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