drivers/regulator/tps65217-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * tps65217-regulator.c
   4  *
   5  * Regulator driver for TPS65217 PMIC
   6  *
   7  * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/device.h>
  13 #include <linux/init.h>
  14 #include <linux/err.h>
  15 #include <linux/platform_device.h>
  16
  17 #include <linux/regulator/of_regulator.h>
  18 #include <linux/regulator/driver.h>
  19 #include <linux/regulator/machine.h>
  20 #include <linux/mfd/tps65217.h>
  21
  22 #define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
  23                            _t, _lr, _nlr,  _sr, _sm)    \
  24         {                                               \
  25                 .name           = _name,                \
  26                 .id             = _id,                  \
  27                 .of_match       = of_match_ptr(_of_match),    \
  28                 .regulators_node= of_match_ptr("regulators"), \
  29                 .ops            = &_ops,                \
  30                 .n_voltages     = _n,                   \
  31                 .type           = REGULATOR_VOLTAGE,    \
  32                 .owner          = THIS_MODULE,          \
  33                 .vsel_reg       = _vr,                  \
  34                 .vsel_mask      = _vm,                  \
  35                 .enable_reg     = TPS65217_REG_ENABLE,  \
  36                 .enable_mask    = _em,                  \
  37                 .volt_table     = _t,                   \
  38                 .linear_ranges  = _lr,                  \
  39                 .n_linear_ranges = _nlr,                \
  40                 .bypass_reg     = _sr,                  \
  41                 .bypass_mask    = _sm,                  \
  42         }                                               \
  43
  44 static const unsigned int LDO1_VSEL_table[] = {
  45         1000000, 1100000, 1200000, 1250000,
  46         1300000, 1350000, 1400000, 1500000,
  47         1600000, 1800000, 2500000, 2750000,
  48         2800000, 3000000, 3100000, 3300000,
  49 };
  50
  51 static const struct linear_range tps65217_uv1_ranges[] = {
  52         REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
  53         REGULATOR_LINEAR_RANGE(1550000, 25, 52, 50000),
  54         REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
  55         REGULATOR_LINEAR_RANGE(3300000, 56, 63, 0),
  56 };
  57
  58 static const struct linear_range tps65217_uv2_ranges[] = {
  59         REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
  60         REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
  61         REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
  62 };
  63
  64 static int tps65217_pmic_enable(struct regulator_dev *dev)
  65 {
  66         struct tps65217 *tps = rdev_get_drvdata(dev);
  67         int rid = rdev_get_id(dev);
  68
  69         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  70                 return -EINVAL;
  71
  72         /* Enable the regulator and password protection is level 1 */
  73         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
  74                                  dev->desc->enable_mask, dev->desc->enable_mask,
  75                                  TPS65217_PROTECT_L1);
  76 }
  77
  78 static int tps65217_pmic_disable(struct regulator_dev *dev)
  79 {
  80         struct tps65217 *tps = rdev_get_drvdata(dev);
  81         int rid = rdev_get_id(dev);
  82
  83         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
  84                 return -EINVAL;
  85
  86         /* Disable the regulator and password protection is level 1 */
  87         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
  88                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
  89 }
  90
  91 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
  92                                          unsigned selector)
  93 {
  94         int ret;
  95         struct tps65217 *tps = rdev_get_drvdata(dev);
  96         unsigned int rid = rdev_get_id(dev);
  97
  98         /* Set the voltage based on vsel value and write protect level is 2 */
  99         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
 100                                 selector, TPS65217_PROTECT_L2);
 101
 102         /* Set GO bit for DCDCx to initiate voltage transistion */
 103         switch (rid) {
 104         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
 105                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
 106                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
 107                                        TPS65217_PROTECT_L2);
 108                 break;
 109         }
 110
 111         return ret;
 112 }
 113
 114 static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
 115 {
 116         struct tps65217 *tps = rdev_get_drvdata(dev);
 117         unsigned int rid = rdev_get_id(dev);
 118
 119         if (rid > TPS65217_LDO_4)
 120                 return -EINVAL;
 121
 122         return tps65217_clear_bits(tps, dev->desc->bypass_reg,
 123                                    dev->desc->bypass_mask,
 124                                    TPS65217_PROTECT_L1);
 125 }
 126
 127 static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
 128 {
 129         struct tps65217 *tps = rdev_get_drvdata(dev);
 130         unsigned int rid = rdev_get_id(dev);
 131
 132         if (rid > TPS65217_LDO_4)
 133                 return -EINVAL;
 134
 135         if (!tps->strobes[rid])
 136                 return -EINVAL;
 137
 138         return tps65217_set_bits(tps, dev->desc->bypass_reg,
 139                                  dev->desc->bypass_mask,
 140                                  tps->strobes[rid], TPS65217_PROTECT_L1);
 141 }
 142
 143 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
 144 static const struct regulator_ops tps65217_pmic_ops = {
 145         .is_enabled             = regulator_is_enabled_regmap,
 146         .enable                 = tps65217_pmic_enable,
 147         .disable                = tps65217_pmic_disable,
 148         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 149         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 150         .list_voltage           = regulator_list_voltage_linear_range,
 151         .map_voltage            = regulator_map_voltage_linear_range,
 152         .set_suspend_enable     = tps65217_pmic_set_suspend_enable,
 153         .set_suspend_disable    = tps65217_pmic_set_suspend_disable,
 154 };
 155
 156 /* Operations permitted on LDO1 */
 157 static const struct regulator_ops tps65217_pmic_ldo1_ops = {
 158         .is_enabled             = regulator_is_enabled_regmap,
 159         .enable                 = tps65217_pmic_enable,
 160         .disable                = tps65217_pmic_disable,
 161         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 162         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
 163         .list_voltage           = regulator_list_voltage_table,
 164         .map_voltage            = regulator_map_voltage_ascend,
 165         .set_suspend_enable     = tps65217_pmic_set_suspend_enable,
 166         .set_suspend_disable    = tps65217_pmic_set_suspend_disable,
 167 };
 168
 169 static const struct regulator_desc regulators[] = {
 170         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
 171                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
 172                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
 173                            NULL, tps65217_uv1_ranges,
 174                            ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
 175                            TPS65217_SEQ1_DC1_SEQ_MASK),
 176         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
 177                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
 178                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
 179                            NULL, tps65217_uv1_ranges,
 180                            ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
 181                            TPS65217_SEQ1_DC2_SEQ_MASK),
 182         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
 183                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
 184                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
 185                            NULL, tps65217_uv1_ranges,
 186                            ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2,
 187                            TPS65217_SEQ2_DC3_SEQ_MASK),
 188         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
 189                            tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
 190                            TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
 191                            LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
 192                            TPS65217_SEQ2_LDO1_SEQ_MASK),
 193         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
 194                            64, TPS65217_REG_DEFLDO2,
 195                            TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
 196                            NULL, tps65217_uv1_ranges,
 197                            ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
 198                            TPS65217_SEQ3_LDO2_SEQ_MASK),
 199         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
 200                            32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
 201                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
 202                            NULL, tps65217_uv2_ranges,
 203                            ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
 204                            TPS65217_SEQ3_LDO3_SEQ_MASK),
 205         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
 206                            32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
 207                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
 208                            NULL, tps65217_uv2_ranges,
 209                            ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
 210                            TPS65217_SEQ4_LDO4_SEQ_MASK),
 211 };
 212
 213 static int tps65217_regulator_probe(struct platform_device *pdev)
 214 {
 215         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
 216         struct tps65217_board *pdata = dev_get_platdata(tps->dev);
 217         struct regulator_dev *rdev;
 218         struct regulator_config config = { };
 219         int i, ret;
 220         unsigned int val;
 221
 222         /* Allocate memory for strobes */
 223         tps->strobes = devm_kcalloc(&pdev->dev,
 224                                     TPS65217_NUM_REGULATOR, sizeof(u8),
 225                                     GFP_KERNEL);
 226         if (!tps->strobes)
 227                 return -ENOMEM;
 228
 229         platform_set_drvdata(pdev, tps);
 230
 231         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
 232                 /* Register the regulators */
 233                 config.dev = tps->dev;
 234                 if (pdata)
 235                         config.init_data = pdata->tps65217_init_data[i];
 236                 config.driver_data = tps;
 237                 config.regmap = tps->regmap;
 238
 239                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
 240                                                &config);
 241                 if (IS_ERR(rdev)) {
 242                         dev_err(tps->dev, "failed to register %s regulator\n",
 243                                 pdev->name);
 244                         return PTR_ERR(rdev);
 245                 }
 246
 247                 /* Store default strobe info */
 248                 ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
 249                 if (ret)
 250                         return ret;
 251
 252                 tps->strobes[i] = val & regulators[i].bypass_mask;
 253         }
 254
 255         return 0;
 256 }
 257
 258 static struct platform_driver tps65217_regulator_driver = {
 259         .driver = {
 260                 .name = "tps65217-pmic",
 261                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 262         },
 263         .probe = tps65217_regulator_probe,
 264 };
 265
 266 static int __init tps65217_regulator_init(void)
 267 {
 268         return platform_driver_register(&tps65217_regulator_driver);
 269 }
 270 subsys_initcall(tps65217_regulator_init);
 271
 272 static void __exit tps65217_regulator_exit(void)
 273 {
 274         platform_driver_unregister(&tps65217_regulator_driver);
 275 }
 276 module_exit(tps65217_regulator_exit);
 277
 278 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
 279 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
 280 MODULE_ALIAS("platform:tps65217-pmic");
 281 MODULE_LICENSE("GPL v2");