1 /* 2 * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs 3 * 4 * http://www.active-semi.com/products/power-management-units/act88xx/ 5 * 6 * Copyright (C) 2013 Atmel Corporation 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <linux/i2c.h> 22 #include <linux/err.h> 23 #include <linux/platform_device.h> 24 #include <linux/regulator/driver.h> 25 #include <linux/regulator/act8865.h> 26 #include <linux/of.h> 27 #include <linux/of_device.h> 28 #include <linux/regulator/of_regulator.h> 29 #include <linux/regmap.h> 30 31 /* 32 * ACT8600 Global Register Map. 33 */ 34 #define ACT8600_SYS_MODE 0x00 35 #define ACT8600_SYS_CTRL 0x01 36 #define ACT8600_DCDC1_VSET 0x10 37 #define ACT8600_DCDC1_CTRL 0x12 38 #define ACT8600_DCDC2_VSET 0x20 39 #define ACT8600_DCDC2_CTRL 0x22 40 #define ACT8600_DCDC3_VSET 0x30 41 #define ACT8600_DCDC3_CTRL 0x32 42 #define ACT8600_SUDCDC4_VSET 0x40 43 #define ACT8600_SUDCDC4_CTRL 0x41 44 #define ACT8600_LDO5_VSET 0x50 45 #define ACT8600_LDO5_CTRL 0x51 46 #define ACT8600_LDO6_VSET 0x60 47 #define ACT8600_LDO6_CTRL 0x61 48 #define ACT8600_LDO7_VSET 0x70 49 #define ACT8600_LDO7_CTRL 0x71 50 #define ACT8600_LDO8_VSET 0x80 51 #define ACT8600_LDO8_CTRL 0x81 52 #define ACT8600_LDO910_CTRL 0x91 53 #define ACT8600_APCH0 0xA1 54 #define ACT8600_APCH1 0xA8 55 #define ACT8600_APCH2 0xA9 56 #define ACT8600_APCH_STAT 0xAA 57 #define ACT8600_OTG0 0xB0 58 #define ACT8600_OTG1 0xB2 59 60 /* 61 * ACT8846 Global Register Map. 62 */ 63 #define ACT8846_SYS0 0x00 64 #define ACT8846_SYS1 0x01 65 #define ACT8846_REG1_VSET 0x10 66 #define ACT8846_REG1_CTRL 0x12 67 #define ACT8846_REG2_VSET0 0x20 68 #define ACT8846_REG2_VSET1 0x21 69 #define ACT8846_REG2_CTRL 0x22 70 #define ACT8846_REG3_VSET0 0x30 71 #define ACT8846_REG3_VSET1 0x31 72 #define ACT8846_REG3_CTRL 0x32 73 #define ACT8846_REG4_VSET0 0x40 74 #define ACT8846_REG4_VSET1 0x41 75 #define ACT8846_REG4_CTRL 0x42 76 #define ACT8846_REG5_VSET 0x50 77 #define ACT8846_REG5_CTRL 0x51 78 #define ACT8846_REG6_VSET 0x58 79 #define ACT8846_REG6_CTRL 0x59 80 #define ACT8846_REG7_VSET 0x60 81 #define ACT8846_REG7_CTRL 0x61 82 #define ACT8846_REG8_VSET 0x68 83 #define ACT8846_REG8_CTRL 0x69 84 #define ACT8846_REG9_VSET 0x70 85 #define ACT8846_REG9_CTRL 0x71 86 #define ACT8846_REG10_VSET 0x80 87 #define ACT8846_REG10_CTRL 0x81 88 #define ACT8846_REG11_VSET 0x90 89 #define ACT8846_REG11_CTRL 0x91 90 #define ACT8846_REG12_VSET 0xa0 91 #define ACT8846_REG12_CTRL 0xa1 92 #define ACT8846_REG13_CTRL 0xb1 93 #define ACT8846_GLB_OFF_CTRL 0xc3 94 #define ACT8846_OFF_SYSMASK 0x18 95 96 /* 97 * ACT8865 Global Register Map. 98 */ 99 #define ACT8865_SYS_MODE 0x00 100 #define ACT8865_SYS_CTRL 0x01 101 #define ACT8865_DCDC1_VSET1 0x20 102 #define ACT8865_DCDC1_VSET2 0x21 103 #define ACT8865_DCDC1_CTRL 0x22 104 #define ACT8865_DCDC2_VSET1 0x30 105 #define ACT8865_DCDC2_VSET2 0x31 106 #define ACT8865_DCDC2_CTRL 0x32 107 #define ACT8865_DCDC3_VSET1 0x40 108 #define ACT8865_DCDC3_VSET2 0x41 109 #define ACT8865_DCDC3_CTRL 0x42 110 #define ACT8865_LDO1_VSET 0x50 111 #define ACT8865_LDO1_CTRL 0x51 112 #define ACT8865_LDO2_VSET 0x54 113 #define ACT8865_LDO2_CTRL 0x55 114 #define ACT8865_LDO3_VSET 0x60 115 #define ACT8865_LDO3_CTRL 0x61 116 #define ACT8865_LDO4_VSET 0x64 117 #define ACT8865_LDO4_CTRL 0x65 118 #define ACT8865_MSTROFF 0x20 119 120 /* 121 * Field Definitions. 122 */ 123 #define ACT8865_ENA 0x80 /* ON - [7] */ 124 #define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */ 125 126 127 #define ACT8600_LDO10_ENA 0x40 /* ON - [6] */ 128 #define ACT8600_SUDCDC_VSEL_MASK 0xFF /* SUDCDC VSET - [7:0] */ 129 130 /* 131 * ACT8865 voltage number 132 */ 133 #define ACT8865_VOLTAGE_NUM 64 134 #define ACT8600_SUDCDC_VOLTAGE_NUM 255 135 136 struct act8865 { 137 struct regmap *regmap; 138 int off_reg; 139 int off_mask; 140 }; 141 142 static const struct regmap_config act8865_regmap_config = { 143 .reg_bits = 8, 144 .val_bits = 8, 145 }; 146 147 static const struct regulator_linear_range act8865_voltage_ranges[] = { 148 REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), 149 REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), 150 REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), 151 }; 152 153 static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = { 154 REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0), 155 REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000), 156 REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000), 157 REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000), 158 }; 159 160 static struct regulator_ops act8865_ops = { 161 .list_voltage = regulator_list_voltage_linear_range, 162 .map_voltage = regulator_map_voltage_linear_range, 163 .get_voltage_sel = regulator_get_voltage_sel_regmap, 164 .set_voltage_sel = regulator_set_voltage_sel_regmap, 165 .enable = regulator_enable_regmap, 166 .disable = regulator_disable_regmap, 167 .is_enabled = regulator_is_enabled_regmap, 168 }; 169 170 static struct regulator_ops act8865_ldo_ops = { 171 .enable = regulator_enable_regmap, 172 .disable = regulator_disable_regmap, 173 .is_enabled = regulator_is_enabled_regmap, 174 }; 175 176 #define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply) \ 177 [_family##_ID_##_id] = { \ 178 .name = _name, \ 179 .supply_name = _supply, \ 180 .id = _family##_ID_##_id, \ 181 .type = REGULATOR_VOLTAGE, \ 182 .ops = &act8865_ops, \ 183 .n_voltages = ACT8865_VOLTAGE_NUM, \ 184 .linear_ranges = act8865_voltage_ranges, \ 185 .n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \ 186 .vsel_reg = _family##_##_id##_##_vsel_reg, \ 187 .vsel_mask = ACT8865_VSEL_MASK, \ 188 .enable_reg = _family##_##_id##_CTRL, \ 189 .enable_mask = ACT8865_ENA, \ 190 .owner = THIS_MODULE, \ 191 } 192 193 static const struct regulator_desc act8600_regulators[] = { 194 ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"), 195 ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"), 196 ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"), 197 { 198 .name = "SUDCDC_REG4", 199 .id = ACT8600_ID_SUDCDC4, 200 .ops = &act8865_ops, 201 .type = REGULATOR_VOLTAGE, 202 .n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM, 203 .linear_ranges = act8600_sudcdc_voltage_ranges, 204 .n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges), 205 .vsel_reg = ACT8600_SUDCDC4_VSET, 206 .vsel_mask = ACT8600_SUDCDC_VSEL_MASK, 207 .enable_reg = ACT8600_SUDCDC4_CTRL, 208 .enable_mask = ACT8865_ENA, 209 .owner = THIS_MODULE, 210 }, 211 ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"), 212 ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"), 213 ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"), 214 ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"), 215 { 216 .name = "LDO_REG9", 217 .id = ACT8600_ID_LDO9, 218 .ops = &act8865_ldo_ops, 219 .type = REGULATOR_VOLTAGE, 220 .n_voltages = 1, 221 .fixed_uV = 1800000, 222 .enable_reg = ACT8600_LDO910_CTRL, 223 .enable_mask = ACT8865_ENA, 224 .owner = THIS_MODULE, 225 }, 226 { 227 .name = "LDO_REG10", 228 .id = ACT8600_ID_LDO10, 229 .ops = &act8865_ldo_ops, 230 .type = REGULATOR_VOLTAGE, 231 .n_voltages = 1, 232 .fixed_uV = 1200000, 233 .enable_reg = ACT8600_LDO910_CTRL, 234 .enable_mask = ACT8600_LDO10_ENA, 235 .owner = THIS_MODULE, 236 }, 237 }; 238 239 static const struct regulator_desc act8846_regulators[] = { 240 ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"), 241 ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"), 242 ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"), 243 ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"), 244 ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"), 245 ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"), 246 ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"), 247 ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"), 248 ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"), 249 ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"), 250 ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"), 251 ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"), 252 }; 253 254 static const struct regulator_desc act8865_regulators[] = { 255 ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"), 256 ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"), 257 ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"), 258 ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"), 259 ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"), 260 ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"), 261 ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"), 262 }; 263 264 #ifdef CONFIG_OF 265 static const struct of_device_id act8865_dt_ids[] = { 266 { .compatible = "active-semi,act8600", .data = (void *)ACT8600 }, 267 { .compatible = "active-semi,act8846", .data = (void *)ACT8846 }, 268 { .compatible = "active-semi,act8865", .data = (void *)ACT8865 }, 269 { } 270 }; 271 MODULE_DEVICE_TABLE(of, act8865_dt_ids); 272 273 static struct of_regulator_match act8846_matches[] = { 274 [ACT8846_ID_REG1] = { .name = "REG1" }, 275 [ACT8846_ID_REG2] = { .name = "REG2" }, 276 [ACT8846_ID_REG3] = { .name = "REG3" }, 277 [ACT8846_ID_REG4] = { .name = "REG4" }, 278 [ACT8846_ID_REG5] = { .name = "REG5" }, 279 [ACT8846_ID_REG6] = { .name = "REG6" }, 280 [ACT8846_ID_REG7] = { .name = "REG7" }, 281 [ACT8846_ID_REG8] = { .name = "REG8" }, 282 [ACT8846_ID_REG9] = { .name = "REG9" }, 283 [ACT8846_ID_REG10] = { .name = "REG10" }, 284 [ACT8846_ID_REG11] = { .name = "REG11" }, 285 [ACT8846_ID_REG12] = { .name = "REG12" }, 286 }; 287 288 static struct of_regulator_match act8865_matches[] = { 289 [ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"}, 290 [ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"}, 291 [ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"}, 292 [ACT8865_ID_LDO1] = { .name = "LDO_REG1"}, 293 [ACT8865_ID_LDO2] = { .name = "LDO_REG2"}, 294 [ACT8865_ID_LDO3] = { .name = "LDO_REG3"}, 295 [ACT8865_ID_LDO4] = { .name = "LDO_REG4"}, 296 }; 297 298 static struct of_regulator_match act8600_matches[] = { 299 [ACT8600_ID_DCDC1] = { .name = "DCDC_REG1"}, 300 [ACT8600_ID_DCDC2] = { .name = "DCDC_REG2"}, 301 [ACT8600_ID_DCDC3] = { .name = "DCDC_REG3"}, 302 [ACT8600_ID_SUDCDC4] = { .name = "SUDCDC_REG4"}, 303 [ACT8600_ID_LDO5] = { .name = "LDO_REG5"}, 304 [ACT8600_ID_LDO6] = { .name = "LDO_REG6"}, 305 [ACT8600_ID_LDO7] = { .name = "LDO_REG7"}, 306 [ACT8600_ID_LDO8] = { .name = "LDO_REG8"}, 307 [ACT8600_ID_LDO9] = { .name = "LDO_REG9"}, 308 [ACT8600_ID_LDO10] = { .name = "LDO_REG10"}, 309 }; 310 311 static int act8865_pdata_from_dt(struct device *dev, 312 struct device_node **of_node, 313 struct act8865_platform_data *pdata, 314 unsigned long type) 315 { 316 int matched, i, num_matches; 317 struct device_node *np; 318 struct act8865_regulator_data *regulator; 319 struct of_regulator_match *matches; 320 321 np = of_get_child_by_name(dev->of_node, "regulators"); 322 if (!np) { 323 dev_err(dev, "missing 'regulators' subnode in DT\n"); 324 return -EINVAL; 325 } 326 327 switch (type) { 328 case ACT8600: 329 matches = act8600_matches; 330 num_matches = ARRAY_SIZE(act8600_matches); 331 break; 332 case ACT8846: 333 matches = act8846_matches; 334 num_matches = ARRAY_SIZE(act8846_matches); 335 break; 336 case ACT8865: 337 matches = act8865_matches; 338 num_matches = ARRAY_SIZE(act8865_matches); 339 break; 340 default: 341 dev_err(dev, "invalid device id %lu\n", type); 342 return -EINVAL; 343 } 344 345 matched = of_regulator_match(dev, np, matches, num_matches); 346 of_node_put(np); 347 if (matched <= 0) 348 return matched; 349 350 pdata->regulators = devm_kzalloc(dev, 351 sizeof(struct act8865_regulator_data) * 352 num_matches, GFP_KERNEL); 353 if (!pdata->regulators) 354 return -ENOMEM; 355 356 pdata->num_regulators = num_matches; 357 regulator = pdata->regulators; 358 359 for (i = 0; i < num_matches; i++) { 360 regulator->id = i; 361 regulator->name = matches[i].name; 362 regulator->platform_data = matches[i].init_data; 363 of_node[i] = matches[i].of_node; 364 regulator++; 365 } 366 367 return 0; 368 } 369 #else 370 static inline int act8865_pdata_from_dt(struct device *dev, 371 struct device_node **of_node, 372 struct act8865_platform_data *pdata, 373 unsigned long type) 374 { 375 return 0; 376 } 377 #endif 378 379 static struct regulator_init_data 380 *act8865_get_init_data(int id, struct act8865_platform_data *pdata) 381 { 382 int i; 383 384 if (!pdata) 385 return NULL; 386 387 for (i = 0; i < pdata->num_regulators; i++) { 388 if (pdata->regulators[i].id == id) 389 return pdata->regulators[i].platform_data; 390 } 391 392 return NULL; 393 } 394 395 static struct i2c_client *act8865_i2c_client; 396 static void act8865_power_off(void) 397 { 398 struct act8865 *act8865; 399 400 act8865 = i2c_get_clientdata(act8865_i2c_client); 401 regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask); 402 while (1); 403 } 404 405 static int act8865_pmic_probe(struct i2c_client *client, 406 const struct i2c_device_id *i2c_id) 407 { 408 static const struct regulator_desc *regulators; 409 struct act8865_platform_data pdata_of, *pdata; 410 struct device *dev = &client->dev; 411 struct device_node **of_node; 412 int i, ret, num_regulators; 413 struct act8865 *act8865; 414 unsigned long type; 415 int off_reg, off_mask; 416 417 pdata = dev_get_platdata(dev); 418 419 if (dev->of_node && !pdata) { 420 const struct of_device_id *id; 421 422 id = of_match_device(of_match_ptr(act8865_dt_ids), dev); 423 if (!id) 424 return -ENODEV; 425 426 type = (unsigned long) id->data; 427 } else { 428 type = i2c_id->driver_data; 429 } 430 431 switch (type) { 432 case ACT8600: 433 regulators = act8600_regulators; 434 num_regulators = ARRAY_SIZE(act8600_regulators); 435 off_reg = -1; 436 off_mask = -1; 437 break; 438 case ACT8846: 439 regulators = act8846_regulators; 440 num_regulators = ARRAY_SIZE(act8846_regulators); 441 off_reg = ACT8846_GLB_OFF_CTRL; 442 off_mask = ACT8846_OFF_SYSMASK; 443 break; 444 case ACT8865: 445 regulators = act8865_regulators; 446 num_regulators = ARRAY_SIZE(act8865_regulators); 447 off_reg = ACT8865_SYS_CTRL; 448 off_mask = ACT8865_MSTROFF; 449 break; 450 default: 451 dev_err(dev, "invalid device id %lu\n", type); 452 return -EINVAL; 453 } 454 455 of_node = devm_kzalloc(dev, sizeof(struct device_node *) * 456 num_regulators, GFP_KERNEL); 457 if (!of_node) 458 return -ENOMEM; 459 460 if (dev->of_node && !pdata) { 461 ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type); 462 if (ret < 0) 463 return ret; 464 465 pdata = &pdata_of; 466 } 467 468 if (pdata->num_regulators > num_regulators) { 469 dev_err(dev, "too many regulators: %d\n", 470 pdata->num_regulators); 471 return -EINVAL; 472 } 473 474 act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL); 475 if (!act8865) 476 return -ENOMEM; 477 478 act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config); 479 if (IS_ERR(act8865->regmap)) { 480 ret = PTR_ERR(act8865->regmap); 481 dev_err(&client->dev, "Failed to allocate register map: %d\n", 482 ret); 483 return ret; 484 } 485 486 if (of_device_is_system_power_controller(dev->of_node)) { 487 if (!pm_power_off && (off_reg > 0)) { 488 act8865_i2c_client = client; 489 act8865->off_reg = off_reg; 490 act8865->off_mask = off_mask; 491 pm_power_off = act8865_power_off; 492 } else { 493 dev_err(dev, "Failed to set poweroff capability, already defined\n"); 494 } 495 } 496 497 /* Finally register devices */ 498 for (i = 0; i < num_regulators; i++) { 499 const struct regulator_desc *desc = ®ulators[i]; 500 struct regulator_config config = { }; 501 struct regulator_dev *rdev; 502 503 config.dev = dev; 504 config.init_data = act8865_get_init_data(desc->id, pdata); 505 config.of_node = of_node[i]; 506 config.driver_data = act8865; 507 config.regmap = act8865->regmap; 508 509 rdev = devm_regulator_register(&client->dev, desc, &config); 510 if (IS_ERR(rdev)) { 511 dev_err(dev, "failed to register %s\n", desc->name); 512 return PTR_ERR(rdev); 513 } 514 } 515 516 i2c_set_clientdata(client, act8865); 517 devm_kfree(dev, of_node); 518 519 return 0; 520 } 521 522 static const struct i2c_device_id act8865_ids[] = { 523 { .name = "act8600", .driver_data = ACT8600 }, 524 { .name = "act8846", .driver_data = ACT8846 }, 525 { .name = "act8865", .driver_data = ACT8865 }, 526 { }, 527 }; 528 MODULE_DEVICE_TABLE(i2c, act8865_ids); 529 530 static struct i2c_driver act8865_pmic_driver = { 531 .driver = { 532 .name = "act8865", 533 }, 534 .probe = act8865_pmic_probe, 535 .id_table = act8865_ids, 536 }; 537 538 module_i2c_driver(act8865_pmic_driver); 539 540 MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver"); 541 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); 542 MODULE_LICENSE("GPL v2"); 543