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 256 135 136 struct act8865 { 137 struct regmap *regmap; 138 int off_reg; 139 int off_mask; 140 }; 141 142 static const struct regmap_range act8600_reg_ranges[] = { 143 regmap_reg_range(0x00, 0x01), 144 regmap_reg_range(0x10, 0x10), 145 regmap_reg_range(0x12, 0x12), 146 regmap_reg_range(0x20, 0x20), 147 regmap_reg_range(0x22, 0x22), 148 regmap_reg_range(0x30, 0x30), 149 regmap_reg_range(0x32, 0x32), 150 regmap_reg_range(0x40, 0x41), 151 regmap_reg_range(0x50, 0x51), 152 regmap_reg_range(0x60, 0x61), 153 regmap_reg_range(0x70, 0x71), 154 regmap_reg_range(0x80, 0x81), 155 regmap_reg_range(0x91, 0x91), 156 regmap_reg_range(0xA1, 0xA1), 157 regmap_reg_range(0xA8, 0xAA), 158 regmap_reg_range(0xB0, 0xB0), 159 regmap_reg_range(0xB2, 0xB2), 160 regmap_reg_range(0xC1, 0xC1), 161 }; 162 163 static const struct regmap_range act8600_reg_ro_ranges[] = { 164 regmap_reg_range(0xAA, 0xAA), 165 regmap_reg_range(0xC1, 0xC1), 166 }; 167 168 static const struct regmap_range act8600_reg_volatile_ranges[] = { 169 regmap_reg_range(0x00, 0x01), 170 regmap_reg_range(0x12, 0x12), 171 regmap_reg_range(0x22, 0x22), 172 regmap_reg_range(0x32, 0x32), 173 regmap_reg_range(0x41, 0x41), 174 regmap_reg_range(0x51, 0x51), 175 regmap_reg_range(0x61, 0x61), 176 regmap_reg_range(0x71, 0x71), 177 regmap_reg_range(0x81, 0x81), 178 regmap_reg_range(0xA8, 0xA8), 179 regmap_reg_range(0xAA, 0xAA), 180 regmap_reg_range(0xB0, 0xB0), 181 regmap_reg_range(0xC1, 0xC1), 182 }; 183 184 static const struct regmap_access_table act8600_write_ranges_table = { 185 .yes_ranges = act8600_reg_ranges, 186 .n_yes_ranges = ARRAY_SIZE(act8600_reg_ranges), 187 .no_ranges = act8600_reg_ro_ranges, 188 .n_no_ranges = ARRAY_SIZE(act8600_reg_ro_ranges), 189 }; 190 191 static const struct regmap_access_table act8600_read_ranges_table = { 192 .yes_ranges = act8600_reg_ranges, 193 .n_yes_ranges = ARRAY_SIZE(act8600_reg_ranges), 194 }; 195 196 static const struct regmap_access_table act8600_volatile_ranges_table = { 197 .yes_ranges = act8600_reg_volatile_ranges, 198 .n_yes_ranges = ARRAY_SIZE(act8600_reg_volatile_ranges), 199 }; 200 201 static const struct regmap_config act8600_regmap_config = { 202 .reg_bits = 8, 203 .val_bits = 8, 204 .max_register = 0xFF, 205 .wr_table = &act8600_write_ranges_table, 206 .rd_table = &act8600_read_ranges_table, 207 .volatile_table = &act8600_volatile_ranges_table, 208 }; 209 210 static const struct regmap_config act8865_regmap_config = { 211 .reg_bits = 8, 212 .val_bits = 8, 213 }; 214 215 static const struct regulator_linear_range act8865_voltage_ranges[] = { 216 REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), 217 REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), 218 REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), 219 }; 220 221 static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = { 222 REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0), 223 REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000), 224 REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000), 225 REGULATOR_LINEAR_RANGE(19000000, 192, 247, 400000), 226 REGULATOR_LINEAR_RANGE(41400000, 248, 255, 0), 227 }; 228 229 static struct regulator_ops act8865_ops = { 230 .list_voltage = regulator_list_voltage_linear_range, 231 .map_voltage = regulator_map_voltage_linear_range, 232 .get_voltage_sel = regulator_get_voltage_sel_regmap, 233 .set_voltage_sel = regulator_set_voltage_sel_regmap, 234 .enable = regulator_enable_regmap, 235 .disable = regulator_disable_regmap, 236 .is_enabled = regulator_is_enabled_regmap, 237 }; 238 239 static struct regulator_ops act8865_ldo_ops = { 240 .enable = regulator_enable_regmap, 241 .disable = regulator_disable_regmap, 242 .is_enabled = regulator_is_enabled_regmap, 243 }; 244 245 #define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply) \ 246 [_family##_ID_##_id] = { \ 247 .name = _name, \ 248 .of_match = of_match_ptr(_name), \ 249 .regulators_node = of_match_ptr("regulators"), \ 250 .supply_name = _supply, \ 251 .id = _family##_ID_##_id, \ 252 .type = REGULATOR_VOLTAGE, \ 253 .ops = &act8865_ops, \ 254 .n_voltages = ACT8865_VOLTAGE_NUM, \ 255 .linear_ranges = act8865_voltage_ranges, \ 256 .n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \ 257 .vsel_reg = _family##_##_id##_##_vsel_reg, \ 258 .vsel_mask = ACT8865_VSEL_MASK, \ 259 .enable_reg = _family##_##_id##_CTRL, \ 260 .enable_mask = ACT8865_ENA, \ 261 .owner = THIS_MODULE, \ 262 } 263 264 static const struct regulator_desc act8600_regulators[] = { 265 ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"), 266 ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"), 267 ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"), 268 { 269 .name = "SUDCDC_REG4", 270 .of_match = of_match_ptr("SUDCDC_REG4"), 271 .regulators_node = of_match_ptr("regulators"), 272 .id = ACT8600_ID_SUDCDC4, 273 .ops = &act8865_ops, 274 .type = REGULATOR_VOLTAGE, 275 .n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM, 276 .linear_ranges = act8600_sudcdc_voltage_ranges, 277 .n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges), 278 .vsel_reg = ACT8600_SUDCDC4_VSET, 279 .vsel_mask = ACT8600_SUDCDC_VSEL_MASK, 280 .enable_reg = ACT8600_SUDCDC4_CTRL, 281 .enable_mask = ACT8865_ENA, 282 .owner = THIS_MODULE, 283 }, 284 ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"), 285 ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"), 286 ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"), 287 ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"), 288 { 289 .name = "LDO_REG9", 290 .of_match = of_match_ptr("LDO_REG9"), 291 .regulators_node = of_match_ptr("regulators"), 292 .id = ACT8600_ID_LDO9, 293 .ops = &act8865_ldo_ops, 294 .type = REGULATOR_VOLTAGE, 295 .n_voltages = 1, 296 .fixed_uV = 3300000, 297 .enable_reg = ACT8600_LDO910_CTRL, 298 .enable_mask = ACT8865_ENA, 299 .owner = THIS_MODULE, 300 }, 301 { 302 .name = "LDO_REG10", 303 .of_match = of_match_ptr("LDO_REG10"), 304 .regulators_node = of_match_ptr("regulators"), 305 .id = ACT8600_ID_LDO10, 306 .ops = &act8865_ldo_ops, 307 .type = REGULATOR_VOLTAGE, 308 .n_voltages = 1, 309 .fixed_uV = 1200000, 310 .enable_reg = ACT8600_LDO910_CTRL, 311 .enable_mask = ACT8600_LDO10_ENA, 312 .owner = THIS_MODULE, 313 }, 314 }; 315 316 static const struct regulator_desc act8846_regulators[] = { 317 ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"), 318 ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"), 319 ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"), 320 ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"), 321 ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"), 322 ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"), 323 ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"), 324 ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"), 325 ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"), 326 ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"), 327 ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"), 328 ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"), 329 }; 330 331 static const struct regulator_desc act8865_regulators[] = { 332 ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"), 333 ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"), 334 ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"), 335 ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"), 336 ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"), 337 ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"), 338 ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"), 339 }; 340 341 static const struct regulator_desc act8865_alt_regulators[] = { 342 ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET2, "vp1"), 343 ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET2, "vp2"), 344 ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET2, "vp3"), 345 ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"), 346 ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"), 347 ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"), 348 ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"), 349 }; 350 351 #ifdef CONFIG_OF 352 static const struct of_device_id act8865_dt_ids[] = { 353 { .compatible = "active-semi,act8600", .data = (void *)ACT8600 }, 354 { .compatible = "active-semi,act8846", .data = (void *)ACT8846 }, 355 { .compatible = "active-semi,act8865", .data = (void *)ACT8865 }, 356 { } 357 }; 358 MODULE_DEVICE_TABLE(of, act8865_dt_ids); 359 #endif 360 361 static struct act8865_regulator_data *act8865_get_regulator_data( 362 int id, struct act8865_platform_data *pdata) 363 { 364 int i; 365 366 for (i = 0; i < pdata->num_regulators; i++) { 367 if (pdata->regulators[i].id == id) 368 return &pdata->regulators[i]; 369 } 370 371 return NULL; 372 } 373 374 static struct i2c_client *act8865_i2c_client; 375 static void act8865_power_off(void) 376 { 377 struct act8865 *act8865; 378 379 act8865 = i2c_get_clientdata(act8865_i2c_client); 380 regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask); 381 while (1); 382 } 383 384 static int act8865_pmic_probe(struct i2c_client *client, 385 const struct i2c_device_id *i2c_id) 386 { 387 const struct regulator_desc *regulators; 388 struct act8865_platform_data *pdata = NULL; 389 struct device *dev = &client->dev; 390 int i, ret, num_regulators; 391 struct act8865 *act8865; 392 const struct regmap_config *regmap_config; 393 unsigned long type; 394 int off_reg, off_mask; 395 int voltage_select = 0; 396 397 if (dev->of_node) { 398 const struct of_device_id *id; 399 400 id = of_match_device(of_match_ptr(act8865_dt_ids), dev); 401 if (!id) 402 return -ENODEV; 403 404 type = (unsigned long) id->data; 405 406 voltage_select = !!of_get_property(dev->of_node, 407 "active-semi,vsel-high", 408 NULL); 409 } else { 410 type = i2c_id->driver_data; 411 pdata = dev_get_platdata(dev); 412 } 413 414 switch (type) { 415 case ACT8600: 416 regulators = act8600_regulators; 417 num_regulators = ARRAY_SIZE(act8600_regulators); 418 regmap_config = &act8600_regmap_config; 419 off_reg = -1; 420 off_mask = -1; 421 break; 422 case ACT8846: 423 regulators = act8846_regulators; 424 num_regulators = ARRAY_SIZE(act8846_regulators); 425 regmap_config = &act8865_regmap_config; 426 off_reg = ACT8846_GLB_OFF_CTRL; 427 off_mask = ACT8846_OFF_SYSMASK; 428 break; 429 case ACT8865: 430 if (voltage_select) { 431 regulators = act8865_alt_regulators; 432 num_regulators = ARRAY_SIZE(act8865_alt_regulators); 433 } else { 434 regulators = act8865_regulators; 435 num_regulators = ARRAY_SIZE(act8865_regulators); 436 } 437 regmap_config = &act8865_regmap_config; 438 off_reg = ACT8865_SYS_CTRL; 439 off_mask = ACT8865_MSTROFF; 440 break; 441 default: 442 dev_err(dev, "invalid device id %lu\n", type); 443 return -EINVAL; 444 } 445 446 act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL); 447 if (!act8865) 448 return -ENOMEM; 449 450 act8865->regmap = devm_regmap_init_i2c(client, regmap_config); 451 if (IS_ERR(act8865->regmap)) { 452 ret = PTR_ERR(act8865->regmap); 453 dev_err(dev, "Failed to allocate register map: %d\n", ret); 454 return ret; 455 } 456 457 if (of_device_is_system_power_controller(dev->of_node)) { 458 if (!pm_power_off && (off_reg > 0)) { 459 act8865_i2c_client = client; 460 act8865->off_reg = off_reg; 461 act8865->off_mask = off_mask; 462 pm_power_off = act8865_power_off; 463 } else { 464 dev_err(dev, "Failed to set poweroff capability, already defined\n"); 465 } 466 } 467 468 /* Finally register devices */ 469 for (i = 0; i < num_regulators; i++) { 470 const struct regulator_desc *desc = ®ulators[i]; 471 struct regulator_config config = { }; 472 struct regulator_dev *rdev; 473 474 config.dev = dev; 475 config.driver_data = act8865; 476 config.regmap = act8865->regmap; 477 478 if (pdata) { 479 struct act8865_regulator_data *rdata; 480 481 rdata = act8865_get_regulator_data(desc->id, pdata); 482 if (rdata) { 483 config.init_data = rdata->init_data; 484 config.of_node = rdata->of_node; 485 } 486 } 487 488 rdev = devm_regulator_register(dev, desc, &config); 489 if (IS_ERR(rdev)) { 490 dev_err(dev, "failed to register %s\n", desc->name); 491 return PTR_ERR(rdev); 492 } 493 } 494 495 i2c_set_clientdata(client, act8865); 496 497 return 0; 498 } 499 500 static const struct i2c_device_id act8865_ids[] = { 501 { .name = "act8600", .driver_data = ACT8600 }, 502 { .name = "act8846", .driver_data = ACT8846 }, 503 { .name = "act8865", .driver_data = ACT8865 }, 504 { }, 505 }; 506 MODULE_DEVICE_TABLE(i2c, act8865_ids); 507 508 static struct i2c_driver act8865_pmic_driver = { 509 .driver = { 510 .name = "act8865", 511 }, 512 .probe = act8865_pmic_probe, 513 .id_table = act8865_ids, 514 }; 515 516 module_i2c_driver(act8865_pmic_driver); 517 518 MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver"); 519 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); 520 MODULE_LICENSE("GPL v2"); 521