULATOR_LINEAR_RANGE(1550000, 0x10, 0x34, 50000),
  73 };
  74
  75 static struct tps_info tps65218_pmic_regs[] = {
  76         TPS65218_INFO(0, "DCDC1", 850000, 167500),
  77         TPS65218_INFO(1, "DCDC2", 850000, 1675000),
  78         TPS65218_INFO(2, "DCDC3", 900000, 3400000),
  79         TPS65218_INFO(3, "DCDC4", 1175000, 3400000),
  80         TPS65218_INFO(4, "DCDC5", 1000000, 1000000),
  81         TPS65218_INFO(5, "DCDC6", 1800000, 1800000),
  82         TPS65218_INFO(6, "LDO1", 900000, 3400000),
  83 };
  84
  85 #define TPS65218_OF_MATCH(comp, label) \
  86         { \
  87                 .compatible = comp, \
  88                 .data = &label, \
  89         }
  90
  91 static const struct of_device_id tps65218_of_match[] = {
  92         TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
  93         TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
  94         TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
  95         TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
  96         TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
  97         TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
  98         TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
  99         { }
 100 };
 101 MODULE_DEVICE_TABLE(of, tps65218_of_match);
 102
 103 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
 104                                          unsigned selector)
 105 {
 106         int ret;
 107         struct tps65218 *tps = rdev_get_drvdata(dev);
 108         unsigned int rid = rdev_get_id(dev);
 109
 110         /* Set the voltage based on vsel value and write protect level is 2 */
 111         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 112                                 selector, TPS65218_PROTECT_L1);
 113
 114         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
 115         switch (rid) {
 116         case TPS65218_DCDC_1:
 117         case TPS65218_DCDC_2:
 118                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
 119                                         TPS65218_SLEW_RATE_GO,
 120                                         TPS65218_SLEW_RATE_GO,
 121                                         TPS65218_PROTECT_L1);
 122                 break;
 123         }
 124
 125         return ret;
 126 }
 127
 128 static int tps65218_pmic_enable(struct regulator_dev *dev)
 129 {
 130         struct tps65218 *tps = rdev_get_drvdata(dev);
 131         unsigned int rid = rdev_get_id(dev);
 132
 133         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 134                 return -EINVAL;
 135
 136         /* Enable the regulator and password protection is level 1 */
 137         return tps65218_set_bits(tps, dev->desc->enable_reg,
 138                                  dev->desc->enable_mask, dev->desc->enable_mask,
 139                                  TPS65218_PROTECT_L1);
 140 }
 141
 142 static int tps65218_pmic_disable(struct regulator_dev *dev)
 143 {
 144         struct tps65218 *tps = rdev_get_drvdata(dev);
 145         unsigned int rid = rdev_get_id(dev);
 146
 147         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 148                 return -EINVAL;
 149
 150         /* Disable the regulator and password protection is level 1 */
 151         return tps65218_clear_bits(tps, dev->desc->enable_reg,
 152                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
 153 }
 154
 155 static int tps65218_set_voltage_time_sel(struct regulator_dev *rdev,
 156         unsigned int old_selector, unsigned int new_selector)
 157 {
 158         int old_uv, new_uv;
 159
 160         old_uv = regulator_list_voltage_linear_range(rdev, old_selector);
 161         if (old_uv < 0)
 162                 return old_uv;
 163
 164         new_uv = regulator_list_voltage_linear_range(rdev, new_selector);
 165         if (new_uv < 0)
 166                 return new_uv;
 167
 168         return DIV_ROUND_UP(abs(old_uv - new_uv), tps65218_ramp_delay);
 169 }
 170
 171 /* Operations permitted on DCDC1, DCDC2 */
 172 static struct regulator_ops tps65218_dcdc12_ops = {
 173         .is_enabled             = regulator_is_enabled_regmap,
 174         .enable                 = tps65218_pmic_enable,
 175         .disable                = tps65218_pmic_disable,
 176         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 177         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 178         .list_voltage           = regulator_list_voltage_linear_range,
 179         .map_voltage            = regulator_map_voltage_linear_range,
 180         .set_voltage_time_sel   = tps65218_set_voltage_time_sel,
 181 };
 182
 183 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
 184 static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
 185         .is_enabled             = regulator_is_enabled_regmap,
 186         .enable                 = tps65218_pmic_enable,
 187         .disable                = tps65218_pmic_disable,
 188         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 189         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 190         .list_voltage           = regulator_list_voltage_linear_range,
 191         .map_voltage            = regulator_map_voltage_linear_range,
 192 };
 193
 194 /* Operations permitted on DCDC5, DCDC6 */
 195 static struct regulator_ops tps65218_dcdc56_pmic_ops = {
 196         .is_enabled             = regulator_is_enabled_regmap,
 197         .enable                 = tps65218_pmic_enable,
 198         .disable                = tps65218_pmic_disable,
 199 };
 200
 201 static const struct regulator_desc regulators[] = {
 202         TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64,
 203                            TPS65218_REG_CONTROL_DCDC1,
 204                            TPS65218_CONTROL_DCDC1_MASK,
 205                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, NULL,
 206                            dcdc1_dcdc2_ranges, 2),
 207         TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64,
 208                            TPS65218_REG_CONTROL_DCDC2,
 209                            TPS65218_CONTROL_DCDC2_MASK,
 210                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, NULL,
 211                            dcdc1_dcdc2_ranges, 2),
 212         TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops,
 213                            64, TPS65218_REG_CONTROL_DCDC3,
 214                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
 215                            TPS65218_ENABLE1_DC3_EN, NULL,
 216                            ldo1_dcdc3_ranges, 2),
 217         TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops,
 218                            53, TPS65218_REG_CONTROL_DCDC4,
 219                            TPS65218_CONTROL_DCDC4_MASK,
 220                            TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN, NULL,
 221                            dcdc4_ranges, 2),
 222         TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops,
 223                            1, -1, -1, TPS65218_REG_ENABLE1,
 224                            TPS65218_ENABLE1_DC5_EN, NULL, NULL, 0),
 225         TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops,
 226                            1, -1, -1, TPS65218_REG_ENABLE1,
 227                            TPS65218_ENABLE1_DC6_EN, NULL, NULL, 0),
 228         TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64,
 229                            TPS65218_REG_CONTROL_DCDC4,
 230                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
 231                            TPS65218_ENABLE2_LDO1_EN, NULL, ldo1_dcdc3_ranges,
 232                            2),
 233 };
 234
 235 static int tps65218_regulator_probe(struct platform_device *pdev)
 236 {
 237         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
 238         struct regulator_init_data *init_data;
 239         const struct tps_info   *template;
 240         struct regulator_dev *rdev;
 241         const struct of_device_id       *match;
 242         struct regulator_config config = { };
 243         int id;
 244
 245         match = of_match_device(tps65218_of_match, &pdev->dev);
 246         if (!match)
 247                 return -ENODEV;
 248
 249         template = match->data;
 250         id = template->id;
 251         init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node);
 252
 253         platform_set_drvdata(pdev, tps);
 254
 255         tps->info[id] = &tps65218_pmic_regs[id];
 256         config.dev = &pdev->dev;
 257         config.init_data = init_data;
 258         config.driver_data = tps;
 259         config.regmap = tps->regmap;
 260
 261         rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
 262         if (IS_ERR(rdev)) {
 263                 dev_err(tps->dev, "failed to register %s regulator\n",
 264                         pdev->name);
 265                 return PTR_ERR(rdev);
 266         }
 267
 268         return 0;
 269 }
 270
 271 static struct platform_driver tps65218_regulator_driver = {
 272         .driver = {
 273                 .name = "tps65218-pmic",
 274                 .owner = THIS_MODULE,
 275                 .of_match_table = tps65218_of_match,
 276         },
 277         .probe = tps65218_regulator_probe,
 278 };
 279
 280 module_platform_driver(tps65218_regulator_driver);
 281
 282 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
 283 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
 284 MODULE_ALIAS("platform:tps65218-pmic");
 285 MODULE_LICENSE("GPL v2");