1 /* 2 * tps65023-regulator.c 3 * 4 * Supports TPS65023 Regulator 5 * 6 * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/ 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation version 2. 11 * 12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, 13 * whether express or implied; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <linux/err.h> 22 #include <linux/platform_device.h> 23 #include <linux/regulator/driver.h> 24 #include <linux/regulator/machine.h> 25 #include <linux/i2c.h> 26 #include <linux/delay.h> 27 #include <linux/slab.h> 28 #include <linux/regmap.h> 29 30 /* Register definitions */ 31 #define TPS65023_REG_VERSION 0 32 #define TPS65023_REG_PGOODZ 1 33 #define TPS65023_REG_MASK 2 34 #define TPS65023_REG_REG_CTRL 3 35 #define TPS65023_REG_CON_CTRL 4 36 #define TPS65023_REG_CON_CTRL2 5 37 #define TPS65023_REG_DEF_CORE 6 38 #define TPS65023_REG_DEFSLEW 7 39 #define TPS65023_REG_LDO_CTRL 8 40 41 /* PGOODZ bitfields */ 42 #define TPS65023_PGOODZ_PWRFAILZ BIT(7) 43 #define TPS65023_PGOODZ_LOWBATTZ BIT(6) 44 #define TPS65023_PGOODZ_VDCDC1 BIT(5) 45 #define TPS65023_PGOODZ_VDCDC2 BIT(4) 46 #define TPS65023_PGOODZ_VDCDC3 BIT(3) 47 #define TPS65023_PGOODZ_LDO2 BIT(2) 48 #define TPS65023_PGOODZ_LDO1 BIT(1) 49 50 /* MASK bitfields */ 51 #define TPS65023_MASK_PWRFAILZ BIT(7) 52 #define TPS65023_MASK_LOWBATTZ BIT(6) 53 #define TPS65023_MASK_VDCDC1 BIT(5) 54 #define TPS65023_MASK_VDCDC2 BIT(4) 55 #define TPS65023_MASK_VDCDC3 BIT(3) 56 #define TPS65023_MASK_LDO2 BIT(2) 57 #define TPS65023_MASK_LDO1 BIT(1) 58 59 /* REG_CTRL bitfields */ 60 #define TPS65023_REG_CTRL_VDCDC1_EN BIT(5) 61 #define TPS65023_REG_CTRL_VDCDC2_EN BIT(4) 62 #define TPS65023_REG_CTRL_VDCDC3_EN BIT(3) 63 #define TPS65023_REG_CTRL_LDO2_EN BIT(2) 64 #define TPS65023_REG_CTRL_LDO1_EN BIT(1) 65 66 /* LDO_CTRL bitfields */ 67 #define TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_id) ((ldo_id)*4) 68 #define TPS65023_LDO_CTRL_LDOx_MASK(ldo_id) (0xF0 >> ((ldo_id)*4)) 69 70 /* Number of step-down converters available */ 71 #define TPS65023_NUM_DCDC 3 72 /* Number of LDO voltage regulators available */ 73 #define TPS65023_NUM_LDO 2 74 /* Number of total regulators available */ 75 #define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO) 76 77 /* DCDCs */ 78 #define TPS65023_DCDC_1 0 79 #define TPS65023_DCDC_2 1 80 #define TPS65023_DCDC_3 2 81 /* LDOs */ 82 #define TPS65023_LDO_1 3 83 #define TPS65023_LDO_2 4 84 85 #define TPS65023_MAX_REG_ID TPS65023_LDO_2 86 87 /* Supported voltage values for regulators */ 88 static const u16 VDCDC1_VSEL_table[] = { 89 800, 825, 850, 875, 90 900, 925, 950, 975, 91 1000, 1025, 1050, 1075, 92 1100, 1125, 1150, 1175, 93 1200, 1225, 1250, 1275, 94 1300, 1325, 1350, 1375, 95 1400, 1425, 1450, 1475, 96 1500, 1525, 1550, 1600, 97 }; 98 99 static const u16 LDO1_VSEL_table[] = { 100 1000, 1100, 1300, 1800, 101 2200, 2600, 2800, 3150, 102 }; 103 104 static const u16 LDO2_VSEL_table[] = { 105 1050, 1200, 1300, 1800, 106 2500, 2800, 3000, 3300, 107 }; 108 109 static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDC1_VSEL_table), 110 0, 0, ARRAY_SIZE(LDO1_VSEL_table), 111 ARRAY_SIZE(LDO2_VSEL_table)}; 112 113 /* Regulator specific details */ 114 struct tps_info { 115 const char *name; 116 unsigned min_uV; 117 unsigned max_uV; 118 bool fixed; 119 u8 table_len; 120 const u16 *table; 121 }; 122 123 /* PMIC details */ 124 struct tps_pmic { 125 struct regulator_desc desc[TPS65023_NUM_REGULATOR]; 126 struct i2c_client *client; 127 struct regulator_dev *rdev[TPS65023_NUM_REGULATOR]; 128 const struct tps_info *info[TPS65023_NUM_REGULATOR]; 129 struct regmap *regmap; 130 }; 131 132 static int tps_65023_set_bits(struct tps_pmic *tps, u8 reg, u8 mask) 133 { 134 return regmap_update_bits(tps->regmap, reg, mask, mask); 135 } 136 137 static int tps_65023_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask) 138 { 139 return regmap_update_bits(tps->regmap, reg, mask, 0); 140 } 141 142 static int tps_65023_reg_read(struct tps_pmic *tps, u8 reg) 143 { 144 unsigned int val; 145 int ret; 146 147 ret = regmap_read(tps->regmap, reg, &val); 148 149 if (ret != 0) 150 return ret; 151 else 152 return val; 153 } 154 155 static int tps_65023_reg_write(struct tps_pmic *tps, u8 reg, u8 val) 156 { 157 return regmap_write(tps->regmap, reg, val); 158 } 159 160 static int tps65023_dcdc_is_enabled(struct regulator_dev *dev) 161 { 162 struct tps_pmic *tps = rdev_get_drvdata(dev); 163 int data, dcdc = rdev_get_id(dev); 164 u8 shift; 165 166 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) 167 return -EINVAL; 168 169 shift = TPS65023_NUM_REGULATOR - dcdc; 170 data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL); 171 172 if (data < 0) 173 return data; 174 else 175 return (data & 1<<shift) ? 1 : 0; 176 } 177 178 static int tps65023_ldo_is_enabled(struct regulator_dev *dev) 179 { 180 struct tps_pmic *tps = rdev_get_drvdata(dev); 181 int data, ldo = rdev_get_id(dev); 182 u8 shift; 183 184 if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) 185 return -EINVAL; 186 187 shift = (ldo == TPS65023_LDO_1 ? 1 : 2); 188 data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL); 189 190 if (data < 0) 191 return data; 192 else 193 return (data & 1<<shift) ? 1 : 0; 194 } 195 196 static int tps65023_dcdc_enable(struct regulator_dev *dev) 197 { 198 struct tps_pmic *tps = rdev_get_drvdata(dev); 199 int dcdc = rdev_get_id(dev); 200 u8 shift; 201 202 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) 203 return -EINVAL; 204 205 shift = TPS65023_NUM_REGULATOR - dcdc; 206 return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift); 207 } 208 209 static int tps65023_dcdc_disable(struct regulator_dev *dev) 210 { 211 struct tps_pmic *tps = rdev_get_drvdata(dev); 212 int dcdc = rdev_get_id(dev); 213 u8 shift; 214 215 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) 216 return -EINVAL; 217 218 shift = TPS65023_NUM_REGULATOR - dcdc; 219 return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift); 220 } 221 222 static int tps65023_ldo_enable(struct regulator_dev *dev) 223 { 224 struct tps_pmic *tps = rdev_get_drvdata(dev); 225 int ldo = rdev_get_id(dev); 226 u8 shift; 227 228 if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) 229 return -EINVAL; 230 231 shift = (ldo == TPS65023_LDO_1 ? 1 : 2); 232 return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift); 233 } 234 235 static int tps65023_ldo_disable(struct regulator_dev *dev) 236 { 237 struct tps_pmic *tps = rdev_get_drvdata(dev); 238 int ldo = rdev_get_id(dev); 239 u8 shift; 240 241 if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) 242 return -EINVAL; 243 244 shift = (ldo == TPS65023_LDO_1 ? 1 : 2); 245 return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift); 246 } 247 248 static int tps65023_dcdc_get_voltage(struct regulator_dev *dev) 249 { 250 struct tps_pmic *tps = rdev_get_drvdata(dev); 251 int data, dcdc = rdev_get_id(dev); 252 253 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) 254 return -EINVAL; 255 256 if (dcdc == TPS65023_DCDC_1) { 257 data = tps_65023_reg_read(tps, TPS65023_REG_DEF_CORE); 258 if (data < 0) 259 return data; 260 data &= (tps->info[dcdc]->table_len - 1); 261 return tps->info[dcdc]->table[data] * 1000; 262 } else 263 return tps->info[dcdc]->min_uV; 264 } 265 266 static int tps65023_dcdc_set_voltage(struct regulator_dev *dev, 267 int min_uV, int max_uV, 268 unsigned *selector) 269 { 270 struct tps_pmic *tps = rdev_get_drvdata(dev); 271 int dcdc = rdev_get_id(dev); 272 int vsel; 273 274 if (dcdc != TPS65023_DCDC_1) 275 return -EINVAL; 276 277 if (min_uV < tps->info[dcdc]->min_uV 278 || min_uV > tps->info[dcdc]->max_uV) 279 return -EINVAL; 280 if (max_uV < tps->info[dcdc]->min_uV 281 || max_uV > tps->info[dcdc]->max_uV) 282 return -EINVAL; 283 284 for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) { 285 int mV = tps->info[dcdc]->table[vsel]; 286 int uV = mV * 1000; 287 288 /* Break at the first in-range value */ 289 if (min_uV <= uV && uV <= max_uV) 290 break; 291 } 292 293 *selector = vsel; 294 295 /* write to the register in case we found a match */ 296 if (vsel == tps->info[dcdc]->table_len) 297 return -EINVAL; 298 else 299 return tps_65023_reg_write(tps, TPS65023_REG_DEF_CORE, vsel); 300 } 301 302 static int tps65023_ldo_get_voltage(struct regulator_dev *dev) 303 { 304 struct tps_pmic *tps = rdev_get_drvdata(dev); 305 int data, ldo = rdev_get_id(dev); 306 307 if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) 308 return -EINVAL; 309 310 data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL); 311 if (data < 0) 312 return data; 313 314 data >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1)); 315 data &= (tps->info[ldo]->table_len - 1); 316 return tps->info[ldo]->table[data] * 1000; 317 } 318 319 static int tps65023_ldo_set_voltage(struct regulator_dev *dev, 320 int min_uV, int max_uV, unsigned *selector) 321 { 322 struct tps_pmic *tps = rdev_get_drvdata(dev); 323 int data, vsel, ldo = rdev_get_id(dev); 324 325 if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) 326 return -EINVAL; 327 328 if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV) 329 return -EINVAL; 330 if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV) 331 return -EINVAL; 332 333 for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) { 334 int mV = tps->info[ldo]->table[vsel]; 335 int uV = mV * 1000; 336 337 /* Break at the first in-range value */ 338 if (min_uV <= uV && uV <= max_uV) 339 break; 340 } 341 342 if (vsel == tps->info[ldo]->table_len) 343 return -EINVAL; 344 345 *selector = vsel; 346 347 data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL); 348 if (data < 0) 349 return data; 350 351 data &= TPS65023_LDO_CTRL_LDOx_MASK(ldo - TPS65023_LDO_1); 352 data |= (vsel << (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1))); 353 return tps_65023_reg_write(tps, TPS65023_REG_LDO_CTRL, data); 354 } 355 356 static int tps65023_dcdc_list_voltage(struct regulator_dev *dev, 357 unsigned selector) 358 { 359 struct tps_pmic *tps = rdev_get_drvdata(dev); 360 int dcdc = rdev_get_id(dev); 361 362 if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) 363 return -EINVAL; 364 365 if (dcdc == TPS65023_DCDC_1) { 366 if (selector >= tps->info[dcdc]->table_len) 367 return -EINVAL; 368 else 369 return tps->info[dcdc]->table[selector] * 1000; 370 } else 371 return tps->info[dcdc]->min_uV; 372 } 373 374 static int tps65023_ldo_list_voltage(struct regulator_dev *dev, 375 unsigned selector) 376 { 377 struct tps_pmic *tps = rdev_get_drvdata(dev); 378 int ldo = rdev_get_id(dev); 379 380 if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) 381 return -EINVAL; 382 383 if (selector >= tps->info[ldo]->table_len) 384 return -EINVAL; 385 else 386 return tps->info[ldo]->table[selector] * 1000; 387 } 388 389 /* Operations permitted on VDCDCx */ 390 static struct regulator_ops tps65023_dcdc_ops = { 391 .is_enabled = tps65023_dcdc_is_enabled, 392 .enable = tps65023_dcdc_enable, 393 .disable = tps65023_dcdc_disable, 394 .get_voltage = tps65023_dcdc_get_voltage, 395 .set_voltage = tps65023_dcdc_set_voltage, 396 .list_voltage = tps65023_dcdc_list_voltage, 397 }; 398 399 /* Operations permitted on LDOx */ 400 static struct regulator_ops tps65023_ldo_ops = { 401 .is_enabled = tps65023_ldo_is_enabled, 402 .enable = tps65023_ldo_enable, 403 .disable = tps65023_ldo_disable, 404 .get_voltage = tps65023_ldo_get_voltage, 405 .set_voltage = tps65023_ldo_set_voltage, 406 .list_voltage = tps65023_ldo_list_voltage, 407 }; 408 409 static struct regmap_config tps65023_regmap_config = { 410 .reg_bits = 8, 411 .val_bits = 8, 412 }; 413 414 static int __devinit tps_65023_probe(struct i2c_client *client, 415 const struct i2c_device_id *id) 416 { 417 const struct tps_info *info = (void *)id->driver_data; 418 struct regulator_init_data *init_data; 419 struct regulator_dev *rdev; 420 struct tps_pmic *tps; 421 int i; 422 int error; 423 424 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 425 return -EIO; 426 427 /** 428 * init_data points to array of regulator_init structures 429 * coming from the board-evm file. 430 */ 431 init_data = client->dev.platform_data; 432 if (!init_data) 433 return -EIO; 434 435 tps = kzalloc(sizeof(*tps), GFP_KERNEL); 436 if (!tps) 437 return -ENOMEM; 438 439 tps->regmap = regmap_init_i2c(client, &tps65023_regmap_config); 440 if (IS_ERR(tps->regmap)) { 441 error = PTR_ERR(tps->regmap); 442 dev_err(&client->dev, "Failed to allocate register map: %d\n", 443 error); 444 goto fail_alloc; 445 } 446 447 /* common for all regulators */ 448 tps->client = client; 449 450 for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) { 451 /* Store regulator specific information */ 452 tps->info[i] = info; 453 454 tps->desc[i].name = info->name; 455 tps->desc[i].id = i; 456 tps->desc[i].n_voltages = num_voltages[i]; 457 tps->desc[i].ops = (i > TPS65023_DCDC_3 ? 458 &tps65023_ldo_ops : &tps65023_dcdc_ops); 459 tps->desc[i].type = REGULATOR_VOLTAGE; 460 tps->desc[i].owner = THIS_MODULE; 461 462 /* Register the regulators */ 463 rdev = regulator_register(&tps->desc[i], &client->dev, 464 init_data, tps); 465 if (IS_ERR(rdev)) { 466 dev_err(&client->dev, "failed to register %s\n", 467 id->name); 468 error = PTR_ERR(rdev); 469 goto fail; 470 } 471 472 /* Save regulator for cleanup */ 473 tps->rdev[i] = rdev; 474 } 475 476 i2c_set_clientdata(client, tps); 477 478 return 0; 479 480 fail: 481 while (--i >= 0) 482 regulator_unregister(tps->rdev[i]); 483 484 regmap_exit(tps->regmap); 485 fail_alloc: 486 kfree(tps); 487 return error; 488 } 489 490 /** 491 * tps_65023_remove - TPS65023 driver i2c remove handler 492 * @client: i2c driver client device structure 493 * 494 * Unregister TPS driver as an i2c client device driver 495 */ 496 static int __devexit tps_65023_remove(struct i2c_client *client) 497 { 498 struct tps_pmic *tps = i2c_get_clientdata(client); 499 int i; 500 501 for (i = 0; i < TPS65023_NUM_REGULATOR; i++) 502 regulator_unregister(tps->rdev[i]); 503 504 regmap_exit(tps->regmap); 505 kfree(tps); 506 507 return 0; 508 } 509 510 static const struct tps_info tps65023_regs[] = { 511 { 512 .name = "VDCDC1", 513 .min_uV = 800000, 514 .max_uV = 1600000, 515 .table_len = ARRAY_SIZE(VDCDC1_VSEL_table), 516 .table = VDCDC1_VSEL_table, 517 }, 518 { 519 .name = "VDCDC2", 520 .min_uV = 3300000, 521 .max_uV = 3300000, 522 .fixed = 1, 523 }, 524 { 525 .name = "VDCDC3", 526 .min_uV = 1800000, 527 .max_uV = 1800000, 528 .fixed = 1, 529 }, 530 { 531 .name = "LDO1", 532 .min_uV = 1000000, 533 .max_uV = 3150000, 534 .table_len = ARRAY_SIZE(LDO1_VSEL_table), 535 .table = LDO1_VSEL_table, 536 }, 537 { 538 .name = "LDO2", 539 .min_uV = 1050000, 540 .max_uV = 3300000, 541 .table_len = ARRAY_SIZE(LDO2_VSEL_table), 542 .table = LDO2_VSEL_table, 543 }, 544 }; 545 546 static const struct i2c_device_id tps_65023_id[] = { 547 {.name = "tps65023", 548 .driver_data = (unsigned long) tps65023_regs,}, 549 {.name = "tps65021", 550 .driver_data = (unsigned long) tps65023_regs,}, 551 { }, 552 }; 553 554 MODULE_DEVICE_TABLE(i2c, tps_65023_id); 555 556 static struct i2c_driver tps_65023_i2c_driver = { 557 .driver = { 558 .name = "tps65023", 559 .owner = THIS_MODULE, 560 }, 561 .probe = tps_65023_probe, 562 .remove = __devexit_p(tps_65023_remove), 563 .id_table = tps_65023_id, 564 }; 565 566 /** 567 * tps_65023_init 568 * 569 * Module init function 570 */ 571 static int __init tps_65023_init(void) 572 { 573 return i2c_add_driver(&tps_65023_i2c_driver); 574 } 575 subsys_initcall(tps_65023_init); 576 577 /** 578 * tps_65023_cleanup 579 * 580 * Module exit function 581 */ 582 static void __exit tps_65023_cleanup(void) 583 { 584 i2c_del_driver(&tps_65023_i2c_driver); 585 } 586 module_exit(tps_65023_cleanup); 587 588 MODULE_AUTHOR("Texas Instruments"); 589 MODULE_DESCRIPTION("TPS65023 voltage regulator driver"); 590 MODULE_LICENSE("GPL v2"); 591