1 /* 2 * Regulator driver for TI TPS6586x 3 * 4 * Copyright (C) 2010 Compulab Ltd. 5 * Author: Mike Rapoport <mike@compulab.co.il> 6 * 7 * Based on da903x 8 * Copyright (C) 2006-2008 Marvell International Ltd. 9 * Copyright (C) 2008 Compulab Ltd. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/init.h> 19 #include <linux/err.h> 20 #include <linux/of.h> 21 #include <linux/slab.h> 22 #include <linux/platform_device.h> 23 #include <linux/regulator/driver.h> 24 #include <linux/regulator/machine.h> 25 #include <linux/regulator/of_regulator.h> 26 #include <linux/mfd/tps6586x.h> 27 28 /* supply control and voltage setting */ 29 #define TPS6586X_SUPPLYENA 0x10 30 #define TPS6586X_SUPPLYENB 0x11 31 #define TPS6586X_SUPPLYENC 0x12 32 #define TPS6586X_SUPPLYEND 0x13 33 #define TPS6586X_SUPPLYENE 0x14 34 #define TPS6586X_VCC1 0x20 35 #define TPS6586X_VCC2 0x21 36 #define TPS6586X_SM1V1 0x23 37 #define TPS6586X_SM1V2 0x24 38 #define TPS6586X_SM1SL 0x25 39 #define TPS6586X_SM0V1 0x26 40 #define TPS6586X_SM0V2 0x27 41 #define TPS6586X_SM0SL 0x28 42 #define TPS6586X_LDO2AV1 0x29 43 #define TPS6586X_LDO2AV2 0x2A 44 #define TPS6586X_LDO2BV1 0x2F 45 #define TPS6586X_LDO2BV2 0x30 46 #define TPS6586X_LDO4V1 0x32 47 #define TPS6586X_LDO4V2 0x33 48 49 /* converter settings */ 50 #define TPS6586X_SUPPLYV1 0x41 51 #define TPS6586X_SUPPLYV2 0x42 52 #define TPS6586X_SUPPLYV3 0x43 53 #define TPS6586X_SUPPLYV4 0x44 54 #define TPS6586X_SUPPLYV5 0x45 55 #define TPS6586X_SUPPLYV6 0x46 56 #define TPS6586X_SMODE1 0x47 57 #define TPS6586X_SMODE2 0x48 58 59 struct tps6586x_regulator { 60 struct regulator_desc desc; 61 62 int enable_bit[2]; 63 int enable_reg[2]; 64 }; 65 66 static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) 67 { 68 return rdev_get_dev(rdev)->parent; 69 } 70 71 static struct regulator_ops tps6586x_regulator_ops = { 72 .list_voltage = regulator_list_voltage_table, 73 .map_voltage = regulator_map_voltage_ascend, 74 .get_voltage_sel = regulator_get_voltage_sel_regmap, 75 .set_voltage_sel = regulator_set_voltage_sel_regmap, 76 77 .is_enabled = regulator_is_enabled_regmap, 78 .enable = regulator_enable_regmap, 79 .disable = regulator_disable_regmap, 80 }; 81 82 static struct regulator_ops tps6586x_sys_regulator_ops = { 83 }; 84 85 static const unsigned int tps6586x_ldo0_voltages[] = { 86 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, 87 }; 88 89 static const unsigned int tps6586x_ldo4_voltages[] = { 90 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000, 91 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000, 92 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000, 93 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000, 94 }; 95 96 #define tps658623_sm2_voltages tps6586x_ldo4_voltages 97 98 static const unsigned int tps6586x_ldo_voltages[] = { 99 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, 100 }; 101 102 static const unsigned int tps6586x_sm2_voltages[] = { 103 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000, 104 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000, 105 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000, 106 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000, 107 }; 108 109 static const unsigned int tps658643_sm2_voltages[] = { 110 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000, 1200000, 111 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000, 1400000, 112 1425000, 1450000, 1475000, 1500000, 1525000, 1550000, 1575000, 1600000, 113 1625000, 1650000, 1675000, 1700000, 1725000, 1750000, 1775000, 1800000, 114 }; 115 116 static const unsigned int tps6586x_dvm_voltages[] = { 117 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000, 118 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000, 119 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000, 120 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000, 121 }; 122 123 #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \ 124 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ 125 .desc = { \ 126 .supply_name = _pin_name, \ 127 .name = "REG-" #_id, \ 128 .ops = &tps6586x_regulator_ops, \ 129 .type = REGULATOR_VOLTAGE, \ 130 .id = TPS6586X_ID_##_id, \ 131 .n_voltages = ARRAY_SIZE(vdata##_voltages), \ 132 .volt_table = vdata##_voltages, \ 133 .owner = THIS_MODULE, \ 134 .enable_reg = TPS6586X_SUPPLY##ereg0, \ 135 .enable_mask = 1 << (ebit0), \ 136 .vsel_reg = TPS6586X_##vreg, \ 137 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \ 138 .apply_reg = (goreg), \ 139 .apply_bit = (gobit), \ 140 }, \ 141 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ 142 .enable_bit[0] = (ebit0), \ 143 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ 144 .enable_bit[1] = (ebit1), 145 146 #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \ 147 ereg0, ebit0, ereg1, ebit1) \ 148 { \ 149 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ 150 ereg0, ebit0, ereg1, ebit1, 0, 0) \ 151 } 152 153 #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \ 154 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ 155 { \ 156 TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ 157 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ 158 } 159 160 #define TPS6586X_SYS_REGULATOR() \ 161 { \ 162 .desc = { \ 163 .supply_name = "sys", \ 164 .name = "REG-SYS", \ 165 .ops = &tps6586x_sys_regulator_ops, \ 166 .type = REGULATOR_VOLTAGE, \ 167 .id = TPS6586X_ID_SYS, \ 168 .owner = THIS_MODULE, \ 169 }, \ 170 } 171 172 static struct tps6586x_regulator tps6586x_regulator[] = { 173 TPS6586X_SYS_REGULATOR(), 174 TPS6586X_LDO(LDO_0, "vinldo01", tps6586x_ldo0, SUPPLYV1, 5, 3, ENC, 0, 175 END, 0), 176 TPS6586X_LDO(LDO_3, "vinldo23", tps6586x_ldo, SUPPLYV4, 0, 3, ENC, 2, 177 END, 2), 178 TPS6586X_LDO(LDO_5, "REG-SYS", tps6586x_ldo, SUPPLYV6, 0, 3, ENE, 6, 179 ENE, 6), 180 TPS6586X_LDO(LDO_6, "vinldo678", tps6586x_ldo, SUPPLYV3, 0, 3, ENC, 4, 181 END, 4), 182 TPS6586X_LDO(LDO_7, "vinldo678", tps6586x_ldo, SUPPLYV3, 3, 3, ENC, 5, 183 END, 5), 184 TPS6586X_LDO(LDO_8, "vinldo678", tps6586x_ldo, SUPPLYV2, 5, 3, ENC, 6, 185 END, 6), 186 TPS6586X_LDO(LDO_9, "vinldo9", tps6586x_ldo, SUPPLYV6, 3, 3, ENE, 7, 187 ENE, 7), 188 TPS6586X_LDO(LDO_RTC, "REG-SYS", tps6586x_ldo, SUPPLYV4, 3, 3, V4, 7, 189 V4, 7), 190 TPS6586X_LDO(LDO_1, "vinldo01", tps6586x_dvm, SUPPLYV1, 0, 5, ENC, 1, 191 END, 1), 192 TPS6586X_LDO(SM_2, "vin-sm2", tps6586x_sm2, SUPPLYV2, 0, 5, ENC, 7, 193 END, 7), 194 195 TPS6586X_DVM(LDO_2, "vinldo23", tps6586x_dvm, LDO2BV1, 0, 5, ENA, 3, 196 ENB, 3, TPS6586X_VCC2, BIT(6)), 197 TPS6586X_DVM(LDO_4, "vinldo4", tps6586x_ldo4, LDO4V1, 0, 5, ENC, 3, 198 END, 3, TPS6586X_VCC1, BIT(6)), 199 TPS6586X_DVM(SM_0, "vin-sm0", tps6586x_dvm, SM0V1, 0, 5, ENA, 1, 200 ENB, 1, TPS6586X_VCC1, BIT(2)), 201 TPS6586X_DVM(SM_1, "vin-sm1", tps6586x_dvm, SM1V1, 0, 5, ENA, 0, 202 ENB, 0, TPS6586X_VCC1, BIT(0)), 203 }; 204 205 static struct tps6586x_regulator tps658623_regulator[] = { 206 TPS6586X_LDO(SM_2, "vin-sm2", tps658623_sm2, SUPPLYV2, 0, 5, ENC, 7, 207 END, 7), 208 }; 209 210 static struct tps6586x_regulator tps658643_regulator[] = { 211 TPS6586X_LDO(SM_2, "vin-sm2", tps658643_sm2, SUPPLYV2, 0, 5, ENC, 7, 212 END, 7), 213 }; 214 215 /* 216 * TPS6586X has 2 enable bits that are OR'ed to determine the actual 217 * regulator state. Clearing one of this bits allows switching 218 * regulator on and of with single register write. 219 */ 220 static inline int tps6586x_regulator_preinit(struct device *parent, 221 struct tps6586x_regulator *ri) 222 { 223 uint8_t val1, val2; 224 int ret; 225 226 if (ri->enable_reg[0] == ri->enable_reg[1] && 227 ri->enable_bit[0] == ri->enable_bit[1]) 228 return 0; 229 230 ret = tps6586x_read(parent, ri->enable_reg[0], &val1); 231 if (ret) 232 return ret; 233 234 ret = tps6586x_read(parent, ri->enable_reg[1], &val2); 235 if (ret) 236 return ret; 237 238 if (!(val2 & (1 << ri->enable_bit[1]))) 239 return 0; 240 241 /* 242 * The regulator is on, but it's enabled with the bit we don't 243 * want to use, so we switch the enable bits 244 */ 245 if (!(val1 & (1 << ri->enable_bit[0]))) { 246 ret = tps6586x_set_bits(parent, ri->enable_reg[0], 247 1 << ri->enable_bit[0]); 248 if (ret) 249 return ret; 250 } 251 252 return tps6586x_clr_bits(parent, ri->enable_reg[1], 253 1 << ri->enable_bit[1]); 254 } 255 256 static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev, 257 int id, struct regulator_init_data *p) 258 { 259 struct device *parent = pdev->dev.parent; 260 struct tps6586x_settings *setting = p->driver_data; 261 uint8_t reg; 262 263 if (setting == NULL) 264 return 0; 265 266 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET)) 267 return 0; 268 269 /* only SM0 and SM1 can have the slew rate settings */ 270 switch (id) { 271 case TPS6586X_ID_SM_0: 272 reg = TPS6586X_SM0SL; 273 break; 274 case TPS6586X_ID_SM_1: 275 reg = TPS6586X_SM1SL; 276 break; 277 default: 278 dev_err(&pdev->dev, "Only SM0/SM1 can set slew rate\n"); 279 return -EINVAL; 280 } 281 282 return tps6586x_write(parent, reg, 283 setting->slew_rate & TPS6586X_SLEW_RATE_MASK); 284 } 285 286 static struct tps6586x_regulator *find_regulator_info(int id, int version) 287 { 288 struct tps6586x_regulator *ri; 289 struct tps6586x_regulator *table = NULL; 290 int num; 291 int i; 292 293 switch (version) { 294 case TPS658623: 295 table = tps658623_regulator; 296 num = ARRAY_SIZE(tps658623_regulator); 297 break; 298 case TPS658643: 299 table = tps658643_regulator; 300 num = ARRAY_SIZE(tps658643_regulator); 301 break; 302 } 303 304 /* Search version specific table first */ 305 if (table) { 306 for (i = 0; i < num; i++) { 307 ri = &table[i]; 308 if (ri->desc.id == id) 309 return ri; 310 } 311 } 312 313 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { 314 ri = &tps6586x_regulator[i]; 315 if (ri->desc.id == id) 316 return ri; 317 } 318 return NULL; 319 } 320 321 #ifdef CONFIG_OF 322 static struct of_regulator_match tps6586x_matches[] = { 323 { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS }, 324 { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 }, 325 { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 }, 326 { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 }, 327 { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 }, 328 { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 }, 329 { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 }, 330 { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 }, 331 { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 }, 332 { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 }, 333 { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 }, 334 { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 }, 335 { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 }, 336 { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 }, 337 { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC }, 338 }; 339 340 static struct tps6586x_platform_data *tps6586x_parse_regulator_dt( 341 struct platform_device *pdev, 342 struct of_regulator_match **tps6586x_reg_matches) 343 { 344 const unsigned int num = ARRAY_SIZE(tps6586x_matches); 345 struct device_node *np = pdev->dev.parent->of_node; 346 struct device_node *regs; 347 const char *sys_rail = NULL; 348 unsigned int i; 349 struct tps6586x_platform_data *pdata; 350 int err; 351 352 regs = of_get_child_by_name(np, "regulators"); 353 if (!regs) { 354 dev_err(&pdev->dev, "regulator node not found\n"); 355 return NULL; 356 } 357 358 err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num); 359 of_node_put(regs); 360 if (err < 0) { 361 dev_err(&pdev->dev, "Regulator match failed, e %d\n", err); 362 return NULL; 363 } 364 365 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 366 if (!pdata) 367 return NULL; 368 369 for (i = 0; i < num; i++) { 370 int id; 371 if (!tps6586x_matches[i].init_data) 372 continue; 373 374 pdata->reg_init_data[i] = tps6586x_matches[i].init_data; 375 id = (int)tps6586x_matches[i].driver_data; 376 if (id == TPS6586X_ID_SYS) 377 sys_rail = pdata->reg_init_data[i]->constraints.name; 378 379 if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC)) 380 pdata->reg_init_data[i]->supply_regulator = sys_rail; 381 } 382 *tps6586x_reg_matches = tps6586x_matches; 383 return pdata; 384 } 385 #else 386 static struct tps6586x_platform_data *tps6586x_parse_regulator_dt( 387 struct platform_device *pdev, 388 struct of_regulator_match **tps6586x_reg_matches) 389 { 390 *tps6586x_reg_matches = NULL; 391 return NULL; 392 } 393 #endif 394 395 static int tps6586x_regulator_probe(struct platform_device *pdev) 396 { 397 struct tps6586x_regulator *ri = NULL; 398 struct regulator_config config = { }; 399 struct regulator_dev *rdev; 400 struct regulator_init_data *reg_data; 401 struct tps6586x_platform_data *pdata; 402 struct of_regulator_match *tps6586x_reg_matches = NULL; 403 int version; 404 int id; 405 int err; 406 407 dev_dbg(&pdev->dev, "Probing regulator\n"); 408 409 pdata = dev_get_platdata(pdev->dev.parent); 410 if ((!pdata) && (pdev->dev.parent->of_node)) 411 pdata = tps6586x_parse_regulator_dt(pdev, 412 &tps6586x_reg_matches); 413 414 if (!pdata) { 415 dev_err(&pdev->dev, "Platform data not available, exiting\n"); 416 return -ENODEV; 417 } 418 419 version = tps6586x_get_version(pdev->dev.parent); 420 421 for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) { 422 reg_data = pdata->reg_init_data[id]; 423 424 ri = find_regulator_info(id, version); 425 426 if (!ri) { 427 dev_err(&pdev->dev, "invalid regulator ID specified\n"); 428 return -EINVAL; 429 } 430 431 err = tps6586x_regulator_preinit(pdev->dev.parent, ri); 432 if (err) { 433 dev_err(&pdev->dev, 434 "regulator %d preinit failed, e %d\n", id, err); 435 return err; 436 } 437 438 config.dev = pdev->dev.parent; 439 config.init_data = reg_data; 440 config.driver_data = ri; 441 442 if (tps6586x_reg_matches) 443 config.of_node = tps6586x_reg_matches[id].of_node; 444 445 rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config); 446 if (IS_ERR(rdev)) { 447 dev_err(&pdev->dev, "failed to register regulator %s\n", 448 ri->desc.name); 449 return PTR_ERR(rdev); 450 } 451 452 if (reg_data) { 453 err = tps6586x_regulator_set_slew_rate(pdev, id, 454 reg_data); 455 if (err < 0) { 456 dev_err(&pdev->dev, 457 "Slew rate config failed, e %d\n", err); 458 return err; 459 } 460 } 461 } 462 463 platform_set_drvdata(pdev, rdev); 464 return 0; 465 } 466 467 static struct platform_driver tps6586x_regulator_driver = { 468 .driver = { 469 .name = "tps6586x-regulator", 470 .owner = THIS_MODULE, 471 }, 472 .probe = tps6586x_regulator_probe, 473 }; 474 475 static int __init tps6586x_regulator_init(void) 476 { 477 return platform_driver_register(&tps6586x_regulator_driver); 478 } 479 subsys_initcall(tps6586x_regulator_init); 480 481 static void __exit tps6586x_regulator_exit(void) 482 { 483 platform_driver_unregister(&tps6586x_regulator_driver); 484 } 485 module_exit(tps6586x_regulator_exit); 486 487 MODULE_LICENSE("GPL"); 488 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); 489 MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); 490 MODULE_ALIAS("platform:tps6586x-regulator"); 491