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 linear_range buck_volt_range1[] = { 106 REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250), 107 }; 108 109 static const struct linear_range buck_volt_range2[] = { 110 REGULATOR_LINEAR_RANGE(1400000, 0, 0x7f, 12500), 111 }; 112 113 static const struct 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, ®val); 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 ®val) < 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, ®_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"); 422