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 59struct tps6586x_regulator { 60 struct regulator_desc desc; 61 62 int enable_bit[2]; 63 int enable_reg[2]; 64}; 65 66static struct regulator_ops tps6586x_rw_regulator_ops = { 67 .list_voltage = regulator_list_voltage_table, 68 .map_voltage = regulator_map_voltage_ascend, 69 .get_voltage_sel = regulator_get_voltage_sel_regmap, 70 .set_voltage_sel = regulator_set_voltage_sel_regmap, 71 72 .is_enabled = regulator_is_enabled_regmap, 73 .enable = regulator_enable_regmap, 74 .disable = regulator_disable_regmap, 75}; 76 77static struct regulator_ops tps6586x_rw_linear_regulator_ops = { 78 .list_voltage = regulator_list_voltage_linear, 79 .get_voltage_sel = regulator_get_voltage_sel_regmap, 80 .set_voltage_sel = regulator_set_voltage_sel_regmap, 81 82 .is_enabled = regulator_is_enabled_regmap, 83 .enable = regulator_enable_regmap, 84 .disable = regulator_disable_regmap, 85}; 86 87static struct regulator_ops tps6586x_ro_regulator_ops = { 88 .list_voltage = regulator_list_voltage_table, 89 .map_voltage = regulator_map_voltage_ascend, 90 .get_voltage_sel = regulator_get_voltage_sel_regmap, 91 92 .is_enabled = regulator_is_enabled_regmap, 93 .enable = regulator_enable_regmap, 94 .disable = regulator_disable_regmap, 95}; 96 97static struct regulator_ops tps6586x_sys_regulator_ops = { 98}; 99 100static const unsigned int tps6586x_ldo0_voltages[] = { 101 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, 102}; 103 104static const unsigned int tps6586x_ldo_voltages[] = { 105 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, 106}; 107 108static const unsigned int tps658640_rtc_voltages[] = { 109 2500000, 2850000, 3100000, 3300000, 110}; 111 112#define TPS6586X_REGULATOR(_id, _ops, _pin_name, vdata, vreg, shift, nbits, \ 113 ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ 114 .desc = { \ 115 .supply_name = _pin_name, \ 116 .name = "REG-" #_id, \ 117 .ops = &tps6586x_## _ops ## _regulator_ops, \ 118 .type = REGULATOR_VOLTAGE, \ 119 .id = TPS6586X_ID_##_id, \ 120 .n_voltages = ARRAY_SIZE(vdata##_voltages), \ 121 .volt_table = vdata##_voltages, \ 122 .owner = THIS_MODULE, \ 123 .enable_reg = TPS6586X_SUPPLY##ereg0, \ 124 .enable_mask = 1 << (ebit0), \ 125 .vsel_reg = TPS6586X_##vreg, \ 126 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \ 127 .apply_reg = (goreg), \ 128 .apply_bit = (gobit), \ 129 }, \ 130 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ 131 .enable_bit[0] = (ebit0), \ 132 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ 133 .enable_bit[1] = (ebit1), 134 135#define TPS6586X_REGULATOR_LINEAR(_id, _ops, _pin_name, n_volt, min_uv, \ 136 uv_step, vreg, shift, nbits, ereg0, \ 137 ebit0, ereg1, ebit1, goreg, gobit) \ 138 .desc = { \ 139 .supply_name = _pin_name, \ 140 .name = "REG-" #_id, \ 141 .ops = &tps6586x_## _ops ## _regulator_ops, \ 142 .type = REGULATOR_VOLTAGE, \ 143 .id = TPS6586X_ID_##_id, \ 144 .n_voltages = n_volt, \ 145 .min_uV = min_uv, \ 146 .uV_step = uv_step, \ 147 .owner = THIS_MODULE, \ 148 .enable_reg = TPS6586X_SUPPLY##ereg0, \ 149 .enable_mask = 1 << (ebit0), \ 150 .vsel_reg = TPS6586X_##vreg, \ 151 .vsel_mask = ((1 << (nbits)) - 1) << (shift), \ 152 .apply_reg = (goreg), \ 153 .apply_bit = (gobit), \ 154 }, \ 155 .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ 156 .enable_bit[0] = (ebit0), \ 157 .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ 158 .enable_bit[1] = (ebit1), 159 160#define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \ 161 ereg0, ebit0, ereg1, ebit1) \ 162{ \ 163 TPS6586X_REGULATOR(_id, rw, _pname, vdata, vreg, shift, nbits, \ 164 ereg0, ebit0, ereg1, ebit1, 0, 0) \ 165} 166 167#define TPS6586X_LDO_LINEAR(_id, _pname, n_volt, min_uv, uv_step, vreg, \ 168 shift, nbits, ereg0, ebit0, ereg1, ebit1) \ 169{ \ 170 TPS6586X_REGULATOR_LINEAR(_id, rw_linear, _pname, n_volt, \ 171 min_uv, uv_step, vreg, shift, nbits, \ 172 ereg0, ebit0, ereg1, ebit1, 0, 0) \ 173} 174 175#define TPS6586X_FIXED_LDO(_id, _pname, vdata, vreg, shift, nbits, \ 176 ereg0, ebit0, ereg1, ebit1) \ 177{ \ 178 TPS6586X_REGULATOR(_id, ro, _pname, vdata, vreg, shift, nbits, \ 179 ereg0, ebit0, ereg1, ebit1, 0, 0) \ 180} 181 182#define TPS6586X_DVM(_id, _pname, n_volt, min_uv, uv_step, vreg, shift, \ 183 nbits, ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ 184{ \ 185 TPS6586X_REGULATOR_LINEAR(_id, rw_linear, _pname, n_volt, \ 186 min_uv, uv_step, vreg, shift, nbits, \ 187 ereg0, ebit0, ereg1, ebit1, goreg, \ 188 gobit) \ 189} 190 191#define TPS6586X_SYS_REGULATOR() \ 192{ \ 193 .desc = { \ 194 .supply_name = "sys", \ 195 .name = "REG-SYS", \ 196 .ops = &tps6586x_sys_regulator_ops, \ 197 .type = REGULATOR_VOLTAGE, \ 198 .id = TPS6586X_ID_SYS, \ 199 .owner = THIS_MODULE, \ 200 }, \ 201} 202 203static struct tps6586x_regulator tps6586x_regulator[] = { 204 TPS6586X_SYS_REGULATOR(), 205 TPS6586X_LDO(LDO_0, "vinldo01", tps6586x_ldo0, SUPPLYV1, 5, 3, ENC, 0, 206 END, 0), 207 TPS6586X_LDO(LDO_3, "vinldo23", tps6586x_ldo, SUPPLYV4, 0, 3, ENC, 2, 208 END, 2), 209 TPS6586X_LDO(LDO_5, "REG-SYS", tps6586x_ldo, SUPPLYV6, 0, 3, ENE, 6, 210 ENE, 6), 211 TPS6586X_LDO(LDO_6, "vinldo678", tps6586x_ldo, SUPPLYV3, 0, 3, ENC, 4, 212 END, 4), 213 TPS6586X_LDO(LDO_7, "vinldo678", tps6586x_ldo, SUPPLYV3, 3, 3, ENC, 5, 214 END, 5), 215 TPS6586X_LDO(LDO_8, "vinldo678", tps6586x_ldo, SUPPLYV2, 5, 3, ENC, 6, 216 END, 6), 217 TPS6586X_LDO(LDO_9, "vinldo9", tps6586x_ldo, SUPPLYV6, 3, 3, ENE, 7, 218 ENE, 7), 219 TPS6586X_LDO(LDO_RTC, "REG-SYS", tps6586x_ldo, SUPPLYV4, 3, 3, V4, 7, 220 V4, 7), 221 TPS6586X_LDO_LINEAR(LDO_1, "vinldo01", 32, 725000, 25000, SUPPLYV1, 222 0, 5, ENC, 1, END, 1), 223 TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 3000000, 50000, SUPPLYV2, 224 0, 5, ENC, 7, END, 7), 225 TPS6586X_DVM(LDO_2, "vinldo23", 32, 725000, 25000, LDO2BV1, 0, 5, 226 ENA, 3, ENB, 3, TPS6586X_VCC2, BIT(6)), 227 TPS6586X_DVM(LDO_4, "vinldo4", 32, 1700000, 25000, LDO4V1, 0, 5, 228 ENC, 3, END, 3, TPS6586X_VCC1, BIT(6)), 229 TPS6586X_DVM(SM_0, "vin-sm0", 32, 725000, 25000, SM0V1, 0, 5, 230 ENA, 1, ENB, 1, TPS6586X_VCC1, BIT(2)), 231 TPS6586X_DVM(SM_1, "vin-sm1", 32, 725000, 25000, SM1V1, 0, 5, 232 ENA, 0, ENB, 0, TPS6586X_VCC1, BIT(0)), 233}; 234 235static struct tps6586x_regulator tps658623_regulator[] = { 236 TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 1700000, 25000, SUPPLYV2, 237 0, 5, ENC, 7, END, 7), 238}; 239 240static struct tps6586x_regulator tps658640_regulator[] = { 241 TPS6586X_LDO(LDO_3, "vinldo23", tps6586x_ldo0, SUPPLYV4, 0, 3, 242 ENC, 2, END, 2), 243 TPS6586X_LDO(LDO_5, "REG-SYS", tps6586x_ldo0, SUPPLYV6, 0, 3, 244 ENE, 6, ENE, 6), 245 TPS6586X_LDO(LDO_6, "vinldo678", tps6586x_ldo0, SUPPLYV3, 0, 3, 246 ENC, 4, END, 4), 247 TPS6586X_LDO(LDO_7, "vinldo678", tps6586x_ldo0, SUPPLYV3, 3, 3, 248 ENC, 5, END, 5), 249 TPS6586X_LDO(LDO_8, "vinldo678", tps6586x_ldo0, SUPPLYV2, 5, 3, 250 ENC, 6, END, 6), 251 TPS6586X_LDO(LDO_9, "vinldo9", tps6586x_ldo0, SUPPLYV6, 3, 3, 252 ENE, 7, ENE, 7), 253 TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 2150000, 50000, SUPPLYV2, 254 0, 5, ENC, 7, END, 7), 255 256 TPS6586X_FIXED_LDO(LDO_RTC, "REG-SYS", tps658640_rtc, SUPPLYV4, 3, 2, 257 V4, 7, V4, 7), 258}; 259 260static struct tps6586x_regulator tps658643_regulator[] = { 261 TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 1025000, 25000, SUPPLYV2, 262 0, 5, ENC, 7, END, 7), 263}; 264 265/* 266 * TPS6586X has 2 enable bits that are OR'ed to determine the actual 267 * regulator state. Clearing one of this bits allows switching 268 * regulator on and of with single register write. 269 */ 270static inline int tps6586x_regulator_preinit(struct device *parent, 271 struct tps6586x_regulator *ri) 272{ 273 uint8_t val1, val2; 274 int ret; 275 276 if (ri->enable_reg[0] == ri->enable_reg[1] && 277 ri->enable_bit[0] == ri->enable_bit[1]) 278 return 0; 279 280 ret = tps6586x_read(parent, ri->enable_reg[0], &val1); 281 if (ret) 282 return ret; 283 284 ret = tps6586x_read(parent, ri->enable_reg[1], &val2); 285 if (ret) 286 return ret; 287 288 if (!(val2 & (1 << ri->enable_bit[1]))) 289 return 0; 290 291 /* 292 * The regulator is on, but it's enabled with the bit we don't 293 * want to use, so we switch the enable bits 294 */ 295 if (!(val1 & (1 << ri->enable_bit[0]))) { 296 ret = tps6586x_set_bits(parent, ri->enable_reg[0], 297 1 << ri->enable_bit[0]); 298 if (ret) 299 return ret; 300 } 301 302 return tps6586x_clr_bits(parent, ri->enable_reg[1], 303 1 << ri->enable_bit[1]); 304} 305 306static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev, 307 int id, struct regulator_init_data *p) 308{ 309 struct device *parent = pdev->dev.parent; 310 struct tps6586x_settings *setting = p->driver_data; 311 uint8_t reg; 312 313 if (setting == NULL) 314 return 0; 315 316 if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET)) 317 return 0; 318 319 /* only SM0 and SM1 can have the slew rate settings */ 320 switch (id) { 321 case TPS6586X_ID_SM_0: 322 reg = TPS6586X_SM0SL; 323 break; 324 case TPS6586X_ID_SM_1: 325 reg = TPS6586X_SM1SL; 326 break; 327 default: 328 dev_err(&pdev->dev, "Only SM0/SM1 can set slew rate\n"); 329 return -EINVAL; 330 } 331 332 return tps6586x_write(parent, reg, 333 setting->slew_rate & TPS6586X_SLEW_RATE_MASK); 334} 335 336static struct tps6586x_regulator *find_regulator_info(int id, int version) 337{ 338 struct tps6586x_regulator *ri; 339 struct tps6586x_regulator *table = NULL; 340 int num; 341 int i; 342 343 switch (version) { 344 case TPS658623: 345 table = tps658623_regulator; 346 num = ARRAY_SIZE(tps658623_regulator); 347 break; 348 case TPS658640: 349 case TPS658640v2: 350 table = tps658640_regulator; 351 num = ARRAY_SIZE(tps658640_regulator); 352 break; 353 case TPS658643: 354 table = tps658643_regulator; 355 num = ARRAY_SIZE(tps658643_regulator); 356 break; 357 } 358 359 /* Search version specific table first */ 360 if (table) { 361 for (i = 0; i < num; i++) { 362 ri = &table[i]; 363 if (ri->desc.id == id) 364 return ri; 365 } 366 } 367 368 for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { 369 ri = &tps6586x_regulator[i]; 370 if (ri->desc.id == id) 371 return ri; 372 } 373 return NULL; 374} 375 376#ifdef CONFIG_OF 377static struct of_regulator_match tps6586x_matches[] = { 378 { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS }, 379 { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 }, 380 { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 }, 381 { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 }, 382 { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 }, 383 { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 }, 384 { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 }, 385 { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 }, 386 { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 }, 387 { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 }, 388 { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 }, 389 { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 }, 390 { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 }, 391 { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 }, 392 { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC }, 393}; 394 395static struct tps6586x_platform_data *tps6586x_parse_regulator_dt( 396 struct platform_device *pdev, 397 struct of_regulator_match **tps6586x_reg_matches) 398{ 399 const unsigned int num = ARRAY_SIZE(tps6586x_matches); 400 struct device_node *np = pdev->dev.parent->of_node; 401 struct device_node *regs; 402 const char *sys_rail = NULL; 403 unsigned int i; 404 struct tps6586x_platform_data *pdata; 405 int err; 406 407 regs = of_get_child_by_name(np, "regulators"); 408 if (!regs) { 409 dev_err(&pdev->dev, "regulator node not found\n"); 410 return NULL; 411 } 412 413 err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num); 414 of_node_put(regs); 415 if (err < 0) { 416 dev_err(&pdev->dev, "Regulator match failed, e %d\n", err); 417 return NULL; 418 } 419 420 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 421 if (!pdata) 422 return NULL; 423 424 for (i = 0; i < num; i++) { 425 int id; 426 if (!tps6586x_matches[i].init_data) 427 continue; 428 429 pdata->reg_init_data[i] = tps6586x_matches[i].init_data; 430 id = (int)tps6586x_matches[i].driver_data; 431 if (id == TPS6586X_ID_SYS) 432 sys_rail = pdata->reg_init_data[i]->constraints.name; 433 434 if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC)) 435 pdata->reg_init_data[i]->supply_regulator = sys_rail; 436 } 437 *tps6586x_reg_matches = tps6586x_matches; 438 return pdata; 439} 440#else 441static struct tps6586x_platform_data *tps6586x_parse_regulator_dt( 442 struct platform_device *pdev, 443 struct of_regulator_match **tps6586x_reg_matches) 444{ 445 *tps6586x_reg_matches = NULL; 446 return NULL; 447} 448#endif 449 450static int tps6586x_regulator_probe(struct platform_device *pdev) 451{ 452 struct tps6586x_regulator *ri = NULL; 453 struct regulator_config config = { }; 454 struct regulator_dev *rdev; 455 struct regulator_init_data *reg_data; 456 struct tps6586x_platform_data *pdata; 457 struct of_regulator_match *tps6586x_reg_matches = NULL; 458 int version; 459 int id; 460 int err; 461 462 dev_dbg(&pdev->dev, "Probing regulator\n"); 463 464 pdata = dev_get_platdata(pdev->dev.parent); 465 if ((!pdata) && (pdev->dev.parent->of_node)) 466 pdata = tps6586x_parse_regulator_dt(pdev, 467 &tps6586x_reg_matches); 468 469 if (!pdata) { 470 dev_err(&pdev->dev, "Platform data not available, exiting\n"); 471 return -ENODEV; 472 } 473 474 version = tps6586x_get_version(pdev->dev.parent); 475 476 for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) { 477 reg_data = pdata->reg_init_data[id]; 478 479 ri = find_regulator_info(id, version); 480 481 if (!ri) { 482 dev_err(&pdev->dev, "invalid regulator ID specified\n"); 483 return -EINVAL; 484 } 485 486 err = tps6586x_regulator_preinit(pdev->dev.parent, ri); 487 if (err) { 488 dev_err(&pdev->dev, 489 "regulator %d preinit failed, e %d\n", id, err); 490 return err; 491 } 492 493 config.dev = pdev->dev.parent; 494 config.init_data = reg_data; 495 config.driver_data = ri; 496 497 if (tps6586x_reg_matches) 498 config.of_node = tps6586x_reg_matches[id].of_node; 499 500 rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config); 501 if (IS_ERR(rdev)) { 502 dev_err(&pdev->dev, "failed to register regulator %s\n", 503 ri->desc.name); 504 return PTR_ERR(rdev); 505 } 506 507 if (reg_data) { 508 err = tps6586x_regulator_set_slew_rate(pdev, id, 509 reg_data); 510 if (err < 0) { 511 dev_err(&pdev->dev, 512 "Slew rate config failed, e %d\n", err); 513 return err; 514 } 515 } 516 } 517 518 platform_set_drvdata(pdev, rdev); 519 return 0; 520} 521 522static struct platform_driver tps6586x_regulator_driver = { 523 .driver = { 524 .name = "tps6586x-regulator", 525 .owner = THIS_MODULE, 526 }, 527 .probe = tps6586x_regulator_probe, 528}; 529 530static int __init tps6586x_regulator_init(void) 531{ 532 return platform_driver_register(&tps6586x_regulator_driver); 533} 534subsys_initcall(tps6586x_regulator_init); 535 536static void __exit tps6586x_regulator_exit(void) 537{ 538 platform_driver_unregister(&tps6586x_regulator_driver); 539} 540module_exit(tps6586x_regulator_exit); 541 542MODULE_LICENSE("GPL"); 543MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); 544MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); 545MODULE_ALIAS("platform:tps6586x-regulator"); 546