drivers/regulator/mt6397-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2014 MediaTek Inc.
   4 // Author: Flora Fu <flora.fu@mediatek.com>
   5
   6 #include <linux/module.h>
   7 #include <linux/of.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/regmap.h>
  10 #include <linux/mfd/mt6397/core.h>
  11 #include <linux/mfd/mt6397/registers.h>
  12 #include <linux/regulator/driver.h>
  13 #include <linux/regulator/machine.h>
  14 #include <linux/regulator/mt6397-regulator.h>
  15 #include <linux/regulator/of_regulator.h>
  16 #include <dt-bindings/regulator/mediatek,mt6397-regulator.h>
  17
  18 /*
  19  * MT6397 regulators' information
  20  *
  21  * @desc: standard fields of regulator description.
  22  * @qi: Mask for query enable signal status of regulators
  23  * @vselon_reg: Register sections for hardware control mode of bucks
  24  * @vselctrl_reg: Register for controlling the buck control mode.
  25  * @vselctrl_mask: Mask for query buck's voltage control mode.
  26  */
  27 struct mt6397_regulator_info {
  28         struct regulator_desc desc;
  29         u32 qi;
  30         u32 vselon_reg;
  31         u32 vselctrl_reg;
  32         u32 vselctrl_mask;
  33         u32 modeset_reg;
  34         u32 modeset_mask;
  35         u32 modeset_shift;
  36 };
  37
  38 #define MT6397_BUCK(match, vreg, min, max, step, volt_ranges, enreg,    \
  39                 vosel, vosel_mask, voselon, vosel_ctrl, _modeset_reg,   \
  40                 _modeset_shift)                                 \
  41 [MT6397_ID_##vreg] = {                                                  \
  42         .desc = {                                                       \
  43                 .name = #vreg,                                          \
  44                 .of_match = of_match_ptr(match),                        \
  45                 .ops = &mt6397_volt_range_ops,                          \
  46                 .type = REGULATOR_VOLTAGE,                              \
  47                 .id = MT6397_ID_##vreg,                                 \
  48                 .owner = THIS_MODULE,                                   \
  49                 .n_voltages = (max - min)/step + 1,                     \
  50                 .linear_ranges = volt_ranges,                           \
  51                 .n_linear_ranges = ARRAY_SIZE(volt_ranges),             \
  52                 .vsel_reg = vosel,                                      \
  53                 .vsel_mask = vosel_mask,                                \
  54                 .enable_reg = enreg,                                    \
  55                 .enable_mask = BIT(0),                                  \
  56                 .of_map_mode = mt6397_map_mode,                         \
  57         },                                                              \
  58         .qi = BIT(13),                                                  \
  59         .vselon_reg = voselon,                                          \
  60         .vselctrl_reg = vosel_ctrl,                                     \
  61         .vselctrl_mask = BIT(1),                                        \
  62         .modeset_reg = _modeset_reg,                                    \
  63         .modeset_mask = BIT(_modeset_shift),                            \
  64         .modeset_shift = _modeset_shift                                 \
  65 }
  66
  67 #define MT6397_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel,    \
  68                 vosel_mask)                                             \
  69 [MT6397_ID_##vreg] = {                                                  \
  70         .desc = {                                                       \
  71                 .name = #vreg,                                          \
  72                 .of_match = of_match_ptr(match),                        \
  73                 .ops = &mt6397_volt_table_ops,                          \
  74                 .type = REGULATOR_VOLTAGE,                              \
  75                 .id = MT6397_ID_##vreg,                                 \
  76                 .owner = THIS_MODULE,                                   \
  77                 .n_voltages = ARRAY_SIZE(ldo_volt_table),               \
  78                 .volt_table = ldo_volt_table,                           \
  79                 .vsel_reg = vosel,                                      \
  80                 .vsel_mask = vosel_mask,                                \
  81                 .enable_reg = enreg,                                    \
  82                 .enable_mask = BIT(enbit),                              \
  83         },                                                              \
  84         .qi = BIT(15),                                                  \
  85 }
  86
  87 #define MT6397_REG_FIXED(match, vreg, enreg, enbit, volt)               \
  88 [MT6397_ID_##vreg] = {                                                  \
  89         .desc = {                                                       \
  90                 .name = #vreg,                                          \
  91                 .of_match = of_match_ptr(match),                        \
  92                 .ops = &mt6397_volt_fixed_ops,                          \
  93                 .type = REGULATOR_VOLTAGE,                              \
  94                 .id = MT6397_ID_##vreg,                                 \
  95                 .owner = THIS_MODULE,                                   \
  96                 .n_voltages = 1,                                        \
  97                 .enable_reg = enreg,                                    \
  98                 .enable_mask = BIT(enbit),                              \
  99                 .min_uV = volt,                                         \
 100         },                                                              \
 101         .qi = BIT(15),                                                  \
 102 }
 103
 104 static const struct linear_range buck_volt_range1[] = {
 105         REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),
 106 };
 107
 108 static const struct linear_range buck_volt_range2[] = {
 109         REGULATOR_LINEAR_RANGE(800000, 0, 0x7f, 6250),
 110 };
 111
 112 static const struct linear_range buck_volt_range3[] = {
 113         REGULATOR_LINEAR_RANGE(1500000, 0, 0x1f, 20000),
 114 };
 115
 116 static const unsigned int ldo_volt_table1[] = {
 117         1500000, 1800000, 2500000, 2800000,
 118 };
 119
 120 static const unsigned int ldo_volt_table2[] = {
 121         1800000, 3300000,
 122 };
 123
 124 static const unsigned int ldo_volt_table3[] = {
 125         3000000, 3300000,
 126 };
 127
 128 static const unsigned int ldo_volt_table4[] = {
 129         1220000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
 130 };
 131
 132 static const unsigned int ldo_volt_table5[] = {
 133         1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
 134 };
 135
 136 static const unsigned int ldo_volt_table5_v2[] = {
 137         1200000, 1000000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
 138 };
 139
 140 static const unsigned int ldo_volt_table6[] = {
 141         1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,
 142 };
 143
 144 static const unsigned int ldo_volt_table7[] = {
 145         1300000, 1500000, 1800000, 2000000, 2500000, 2800000, 3000000, 3300000,
 146 };
 147
 148 static unsigned int mt6397_map_mode(unsigned int mode)
 149 {
 150         switch (mode) {
 151         case MT6397_BUCK_MODE_AUTO:
 152                 return REGULATOR_MODE_NORMAL;
 153         case MT6397_BUCK_MODE_FORCE_PWM:
 154                 return REGULATOR_MODE_FAST;
 155         default:
 156                 return REGULATOR_MODE_INVALID;
 157         }
 158 }
 159
 160 static int mt6397_regulator_set_mode(struct regulator_dev *rdev,
 161                                      unsigned int mode)
 162 {
 163         struct mt6397_regulator_info *info = rdev_get_drvdata(rdev);
 164         int ret, val;
 165
 166         switch (mode) {
 167         case REGULATOR_MODE_FAST:
 168                 val = MT6397_BUCK_MODE_FORCE_PWM;
 169                 break;
 170         case REGULATOR_MODE_NORMAL:
 171                 val = MT6397_BUCK_MODE_AUTO;
 172                 break;
 173         default:
 174                 ret = -EINVAL;
 175                 goto err_mode;
 176         }
 177
 178         dev_dbg(&rdev->dev, "mt6397 buck set_mode %#x, %#x, %#x, %#x\n",
 179                 info->modeset_reg, info->modeset_mask,
 180                 info->modeset_shift, val);
 181
 182         val <<= info->modeset_shift;
 183         ret = regmap_update_bits(rdev->regmap, info->modeset_reg,
 184                                  info->modeset_mask, val);
 185 err_mode:
 186         if (ret != 0) {
 187                 dev_err(&rdev->dev,
 188                         "Failed to set mt6397 buck mode: %d\n", ret);
 189                 return ret;
 190         }
 191
 192         return 0;
 193 }
 194
 195 static unsigned int mt6397_regulator_get_mode(struct regulator_dev *rdev)
 196 {
 197         struct mt6397_regulator_info *info = rdev_get_drvdata(rdev);
 198         int ret, regval;
 199
 200         ret = regmap_read(rdev->regmap, info->modeset_reg, &regval);
 201         if (ret != 0) {
 202                 dev_err(&rdev->dev,
 203                         "Failed to get mt6397 buck mode: %d\n", ret);
 204                 return ret;
 205         }
 206
 207         switch ((regval & info->modeset_mask) >> info->modeset_shift) {
 208         case MT6397_BUCK_MODE_AUTO:
 209                 return REGULATOR_MODE_NORMAL;
 210         case MT6397_BUCK_MODE_FORCE_PWM:
 211                 return REGULATOR_MODE_FAST;
 212         default:
 213                 return -EINVAL;
 214         }
 215 }
 216
 217 static int mt6397_get_status(struct regulator_dev *rdev)
 218 {
 219         int ret;
 220         u32 regval;
 221         struct mt6397_regulator_info *info = rdev_get_drvdata(rdev);
 222
 223         ret = regmap_read(rdev->regmap, info->desc.enable_reg, &regval);
 224         if (ret != 0) {
 225                 dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);
 226                 return ret;
 227         }
 228
 229         return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
 230 }
 231
 232 static const struct regulator_ops mt6397_volt_range_ops = {
 233         .list_voltage = regulator_list_voltage_linear_range,
 234         .map_voltage = regulator_map_voltage_linear_range,
 235         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 236         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 237         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 238         .enable = regulator_enable_regmap,
 239         .disable = regulator_disable_regmap,
 240         .is_enabled = regulator_is_enabled_regmap,
 241         .get_status = mt6397_get_status,
 242         .set_mode = mt6397_regulator_set_mode,
 243         .get_mode = mt6397_regulator_get_mode,
 244 };
 245
 246 static const struct regulator_ops mt6397_volt_table_ops = {
 247         .list_voltage = regulator_list_voltage_table,
 248         .map_voltage = regulator_map_voltage_iterate,
 249         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 250         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 251         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 252         .enable = regulator_enable_regmap,
 253         .disable = regulator_disable_regmap,
 254         .is_enabled = regulator_is_enabled_regmap,
 255         .get_status = mt6397_get_status,
 256 };
 257
 258 static const struct regulator_ops mt6397_volt_fixed_ops = {
 259         .list_voltage = regulator_list_voltage_linear,
 260         .enable = regulator_enable_regmap,
 261         .disable = regulator_disable_regmap,
 262         .is_enabled = regulator_is_enabled_regmap,
 263         .get_status = mt6397_get_status,
 264 };
 265
 266 /* The array is indexed by id(MT6397_ID_XXX) */
 267 static struct mt6397_regulator_info mt6397_regulators[] = {
 268         MT6397_BUCK("buck_vpca15", VPCA15, 700000, 1493750, 6250,
 269                 buck_volt_range1, MT6397_VCA15_CON7, MT6397_VCA15_CON9, 0x7f,
 270                 MT6397_VCA15_CON10, MT6397_VCA15_CON5, MT6397_VCA15_CON2, 11),
 271         MT6397_BUCK("buck_vpca7", VPCA7, 700000, 1493750, 6250,
 272                 buck_volt_range1, MT6397_VPCA7_CON7, MT6397_VPCA7_CON9, 0x7f,
 273                 MT6397_VPCA7_CON10, MT6397_VPCA7_CON5, MT6397_VPCA7_CON2, 8),
 274         MT6397_BUCK("buck_vsramca15", VSRAMCA15, 700000, 1493750, 6250,
 275                 buck_volt_range1, MT6397_VSRMCA15_CON7, MT6397_VSRMCA15_CON9,
 276                 0x7f, MT6397_VSRMCA15_CON10, MT6397_VSRMCA15_CON5,
 277                 MT6397_VSRMCA15_CON2, 8),
 278         MT6397_BUCK("buck_vsramca7", VSRAMCA7, 700000, 1493750, 6250,
 279                 buck_volt_range1, MT6397_VSRMCA7_CON7, MT6397_VSRMCA7_CON9,
 280                 0x7f, MT6397_VSRMCA7_CON10, MT6397_VSRMCA7_CON5,
 281                 MT6397_VSRMCA7_CON2, 8),
 282         MT6397_BUCK("buck_vcore", VCORE, 700000, 1493750, 6250,
 283                 buck_volt_range1, MT6397_VCORE_CON7, MT6397_VCORE_CON9, 0x7f,
 284                 MT6397_VCORE_CON10, MT6397_VCORE_CON5, MT6397_VCORE_CON2, 8),
 285         MT6397_BUCK("buck_vgpu", VGPU, 700000, 1493750, 6250, buck_volt_range1,
 286                 MT6397_VGPU_CON7, MT6397_VGPU_CON9, 0x7f,
 287                 MT6397_VGPU_CON10, MT6397_VGPU_CON5, MT6397_VGPU_CON2, 8),
 288         MT6397_BUCK("buck_vdrm", VDRM, 800000, 1593750, 6250, buck_volt_range2,
 289                 MT6397_VDRM_CON7, MT6397_VDRM_CON9, 0x7f,
 290                 MT6397_VDRM_CON10, MT6397_VDRM_CON5, MT6397_VDRM_CON2, 8),
 291         MT6397_BUCK("buck_vio18", VIO18, 1500000, 2120000, 20000,
 292                 buck_volt_range3, MT6397_VIO18_CON7, MT6397_VIO18_CON9, 0x1f,
 293                 MT6397_VIO18_CON10, MT6397_VIO18_CON5, MT6397_VIO18_CON2, 8),
 294         MT6397_REG_FIXED("ldo_vtcxo", VTCXO, MT6397_ANALDO_CON0, 10, 2800000),
 295         MT6397_REG_FIXED("ldo_va28", VA28, MT6397_ANALDO_CON1, 14, 2800000),
 296         MT6397_LDO("ldo_vcama", VCAMA, ldo_volt_table1,
 297                 MT6397_ANALDO_CON2, 15, MT6397_ANALDO_CON6, 0xC0),
 298         MT6397_REG_FIXED("ldo_vio28", VIO28, MT6397_DIGLDO_CON0, 14, 2800000),
 299         MT6397_REG_FIXED("ldo_vusb", VUSB, MT6397_DIGLDO_CON1, 14, 3300000),
 300         MT6397_LDO("ldo_vmc", VMC, ldo_volt_table2,
 301                 MT6397_DIGLDO_CON2, 12, MT6397_DIGLDO_CON29, 0x10),
 302         MT6397_LDO("ldo_vmch", VMCH, ldo_volt_table3,
 303                 MT6397_DIGLDO_CON3, 14, MT6397_DIGLDO_CON17, 0x80),
 304         MT6397_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table3,
 305                 MT6397_DIGLDO_CON4, 14, MT6397_DIGLDO_CON18, 0x10),
 306         MT6397_LDO("ldo_vgp1", VGP1, ldo_volt_table4,
 307                 MT6397_DIGLDO_CON5, 15, MT6397_DIGLDO_CON19, 0xE0),
 308         MT6397_LDO("ldo_vgp2", VGP2, ldo_volt_table5,
 309                 MT6397_DIGLDO_CON6, 15, MT6397_DIGLDO_CON20, 0xE0),
 310         MT6397_LDO("ldo_vgp3", VGP3, ldo_volt_table5,
 311                 MT6397_DIGLDO_CON7, 15, MT6397_DIGLDO_CON21, 0xE0),
 312         MT6397_LDO("ldo_vgp4", VGP4, ldo_volt_table5,
 313                 MT6397_DIGLDO_CON8, 15, MT6397_DIGLDO_CON22, 0xE0),
 314         MT6397_LDO("ldo_vgp5", VGP5, ldo_volt_table6,
 315                 MT6397_DIGLDO_CON9, 15, MT6397_DIGLDO_CON23, 0xE0),
 316         MT6397_LDO("ldo_vgp6", VGP6, ldo_volt_table5,
 317                 MT6397_DIGLDO_CON10, 15, MT6397_DIGLDO_CON33, 0xE0),
 318         MT6397_LDO("ldo_vibr", VIBR, ldo_volt_table7,
 319                 MT6397_DIGLDO_CON24, 15, MT6397_DIGLDO_CON25, 0xE00),
 320 };
 321
 322 static int mt6397_set_buck_vosel_reg(struct platform_device *pdev)
 323 {
 324         struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent);
 325         int i;
 326         u32 regval;
 327
 328         for (i = 0; i < MT6397_MAX_REGULATOR; i++) {
 329                 if (mt6397_regulators[i].vselctrl_reg) {
 330                         if (regmap_read(mt6397->regmap,
 331                                 mt6397_regulators[i].vselctrl_reg,
 332                                 &regval) < 0) {
 333                                 dev_err(&pdev->dev,
 334                                         "Failed to read buck ctrl\n");
 335                                 return -EIO;
 336                         }
 337
 338                         if (regval & mt6397_regulators[i].vselctrl_mask) {
 339                                 mt6397_regulators[i].desc.vsel_reg =
 340                                 mt6397_regulators[i].vselon_reg;
 341                         }
 342                 }
 343         }
 344
 345         return 0;
 346 }
 347
 348 static int mt6397_regulator_probe(struct platform_device *pdev)
 349 {
 350         struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent);
 351         struct regulator_config config = {};
 352         struct regulator_dev *rdev;
 353         int i;
 354         u32 reg_value, version;
 355
 356         /* Query buck controller to select activated voltage register part */
 357         if (mt6397_set_buck_vosel_reg(pdev))
 358                 return -EIO;
 359
 360         /* Read PMIC chip revision to update constraints and voltage table */
 361         if (regmap_read(mt6397->regmap, MT6397_CID, &reg_value) < 0) {
 362                 dev_err(&pdev->dev, "Failed to read Chip ID\n");
 363                 return -EIO;
 364         }
 365         dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value);
 366
 367         version = (reg_value & 0xFF);
 368         switch (version) {
 369         case MT6397_REGULATOR_ID91:
 370                 mt6397_regulators[MT6397_ID_VGP2].desc.volt_table =
 371                 ldo_volt_table5_v2;
 372                 break;
 373         default:
 374                 break;
 375         }
 376
 377         for (i = 0; i < MT6397_MAX_REGULATOR; i++) {
 378                 config.dev = &pdev->dev;
 379                 config.driver_data = &mt6397_regulators[i];
 380                 config.regmap = mt6397->regmap;
 381                 rdev = devm_regulator_register(&pdev->dev,
 382                                 &mt6397_regulators[i].desc, &config);
 383                 if (IS_ERR(rdev)) {
 384                         dev_err(&pdev->dev, "failed to register %s\n",
 385                                 mt6397_regulators[i].desc.name);
 386                         return PTR_ERR(rdev);
 387                 }
 388         }
 389
 390         return 0;
 391 }
 392
 393 static const struct platform_device_id mt6397_platform_ids[] = {
 394         {"mt6397-regulator", 0},
 395         { /* sentinel */ },
 396 };
 397 MODULE_DEVICE_TABLE(platform, mt6397_platform_ids);
 398
 399 static const struct of_device_id mt6397_of_match[] = {
 400         { .compatible = "mediatek,mt6397-regulator", },
 401         { /* sentinel */ },
 402 };
 403 MODULE_DEVICE_TABLE(of, mt6397_of_match);
 404
 405 static struct platform_driver mt6397_regulator_driver = {
 406         .driver = {
 407                 .name = "mt6397-regulator",
 408                 .of_match_table = of_match_ptr(mt6397_of_match),
 409         },
 410         .probe = mt6397_regulator_probe,
 411         .id_table = mt6397_platform_ids,
 412 };
 413
 414 module_platform_driver(mt6397_regulator_driver);
 415
 416 MODULE_AUTHOR("Flora Fu <flora.fu@mediatek.com>");
 417 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6397 PMIC");
 418 MODULE_LICENSE("GPL");