drivers/regulator/mt6323-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2016 MediaTek Inc.
   4 // Author: Chen Zhong <chen.zhong@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/mt6323/registers.h>
  12 #include <linux/regulator/driver.h>
  13 #include <linux/regulator/machine.h>
  14 #include <linux/regulator/mt6323-regulator.h>
  15 #include <linux/regulator/of_regulator.h>
  16
  17 #define MT6323_LDO_MODE_NORMAL  0
  18 #define MT6323_LDO_MODE_LP      1
  19
  20 /*
  21  * MT6323 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 mt6323_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 };
  38
  39 #define MT6323_BUCK(match, vreg, min, max, step, volt_ranges, enreg,    \
  40                 vosel, vosel_mask, voselon, vosel_ctrl)                 \
  41 [MT6323_ID_##vreg] = {                                                  \
  42         .desc = {                                                       \
  43                 .name = #vreg,                                          \
  44                 .of_match = of_match_ptr(match),                        \
  45                 .ops = &mt6323_volt_range_ops,                          \
  46                 .type = REGULATOR_VOLTAGE,                              \
  47                 .id = MT6323_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         },                                                              \
  57         .qi = BIT(13),                                                  \
  58         .vselon_reg = voselon,                                          \
  59         .vselctrl_reg = vosel_ctrl,                                     \
  60         .vselctrl_mask = BIT(1),                                        \
  61 }
  62
  63 #define MT6323_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel,    \
  64                 vosel_mask, _modeset_reg, _modeset_mask)                \
  65 [MT6323_ID_##vreg] = {                                                  \
  66         .desc = {                                                       \
  67                 .name = #vreg,                                          \
  68                 .of_match = of_match_ptr(match),                        \
  69                 .ops = &mt6323_volt_table_ops,                          \
  70                 .type = REGULATOR_VOLTAGE,                              \
  71                 .id = MT6323_ID_##vreg,                                 \
  72                 .owner = THIS_MODULE,                                   \
  73                 .n_voltages = ARRAY_SIZE(ldo_volt_table),               \
  74                 .volt_table = ldo_volt_table,                           \
  75                 .vsel_reg = vosel,                                      \
  76                 .vsel_mask = vosel_mask,                                \
  77                 .enable_reg = enreg,                                    \
  78                 .enable_mask = BIT(enbit),                              \
  79         },                                                              \
  80         .qi = BIT(15),                                                  \
  81         .modeset_reg = _modeset_reg,                                    \
  82         .modeset_mask = _modeset_mask,                                  \
  83 }
  84
  85 #define MT6323_REG_FIXED(match, vreg, enreg, enbit, volt,               \
  86                 _modeset_reg, _modeset_mask)                            \
  87 [MT6323_ID_##vreg] = {                                                  \
  88         .desc = {                                                       \
  89                 .name = #vreg,                                          \
  90                 .of_match = of_match_ptr(match),                        \
  91                 .ops = &mt6323_volt_fixed_ops,                          \
  92                 .type = REGULATOR_VOLTAGE,                              \
  93                 .id = MT6323_ID_##vreg,                                 \
  94                 .owner = THIS_MODULE,                                   \
  95                 .n_voltages = 1,                                        \
  96                 .enable_reg = enreg,                                    \
  97                 .enable_mask = BIT(enbit),                              \
  98                 .min_uV = volt,                                         \
  99         },                                                              \
 100         .qi = BIT(15),                                                  \
 101         .modeset_reg = _modeset_reg,                                    \
 102         .modeset_mask = _modeset_mask,                                  \
 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(1400000, 0, 0x7f, 12500),
 111 };
 112
 113 static const struct regulator_linear_range buck_volt_range3[] = {
 114         REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),
 115 };
 116
 117 static const unsigned int ldo_volt_table1[] = {
 118         3300000, 3400000, 3500000, 3600000,
 119 };
 120
 121 static const unsigned int ldo_volt_table2[] = {
 122         1500000, 1800000, 2500000, 2800000,
 123 };
 124
 125 static const unsigned int ldo_volt_table3[] = {
 126         1800000, 3300000,
 127 };
 128
 129 static const unsigned int ldo_volt_table4[] = {
 130         3000000, 3300000,
 131 };
 132
 133 static const unsigned int ldo_volt_table5[] = {
 134         1200000, 1300000, 1500000, 1800000, 2000000, 2800000, 3000000, 3300000,
 135 };
 136
 137 static const unsigned int ldo_volt_table6[] = {
 138         1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,
 139 };
 140
 141 static const unsigned int ldo_volt_table7[] = {
 142         1200000, 1300000, 1500000, 1800000,
 143 };
 144
 145 static const unsigned int ldo_volt_table8[] = {
 146         1800000, 3000000,
 147 };
 148
 149 static const unsigned int ldo_volt_table9[] = {
 150         1200000, 1350000, 1500000, 1800000,
 151 };
 152
 153 static const unsigned int ldo_volt_table10[] = {
 154         1200000, 1300000, 1500000, 1800000,
 155 };
 156
 157 static int mt6323_get_status(struct regulator_dev *rdev)
 158 {
 159         int ret;
 160         u32 regval;
 161         struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
 162
 163         ret = regmap_read(rdev->regmap, info->desc.enable_reg, &regval);
 164         if (ret != 0) {
 165                 dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);
 166                 return ret;
 167         }
 168
 169         return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
 170 }
 171
 172 static int mt6323_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
 173 {
 174         int ret, val = 0;
 175         struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
 176
 177         if (!info->modeset_mask) {
 178                 dev_err(&rdev->dev, "regulator %s doesn't support set_mode\n",
 179                         info->desc.name);
 180                 return -EINVAL;
 181         }
 182
 183         switch (mode) {
 184         case REGULATOR_MODE_STANDBY:
 185                 val = MT6323_LDO_MODE_LP;
 186                 break;
 187         case REGULATOR_MODE_NORMAL:
 188                 val = MT6323_LDO_MODE_NORMAL;
 189                 break;
 190         default:
 191                 return -EINVAL;
 192         }
 193
 194         val <<= ffs(info->modeset_mask) - 1;
 195
 196         ret = regmap_update_bits(rdev->regmap, info->modeset_reg,
 197                                   info->modeset_mask, val);
 198
 199         return ret;
 200 }
 201
 202 static unsigned int mt6323_ldo_get_mode(struct regulator_dev *rdev)
 203 {
 204         unsigned int val;
 205         unsigned int mode;
 206         int ret;
 207         struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
 208
 209         if (!info->modeset_mask) {
 210                 dev_err(&rdev->dev, "regulator %s doesn't support get_mode\n",
 211                         info->desc.name);
 212                 return -EINVAL;
 213         }
 214
 215         ret = regmap_read(rdev->regmap, info->modeset_reg, &val);
 216         if (ret < 0)
 217                 return ret;
 218
 219         val &= info->modeset_mask;
 220         val >>= ffs(info->modeset_mask) - 1;
 221
 222         if (val & 0x1)
 223                 mode = REGULATOR_MODE_STANDBY;
 224         else
 225                 mode = REGULATOR_MODE_NORMAL;
 226
 227         return mode;
 228 }
 229
 230 static const struct regulator_ops mt6323_volt_range_ops = {
 231         .list_voltage = regulator_list_voltage_linear_range,
 232         .map_voltage = regulator_map_voltage_linear_range,
 233         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 234         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 235         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 236         .enable = regulator_enable_regmap,
 237         .disable = regulator_disable_regmap,
 238         .is_enabled = regulator_is_enabled_regmap,
 239         .get_status = mt6323_get_status,
 240 };
 241
 242 static const struct regulator_ops mt6323_volt_table_ops = {
 243         .list_voltage = regulator_list_voltage_table,
 244         .map_voltage = regulator_map_voltage_iterate,
 245         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 246         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 247         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 248         .enable = regulator_enable_regmap,
 249         .disable = regulator_disable_regmap,
 250         .is_enabled = regulator_is_enabled_regmap,
 251         .get_status = mt6323_get_status,
 252         .set_mode = mt6323_ldo_set_mode,
 253         .get_mode = mt6323_ldo_get_mode,
 254 };
 255
 256 static const struct regulator_ops mt6323_volt_fixed_ops = {
 257         .list_voltage = regulator_list_voltage_linear,
 258         .enable = regulator_enable_regmap,
 259         .disable = regulator_disable_regmap,
 260         .is_enabled = regulator_is_enabled_regmap,
 261         .get_status = mt6323_get_status,
 262         .set_mode = mt6323_ldo_set_mode,
 263         .get_mode = mt6323_ldo_get_mode,
 264 };
 265
 266 /* The array is indexed by id(MT6323_ID_XXX) */
 267 static struct mt6323_regulator_info mt6323_regulators[] = {
 268         MT6323_BUCK("buck_vproc", VPROC, 700000, 1493750, 6250,
 269                 buck_volt_range1, MT6323_VPROC_CON7, MT6323_VPROC_CON9, 0x7f,
 270                 MT6323_VPROC_CON10, MT6323_VPROC_CON5),
 271         MT6323_BUCK("buck_vsys", VSYS, 1400000, 2987500, 12500,
 272                 buck_volt_range2, MT6323_VSYS_CON7, MT6323_VSYS_CON9, 0x7f,
 273                 MT6323_VSYS_CON10, MT6323_VSYS_CON5),
 274         MT6323_BUCK("buck_vpa", VPA, 500000, 3650000, 50000,
 275                 buck_volt_range3, MT6323_VPA_CON7, MT6323_VPA_CON9,
 276                 0x3f, MT6323_VPA_CON10, MT6323_VPA_CON5),
 277         MT6323_REG_FIXED("ldo_vtcxo", VTCXO, MT6323_ANALDO_CON1, 10, 2800000,
 278                 MT6323_ANALDO_CON1, 0x2),
 279         MT6323_REG_FIXED("ldo_vcn28", VCN28, MT6323_ANALDO_CON19, 12, 2800000,
 280                 MT6323_ANALDO_CON20, 0x2),
 281         MT6323_LDO("ldo_vcn33_bt", VCN33_BT, ldo_volt_table1,
 282                 MT6323_ANALDO_CON16, 7, MT6323_ANALDO_CON16, 0xC,
 283                 MT6323_ANALDO_CON21, 0x2),
 284         MT6323_LDO("ldo_vcn33_wifi", VCN33_WIFI, ldo_volt_table1,
 285                 MT6323_ANALDO_CON17, 12, MT6323_ANALDO_CON16, 0xC,
 286                 MT6323_ANALDO_CON21, 0x2),
 287         MT6323_REG_FIXED("ldo_va", VA, MT6323_ANALDO_CON2, 14, 2800000,
 288                 MT6323_ANALDO_CON2, 0x2),
 289         MT6323_LDO("ldo_vcama", VCAMA, ldo_volt_table2,
 290                 MT6323_ANALDO_CON4, 15, MT6323_ANALDO_CON10, 0x60, -1, 0),
 291         MT6323_REG_FIXED("ldo_vio28", VIO28, MT6323_DIGLDO_CON0, 14, 2800000,
 292                 MT6323_DIGLDO_CON0, 0x2),
 293         MT6323_REG_FIXED("ldo_vusb", VUSB, MT6323_DIGLDO_CON2, 14, 3300000,
 294                 MT6323_DIGLDO_CON2, 0x2),
 295         MT6323_LDO("ldo_vmc", VMC, ldo_volt_table3,
 296                 MT6323_DIGLDO_CON3, 12, MT6323_DIGLDO_CON24, 0x10,
 297                 MT6323_DIGLDO_CON3, 0x2),
 298         MT6323_LDO("ldo_vmch", VMCH, ldo_volt_table4,
 299                 MT6323_DIGLDO_CON5, 14, MT6323_DIGLDO_CON26, 0x80,
 300                 MT6323_DIGLDO_CON5, 0x2),
 301         MT6323_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table4,
 302                 MT6323_DIGLDO_CON6, 14, MT6323_DIGLDO_CON27, 0x80,
 303                 MT6323_DIGLDO_CON6, 0x2),
 304         MT6323_LDO("ldo_vgp1", VGP1, ldo_volt_table5,
 305                 MT6323_DIGLDO_CON7, 15, MT6323_DIGLDO_CON28, 0xE0,
 306                 MT6323_DIGLDO_CON7, 0x2),
 307         MT6323_LDO("ldo_vgp2", VGP2, ldo_volt_table6,
 308                 MT6323_DIGLDO_CON8, 15, MT6323_DIGLDO_CON29, 0xE0,
 309                 MT6323_DIGLDO_CON8, 0x2),
 310         MT6323_LDO("ldo_vgp3", VGP3, ldo_volt_table7,
 311                 MT6323_DIGLDO_CON9, 15, MT6323_DIGLDO_CON30, 0x60,
 312                 MT6323_DIGLDO_CON9, 0x2),
 313         MT6323_REG_FIXED("ldo_vcn18", VCN18, MT6323_DIGLDO_CON11, 14, 1800000,
 314                 MT6323_DIGLDO_CON11, 0x2),
 315         MT6323_LDO("ldo_vsim1", VSIM1, ldo_volt_table8,
 316                 MT6323_DIGLDO_CON13, 15, MT6323_DIGLDO_CON34, 0x20,
 317                 MT6323_DIGLDO_CON13, 0x2),
 318         MT6323_LDO("ldo_vsim2", VSIM2, ldo_volt_table8,
 319                 MT6323_DIGLDO_CON14, 15, MT6323_DIGLDO_CON35, 0x20,
 320                 MT6323_DIGLDO_CON14, 0x2),
 321         MT6323_REG_FIXED("ldo_vrtc", VRTC, MT6323_DIGLDO_CON15, 8, 2800000,
 322                 -1, 0),
 323         MT6323_LDO("ldo_vcamaf", VCAMAF, ldo_volt_table5,
 324                 MT6323_DIGLDO_CON31, 15, MT6323_DIGLDO_CON32, 0xE0,
 325                 MT6323_DIGLDO_CON31, 0x2),
 326         MT6323_LDO("ldo_vibr", VIBR, ldo_volt_table5,
 327                 MT6323_DIGLDO_CON39, 15, MT6323_DIGLDO_CON40, 0xE0,
 328                 MT6323_DIGLDO_CON39, 0x2),
 329         MT6323_REG_FIXED("ldo_vrf18", VRF18, MT6323_DIGLDO_CON45, 15, 1825000,
 330                 MT6323_DIGLDO_CON45, 0x2),
 331         MT6323_LDO("ldo_vm", VM, ldo_volt_table9,
 332                 MT6323_DIGLDO_CON47, 14, MT6323_DIGLDO_CON48, 0x30,
 333                 MT6323_DIGLDO_CON47, 0x2),
 334         MT6323_REG_FIXED("ldo_vio18", VIO18, MT6323_DIGLDO_CON49, 14, 1800000,
 335                 MT6323_DIGLDO_CON49, 0x2),
 336         MT6323_LDO("ldo_vcamd", VCAMD, ldo_volt_table10,
 337                 MT6323_DIGLDO_CON51, 14, MT6323_DIGLDO_CON52, 0x60,
 338                 MT6323_DIGLDO_CON51, 0x2),
 339         MT6323_REG_FIXED("ldo_vcamio", VCAMIO, MT6323_DIGLDO_CON53, 14, 1800000,
 340                 MT6323_DIGLDO_CON53, 0x2),
 341 };
 342
 343 static int mt6323_set_buck_vosel_reg(struct platform_device *pdev)
 344 {
 345         struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent);
 346         int i;
 347         u32 regval;
 348
 349         for (i = 0; i < MT6323_MAX_REGULATOR; i++) {
 350                 if (mt6323_regulators[i].vselctrl_reg) {
 351                         if (regmap_read(mt6323->regmap,
 352                                 mt6323_regulators[i].vselctrl_reg,
 353                                 &regval) < 0) {
 354                                 dev_err(&pdev->dev,
 355                                         "Failed to read buck ctrl\n");
 356                                 return -EIO;
 357                         }
 358
 359                         if (regval & mt6323_regulators[i].vselctrl_mask) {
 360                                 mt6323_regulators[i].desc.vsel_reg =
 361                                 mt6323_regulators[i].vselon_reg;
 362                         }
 363                 }
 364         }
 365
 366         return 0;
 367 }
 368
 369 static int mt6323_regulator_probe(struct platform_device *pdev)
 370 {
 371         struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent);
 372         struct regulator_config config = {};
 373         struct regulator_dev *rdev;
 374         int i;
 375         u32 reg_value;
 376
 377         /* Query buck controller to select activated voltage register part */
 378         if (mt6323_set_buck_vosel_reg(pdev))
 379                 return -EIO;
 380
 381         /* Read PMIC chip revision to update constraints and voltage table */
 382         if (regmap_read(mt6323->regmap, MT6323_CID, &reg_value) < 0) {
 383                 dev_err(&pdev->dev, "Failed to read Chip ID\n");
 384                 return -EIO;
 385         }
 386         dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value);
 387
 388         for (i = 0; i < MT6323_MAX_REGULATOR; i++) {
 389                 config.dev = &pdev->dev;
 390                 config.driver_data = &mt6323_regulators[i];
 391                 config.regmap = mt6323->regmap;
 392                 rdev = devm_regulator_register(&pdev->dev,
 393                                 &mt6323_regulators[i].desc, &config);
 394                 if (IS_ERR(rdev)) {
 395                         dev_err(&pdev->dev, "failed to register %s\n",
 396                                 mt6323_regulators[i].desc.name);
 397                         return PTR_ERR(rdev);
 398                 }
 399         }
 400         return 0;
 401 }
 402
 403 static const struct platform_device_id mt6323_platform_ids[] = {
 404         {"mt6323-regulator", 0},
 405         { /* sentinel */ },
 406 };
 407 MODULE_DEVICE_TABLE(platform, mt6323_platform_ids);
 408
 409 static struct platform_driver mt6323_regulator_driver = {
 410         .driver = {
 411                 .name = "mt6323-regulator",
 412         },
 413         .probe = mt6323_regulator_probe,
 414         .id_table = mt6323_platform_ids,
 415 };
 416
 417 module_platform_driver(mt6323_regulator_driver);
 418
 419 MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
 420 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6323 PMIC");
 421 MODULE_LICENSE("GPL v2");