drivers/regulator/mt6323-regulator.c

   1 /*
   2  * Copyright (c) 2016 MediaTek Inc.
   3  * Author: Chen Zhong <chen.zhong@mediatek.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/of.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/regmap.h>
  14 #include <linux/mfd/mt6397/core.h>
  15 #include <linux/mfd/mt6323/registers.h>
  16 #include <linux/regulator/driver.h>
  17 #include <linux/regulator/machine.h>
  18 #include <linux/regulator/mt6323-regulator.h>
  19 #include <linux/regulator/of_regulator.h>
  20
  21 #define MT6323_LDO_MODE_NORMAL  0
  22 #define MT6323_LDO_MODE_LP      1
  23
  24 /*
  25  * MT6323 regulators' information
  26  *
  27  * @desc: standard fields of regulator description.
  28  * @qi: Mask for query enable signal status of regulators
  29  * @vselon_reg: Register sections for hardware control mode of bucks
  30  * @vselctrl_reg: Register for controlling the buck control mode.
  31  * @vselctrl_mask: Mask for query buck's voltage control mode.
  32  */
  33 struct mt6323_regulator_info {
  34         struct regulator_desc desc;
  35         u32 qi;
  36         u32 vselon_reg;
  37         u32 vselctrl_reg;
  38         u32 vselctrl_mask;
  39         u32 modeset_reg;
  40         u32 modeset_mask;
  41 };
  42
  43 #define MT6323_BUCK(match, vreg, min, max, step, volt_ranges, enreg,    \
  44                 vosel, vosel_mask, voselon, vosel_ctrl)                 \
  45 [MT6323_ID_##vreg] = {                                                  \
  46         .desc = {                                                       \
  47                 .name = #vreg,                                          \
  48                 .of_match = of_match_ptr(match),                        \
  49                 .ops = &mt6323_volt_range_ops,                          \
  50                 .type = REGULATOR_VOLTAGE,                              \
  51                 .id = MT6323_ID_##vreg,                                 \
  52                 .owner = THIS_MODULE,                                   \
  53                 .n_voltages = (max - min)/step + 1,                     \
  54                 .linear_ranges = volt_ranges,                           \
  55                 .n_linear_ranges = ARRAY_SIZE(volt_ranges),             \
  56                 .vsel_reg = vosel,                                      \
  57                 .vsel_mask = vosel_mask,                                \
  58                 .enable_reg = enreg,                                    \
  59                 .enable_mask = BIT(0),                                  \
  60         },                                                              \
  61         .qi = BIT(13),                                                  \
  62         .vselon_reg = voselon,                                          \
  63         .vselctrl_reg = vosel_ctrl,                                     \
  64         .vselctrl_mask = BIT(1),                                        \
  65 }
  66
  67 #define MT6323_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel,    \
  68                 vosel_mask, _modeset_reg, _modeset_mask)                \
  69 [MT6323_ID_##vreg] = {                                                  \
  70         .desc = {                                                       \
  71                 .name = #vreg,                                          \
  72                 .of_match = of_match_ptr(match),                        \
  73                 .ops = &mt6323_volt_table_ops,                          \
  74                 .type = REGULATOR_VOLTAGE,                              \
  75                 .id = MT6323_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         .modeset_reg = _modeset_reg,                                    \
  86         .modeset_mask = _modeset_mask,                                  \
  87 }
  88
  89 #define MT6323_REG_FIXED(match, vreg, enreg, enbit, volt,               \
  90                 _modeset_reg, _modeset_mask)                            \
  91 [MT6323_ID_##vreg] = {                                                  \
  92         .desc = {                                                       \
  93                 .name = #vreg,                                          \
  94                 .of_match = of_match_ptr(match),                        \
  95                 .ops = &mt6323_volt_fixed_ops,                          \
  96                 .type = REGULATOR_VOLTAGE,                              \
  97                 .id = MT6323_ID_##vreg,                                 \
  98                 .owner = THIS_MODULE,                                   \
  99                 .n_voltages = 1,                                        \
 100                 .enable_reg = enreg,                                    \
 101                 .enable_mask = BIT(enbit),                              \
 102                 .min_uV = volt,                                         \
 103         },                                                              \
 104         .qi = BIT(15),                                                  \
 105         .modeset_reg = _modeset_reg,                                    \
 106         .modeset_mask = _modeset_mask,                                  \
 107 }
 108
 109 static const struct regulator_linear_range buck_volt_range1[] = {
 110         REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),
 111 };
 112
 113 static const struct regulator_linear_range buck_volt_range2[] = {
 114         REGULATOR_LINEAR_RANGE(1400000, 0, 0x7f, 12500),
 115 };
 116
 117 static const struct regulator_linear_range buck_volt_range3[] = {
 118         REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),
 119 };
 120
 121 static const u32 ldo_volt_table1[] = {
 122         3300000, 3400000, 3500000, 3600000,
 123 };
 124
 125 static const u32 ldo_volt_table2[] = {
 126         1500000, 1800000, 2500000, 2800000,
 127 };
 128
 129 static const u32 ldo_volt_table3[] = {
 130         1800000, 3300000,
 131 };
 132
 133 static const u32 ldo_volt_table4[] = {
 134         3000000, 3300000,
 135 };
 136
 137 static const u32 ldo_volt_table5[] = {
 138         1200000, 1300000, 1500000, 1800000, 2000000, 2800000, 3000000, 3300000,
 139 };
 140
 141 static const u32 ldo_volt_table6[] = {
 142         1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,
 143 };
 144
 145 static const u32 ldo_volt_table7[] = {
 146         1200000, 1300000, 1500000, 1800000,
 147 };
 148
 149 static const u32 ldo_volt_table8[] = {
 150         1800000, 3000000,
 151 };
 152
 153 static const u32 ldo_volt_table9[] = {
 154         1200000, 1350000, 1500000, 1800000,
 155 };
 156
 157 static const u32 ldo_volt_table10[] = {
 158         1200000, 1300000, 1500000, 1800000,
 159 };
 160
 161 static int mt6323_get_status(struct regulator_dev *rdev)
 162 {
 163         int ret;
 164         u32 regval;
 165         struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
 166
 167         ret = regmap_read(rdev->regmap, info->desc.enable_reg, &regval);
 168         if (ret != 0) {
 169                 dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);
 170                 return ret;
 171         }
 172
 173         return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
 174 }
 175
 176 static int mt6323_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
 177 {
 178         int ret, val = 0;
 179         struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
 180
 181         if (!info->modeset_mask) {
 182                 dev_err(&rdev->dev, "regulator %s doesn't support set_mode\n",
 183                         info->desc.name);
 184                 return -EINVAL;
 185         }
 186
 187         switch (mode) {
 188         case REGULATOR_MODE_STANDBY:
 189                 val = MT6323_LDO_MODE_LP;
 190                 break;
 191         case REGULATOR_MODE_NORMAL:
 192                 val = MT6323_LDO_MODE_NORMAL;
 193                 break;
 194         default:
 195                 return -EINVAL;
 196         }
 197
 198         val <<= ffs(info->modeset_mask) - 1;
 199
 200         ret = regmap_update_bits(rdev->regmap, info->modeset_reg,
 201                                   info->modeset_mask, val);
 202
 203         return ret;
 204 }
 205
 206 static unsigned int mt6323_ldo_get_mode(struct regulator_dev *rdev)
 207 {
 208         unsigned int val;
 209         unsigned int mode;
 210         int ret;
 211         struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);
 212
 213         if (!info->modeset_mask) {
 214                 dev_err(&rdev->dev, "regulator %s doesn't support get_mode\n",
 215                         info->desc.name);
 216                 return -EINVAL;
 217         }
 218
 219         ret = regmap_read(rdev->regmap, info->modeset_reg, &val);
 220         if (ret < 0)
 221                 return ret;
 222
 223         val &= info->modeset_mask;
 224         val >>= ffs(info->modeset_mask) - 1;
 225
 226         if (val & 0x1)
 227                 mode = REGULATOR_MODE_STANDBY;
 228         else
 229                 mode = REGULATOR_MODE_NORMAL;
 230
 231         return mode;
 232 }
 233
 234 static const struct regulator_ops mt6323_volt_range_ops = {
 235         .list_voltage = regulator_list_voltage_linear_range,
 236         .map_voltage = regulator_map_voltage_linear_range,
 237         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 238         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 239         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 240         .enable = regulator_enable_regmap,
 241         .disable = regulator_disable_regmap,
 242         .is_enabled = regulator_is_enabled_regmap,
 243         .get_status = mt6323_get_status,
 244 };
 245
 246 static const struct regulator_ops mt6323_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 = mt6323_get_status,
 256         .set_mode = mt6323_ldo_set_mode,
 257         .get_mode = mt6323_ldo_get_mode,
 258 };
 259
 260 static const struct regulator_ops mt6323_volt_fixed_ops = {
 261         .list_voltage = regulator_list_voltage_linear,
 262         .enable = regulator_enable_regmap,
 263         .disable = regulator_disable_regmap,
 264         .is_enabled = regulator_is_enabled_regmap,
 265         .get_status = mt6323_get_status,
 266         .set_mode = mt6323_ldo_set_mode,
 267         .get_mode = mt6323_ldo_get_mode,
 268 };
 269
 270 /* The array is indexed by id(MT6323_ID_XXX) */
 271 static struct mt6323_regulator_info mt6323_regulators[] = {
 272         MT6323_BUCK("buck_vproc", VPROC, 700000, 1493750, 6250,
 273                 buck_volt_range1, MT6323_VPROC_CON7, MT6323_VPROC_CON9, 0x7f,
 274                 MT6323_VPROC_CON10, MT6323_VPROC_CON5),
 275         MT6323_BUCK("buck_vsys", VSYS, 1400000, 2987500, 12500,
 276                 buck_volt_range2, MT6323_VSYS_CON7, MT6323_VSYS_CON9, 0x7f,
 277                 MT6323_VSYS_CON10, MT6323_VSYS_CON5),
 278         MT6323_BUCK("buck_vpa", VPA, 500000, 3650000, 50000,
 279                 buck_volt_range3, MT6323_VPA_CON7, MT6323_VPA_CON9,
 280                 0x3f, MT6323_VPA_CON10, MT6323_VPA_CON5),
 281         MT6323_REG_FIXED("ldo_vtcxo", VTCXO, MT6323_ANALDO_CON1, 10, 2800000,
 282                 MT6323_ANALDO_CON1, 0x2),
 283         MT6323_REG_FIXED("ldo_vcn28", VCN28, MT6323_ANALDO_CON19, 12, 2800000,
 284                 MT6323_ANALDO_CON20, 0x2),
 285         MT6323_LDO("ldo_vcn33_bt", VCN33_BT, ldo_volt_table1,
 286                 MT6323_ANALDO_CON16, 7, MT6323_ANALDO_CON16, 0xC,
 287                 MT6323_ANALDO_CON21, 0x2),
 288         MT6323_LDO("ldo_vcn33_wifi", VCN33_WIFI, ldo_volt_table1,
 289                 MT6323_ANALDO_CON17, 12, MT6323_ANALDO_CON16, 0xC,
 290                 MT6323_ANALDO_CON21, 0x2),
 291         MT6323_REG_FIXED("ldo_va", VA, MT6323_ANALDO_CON2, 14, 2800000,
 292                 MT6323_ANALDO_CON2, 0x2),
 293         MT6323_LDO("ldo_vcama", VCAMA, ldo_volt_table2,
 294                 MT6323_ANALDO_CON4, 15, MT6323_ANALDO_CON10, 0x60, -1, 0),
 295         MT6323_REG_FIXED("ldo_vio28", VIO28, MT6323_DIGLDO_CON0, 14, 2800000,
 296                 MT6323_DIGLDO_CON0, 0x2),
 297         MT6323_REG_FIXED("ldo_vusb", VUSB, MT6323_DIGLDO_CON2, 14, 3300000,
 298                 MT6323_DIGLDO_CON2, 0x2),
 299         MT6323_LDO("ldo_vmc", VMC, ldo_volt_table3,
 300                 MT6323_DIGLDO_CON3, 12, MT6323_DIGLDO_CON24, 0x10,
 301                 MT6323_DIGLDO_CON3, 0x2),
 302         MT6323_LDO("ldo_vmch", VMCH, ldo_volt_table4,
 303                 MT6323_DIGLDO_CON5, 14, MT6323_DIGLDO_CON26, 0x80,
 304                 MT6323_DIGLDO_CON5, 0x2),
 305         MT6323_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table4,
 306                 MT6323_DIGLDO_CON6, 14, MT6323_DIGLDO_CON27, 0x80,
 307                 MT6323_DIGLDO_CON6, 0x2),
 308         MT6323_LDO("ldo_vgp1", VGP1, ldo_volt_table5,
 309                 MT6323_DIGLDO_CON7, 15, MT6323_DIGLDO_CON28, 0xE0,
 310                 MT6323_DIGLDO_CON7, 0x2),
 311         MT6323_LDO("ldo_vgp2", VGP2, ldo_volt_table6,
 312                 MT6323_DIGLDO_CON8, 15, MT6323_DIGLDO_CON29, 0xE0,
 313                 MT6323_DIGLDO_CON8, 0x2),
 314         MT6323_LDO("ldo_vgp3", VGP3, ldo_volt_table7,
 315                 MT6323_DIGLDO_CON9, 15, MT6323_DIGLDO_CON30, 0x60,
 316                 MT6323_DIGLDO_CON9, 0x2),
 317         MT6323_REG_FIXED("ldo_vcn18", VCN18, MT6323_DIGLDO_CON11, 14, 1800000,
 318                 MT6323_DIGLDO_CON11, 0x2),
 319         MT6323_LDO("ldo_vsim1", VSIM1, ldo_volt_table8,
 320                 MT6323_DIGLDO_CON13, 15, MT6323_DIGLDO_CON34, 0x20,
 321                 MT6323_DIGLDO_CON13, 0x2),
 322         MT6323_LDO("ldo_vsim2", VSIM2, ldo_volt_table8,
 323                 MT6323_DIGLDO_CON14, 15, MT6323_DIGLDO_CON35, 0x20,
 324                 MT6323_DIGLDO_CON14, 0x2),
 325         MT6323_REG_FIXED("ldo_vrtc", VRTC, MT6323_DIGLDO_CON15, 8, 2800000,
 326                 -1, 0),
 327         MT6323_LDO("ldo_vcamaf", VCAMAF, ldo_volt_table5,
 328                 MT6323_DIGLDO_CON31, 15, MT6323_DIGLDO_CON32, 0xE0,
 329                 MT6323_DIGLDO_CON31, 0x2),
 330         MT6323_LDO("ldo_vibr", VIBR, ldo_volt_table5,
 331                 MT6323_DIGLDO_CON39, 15, MT6323_DIGLDO_CON40, 0xE0,
 332                 MT6323_DIGLDO_CON39, 0x2),
 333         MT6323_REG_FIXED("ldo_vrf18", VRF18, MT6323_DIGLDO_CON45, 15, 1825000,
 334                 MT6323_DIGLDO_CON45, 0x2),
 335         MT6323_LDO("ldo_vm", VM, ldo_volt_table9,
 336                 MT6323_DIGLDO_CON47, 14, MT6323_DIGLDO_CON48, 0x30,
 337                 MT6323_DIGLDO_CON47, 0x2),
 338         MT6323_REG_FIXED("ldo_vio18", VIO18, MT6323_DIGLDO_CON49, 14, 1800000,
 339                 MT6323_DIGLDO_CON49, 0x2),
 340         MT6323_LDO("ldo_vcamd", VCAMD, ldo_volt_table10,
 341                 MT6323_DIGLDO_CON51, 14, MT6323_DIGLDO_CON52, 0x60,
 342                 MT6323_DIGLDO_CON51, 0x2),
 343         MT6323_REG_FIXED("ldo_vcamio", VCAMIO, MT6323_DIGLDO_CON53, 14, 1800000,
 344                 MT6323_DIGLDO_CON53, 0x2),
 345 };
 346
 347 static int mt6323_set_buck_vosel_reg(struct platform_device *pdev)
 348 {
 349         struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent);
 350         int i;
 351         u32 regval;
 352
 353         for (i = 0; i < MT6323_MAX_REGULATOR; i++) {
 354                 if (mt6323_regulators[i].vselctrl_reg) {
 355                         if (regmap_read(mt6323->regmap,
 356                                 mt6323_regulators[i].vselctrl_reg,
 357                                 &regval) < 0) {
 358                                 dev_err(&pdev->dev,
 359                                         "Failed to read buck ctrl\n");
 360                                 return -EIO;
 361                         }
 362
 363                         if (regval & mt6323_regulators[i].vselctrl_mask) {
 364                                 mt6323_regulators[i].desc.vsel_reg =
 365                                 mt6323_regulators[i].vselon_reg;
 366                         }
 367                 }
 368         }
 369
 370         return 0;
 371 }
 372
 373 static int mt6323_regulator_probe(struct platform_device *pdev)
 374 {
 375         struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent);
 376         struct regulator_config config = {};
 377         struct regulator_dev *rdev;
 378         int i;
 379         u32 reg_value;
 380
 381         /* Query buck controller to select activated voltage register part */
 382         if (mt6323_set_buck_vosel_reg(pdev))
 383                 return -EIO;
 384
 385         /* Read PMIC chip revision to update constraints and voltage table */
 386         if (regmap_read(mt6323->regmap, MT6323_CID, &reg_value) < 0) {
 387                 dev_err(&pdev->dev, "Failed to read Chip ID\n");
 388                 return -EIO;
 389         }
 390         dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value);
 391
 392         for (i = 0; i < MT6323_MAX_REGULATOR; i++) {
 393                 config.dev = &pdev->dev;
 394                 config.driver_data = &mt6323_regulators[i];
 395                 config.regmap = mt6323->regmap;
 396                 rdev = devm_regulator_register(&pdev->dev,
 397                                 &mt6323_regulators[i].desc, &config);
 398                 if (IS_ERR(rdev)) {
 399                         dev_err(&pdev->dev, "failed to register %s\n",
 400                                 mt6323_regulators[i].desc.name);
 401                         return PTR_ERR(rdev);
 402                 }
 403         }
 404         return 0;
 405 }
 406
 407 static const struct platform_device_id mt6323_platform_ids[] = {
 408         {"mt6323-regulator", 0},
 409         { /* sentinel */ },
 410 };
 411 MODULE_DEVICE_TABLE(platform, mt6323_platform_ids);
 412
 413 static struct platform_driver mt6323_regulator_driver = {
 414         .driver = {
 415                 .name = "mt6323-regulator",
 416         },
 417         .probe = mt6323_regulator_probe,
 418         .id_table = mt6323_platform_ids,
 419 };
 420
 421 module_platform_driver(mt6323_regulator_driver);
 422
 423 MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
 424 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6323 PMIC");
 425 MODULE_LICENSE("GPL v2");