drivers/regulator/tps65217-regulator.c

   1 /*
   2  * tps65217-regulator.c
   3  *
   4  * Regulator driver for TPS65217 PMIC
   5  *
   6  * Copyright (C) 2011 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 as
  10  * published by the Free Software Foundation version 2.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  13  * kind, whether express or implied; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License 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
  25 #include <linux/regulator/of_regulator.h>
  26 #include <linux/regulator/driver.h>
  27 #include <linux/regulator/machine.h>
  28 #include <linux/mfd/tps65217.h>
  29
  30 #define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
  31                            _t, _lr, _nlr) \
  32         {                                               \
  33                 .name           = _name,                \
  34                 .id             = _id,                  \
  35                 .of_match       = of_match_ptr(_of_match),    \
  36                 .regulators_node= of_match_ptr("regulators"), \
  37                 .ops            = &_ops,                \
  38                 .n_voltages     = _n,                   \
  39                 .type           = REGULATOR_VOLTAGE,    \
  40                 .owner          = THIS_MODULE,          \
  41                 .vsel_reg       = _vr,                  \
  42                 .vsel_mask      = _vm,                  \
  43                 .enable_reg     = TPS65217_REG_ENABLE,  \
  44                 .enable_mask    = _em,                  \
  45                 .volt_table     = _t,                   \
  46                 .linear_ranges  = _lr,                  \
  47                 .n_linear_ranges = _nlr,                \
  48         }                                               \
  49
  50 static const unsigned int LDO1_VSEL_table[] = {
  51         1000000, 1100000, 1200000, 1250000,
  52         1300000, 1350000, 1400000, 1500000,
  53         1600000, 1800000, 2500000, 2750000,
  54         2800000, 3000000, 3100000, 3300000,
  55 };
  56
  57 static const struct regulator_linear_range tps65217_uv1_ranges[] = {
  58         REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
  59         REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
  60         REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
  61         REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
  62         REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
  63 };
  64
  65 static const struct regulator_linear_range tps65217_uv2_ranges[] = {
  66         REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
  67         REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
  68         REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
  69 };
  70
  71 static int tps65217_pmic_enable(struct regulator_dev *dev)
  72 {
  73         struct tps65217 *tps = rdev_get_drvdata(dev);
  74         int rid = rdev_get_id(dev);
  75
  76         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  77                 return -EINVAL;
  78
  79         /* Enable the regulator and password protection is level 1 */
  80         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
  81                                  dev->desc->enable_mask, dev->desc->enable_mask,
  82                                  TPS65217_PROTECT_L1);
  83 }
  84
  85 static int tps65217_pmic_disable(struct regulator_dev *dev)
  86 {
  87         struct tps65217 *tps = rdev_get_drvdata(dev);
  88         int rid = rdev_get_id(dev);
  89
  90         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  91                 return -EINVAL;
  92
  93         /* Disable the regulator and password protection is level 1 */
  94         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
  95                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
  96 }
  97
  98 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
  99                                          unsigned selector)
 100 {
 101         int ret;
 102         struct tps65217 *tps = rdev_get_drvdata(dev);
 103         unsigned int rid = rdev_get_id(dev);
 104
 105         /* Set the voltage based on vsel value and write protect level is 2 */
 106         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 107                                 selector, TPS65217_PROTECT_L2);
 108
 109         /* Set GO bit for DCDCx to initiate voltage transistion */
 110         switch (rid) {
 111         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
 112                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
 113                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
 114                                        TPS65217_PROTECT_L2);
 115                 break;
 116         }
 117
 118         return ret;
 119 }
 120
 121 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
 122 static struct regulator_ops tps65217_pmic_ops = {
 123         .is_enabled             = regulator_is_enabled_regmap,
 124         .enable                 = tps65217_pmic_enable,
 125         .disable                = tps65217_pmic_disable,
 126         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 127         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 128         .list_voltage           = regulator_list_voltage_linear_range,
 129         .map_voltage            = regulator_map_voltage_linear_range,
 130 };
 131
 132 /* Operations permitted on LDO1 */
 133 static struct regulator_ops tps65217_pmic_ldo1_ops = {
 134         .is_enabled             = regulator_is_enabled_regmap,
 135         .enable                 = tps65217_pmic_enable,
 136         .disable                = tps65217_pmic_disable,
 137         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 138         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 139         .list_voltage           = regulator_list_voltage_table,
 140         .map_voltage            = regulator_map_voltage_ascend,
 141 };
 142
 143 static const struct regulator_desc regulators[] = {
 144         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
 145                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
 146                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
 147                            NULL, tps65217_uv1_ranges, 2),
 148         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
 149                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
 150                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
 151                            NULL, tps65217_uv1_ranges,
 152                            ARRAY_SIZE(tps65217_uv1_ranges)),
 153         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
 154                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
 155                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
 156                            NULL, tps65217_uv1_ranges, 1),
 157         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
 158                            tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
 159                            TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
 160                            LDO1_VSEL_table, NULL, 0),
 161         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
 162                            64, TPS65217_REG_DEFLDO2,
 163                            TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
 164                            NULL, tps65217_uv1_ranges,
 165                            ARRAY_SIZE(tps65217_uv1_ranges)),
 166         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
 167                            32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
 168                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
 169                            NULL, tps65217_uv2_ranges,
 170                            ARRAY_SIZE(tps65217_uv2_ranges)),
 171         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
 172                            32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
 173                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
 174                            NULL, tps65217_uv2_ranges,
 175                            ARRAY_SIZE(tps65217_uv2_ranges)),
 176 };
 177
 178 static int tps65217_regulator_probe(struct platform_device *pdev)
 179 {
 180         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
 181         struct tps65217_board *pdata = dev_get_platdata(tps->dev);
 182         struct regulator_dev *rdev;
 183         struct regulator_config config = { };
 184         int i;
 185
 186         if (tps65217_chip_id(tps) != TPS65217) {
 187                 dev_err(&pdev->dev, "Invalid tps chip version\n");
 188                 return -ENODEV;
 189         }
 190
 191         platform_set_drvdata(pdev, tps);
 192
 193         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
 194                 /* Register the regulators */
 195                 config.dev = tps->dev;
 196                 if (pdata)
 197                         config.init_data = pdata->tps65217_init_data[i];
 198                 config.driver_data = tps;
 199                 config.regmap = tps->regmap;
 200
 201                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
 202                                                &config);
 203                 if (IS_ERR(rdev)) {
 204                         dev_err(tps->dev, "failed to register %s regulator\n",
 205                                 pdev->name);
 206                         return PTR_ERR(rdev);
 207                 }
 208         }
 209
 210         return 0;
 211 }
 212
 213 static struct platform_driver tps65217_regulator_driver = {
 214         .driver = {
 215                 .name = "tps65217-pmic",
 216         },
 217         .probe = tps65217_regulator_probe,
 218 };
 219
 220 static int __init tps65217_regulator_init(void)
 221 {
 222         return platform_driver_register(&tps65217_regulator_driver);
 223 }
 224 subsys_initcall(tps65217_regulator_init);
 225
 226 static void __exit tps65217_regulator_exit(void)
 227 {
 228         platform_driver_unregister(&tps65217_regulator_driver);
 229 }
 230 module_exit(tps65217_regulator_exit);
 231
 232 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
 233 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
 234 MODULE_ALIAS("platform:tps65217-pmic");
 235 MODULE_LICENSE("GPL v2");