drivers/regulator/tps65218-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * tps65218-regulator.c
   4  *
   5  * Regulator driver for TPS65218 PMIC
   6  *
   7  * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/mod_devicetable.h>
  12 #include <linux/module.h>
  13 #include <linux/device.h>
  14 #include <linux/init.h>
  15 #include <linux/err.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/regmap.h>
  18 #include <linux/regulator/of_regulator.h>
  19 #include <linux/regulator/driver.h>
  20 #include <linux/regulator/machine.h>
  21 #include <linux/mfd/tps65218.h>
  22
  23 #define TPS65218_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \
  24                            _em, _cr, _cm, _lr, _nlr, _delay, _fuv, _sr, _sm, \
  25                            _ct, _ncl) \
  26         {                                                       \
  27                 .name                   = _name,                \
  28                 .of_match               = _of,                  \
  29                 .id                     = _id,                  \
  30                 .ops                    = &_ops,                \
  31                 .n_voltages             = _n,                   \
  32                 .type                   = _type,        \
  33                 .owner                  = THIS_MODULE,          \
  34                 .vsel_reg               = _vr,                  \
  35                 .vsel_mask              = _vm,                  \
  36                 .csel_reg               = _cr,                  \
  37                 .csel_mask              = _cm,                  \
  38                 .curr_table             = _ct,                  \
  39                 .n_current_limits       = _ncl,                 \
  40                 .enable_reg             = _er,                  \
  41                 .enable_mask            = _em,                  \
  42                 .volt_table             = NULL,                 \
  43                 .linear_ranges          = _lr,                  \
  44                 .n_linear_ranges        = _nlr,                 \
  45                 .ramp_delay             = _delay,               \
  46                 .fixed_uV               = _fuv,                 \
  47                 .bypass_reg     = _sr,                          \
  48                 .bypass_mask    = _sm,                          \
  49         }                                                       \
  50
  51 static const struct linear_range dcdc1_dcdc2_ranges[] = {
  52         REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
  53         REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
  54 };
  55
  56 static const struct linear_range ldo1_dcdc3_ranges[] = {
  57         REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
  58         REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
  59 };
  60
  61 static const struct linear_range dcdc4_ranges[] = {
  62         REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
  63         REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
  64 };
  65
  66 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
  67                                          unsigned selector)
  68 {
  69         int ret;
  70         struct tps65218 *tps = rdev_get_drvdata(dev);
  71         unsigned int rid = rdev_get_id(dev);
  72
  73         /* Set the voltage based on vsel value and write protect level is 2 */
  74         ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
  75                                 selector, TPS65218_PROTECT_L1);
  76
  77         /* Set GO bit for DCDC1/2 to initiate voltage transistion */
  78         switch (rid) {
  79         case TPS65218_DCDC_1:
  80         case TPS65218_DCDC_2:
  81                 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
  82                                         TPS65218_SLEW_RATE_GO,
  83                                         TPS65218_SLEW_RATE_GO,
  84                                         TPS65218_PROTECT_L1);
  85                 break;
  86         }
  87
  88         return ret;
  89 }
  90
  91 static int tps65218_pmic_enable(struct regulator_dev *dev)
  92 {
  93         struct tps65218 *tps = rdev_get_drvdata(dev);
  94         int rid = rdev_get_id(dev);
  95
  96         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
  97                 return -EINVAL;
  98
  99         /* Enable the regulator and password protection is level 1 */
 100         return tps65218_set_bits(tps, dev->desc->enable_reg,
 101                                  dev->desc->enable_mask, dev->desc->enable_mask,
 102                                  TPS65218_PROTECT_L1);
 103 }
 104
 105 static int tps65218_pmic_disable(struct regulator_dev *dev)
 106 {
 107         struct tps65218 *tps = rdev_get_drvdata(dev);
 108         int rid = rdev_get_id(dev);
 109
 110         if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
 111                 return -EINVAL;
 112
 113         /* Disable the regulator and password protection is level 1 */
 114         return tps65218_clear_bits(tps, dev->desc->enable_reg,
 115                                    dev->desc->enable_mask, TPS65218_PROTECT_L1);
 116 }
 117
 118 static int tps65218_pmic_set_suspend_enable(struct regulator_dev *dev)
 119 {
 120         struct tps65218 *tps = rdev_get_drvdata(dev);
 121         unsigned int rid = rdev_get_id(dev);
 122
 123         if (rid > TPS65218_LDO_1)
 124                 return -EINVAL;
 125
 126         return tps65218_clear_bits(tps, dev->desc->bypass_reg,
 127                                    dev->desc->bypass_mask,
 128                                    TPS65218_PROTECT_L1);
 129 }
 130
 131 static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev)
 132 {
 133         struct tps65218 *tps = rdev_get_drvdata(dev);
 134         unsigned int rid = rdev_get_id(dev);
 135
 136         if (rid > TPS65218_LDO_1)
 137                 return -EINVAL;
 138
 139         /*
 140          * Certain revisions of TPS65218 will need to have DCDC3 regulator
 141          * enabled always, otherwise an immediate system reboot will occur
 142          * during poweroff.
 143          */
 144         if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1)
 145                 return 0;
 146
 147         if (!tps->strobes[rid]) {
 148                 if (rid == TPS65218_DCDC_3)
 149                         tps->strobes[rid] = 3;
 150                 else
 151                         return -EINVAL;
 152         }
 153
 154         return tps65218_set_bits(tps, dev->desc->bypass_reg,
 155                                  dev->desc->bypass_mask,
 156                                  tps->strobes[rid], TPS65218_PROTECT_L1);
 157 }
 158
 159 /* Operations permitted on DCDC1, DCDC2 */
 160 static const struct regulator_ops tps65218_dcdc12_ops = {
 161         .is_enabled             = regulator_is_enabled_regmap,
 162         .enable                 = tps65218_pmic_enable,
 163         .disable                = tps65218_pmic_disable,
 164         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 165         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 166         .list_voltage           = regulator_list_voltage_linear_range,
 167         .map_voltage            = regulator_map_voltage_linear_range,
 168         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 169         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
 170         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
 171 };
 172
 173 /* Operations permitted on DCDC3, DCDC4 and LDO1 */
 174 static const struct regulator_ops tps65218_ldo1_dcdc34_ops = {
 175         .is_enabled             = regulator_is_enabled_regmap,
 176         .enable                 = tps65218_pmic_enable,
 177         .disable                = tps65218_pmic_disable,
 178         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 179         .set_voltage_sel        = tps65218_pmic_set_voltage_sel,
 180         .list_voltage           = regulator_list_voltage_linear_range,
 181         .map_voltage            = regulator_map_voltage_linear_range,
 182         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
 183         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
 184 };
 185
 186 static const unsigned int ls3_currents[] = { 100000, 200000, 500000, 1000000 };
 187
 188 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
 189                                                int lim_uA)
 190 {
 191         unsigned int index = 0;
 192         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
 193         struct tps65218 *tps = rdev_get_drvdata(dev);
 194
 195         while (index < num_currents && ls3_currents[index] != lim_uA)
 196                 index++;
 197
 198         if (index == num_currents)
 199                 return -EINVAL;
 200
 201         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
 202                                  index << __builtin_ctz(dev->desc->csel_mask),
 203                                  TPS65218_PROTECT_L1);
 204 }
 205
 206 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
 207                                            int min_uA, int max_uA)
 208 {
 209         int index = 0;
 210         unsigned int num_currents = ARRAY_SIZE(ls3_currents);
 211         struct tps65218 *tps = rdev_get_drvdata(dev);
 212
 213         while (index < num_currents && ls3_currents[index] <= max_uA)
 214                 index++;
 215
 216         index--;
 217
 218         if (index < 0 || ls3_currents[index] < min_uA)
 219                 return -EINVAL;
 220
 221         return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
 222                                  index << __builtin_ctz(dev->desc->csel_mask),
 223                                  TPS65218_PROTECT_L1);
 224 }
 225
 226 static const struct regulator_ops tps65218_ls23_ops = {
 227         .is_enabled             = regulator_is_enabled_regmap,
 228         .enable                 = tps65218_pmic_enable,
 229         .disable                = tps65218_pmic_disable,
 230         .set_input_current_limit = tps65218_pmic_set_input_current_lim,
 231         .set_current_limit      = tps65218_pmic_set_current_limit,
 232         .get_current_limit      = regulator_get_current_limit_regmap,
 233 };
 234
 235 /* Operations permitted on DCDC5, DCDC6 */
 236 static const struct regulator_ops tps65218_dcdc56_pmic_ops = {
 237         .is_enabled             = regulator_is_enabled_regmap,
 238         .enable                 = tps65218_pmic_enable,
 239         .disable                = tps65218_pmic_disable,
 240         .set_suspend_enable     = tps65218_pmic_set_suspend_enable,
 241         .set_suspend_disable    = tps65218_pmic_set_suspend_disable,
 242 };
 243
 244 static const struct regulator_desc regulators[] = {
 245         TPS65218_REGULATOR("DCDC1", "regulator-dcdc1", TPS65218_DCDC_1,
 246                            REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,
 247                            TPS65218_REG_CONTROL_DCDC1,
 248                            TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
 249                            TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
 250                            2, 4000, 0, TPS65218_REG_SEQ3,
 251                            TPS65218_SEQ3_DC1_SEQ_MASK, NULL, 0),
 252         TPS65218_REGULATOR("DCDC2", "regulator-dcdc2", TPS65218_DCDC_2,
 253                            REGULATOR_VOLTAGE, tps65218_dcdc12_ops, 64,
 254                            TPS65218_REG_CONTROL_DCDC2,
 255                            TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
 256                            TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
 257                            2, 4000, 0, TPS65218_REG_SEQ3,
 258                            TPS65218_SEQ3_DC2_SEQ_MASK, NULL, 0),
 259         TPS65218_REGULATOR("DCDC3", "regulator-dcdc3", TPS65218_DCDC_3,
 260                            REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,
 261                            TPS65218_REG_CONTROL_DCDC3,
 262                            TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
 263                            TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
 264                            0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC3_SEQ_MASK,
 265                            NULL, 0),
 266         TPS65218_REGULATOR("DCDC4", "regulator-dcdc4", TPS65218_DCDC_4,
 267                            REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 53,
 268                            TPS65218_REG_CONTROL_DCDC4,
 269                            TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
 270                            TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
 271                            0, 0, TPS65218_REG_SEQ4, TPS65218_SEQ4_DC4_SEQ_MASK,
 272                            NULL, 0),
 273         TPS65218_REGULATOR("DCDC5", "regulator-dcdc5", TPS65218_DCDC_5,
 274                            REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1,
 275                            -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0,
 276                            0, NULL, 0, 0, 1000000, TPS65218_REG_SEQ5,
 277                            TPS65218_SEQ5_DC5_SEQ_MASK, NULL, 0),
 278         TPS65218_REGULATOR("DCDC6", "regulator-dcdc6", TPS65218_DCDC_6,
 279                            REGULATOR_VOLTAGE, tps65218_dcdc56_pmic_ops, 1, -1,
 280                            -1, TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0,
 281                            0, NULL, 0, 0, 1800000, TPS65218_REG_SEQ5,
 282                            TPS65218_SEQ5_DC6_SEQ_MASK, NULL, 0),
 283         TPS65218_REGULATOR("LDO1", "regulator-ldo1", TPS65218_LDO_1,
 284                            REGULATOR_VOLTAGE, tps65218_ldo1_dcdc34_ops, 64,
 285                            TPS65218_REG_CONTROL_LDO1,
 286                            TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
 287                            TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
 288                            2, 0, 0, TPS65218_REG_SEQ6,
 289                            TPS65218_SEQ6_LDO1_SEQ_MASK, NULL, 0),
 290         TPS65218_REGULATOR("LS2", "regulator-ls2", TPS65218_LS_2,
 291                            REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0,
 292                            TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS2_EN,
 293                            TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS2ILIM_MASK,
 294                            NULL, 0, 0, 0, 0, 0, ls3_currents,
 295                            ARRAY_SIZE(ls3_currents)),
 296         TPS65218_REGULATOR("LS3", "regulator-ls3", TPS65218_LS_3,
 297                            REGULATOR_CURRENT, tps65218_ls23_ops, 0, 0, 0,
 298                            TPS65218_REG_ENABLE2, TPS65218_ENABLE2_LS3_EN,
 299                            TPS65218_REG_CONFIG2, TPS65218_CONFIG2_LS3ILIM_MASK,
 300                            NULL, 0, 0, 0, 0, 0, ls3_currents,
 301                            ARRAY_SIZE(ls3_currents)),
 302 };
 303
 304 static int tps65218_regulator_probe(struct platform_device *pdev)
 305 {
 306         struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
 307         struct regulator_dev *rdev;
 308         struct regulator_config config = { };
 309         int i, ret;
 310         unsigned int val;
 311
 312         config.dev = &pdev->dev;
 313         config.dev->of_node = tps->dev->of_node;
 314         config.driver_data = tps;
 315         config.regmap = tps->regmap;
 316
 317         /* Allocate memory for strobes */
 318         tps->strobes = devm_kcalloc(&pdev->dev,
 319                                     TPS65218_NUM_REGULATOR, sizeof(u8),
 320                                     GFP_KERNEL);
 321         if (!tps->strobes)
 322                 return -ENOMEM;
 323
 324         for (i = 0; i < ARRAY_SIZE(regulators); i++) {
 325                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
 326                                                &config);
 327                 if (IS_ERR(rdev)) {
 328                         dev_err(tps->dev, "failed to register %s regulator\n",
 329                                 pdev->name);
 330                         return PTR_ERR(rdev);
 331                 }
 332
 333                 ret = regmap_read(tps->regmap, regulators[i].bypass_reg, &val);
 334                 if (ret)
 335                         return ret;
 336
 337                 tps->strobes[i] = val & regulators[i].bypass_mask;
 338         }
 339
 340         return 0;
 341 }
 342
 343 static const struct platform_device_id tps65218_regulator_id_table[] = {
 344         { "tps65218-regulator", },
 345         { /* sentinel */ }
 346 };
 347 MODULE_DEVICE_TABLE(platform, tps65218_regulator_id_table);
 348
 349 static struct platform_driver tps65218_regulator_driver = {
 350         .driver = {
 351                 .name = "tps65218-pmic",
 352                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 353         },
 354         .probe = tps65218_regulator_probe,
 355         .id_table = tps65218_regulator_id_table,
 356 };
 357
 358 module_platform_driver(tps65218_regulator_driver);
 359
 360 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
 361 MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
 362 MODULE_ALIAS("platform:tps65218-pmic");
 363 MODULE_LICENSE("GPL v2");