drivers/regulator/mt6380-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2017 MediaTek Inc.
   4 // Author: Chenglin Xu <chenglin.xu@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/regulator/driver.h>
  11 #include <linux/regulator/machine.h>
  12 #include <linux/regulator/mt6380-regulator.h>
  13 #include <linux/regulator/of_regulator.h>
  14
  15 /* PMIC Registers */
  16 #define MT6380_ALDO_CON_0                         0x0000
  17 #define MT6380_BTLDO_CON_0                        0x0004
  18 #define MT6380_COMP_CON_0                         0x0008
  19 #define MT6380_CPUBUCK_CON_0                      0x000C
  20 #define MT6380_CPUBUCK_CON_1                      0x0010
  21 #define MT6380_CPUBUCK_CON_2                      0x0014
  22 #define MT6380_DDRLDO_CON_0                       0x0018
  23 #define MT6380_MLDO_CON_0                         0x001C
  24 #define MT6380_PALDO_CON_0                        0x0020
  25 #define MT6380_PHYLDO_CON_0                       0x0024
  26 #define MT6380_SIDO_CON_0                         0x0028
  27 #define MT6380_SIDO_CON_1                         0x002C
  28 #define MT6380_SIDO_CON_2                         0x0030
  29 #define MT6380_SLDO_CON_0                         0x0034
  30 #define MT6380_TLDO_CON_0                         0x0038
  31 #define MT6380_STARTUP_CON_0                      0x003C
  32 #define MT6380_STARTUP_CON_1                      0x0040
  33 #define MT6380_SMPS_TOP_CON_0                     0x0044
  34 #define MT6380_SMPS_TOP_CON_1                     0x0048
  35 #define MT6380_ANA_CTRL_0                         0x0050
  36 #define MT6380_ANA_CTRL_1                         0x0054
  37 #define MT6380_ANA_CTRL_2                         0x0058
  38 #define MT6380_ANA_CTRL_3                         0x005C
  39 #define MT6380_ANA_CTRL_4                         0x0060
  40 #define MT6380_SPK_CON9                           0x0064
  41 #define MT6380_SPK_CON11                          0x0068
  42 #define MT6380_SPK_CON12                          0x006A
  43 #define MT6380_CLK_CTRL                           0x0070
  44 #define MT6380_PINMUX_CTRL                        0x0074
  45 #define MT6380_IO_CTRL                            0x0078
  46 #define MT6380_SLP_MODE_CTRL_0                    0x007C
  47 #define MT6380_SLP_MODE_CTRL_1                    0x0080
  48 #define MT6380_SLP_MODE_CTRL_2                    0x0084
  49 #define MT6380_SLP_MODE_CTRL_3                    0x0088
  50 #define MT6380_SLP_MODE_CTRL_4                    0x008C
  51 #define MT6380_SLP_MODE_CTRL_5                    0x0090
  52 #define MT6380_SLP_MODE_CTRL_6                    0x0094
  53 #define MT6380_SLP_MODE_CTRL_7                    0x0098
  54 #define MT6380_SLP_MODE_CTRL_8                    0x009C
  55 #define MT6380_FCAL_CTRL_0                        0x00A0
  56 #define MT6380_FCAL_CTRL_1                        0x00A4
  57 #define MT6380_LDO_CTRL_0                         0x00A8
  58 #define MT6380_LDO_CTRL_1                         0x00AC
  59 #define MT6380_LDO_CTRL_2                         0x00B0
  60 #define MT6380_LDO_CTRL_3                         0x00B4
  61 #define MT6380_LDO_CTRL_4                         0x00B8
  62 #define MT6380_DEBUG_CTRL_0                       0x00BC
  63 #define MT6380_EFU_CTRL_0                         0x0200
  64 #define MT6380_EFU_CTRL_1                         0x0201
  65 #define MT6380_EFU_CTRL_2                         0x0202
  66 #define MT6380_EFU_CTRL_3                         0x0203
  67 #define MT6380_EFU_CTRL_4                         0x0204
  68 #define MT6380_EFU_CTRL_5                         0x0205
  69 #define MT6380_EFU_CTRL_6                         0x0206
  70 #define MT6380_EFU_CTRL_7                         0x0207
  71 #define MT6380_EFU_CTRL_8                         0x0208
  72
  73 #define MT6380_REGULATOR_MODE_AUTO      0
  74 #define MT6380_REGULATOR_MODE_FORCE_PWM 1
  75
  76 /*
  77  * mt6380 regulators' information
  78  *
  79  * @desc: standard fields of regulator description
  80  * @vselon_reg: Register sections for hardware control mode of bucks
  81  * @modeset_reg: Register for controlling the buck/LDO control mode
  82  * @modeset_mask: Mask for controlling the buck/LDO control mode
  83  */
  84 struct mt6380_regulator_info {
  85         struct regulator_desc desc;
  86         u32 vselon_reg;
  87         u32 modeset_reg;
  88         u32 modeset_mask;
  89 };
  90
  91 #define MT6380_BUCK(match, vreg, min, max, step, volt_ranges, enreg,    \
  92                     vosel, vosel_mask, enbit, voselon, _modeset_reg,    \
  93                     _modeset_mask)                                      \
  94 [MT6380_ID_##vreg] = {                                                  \
  95         .desc = {                                                       \
  96                 .name = #vreg,                                          \
  97                 .of_match = of_match_ptr(match),                        \
  98                 .ops = &mt6380_volt_range_ops,                          \
  99                 .type = REGULATOR_VOLTAGE,                              \
 100                 .id = MT6380_ID_##vreg,                                 \
 101                 .owner = THIS_MODULE,                                   \
 102                 .n_voltages = ((max) - (min)) / (step) + 1,             \
 103                 .linear_ranges = volt_ranges,                           \
 104                 .n_linear_ranges = ARRAY_SIZE(volt_ranges),             \
 105                 .vsel_reg = vosel,                                      \
 106                 .vsel_mask = vosel_mask,                                \
 107                 .enable_reg = enreg,                                    \
 108                 .enable_mask = BIT(enbit),                              \
 109         },                                                              \
 110         .vselon_reg = voselon,                                          \
 111         .modeset_reg = _modeset_reg,                                    \
 112         .modeset_mask = _modeset_mask,                                  \
 113 }
 114
 115 #define MT6380_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel,    \
 116                    vosel_mask, _modeset_reg, _modeset_mask)             \
 117 [MT6380_ID_##vreg] = {                                                  \
 118         .desc = {                                                       \
 119                 .name = #vreg,                                          \
 120                 .of_match = of_match_ptr(match),                        \
 121                 .ops = &mt6380_volt_table_ops,                          \
 122                 .type = REGULATOR_VOLTAGE,                              \
 123                 .id = MT6380_ID_##vreg,                                 \
 124                 .owner = THIS_MODULE,                                   \
 125                 .n_voltages = ARRAY_SIZE(ldo_volt_table),               \
 126                 .volt_table = ldo_volt_table,                           \
 127                 .vsel_reg = vosel,                                      \
 128                 .vsel_mask = vosel_mask,                                \
 129                 .enable_reg = enreg,                                    \
 130                 .enable_mask = BIT(enbit),                              \
 131         },                                                              \
 132         .modeset_reg = _modeset_reg,                                    \
 133         .modeset_mask = _modeset_mask,                                  \
 134 }
 135
 136 #define MT6380_REG_FIXED(match, vreg, enreg, enbit, volt,               \
 137                          _modeset_reg, _modeset_mask)                   \
 138 [MT6380_ID_##vreg] = {                                                  \
 139         .desc = {                                                       \
 140                 .name = #vreg,                                          \
 141                 .of_match = of_match_ptr(match),                        \
 142                 .ops = &mt6380_volt_fixed_ops,                          \
 143                 .type = REGULATOR_VOLTAGE,                              \
 144                 .id = MT6380_ID_##vreg,                                 \
 145                 .owner = THIS_MODULE,                                   \
 146                 .n_voltages = 1,                                        \
 147                 .enable_reg = enreg,                                    \
 148                 .enable_mask = BIT(enbit),                              \
 149                 .min_uV = volt,                                         \
 150         },                                                              \
 151         .modeset_reg = _modeset_reg,                                    \
 152         .modeset_mask = _modeset_mask,                                  \
 153 }
 154
 155 static const struct linear_range buck_volt_range1[] = {
 156         REGULATOR_LINEAR_RANGE(600000, 0, 0xfe, 6250),
 157 };
 158
 159 static const struct linear_range buck_volt_range2[] = {
 160         REGULATOR_LINEAR_RANGE(600000, 0, 0xfe, 6250),
 161 };
 162
 163 static const struct linear_range buck_volt_range3[] = {
 164         REGULATOR_LINEAR_RANGE(1200000, 0, 0x3c, 25000),
 165 };
 166
 167 static const unsigned int ldo_volt_table1[] = {
 168         1400000, 1350000, 1300000, 1250000, 1200000, 1150000, 1100000, 1050000,
 169 };
 170
 171 static const unsigned int ldo_volt_table2[] = {
 172         2200000, 3300000,
 173 };
 174
 175 static const unsigned int ldo_volt_table3[] = {
 176         1240000, 1390000, 1540000, 1840000,
 177 };
 178
 179 static const unsigned int ldo_volt_table4[] = {
 180         2200000, 3300000,
 181 };
 182
 183 static int mt6380_regulator_set_mode(struct regulator_dev *rdev,
 184                                      unsigned int mode)
 185 {
 186         int val = 0;
 187         struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
 188
 189         switch (mode) {
 190         case REGULATOR_MODE_NORMAL:
 191                 val = MT6380_REGULATOR_MODE_AUTO;
 192                 break;
 193         case REGULATOR_MODE_FAST:
 194                 val = MT6380_REGULATOR_MODE_FORCE_PWM;
 195                 break;
 196         default:
 197                 return -EINVAL;
 198         }
 199
 200         val <<= ffs(info->modeset_mask) - 1;
 201
 202         return regmap_update_bits(rdev->regmap, info->modeset_reg,
 203                                  info->modeset_mask, val);
 204 }
 205
 206 static unsigned int mt6380_regulator_get_mode(struct regulator_dev *rdev)
 207 {
 208         unsigned int val;
 209         unsigned int mode;
 210         int ret;
 211         struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
 212
 213         ret = regmap_read(rdev->regmap, info->modeset_reg, &val);
 214         if (ret < 0)
 215                 return ret;
 216
 217         val &= info->modeset_mask;
 218         val >>= ffs(info->modeset_mask) - 1;
 219
 220         switch (val) {
 221         case MT6380_REGULATOR_MODE_AUTO:
 222                 mode = REGULATOR_MODE_NORMAL;
 223                 break;
 224         case MT6380_REGULATOR_MODE_FORCE_PWM:
 225                 mode = REGULATOR_MODE_FAST;
 226                 break;
 227         default:
 228                 return -EINVAL;
 229         }
 230
 231         return mode;
 232 }
 233
 234 static const struct regulator_ops mt6380_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         .set_mode = mt6380_regulator_set_mode,
 244         .get_mode = mt6380_regulator_get_mode,
 245 };
 246
 247 static const struct regulator_ops mt6380_volt_table_ops = {
 248         .list_voltage = regulator_list_voltage_table,
 249         .map_voltage = regulator_map_voltage_iterate,
 250         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 251         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 252         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 253         .enable = regulator_enable_regmap,
 254         .disable = regulator_disable_regmap,
 255         .is_enabled = regulator_is_enabled_regmap,
 256         .set_mode = mt6380_regulator_set_mode,
 257         .get_mode = mt6380_regulator_get_mode,
 258 };
 259
 260 static const struct regulator_ops mt6380_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         .set_mode = mt6380_regulator_set_mode,
 266         .get_mode = mt6380_regulator_get_mode,
 267 };
 268
 269 /* The array is indexed by id(MT6380_ID_XXX) */
 270 static struct mt6380_regulator_info mt6380_regulators[] = {
 271         MT6380_BUCK("buck-vcore1", VCPU, 600000, 1393750, 6250,
 272                     buck_volt_range1, MT6380_ANA_CTRL_3, MT6380_ANA_CTRL_1,
 273                     0xfe, 3, MT6380_ANA_CTRL_1,
 274                     MT6380_CPUBUCK_CON_0, 0x8000000),
 275         MT6380_BUCK("buck-vcore", VCORE, 600000, 1393750, 6250,
 276                     buck_volt_range2, MT6380_ANA_CTRL_3, MT6380_ANA_CTRL_2,
 277                     0xfe, 2, MT6380_ANA_CTRL_2, MT6380_SIDO_CON_0, 0x1000000),
 278         MT6380_BUCK("buck-vrf", VRF, 1200000, 1575000, 25000,
 279                     buck_volt_range3, MT6380_ANA_CTRL_3, MT6380_SIDO_CON_0,
 280                     0x78, 1, MT6380_SIDO_CON_0, MT6380_SIDO_CON_0, 0x8000),
 281         MT6380_LDO("ldo-vm", VMLDO, ldo_volt_table1, MT6380_LDO_CTRL_0,
 282                    1, MT6380_MLDO_CON_0, 0xE000, MT6380_ANA_CTRL_1, 0x4000000),
 283         MT6380_LDO("ldo-va", VALDO, ldo_volt_table2, MT6380_LDO_CTRL_0,
 284                    2, MT6380_ALDO_CON_0, 0x400, MT6380_ALDO_CON_0, 0x20),
 285         MT6380_REG_FIXED("ldo-vphy", VPHYLDO, MT6380_LDO_CTRL_0, 7, 1800000,
 286                          MT6380_PHYLDO_CON_0, 0x80),
 287         MT6380_LDO("ldo-vddr", VDDRLDO, ldo_volt_table3, MT6380_LDO_CTRL_0,
 288                    8, MT6380_DDRLDO_CON_0, 0x3000, MT6380_DDRLDO_CON_0, 0x80),
 289         MT6380_LDO("ldo-vt", VTLDO, ldo_volt_table4, MT6380_LDO_CTRL_0, 3,
 290                    MT6380_TLDO_CON_0, 0x400, MT6380_TLDO_CON_0, 0x20),
 291 };
 292
 293 static int mt6380_regulator_probe(struct platform_device *pdev)
 294 {
 295         struct regmap *regmap = dev_get_regmap(pdev->dev.parent, NULL);
 296         struct regulator_config config = {};
 297         struct regulator_dev *rdev;
 298         int i;
 299
 300         for (i = 0; i < MT6380_MAX_REGULATOR; i++) {
 301                 config.dev = &pdev->dev;
 302                 config.driver_data = &mt6380_regulators[i];
 303                 config.regmap = regmap;
 304                 rdev = devm_regulator_register(&pdev->dev,
 305                                                &mt6380_regulators[i].desc,
 306                                 &config);
 307                 if (IS_ERR(rdev)) {
 308                         dev_err(&pdev->dev, "failed to register %s\n",
 309                                 mt6380_regulators[i].desc.name);
 310                         return PTR_ERR(rdev);
 311                 }
 312         }
 313         return 0;
 314 }
 315
 316 static const struct platform_device_id mt6380_platform_ids[] = {
 317         {"mt6380-regulator", 0},
 318         { /* sentinel */ },
 319 };
 320 MODULE_DEVICE_TABLE(platform, mt6380_platform_ids);
 321
 322 static const struct of_device_id  __maybe_unused mt6380_of_match[] = {
 323         { .compatible = "mediatek,mt6380-regulator", },
 324         { /* sentinel */ },
 325 };
 326 MODULE_DEVICE_TABLE(of, mt6380_of_match);
 327
 328 static struct platform_driver mt6380_regulator_driver = {
 329         .driver = {
 330                 .name = "mt6380-regulator",
 331                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
 332                 .of_match_table = of_match_ptr(mt6380_of_match),
 333         },
 334         .probe = mt6380_regulator_probe,
 335         .id_table = mt6380_platform_ids,
 336 };
 337
 338 module_platform_driver(mt6380_regulator_driver);
 339
 340 MODULE_AUTHOR("Chenglin Xu <chenglin.xu@mediatek.com>");
 341 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6380 PMIC");
 342 MODULE_LICENSE("GPL v2");