drivers/regulator/mt6357-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2022 MediaTek Inc.
   4 // Copyright (c) 2022 BayLibre, SAS.
   5 // Author: Chen Zhong <chen.zhong@mediatek.com>
   6 // Author: Fabien Parent <fparent@baylibre.com>
   7 // Author: Alexandre Mergnat <amergnat@baylibre.com>
   8 //
   9 // Based on mt6397-regulator.c
  10 //
  11
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/regmap.h>
  16 #include <linux/mfd/mt6397/core.h>
  17 #include <linux/mfd/mt6357/registers.h>
  18 #include <linux/regulator/driver.h>
  19 #include <linux/regulator/machine.h>
  20 #include <linux/regulator/mt6357-regulator.h>
  21 #include <linux/regulator/of_regulator.h>
  22
  23 /*
  24  * MT6357 regulators' information
  25  *
  26  * @desc: standard fields of regulator description.
  27  * @da_vsel_reg: Monitor register for query buck's voltage.
  28  * @da_vsel_mask: Mask for query buck's voltage.
  29  */
  30 struct mt6357_regulator_info {
  31         struct regulator_desc desc;
  32         u32 da_vsel_reg;
  33         u32 da_vsel_mask;
  34 };
  35
  36 #define MT6357_BUCK(match, vreg, min, max, step,                \
  37         volt_ranges, vosel_reg, vosel_mask, _da_vsel_mask)      \
  38 [MT6357_ID_##vreg] = {          \
  39         .desc = {               \
  40                 .name = #vreg,  \
  41                 .of_match = of_match_ptr(match),                \
  42                 .regulators_node = "regulators",                \
  43                 .ops = &mt6357_volt_range_ops,  \
  44                 .type = REGULATOR_VOLTAGE,      \
  45                 .id = MT6357_ID_##vreg,         \
  46                 .owner = THIS_MODULE,           \
  47                 .n_voltages = ((max) - (min)) / (step) + 1,     \
  48                 .linear_ranges = volt_ranges,                   \
  49                 .n_linear_ranges = ARRAY_SIZE(volt_ranges),     \
  50                 .vsel_reg = vosel_reg,          \
  51                 .vsel_mask = vosel_mask,        \
  52                 .enable_reg = MT6357_BUCK_##vreg##_CON0,        \
  53                 .enable_mask = BIT(0),          \
  54         },      \
  55         .da_vsel_reg = MT6357_BUCK_##vreg##_DBG0,               \
  56         .da_vsel_mask = vosel_mask,             \
  57 }
  58
  59 #define MT6357_LDO(match, vreg, ldo_volt_table, \
  60         enreg, vosel, vosel_mask)               \
  61 [MT6357_ID_##vreg] = {          \
  62         .desc = {               \
  63                 .name = #vreg,  \
  64                 .of_match = of_match_ptr(match),                \
  65                 .regulators_node = "regulators",                \
  66                 .ops = &mt6357_volt_table_ops,  \
  67                 .type = REGULATOR_VOLTAGE,      \
  68                 .id = MT6357_ID_##vreg,         \
  69                 .owner = THIS_MODULE,           \
  70                 .n_voltages = ARRAY_SIZE(ldo_volt_table),       \
  71                 .volt_table = ldo_volt_table,   \
  72                 .vsel_reg = vosel,              \
  73                 .vsel_mask = vosel_mask,        \
  74                 .enable_reg = enreg,            \
  75                 .enable_mask = BIT(0),          \
  76         },      \
  77 }
  78
  79 #define MT6357_LDO1(match, vreg, min, max, step, volt_ranges,   \
  80         enreg, vosel, vosel_mask)               \
  81 [MT6357_ID_##vreg] = {          \
  82         .desc = {               \
  83                 .name = #vreg,  \
  84                 .of_match = of_match_ptr(match),                \
  85                 .regulators_node = "regulators",                \
  86                 .ops = &mt6357_volt_range_ops,  \
  87                 .type = REGULATOR_VOLTAGE,      \
  88                 .id = MT6357_ID_##vreg,         \
  89                 .owner = THIS_MODULE,           \
  90                 .n_voltages = ((max) - (min)) / (step) + 1,     \
  91                 .linear_ranges = volt_ranges,   \
  92                 .n_linear_ranges = ARRAY_SIZE(volt_ranges),     \
  93                 .vsel_reg = vosel,              \
  94                 .vsel_mask = vosel_mask,        \
  95                 .enable_reg = enreg,            \
  96                 .enable_mask = BIT(0),          \
  97         },      \
  98         .da_vsel_reg = MT6357_LDO_##vreg##_DBG0,                \
  99         .da_vsel_mask = 0x7f00, \
 100 }
 101
 102 #define MT6357_REG_FIXED(match, vreg, volt)     \
 103 [MT6357_ID_##vreg] = {                                  \
 104         .desc = {                                       \
 105                 .name = #vreg,                          \
 106                 .of_match = of_match_ptr(match),        \
 107                 .regulators_node = "regulators",        \
 108                 .ops = &mt6357_volt_fixed_ops,          \
 109                 .type = REGULATOR_VOLTAGE,              \
 110                 .id = MT6357_ID_##vreg,                 \
 111                 .owner = THIS_MODULE,                   \
 112                 .n_voltages = 1,                        \
 113                 .enable_reg = MT6357_LDO_##vreg##_CON0, \
 114                 .enable_mask = BIT(0),                  \
 115                 .min_uV = volt,                         \
 116         },                                              \
 117 }
 118
 119 /**
 120  * mt6357_get_buck_voltage_sel - get_voltage_sel for regmap users
 121  *
 122  * @rdev: regulator to operate on
 123  *
 124  * Regulators that use regmap for their register I/O can set the
 125  * da_vsel_reg and da_vsel_mask fields in the info structure and
 126  * then use this as their get_voltage_sel operation.
 127  */
 128 static int mt6357_get_buck_voltage_sel(struct regulator_dev *rdev)
 129 {
 130         int ret, regval;
 131         struct mt6357_regulator_info *info = rdev_get_drvdata(rdev);
 132
 133         ret = regmap_read(rdev->regmap, info->da_vsel_reg, &regval);
 134         if (ret != 0) {
 135                 dev_err(&rdev->dev,
 136                         "Failed to get mt6357 Buck %s vsel reg: %d\n",
 137                         info->desc.name, ret);
 138                 return ret;
 139         }
 140
 141         regval &= info->da_vsel_mask;
 142         regval >>= ffs(info->da_vsel_mask) - 1;
 143
 144         return regval;
 145 }
 146
 147 static const struct regulator_ops mt6357_volt_range_ops = {
 148         .list_voltage = regulator_list_voltage_linear_range,
 149         .map_voltage = regulator_map_voltage_linear_range,
 150         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 151         .get_voltage_sel = mt6357_get_buck_voltage_sel,
 152         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 153         .enable = regulator_enable_regmap,
 154         .disable = regulator_disable_regmap,
 155         .is_enabled = regulator_is_enabled_regmap,
 156 };
 157
 158 static const struct regulator_ops mt6357_volt_table_ops = {
 159         .list_voltage = regulator_list_voltage_table,
 160         .map_voltage = regulator_map_voltage_iterate,
 161         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 162         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 163         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 164         .enable = regulator_enable_regmap,
 165         .disable = regulator_disable_regmap,
 166         .is_enabled = regulator_is_enabled_regmap,
 167 };
 168
 169 static const struct regulator_ops mt6357_volt_fixed_ops = {
 170         .list_voltage = regulator_list_voltage_linear,
 171         .enable = regulator_enable_regmap,
 172         .disable = regulator_disable_regmap,
 173         .is_enabled = regulator_is_enabled_regmap,
 174 };
 175
 176 static const int vxo22_voltages[] = {
 177         2200000,
 178         0,
 179         2400000,
 180 };
 181
 182 static const int vefuse_voltages[] = {
 183         1200000,
 184         1300000,
 185         1500000,
 186         0,
 187         1800000,
 188         0,
 189         0,
 190         0,
 191         0,
 192         2800000,
 193         2900000,
 194         3000000,
 195         0,
 196         3300000,
 197 };
 198
 199 static const int vcn33_voltages[] = {
 200         0,
 201         3300000,
 202         3400000,
 203         3500000,
 204 };
 205
 206 static const int vcama_voltages[] = {
 207         0,
 208         0,
 209         0,
 210         0,
 211         0,
 212         0,
 213         0,
 214         2500000,
 215         0,
 216         0,
 217         2800000,
 218 };
 219
 220 static const int vcamd_voltages[] = {
 221         0,
 222         0,
 223         0,
 224         0,
 225         1000000,
 226         1100000,
 227         1200000,
 228         1300000,
 229         0,
 230         1500000,
 231         0,
 232         0,
 233         1800000,
 234 };
 235
 236 static const int vldo28_voltages[] = {
 237         0,
 238         2800000,
 239         0,
 240         3000000,
 241 };
 242
 243 static const int vdram_voltages[] = {
 244         0,
 245         1100000,
 246         1200000,
 247 };
 248
 249 static const int vsim_voltages[] = {
 250         0,
 251         0,
 252         0,
 253         1700000,
 254         1800000,
 255         0,
 256         0,
 257         0,
 258         2700000,
 259         0,
 260         0,
 261         3000000,
 262         3100000,
 263 };
 264
 265 static const int vibr_voltages[] = {
 266         1200000,
 267         1300000,
 268         1500000,
 269         0,
 270         1800000,
 271         2000000,
 272         0,
 273         0,
 274         0,
 275         2800000,
 276         0,
 277         3000000,
 278         0,
 279         3300000,
 280 };
 281
 282 static const int vmc_voltages[] = {
 283         0,
 284         0,
 285         0,
 286         0,
 287         1800000,
 288         0,
 289         0,
 290         0,
 291         0,
 292         0,
 293         2900000,
 294         3000000,
 295         0,
 296         3300000,
 297 };
 298
 299 static const int vmch_voltages[] = {
 300         0,
 301         0,
 302         2900000,
 303         3000000,
 304         0,
 305         3300000,
 306 };
 307
 308 static const int vemc_voltages[] = {
 309         0,
 310         0,
 311         2900000,
 312         3000000,
 313         0,
 314         3300000,
 315 };
 316
 317 static const int vusb_voltages[] = {
 318         0,
 319         0,
 320         0,
 321         3000000,
 322         3100000,
 323 };
 324
 325 static const struct linear_range buck_volt_range1[] = {
 326         REGULATOR_LINEAR_RANGE(518750, 0, 0x7f, 6250),
 327 };
 328
 329 static const struct linear_range buck_volt_range2[] = {
 330         REGULATOR_LINEAR_RANGE(500000, 0, 0x7f, 6250),
 331 };
 332
 333 static const struct linear_range buck_volt_range3[] = {
 334         REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),
 335 };
 336
 337 static const struct linear_range buck_volt_range4[] = {
 338         REGULATOR_LINEAR_RANGE(1200000, 0, 0x7f, 12500),
 339 };
 340
 341 /* The array is indexed by id(MT6357_ID_XXX) */
 342 static struct mt6357_regulator_info mt6357_regulators[] = {
 343         /* Bucks */
 344         MT6357_BUCK("buck-vcore", VCORE, 518750, 1312500, 6250,
 345                 buck_volt_range1, MT6357_BUCK_VCORE_ELR0, 0x7f, 0x7f),
 346         MT6357_BUCK("buck-vproc", VPROC, 518750, 1312500, 6250,
 347                 buck_volt_range1, MT6357_BUCK_VPROC_ELR0, 0x7f, 0x7f),
 348         MT6357_BUCK("buck-vmodem", VMODEM, 500000, 1293750, 6250,
 349                 buck_volt_range2, MT6357_BUCK_VMODEM_ELR0, 0x7f, 0x7f),
 350         MT6357_BUCK("buck-vpa", VPA, 500000, 3650000, 50000,
 351                 buck_volt_range3, MT6357_BUCK_VPA_CON1, 0x3f, 0x3f),
 352         MT6357_BUCK("buck-vs1", VS1, 1200000, 2787500, 12500,
 353                 buck_volt_range4, MT6357_BUCK_VS1_ELR0, 0x7f, 0x7f),
 354
 355         /* LDOs */
 356         MT6357_LDO("ldo-vcama", VCAMA, vcama_voltages,
 357                    MT6357_LDO_VCAMA_CON0, MT6357_VCAMA_ANA_CON0, 0xf00),
 358         MT6357_LDO("ldo-vcamd", VCAMD, vcamd_voltages,
 359                    MT6357_LDO_VCAMD_CON0, MT6357_VCAMD_ANA_CON0, 0xf00),
 360         MT6357_LDO("ldo-vcn33-bt", VCN33_BT, vcn33_voltages,
 361                    MT6357_LDO_VCN33_CON0_0, MT6357_VCN33_ANA_CON0, 0x300),
 362         MT6357_LDO("ldo-vcn33-wifi", VCN33_WIFI, vcn33_voltages,
 363                    MT6357_LDO_VCN33_CON0_1, MT6357_VCN33_ANA_CON0, 0x300),
 364         MT6357_LDO("ldo-vdram", VDRAM, vdram_voltages,
 365                    MT6357_LDO_VDRAM_CON0, MT6357_VDRAM_ELR_2, 0x300),
 366         MT6357_LDO("ldo-vefuse", VEFUSE, vefuse_voltages,
 367                    MT6357_LDO_VEFUSE_CON0, MT6357_VEFUSE_ANA_CON0, 0xf00),
 368         MT6357_LDO("ldo-vemc", VEMC, vemc_voltages,
 369                    MT6357_LDO_VEMC_CON0, MT6357_VEMC_ANA_CON0, 0x700),
 370         MT6357_LDO("ldo-vibr", VIBR, vibr_voltages,
 371                    MT6357_LDO_VIBR_CON0, MT6357_VIBR_ANA_CON0, 0xf00),
 372         MT6357_LDO("ldo-vldo28", VLDO28, vldo28_voltages,
 373                    MT6357_LDO_VLDO28_CON0_0, MT6357_VLDO28_ANA_CON0, 0x300),
 374         MT6357_LDO("ldo-vmc", VMC, vmc_voltages,
 375                    MT6357_LDO_VMC_CON0, MT6357_VMC_ANA_CON0, 0xf00),
 376         MT6357_LDO("ldo-vmch", VMCH, vmch_voltages,
 377                    MT6357_LDO_VMCH_CON0, MT6357_VMCH_ANA_CON0, 0x700),
 378         MT6357_LDO("ldo-vsim1", VSIM1, vsim_voltages,
 379                    MT6357_LDO_VSIM1_CON0, MT6357_VSIM1_ANA_CON0, 0xf00),
 380         MT6357_LDO("ldo-vsim2", VSIM2, vsim_voltages,
 381                    MT6357_LDO_VSIM2_CON0, MT6357_VSIM2_ANA_CON0, 0xf00),
 382         MT6357_LDO("ldo-vusb33", VUSB33, vusb_voltages,
 383                    MT6357_LDO_VUSB33_CON0_0, MT6357_VUSB33_ANA_CON0, 0x700),
 384         MT6357_LDO("ldo-vxo22", VXO22, vxo22_voltages,
 385                    MT6357_LDO_VXO22_CON0, MT6357_VXO22_ANA_CON0, 0x300),
 386
 387         MT6357_LDO1("ldo-vsram-proc", VSRAM_PROC, 518750, 1312500, 6250,
 388                    buck_volt_range1, MT6357_LDO_VSRAM_PROC_CON0,
 389                    MT6357_LDO_VSRAM_CON0, 0x7f00),
 390         MT6357_LDO1("ldo-vsram-others", VSRAM_OTHERS, 518750, 1312500, 6250,
 391                    buck_volt_range1, MT6357_LDO_VSRAM_OTHERS_CON0,
 392                    MT6357_LDO_VSRAM_CON1, 0x7f00),
 393
 394         MT6357_REG_FIXED("ldo-vaud28", VAUD28, 2800000),
 395         MT6357_REG_FIXED("ldo-vaux18", VAUX18, 1800000),
 396         MT6357_REG_FIXED("ldo-vcamio18", VCAMIO, 1800000),
 397         MT6357_REG_FIXED("ldo-vcn18", VCN18, 1800000),
 398         MT6357_REG_FIXED("ldo-vcn28", VCN28, 2800000),
 399         MT6357_REG_FIXED("ldo-vfe28", VFE28, 2800000),
 400         MT6357_REG_FIXED("ldo-vio18", VIO18, 1800000),
 401         MT6357_REG_FIXED("ldo-vio28", VIO28, 2800000),
 402         MT6357_REG_FIXED("ldo-vrf12", VRF12, 1200000),
 403         MT6357_REG_FIXED("ldo-vrf18", VRF18, 1800000),
 404 };
 405
 406 static int mt6357_regulator_probe(struct platform_device *pdev)
 407 {
 408         struct mt6397_chip *mt6357 = dev_get_drvdata(pdev->dev.parent);
 409         struct regulator_config config = {};
 410         struct regulator_dev *rdev;
 411         int i;
 412
 413         pdev->dev.of_node = pdev->dev.parent->of_node;
 414
 415         for (i = 0; i < MT6357_MAX_REGULATOR; i++) {
 416                 config.dev = &pdev->dev;
 417                 config.driver_data = &mt6357_regulators[i];
 418                 config.regmap = mt6357->regmap;
 419
 420                 rdev = devm_regulator_register(&pdev->dev,
 421                                                &mt6357_regulators[i].desc,
 422                                                &config);
 423                 if (IS_ERR(rdev)) {
 424                         dev_err(&pdev->dev, "failed to register %s\n",
 425                                 mt6357_regulators[i].desc.name);
 426                         return PTR_ERR(rdev);
 427                 }
 428         }
 429
 430         return 0;
 431 }
 432
 433 static const struct platform_device_id mt6357_platform_ids[] = {
 434         { "mt6357-regulator" },
 435         { /* sentinel */ },
 436 };
 437 MODULE_DEVICE_TABLE(platform, mt6357_platform_ids);
 438
 439 static struct platform_driver mt6357_regulator_driver = {
 440         .driver = {
 441                 .name = "mt6357-regulator",
 442                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 443         },
 444         .probe = mt6357_regulator_probe,
 445         .id_table = mt6357_platform_ids,
 446 };
 447
 448 module_platform_driver(mt6357_regulator_driver);
 449
 450 MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
 451 MODULE_AUTHOR("Fabien Parent <fabien.parent@linaro.org>");
 452 MODULE_AUTHOR("Alexandre Mergnat <amergnat@baylibre.com>");
 453 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6357 PMIC");
 454 MODULE_LICENSE("GPL");