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 #include <dt-bindings/regulator/mediatek,mt6397-regulator.h> 17 18 /* 19 * MT6397 regulators' information 20 * 21 * @desc: standard fields of regulator description. 22 * @qi: Mask for query enable signal status of regulators 23 * @vselon_reg: Register sections for hardware control mode of bucks 24 * @vselctrl_reg: Register for controlling the buck control mode. 25 * @vselctrl_mask: Mask for query buck's voltage control mode. 26 */ 27 struct mt6397_regulator_info { 28 struct regulator_desc desc; 29 u32 qi; 30 u32 vselon_reg; 31 u32 vselctrl_reg; 32 u32 vselctrl_mask; 33 u32 modeset_reg; 34 u32 modeset_mask; 35 }; 36 37 #define MT6397_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \ 38 vosel, vosel_mask, voselon, vosel_ctrl, _modeset_reg, \ 39 _modeset_shift) \ 40 [MT6397_ID_##vreg] = { \ 41 .desc = { \ 42 .name = #vreg, \ 43 .of_match = of_match_ptr(match), \ 44 .ops = &mt6397_volt_range_ops, \ 45 .type = REGULATOR_VOLTAGE, \ 46 .id = MT6397_ID_##vreg, \ 47 .owner = THIS_MODULE, \ 48 .n_voltages = (max - min)/step + 1, \ 49 .linear_ranges = volt_ranges, \ 50 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \ 51 .vsel_reg = vosel, \ 52 .vsel_mask = vosel_mask, \ 53 .enable_reg = enreg, \ 54 .enable_mask = BIT(0), \ 55 .of_map_mode = mt6397_map_mode, \ 56 }, \ 57 .qi = BIT(13), \ 58 .vselon_reg = voselon, \ 59 .vselctrl_reg = vosel_ctrl, \ 60 .vselctrl_mask = BIT(1), \ 61 .modeset_reg = _modeset_reg, \ 62 .modeset_mask = BIT(_modeset_shift), \ 63 } 64 65 #define MT6397_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \ 66 vosel_mask) \ 67 [MT6397_ID_##vreg] = { \ 68 .desc = { \ 69 .name = #vreg, \ 70 .of_match = of_match_ptr(match), \ 71 .ops = &mt6397_volt_table_ops, \ 72 .type = REGULATOR_VOLTAGE, \ 73 .id = MT6397_ID_##vreg, \ 74 .owner = THIS_MODULE, \ 75 .n_voltages = ARRAY_SIZE(ldo_volt_table), \ 76 .volt_table = ldo_volt_table, \ 77 .vsel_reg = vosel, \ 78 .vsel_mask = vosel_mask, \ 79 .enable_reg = enreg, \ 80 .enable_mask = BIT(enbit), \ 81 }, \ 82 .qi = BIT(15), \ 83 } 84 85 #define MT6397_REG_FIXED(match, vreg, enreg, enbit, volt) \ 86 [MT6397_ID_##vreg] = { \ 87 .desc = { \ 88 .name = #vreg, \ 89 .of_match = of_match_ptr(match), \ 90 .ops = &mt6397_volt_fixed_ops, \ 91 .type = REGULATOR_VOLTAGE, \ 92 .id = MT6397_ID_##vreg, \ 93 .owner = THIS_MODULE, \ 94 .n_voltages = 1, \ 95 .enable_reg = enreg, \ 96 .enable_mask = BIT(enbit), \ 97 .min_uV = volt, \ 98 }, \ 99 .qi = BIT(15), \ 100 } 101 102 static const struct linear_range buck_volt_range1[] = { 103 REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250), 104 }; 105 106 static const struct linear_range buck_volt_range2[] = { 107 REGULATOR_LINEAR_RANGE(800000, 0, 0x7f, 6250), 108 }; 109 110 static const struct linear_range buck_volt_range3[] = { 111 REGULATOR_LINEAR_RANGE(1500000, 0, 0x1f, 20000), 112 }; 113 114 static const unsigned int ldo_volt_table1[] = { 115 1500000, 1800000, 2500000, 2800000, 116 }; 117 118 static const unsigned int ldo_volt_table2[] = { 119 1800000, 3300000, 120 }; 121 122 static const unsigned int ldo_volt_table3[] = { 123 3000000, 3300000, 124 }; 125 126 static const unsigned int ldo_volt_table4[] = { 127 1220000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000, 128 }; 129 130 static const unsigned int ldo_volt_table5[] = { 131 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000, 132 }; 133 134 static const unsigned int ldo_volt_table5_v2[] = { 135 1200000, 1000000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000, 136 }; 137 138 static const unsigned int ldo_volt_table6[] = { 139 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000, 140 }; 141 142 static const unsigned int ldo_volt_table7[] = { 143 1300000, 1500000, 1800000, 2000000, 2500000, 2800000, 3000000, 3300000, 144 }; 145 146 static unsigned int mt6397_map_mode(unsigned int mode) 147 { 148 switch (mode) { 149 case MT6397_BUCK_MODE_AUTO: 150 return REGULATOR_MODE_NORMAL; 151 case MT6397_BUCK_MODE_FORCE_PWM: 152 return REGULATOR_MODE_FAST; 153 default: 154 return REGULATOR_MODE_INVALID; 155 } 156 } 157 158 static int mt6397_regulator_set_mode(struct regulator_dev *rdev, 159 unsigned int mode) 160 { 161 struct mt6397_regulator_info *info = rdev_get_drvdata(rdev); 162 int ret, val; 163 164 switch (mode) { 165 case REGULATOR_MODE_FAST: 166 val = MT6397_BUCK_MODE_FORCE_PWM; 167 break; 168 case REGULATOR_MODE_NORMAL: 169 val = MT6397_BUCK_MODE_AUTO; 170 break; 171 default: 172 ret = -EINVAL; 173 goto err_mode; 174 } 175 176 dev_dbg(&rdev->dev, "mt6397 buck set_mode %#x, %#x, %#x\n", 177 info->modeset_reg, info->modeset_mask, val); 178 179 val <<= ffs(info->modeset_mask) - 1; 180 181 ret = regmap_update_bits(rdev->regmap, info->modeset_reg, 182 info->modeset_mask, val); 183 err_mode: 184 if (ret != 0) { 185 dev_err(&rdev->dev, 186 "Failed to set mt6397 buck mode: %d\n", ret); 187 return ret; 188 } 189 190 return 0; 191 } 192 193 static unsigned int mt6397_regulator_get_mode(struct regulator_dev *rdev) 194 { 195 struct mt6397_regulator_info *info = rdev_get_drvdata(rdev); 196 int ret, regval; 197 198 ret = regmap_read(rdev->regmap, info->modeset_reg, ®val); 199 if (ret != 0) { 200 dev_err(&rdev->dev, 201 "Failed to get mt6397 buck mode: %d\n", ret); 202 return ret; 203 } 204 205 regval &= info->modeset_mask; 206 regval >>= ffs(info->modeset_mask) - 1; 207 208 switch (regval) { 209 case MT6397_BUCK_MODE_AUTO: 210 return REGULATOR_MODE_NORMAL; 211 case MT6397_BUCK_MODE_FORCE_PWM: 212 return REGULATOR_MODE_FAST; 213 default: 214 return -EINVAL; 215 } 216 } 217 218 static int mt6397_get_status(struct regulator_dev *rdev) 219 { 220 int ret; 221 u32 regval; 222 struct mt6397_regulator_info *info = rdev_get_drvdata(rdev); 223 224 ret = regmap_read(rdev->regmap, info->desc.enable_reg, ®val); 225 if (ret != 0) { 226 dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret); 227 return ret; 228 } 229 230 return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF; 231 } 232 233 static const struct regulator_ops mt6397_volt_range_ops = { 234 .list_voltage = regulator_list_voltage_linear_range, 235 .map_voltage = regulator_map_voltage_linear_range, 236 .set_voltage_sel = regulator_set_voltage_sel_regmap, 237 .get_voltage_sel = regulator_get_voltage_sel_regmap, 238 .set_voltage_time_sel = regulator_set_voltage_time_sel, 239 .enable = regulator_enable_regmap, 240 .disable = regulator_disable_regmap, 241 .is_enabled = regulator_is_enabled_regmap, 242 .get_status = mt6397_get_status, 243 .set_mode = mt6397_regulator_set_mode, 244 .get_mode = mt6397_regulator_get_mode, 245 }; 246 247 static const struct regulator_ops mt6397_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 .get_status = mt6397_get_status, 257 }; 258 259 static const struct regulator_ops mt6397_volt_fixed_ops = { 260 .list_voltage = regulator_list_voltage_linear, 261 .enable = regulator_enable_regmap, 262 .disable = regulator_disable_regmap, 263 .is_enabled = regulator_is_enabled_regmap, 264 .get_status = mt6397_get_status, 265 }; 266 267 /* The array is indexed by id(MT6397_ID_XXX) */ 268 static struct mt6397_regulator_info mt6397_regulators[] = { 269 MT6397_BUCK("buck_vpca15", VPCA15, 700000, 1493750, 6250, 270 buck_volt_range1, MT6397_VCA15_CON7, MT6397_VCA15_CON9, 0x7f, 271 MT6397_VCA15_CON10, MT6397_VCA15_CON5, MT6397_VCA15_CON2, 11), 272 MT6397_BUCK("buck_vpca7", VPCA7, 700000, 1493750, 6250, 273 buck_volt_range1, MT6397_VPCA7_CON7, MT6397_VPCA7_CON9, 0x7f, 274 MT6397_VPCA7_CON10, MT6397_VPCA7_CON5, MT6397_VPCA7_CON2, 8), 275 MT6397_BUCK("buck_vsramca15", VSRAMCA15, 700000, 1493750, 6250, 276 buck_volt_range1, MT6397_VSRMCA15_CON7, MT6397_VSRMCA15_CON9, 277 0x7f, MT6397_VSRMCA15_CON10, MT6397_VSRMCA15_CON5, 278 MT6397_VSRMCA15_CON2, 8), 279 MT6397_BUCK("buck_vsramca7", VSRAMCA7, 700000, 1493750, 6250, 280 buck_volt_range1, MT6397_VSRMCA7_CON7, MT6397_VSRMCA7_CON9, 281 0x7f, MT6397_VSRMCA7_CON10, MT6397_VSRMCA7_CON5, 282 MT6397_VSRMCA7_CON2, 8), 283 MT6397_BUCK("buck_vcore", VCORE, 700000, 1493750, 6250, 284 buck_volt_range1, MT6397_VCORE_CON7, MT6397_VCORE_CON9, 0x7f, 285 MT6397_VCORE_CON10, MT6397_VCORE_CON5, MT6397_VCORE_CON2, 8), 286 MT6397_BUCK("buck_vgpu", VGPU, 700000, 1493750, 6250, buck_volt_range1, 287 MT6397_VGPU_CON7, MT6397_VGPU_CON9, 0x7f, 288 MT6397_VGPU_CON10, MT6397_VGPU_CON5, MT6397_VGPU_CON2, 8), 289 MT6397_BUCK("buck_vdrm", VDRM, 800000, 1593750, 6250, buck_volt_range2, 290 MT6397_VDRM_CON7, MT6397_VDRM_CON9, 0x7f, 291 MT6397_VDRM_CON10, MT6397_VDRM_CON5, MT6397_VDRM_CON2, 8), 292 MT6397_BUCK("buck_vio18", VIO18, 1500000, 2120000, 20000, 293 buck_volt_range3, MT6397_VIO18_CON7, MT6397_VIO18_CON9, 0x1f, 294 MT6397_VIO18_CON10, MT6397_VIO18_CON5, MT6397_VIO18_CON2, 8), 295 MT6397_REG_FIXED("ldo_vtcxo", VTCXO, MT6397_ANALDO_CON0, 10, 2800000), 296 MT6397_REG_FIXED("ldo_va28", VA28, MT6397_ANALDO_CON1, 14, 2800000), 297 MT6397_LDO("ldo_vcama", VCAMA, ldo_volt_table1, 298 MT6397_ANALDO_CON2, 15, MT6397_ANALDO_CON6, 0xC0), 299 MT6397_REG_FIXED("ldo_vio28", VIO28, MT6397_DIGLDO_CON0, 14, 2800000), 300 MT6397_REG_FIXED("ldo_vusb", VUSB, MT6397_DIGLDO_CON1, 14, 3300000), 301 MT6397_LDO("ldo_vmc", VMC, ldo_volt_table2, 302 MT6397_DIGLDO_CON2, 12, MT6397_DIGLDO_CON29, 0x10), 303 MT6397_LDO("ldo_vmch", VMCH, ldo_volt_table3, 304 MT6397_DIGLDO_CON3, 14, MT6397_DIGLDO_CON17, 0x80), 305 MT6397_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table3, 306 MT6397_DIGLDO_CON4, 14, MT6397_DIGLDO_CON18, 0x10), 307 MT6397_LDO("ldo_vgp1", VGP1, ldo_volt_table4, 308 MT6397_DIGLDO_CON5, 15, MT6397_DIGLDO_CON19, 0xE0), 309 MT6397_LDO("ldo_vgp2", VGP2, ldo_volt_table5, 310 MT6397_DIGLDO_CON6, 15, MT6397_DIGLDO_CON20, 0xE0), 311 MT6397_LDO("ldo_vgp3", VGP3, ldo_volt_table5, 312 MT6397_DIGLDO_CON7, 15, MT6397_DIGLDO_CON21, 0xE0), 313 MT6397_LDO("ldo_vgp4", VGP4, ldo_volt_table5, 314 MT6397_DIGLDO_CON8, 15, MT6397_DIGLDO_CON22, 0xE0), 315 MT6397_LDO("ldo_vgp5", VGP5, ldo_volt_table6, 316 MT6397_DIGLDO_CON9, 15, MT6397_DIGLDO_CON23, 0xE0), 317 MT6397_LDO("ldo_vgp6", VGP6, ldo_volt_table5, 318 MT6397_DIGLDO_CON10, 15, MT6397_DIGLDO_CON33, 0xE0), 319 MT6397_LDO("ldo_vibr", VIBR, ldo_volt_table7, 320 MT6397_DIGLDO_CON24, 15, MT6397_DIGLDO_CON25, 0xE00), 321 }; 322 323 static int mt6397_set_buck_vosel_reg(struct platform_device *pdev) 324 { 325 struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent); 326 int i; 327 u32 regval; 328 329 for (i = 0; i < MT6397_MAX_REGULATOR; i++) { 330 if (mt6397_regulators[i].vselctrl_reg) { 331 if (regmap_read(mt6397->regmap, 332 mt6397_regulators[i].vselctrl_reg, 333 ®val) < 0) { 334 dev_err(&pdev->dev, 335 "Failed to read buck ctrl\n"); 336 return -EIO; 337 } 338 339 if (regval & mt6397_regulators[i].vselctrl_mask) { 340 mt6397_regulators[i].desc.vsel_reg = 341 mt6397_regulators[i].vselon_reg; 342 } 343 } 344 } 345 346 return 0; 347 } 348 349 static int mt6397_regulator_probe(struct platform_device *pdev) 350 { 351 struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent); 352 struct regulator_config config = {}; 353 struct regulator_dev *rdev; 354 int i; 355 u32 reg_value, version; 356 357 /* Query buck controller to select activated voltage register part */ 358 if (mt6397_set_buck_vosel_reg(pdev)) 359 return -EIO; 360 361 /* Read PMIC chip revision to update constraints and voltage table */ 362 if (regmap_read(mt6397->regmap, MT6397_CID, ®_value) < 0) { 363 dev_err(&pdev->dev, "Failed to read Chip ID\n"); 364 return -EIO; 365 } 366 dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value); 367 368 version = (reg_value & 0xFF); 369 switch (version) { 370 case MT6397_REGULATOR_ID91: 371 mt6397_regulators[MT6397_ID_VGP2].desc.volt_table = 372 ldo_volt_table5_v2; 373 break; 374 default: 375 break; 376 } 377 378 for (i = 0; i < MT6397_MAX_REGULATOR; i++) { 379 config.dev = &pdev->dev; 380 config.driver_data = &mt6397_regulators[i]; 381 config.regmap = mt6397->regmap; 382 rdev = devm_regulator_register(&pdev->dev, 383 &mt6397_regulators[i].desc, &config); 384 if (IS_ERR(rdev)) { 385 dev_err(&pdev->dev, "failed to register %s\n", 386 mt6397_regulators[i].desc.name); 387 return PTR_ERR(rdev); 388 } 389 } 390 391 return 0; 392 } 393 394 static const struct platform_device_id mt6397_platform_ids[] = { 395 {"mt6397-regulator", 0}, 396 { /* sentinel */ }, 397 }; 398 MODULE_DEVICE_TABLE(platform, mt6397_platform_ids); 399 400 static const struct of_device_id mt6397_of_match[] __maybe_unused = { 401 { .compatible = "mediatek,mt6397-regulator", }, 402 { /* sentinel */ }, 403 }; 404 MODULE_DEVICE_TABLE(of, mt6397_of_match); 405 406 static struct platform_driver mt6397_regulator_driver = { 407 .driver = { 408 .name = "mt6397-regulator", 409 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 410 .of_match_table = of_match_ptr(mt6397_of_match), 411 }, 412 .probe = mt6397_regulator_probe, 413 .id_table = mt6397_platform_ids, 414 }; 415 416 module_platform_driver(mt6397_regulator_driver); 417 418 MODULE_AUTHOR("Flora Fu <flora.fu@mediatek.com>"); 419 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6397 PMIC"); 420 MODULE_LICENSE("GPL"); 421