1 2 /* 3 * Regulator driver for DA9063 PMIC series 4 * 5 * Copyright 2012 Dialog Semiconductors Ltd. 6 * Copyright 2013 Philipp Zabel, Pengutronix 7 * 8 * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 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/slab.h> 21 #include <linux/of.h> 22 #include <linux/platform_device.h> 23 #include <linux/regmap.h> 24 #include <linux/regulator/driver.h> 25 #include <linux/regulator/machine.h> 26 #include <linux/regulator/of_regulator.h> 27 #include <linux/mfd/da9063/core.h> 28 #include <linux/mfd/da9063/pdata.h> 29 #include <linux/mfd/da9063/registers.h> 30 31 32 /* Definition for registering regmap bit fields using a mask */ 33 #define BFIELD(_reg, _mask) \ 34 REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \ 35 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1) 36 37 /* Regulator capabilities and registers description */ 38 struct da9063_regulator_info { 39 struct regulator_desc desc; 40 41 /* Current limiting */ 42 unsigned n_current_limits; 43 const int *current_limits; 44 45 /* DA9063 main register fields */ 46 struct reg_field mode; /* buck mode of operation */ 47 struct reg_field suspend; 48 struct reg_field sleep; 49 struct reg_field suspend_sleep; 50 unsigned int suspend_vsel_reg; 51 struct reg_field ilimit; 52 53 /* DA9063 event detection bit */ 54 struct reg_field oc_event; 55 }; 56 57 /* Macros for LDO */ 58 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \ 59 .desc.id = chip##_ID_##regl_name, \ 60 .desc.name = __stringify(chip##_##regl_name), \ 61 .desc.ops = &da9063_ldo_ops, \ 62 .desc.min_uV = (min_mV) * 1000, \ 63 .desc.uV_step = (step_mV) * 1000, \ 64 .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \ 65 + (DA9063_V##regl_name##_BIAS)), \ 66 .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \ 67 .desc.enable_mask = DA9063_LDO_EN, \ 68 .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \ 69 .desc.vsel_mask = DA9063_V##regl_name##_MASK, \ 70 .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \ 71 .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \ 72 .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \ 73 .suspend_vsel_reg = DA9063_REG_V##regl_name##_B 74 75 /* Macros for voltage DC/DC converters (BUCKs) */ 76 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \ 77 .desc.id = chip##_ID_##regl_name, \ 78 .desc.name = __stringify(chip##_##regl_name), \ 79 .desc.ops = &da9063_buck_ops, \ 80 .desc.min_uV = (min_mV) * 1000, \ 81 .desc.uV_step = (step_mV) * 1000, \ 82 .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \ 83 .current_limits = limits_array, \ 84 .n_current_limits = ARRAY_SIZE(limits_array) 85 86 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \ 87 .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \ 88 .desc.enable_mask = DA9063_BUCK_EN, \ 89 .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \ 90 .desc.vsel_mask = DA9063_VBUCK_MASK, \ 91 .desc.linear_min_sel = DA9063_VBUCK_BIAS, \ 92 .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \ 93 .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \ 94 .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \ 95 .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK) 96 97 /* Defines asignment of regulators info table to chip model */ 98 struct da9063_dev_model { 99 const struct da9063_regulator_info *regulator_info; 100 unsigned n_regulators; 101 unsigned dev_model; 102 }; 103 104 /* Single regulator settings */ 105 struct da9063_regulator { 106 struct regulator_desc desc; 107 struct regulator_dev *rdev; 108 struct da9063 *hw; 109 const struct da9063_regulator_info *info; 110 111 struct regmap_field *mode; 112 struct regmap_field *suspend; 113 struct regmap_field *sleep; 114 struct regmap_field *suspend_sleep; 115 struct regmap_field *ilimit; 116 }; 117 118 /* Encapsulates all information for the regulators driver */ 119 struct da9063_regulators { 120 unsigned n_regulators; 121 /* Array size to be defined during init. Keep at end. */ 122 struct da9063_regulator regulator[0]; 123 }; 124 125 /* BUCK modes for DA9063 */ 126 enum { 127 BUCK_MODE_MANUAL, /* 0 */ 128 BUCK_MODE_SLEEP, /* 1 */ 129 BUCK_MODE_SYNC, /* 2 */ 130 BUCK_MODE_AUTO /* 3 */ 131 }; 132 133 /* Regulator operations */ 134 135 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO. 136 Entry indexes corresponds to register values. */ 137 static const int da9063_buck_a_limits[] = { 138 500000, 600000, 700000, 800000, 900000, 1000000, 1100000, 1200000, 139 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000 140 }; 141 142 /* Current limits array (in uA) for BMEM, BIO, BPERI. 143 Entry indexes corresponds to register values. */ 144 static const int da9063_buck_b_limits[] = { 145 1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000, 146 2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000 147 }; 148 149 /* Current limits array (in uA) for merged BCORE1 and BCORE2. 150 Entry indexes corresponds to register values. */ 151 static const int da9063_bcores_merged_limits[] = { 152 1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000, 153 2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000 154 }; 155 156 /* Current limits array (in uA) for merged BMEM and BIO. 157 Entry indexes corresponds to register values. */ 158 static const int da9063_bmem_bio_merged_limits[] = { 159 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000, 160 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000 161 }; 162 163 static int da9063_set_current_limit(struct regulator_dev *rdev, 164 int min_uA, int max_uA) 165 { 166 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 167 const struct da9063_regulator_info *rinfo = regl->info; 168 int n, tval; 169 170 for (n = 0; n < rinfo->n_current_limits; n++) { 171 tval = rinfo->current_limits[n]; 172 if (tval >= min_uA && tval <= max_uA) 173 return regmap_field_write(regl->ilimit, n); 174 } 175 176 return -EINVAL; 177 } 178 179 static int da9063_get_current_limit(struct regulator_dev *rdev) 180 { 181 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 182 const struct da9063_regulator_info *rinfo = regl->info; 183 unsigned int sel; 184 int ret; 185 186 ret = regmap_field_read(regl->ilimit, &sel); 187 if (ret < 0) 188 return ret; 189 190 if (sel >= rinfo->n_current_limits) 191 sel = rinfo->n_current_limits - 1; 192 193 return rinfo->current_limits[sel]; 194 } 195 196 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode) 197 { 198 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 199 unsigned val; 200 201 switch (mode) { 202 case REGULATOR_MODE_FAST: 203 val = BUCK_MODE_SYNC; 204 break; 205 case REGULATOR_MODE_NORMAL: 206 val = BUCK_MODE_AUTO; 207 break; 208 case REGULATOR_MODE_STANDBY: 209 val = BUCK_MODE_SLEEP; 210 break; 211 default: 212 return -EINVAL; 213 } 214 215 return regmap_field_write(regl->mode, val); 216 } 217 218 /* 219 * Bucks use single mode register field for normal operation 220 * and suspend state. 221 * There are 3 modes to map to: FAST, NORMAL, and STANDBY. 222 */ 223 224 static unsigned da9063_buck_get_mode(struct regulator_dev *rdev) 225 { 226 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 227 struct regmap_field *field; 228 unsigned int val, mode = 0; 229 int ret; 230 231 ret = regmap_field_read(regl->mode, &val); 232 if (ret < 0) 233 return ret; 234 235 switch (val) { 236 default: 237 case BUCK_MODE_MANUAL: 238 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY; 239 /* Sleep flag bit decides the mode */ 240 break; 241 case BUCK_MODE_SLEEP: 242 return REGULATOR_MODE_STANDBY; 243 case BUCK_MODE_SYNC: 244 return REGULATOR_MODE_FAST; 245 case BUCK_MODE_AUTO: 246 return REGULATOR_MODE_NORMAL; 247 } 248 249 /* Detect current regulator state */ 250 ret = regmap_field_read(regl->suspend, &val); 251 if (ret < 0) 252 return 0; 253 254 /* Read regulator mode from proper register, depending on state */ 255 if (val) 256 field = regl->suspend_sleep; 257 else 258 field = regl->sleep; 259 260 ret = regmap_field_read(field, &val); 261 if (ret < 0) 262 return 0; 263 264 if (val) 265 mode &= REGULATOR_MODE_STANDBY; 266 else 267 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST; 268 269 return mode; 270 } 271 272 /* 273 * LDOs use sleep flags - one for normal and one for suspend state. 274 * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state. 275 */ 276 277 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode) 278 { 279 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 280 unsigned val; 281 282 switch (mode) { 283 case REGULATOR_MODE_NORMAL: 284 val = 0; 285 break; 286 case REGULATOR_MODE_STANDBY: 287 val = 1; 288 break; 289 default: 290 return -EINVAL; 291 } 292 293 return regmap_field_write(regl->sleep, val); 294 } 295 296 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev) 297 { 298 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 299 struct regmap_field *field; 300 int ret, val; 301 302 /* Detect current regulator state */ 303 ret = regmap_field_read(regl->suspend, &val); 304 if (ret < 0) 305 return 0; 306 307 /* Read regulator mode from proper register, depending on state */ 308 if (val) 309 field = regl->suspend_sleep; 310 else 311 field = regl->sleep; 312 313 ret = regmap_field_read(field, &val); 314 if (ret < 0) 315 return 0; 316 317 if (val) 318 return REGULATOR_MODE_STANDBY; 319 else 320 return REGULATOR_MODE_NORMAL; 321 } 322 323 static int da9063_buck_get_status(struct regulator_dev *rdev) 324 { 325 int ret = regulator_is_enabled_regmap(rdev); 326 327 if (ret == 0) { 328 ret = REGULATOR_STATUS_OFF; 329 } else if (ret > 0) { 330 ret = da9063_buck_get_mode(rdev); 331 if (ret > 0) 332 ret = regulator_mode_to_status(ret); 333 else if (ret == 0) 334 ret = -EIO; 335 } 336 337 return ret; 338 } 339 340 static int da9063_ldo_get_status(struct regulator_dev *rdev) 341 { 342 int ret = regulator_is_enabled_regmap(rdev); 343 344 if (ret == 0) { 345 ret = REGULATOR_STATUS_OFF; 346 } else if (ret > 0) { 347 ret = da9063_ldo_get_mode(rdev); 348 if (ret > 0) 349 ret = regulator_mode_to_status(ret); 350 else if (ret == 0) 351 ret = -EIO; 352 } 353 354 return ret; 355 } 356 357 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV) 358 { 359 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 360 const struct da9063_regulator_info *rinfo = regl->info; 361 int ret, sel; 362 363 sel = regulator_map_voltage_linear(rdev, uV, uV); 364 if (sel < 0) 365 return sel; 366 367 sel <<= ffs(rdev->desc->vsel_mask) - 1; 368 369 ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg, 370 rdev->desc->vsel_mask, sel); 371 372 return ret; 373 } 374 375 static int da9063_suspend_enable(struct regulator_dev *rdev) 376 { 377 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 378 379 return regmap_field_write(regl->suspend, 1); 380 } 381 382 static int da9063_suspend_disable(struct regulator_dev *rdev) 383 { 384 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 385 386 return regmap_field_write(regl->suspend, 0); 387 } 388 389 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode) 390 { 391 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 392 int val; 393 394 switch (mode) { 395 case REGULATOR_MODE_FAST: 396 val = BUCK_MODE_SYNC; 397 break; 398 case REGULATOR_MODE_NORMAL: 399 val = BUCK_MODE_AUTO; 400 break; 401 case REGULATOR_MODE_STANDBY: 402 val = BUCK_MODE_SLEEP; 403 break; 404 default: 405 return -EINVAL; 406 } 407 408 return regmap_field_write(regl->mode, val); 409 } 410 411 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode) 412 { 413 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 414 unsigned val; 415 416 switch (mode) { 417 case REGULATOR_MODE_NORMAL: 418 val = 0; 419 break; 420 case REGULATOR_MODE_STANDBY: 421 val = 1; 422 break; 423 default: 424 return -EINVAL; 425 } 426 427 return regmap_field_write(regl->suspend_sleep, val); 428 } 429 430 static const struct regulator_ops da9063_buck_ops = { 431 .enable = regulator_enable_regmap, 432 .disable = regulator_disable_regmap, 433 .is_enabled = regulator_is_enabled_regmap, 434 .get_voltage_sel = regulator_get_voltage_sel_regmap, 435 .set_voltage_sel = regulator_set_voltage_sel_regmap, 436 .list_voltage = regulator_list_voltage_linear, 437 .set_current_limit = da9063_set_current_limit, 438 .get_current_limit = da9063_get_current_limit, 439 .set_mode = da9063_buck_set_mode, 440 .get_mode = da9063_buck_get_mode, 441 .get_status = da9063_buck_get_status, 442 .set_suspend_voltage = da9063_set_suspend_voltage, 443 .set_suspend_enable = da9063_suspend_enable, 444 .set_suspend_disable = da9063_suspend_disable, 445 .set_suspend_mode = da9063_buck_set_suspend_mode, 446 }; 447 448 static const struct regulator_ops da9063_ldo_ops = { 449 .enable = regulator_enable_regmap, 450 .disable = regulator_disable_regmap, 451 .is_enabled = regulator_is_enabled_regmap, 452 .get_voltage_sel = regulator_get_voltage_sel_regmap, 453 .set_voltage_sel = regulator_set_voltage_sel_regmap, 454 .list_voltage = regulator_list_voltage_linear, 455 .set_mode = da9063_ldo_set_mode, 456 .get_mode = da9063_ldo_get_mode, 457 .get_status = da9063_ldo_get_status, 458 .set_suspend_voltage = da9063_set_suspend_voltage, 459 .set_suspend_enable = da9063_suspend_enable, 460 .set_suspend_disable = da9063_suspend_disable, 461 .set_suspend_mode = da9063_ldo_set_suspend_mode, 462 }; 463 464 /* Info of regulators for DA9063 */ 465 static const struct da9063_regulator_info da9063_regulator_info[] = { 466 { 467 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570, 468 da9063_buck_a_limits), 469 DA9063_BUCK_COMMON_FIELDS(BCORE1), 470 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL), 471 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C, 472 DA9063_BCORE1_ILIM_MASK), 473 }, 474 { 475 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570, 476 da9063_buck_a_limits), 477 DA9063_BUCK_COMMON_FIELDS(BCORE2), 478 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL), 479 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C, 480 DA9063_BCORE2_ILIM_MASK), 481 }, 482 { 483 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800, 484 da9063_buck_a_limits), 485 DA9063_BUCK_COMMON_FIELDS(BPRO), 486 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL), 487 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B, 488 DA9063_BPRO_ILIM_MASK), 489 }, 490 { 491 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340, 492 da9063_buck_b_limits), 493 DA9063_BUCK_COMMON_FIELDS(BMEM), 494 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL), 495 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A, 496 DA9063_BMEM_ILIM_MASK), 497 }, 498 { 499 DA9063_BUCK(DA9063, BIO, 800, 20, 3340, 500 da9063_buck_b_limits), 501 DA9063_BUCK_COMMON_FIELDS(BIO), 502 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL), 503 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A, 504 DA9063_BIO_ILIM_MASK), 505 }, 506 { 507 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340, 508 da9063_buck_b_limits), 509 DA9063_BUCK_COMMON_FIELDS(BPERI), 510 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL), 511 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B, 512 DA9063_BPERI_ILIM_MASK), 513 }, 514 { 515 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570, 516 da9063_bcores_merged_limits), 517 /* BCORES_MERGED uses the same register fields as BCORE1 */ 518 DA9063_BUCK_COMMON_FIELDS(BCORE1), 519 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL), 520 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C, 521 DA9063_BCORE1_ILIM_MASK), 522 }, 523 { 524 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340, 525 da9063_bmem_bio_merged_limits), 526 /* BMEM_BIO_MERGED uses the same register fields as BMEM */ 527 DA9063_BUCK_COMMON_FIELDS(BMEM), 528 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL), 529 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A, 530 DA9063_BMEM_ILIM_MASK), 531 }, 532 { 533 DA9063_LDO(DA9063, LDO1, 600, 20, 1860), 534 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL), 535 }, 536 { 537 DA9063_LDO(DA9063, LDO2, 600, 20, 1860), 538 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL), 539 }, 540 { 541 DA9063_LDO(DA9063, LDO3, 900, 20, 3440), 542 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL), 543 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM), 544 }, 545 { 546 DA9063_LDO(DA9063, LDO4, 900, 20, 3440), 547 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL), 548 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM), 549 }, 550 { 551 DA9063_LDO(DA9063, LDO5, 900, 50, 3600), 552 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL), 553 }, 554 { 555 DA9063_LDO(DA9063, LDO6, 900, 50, 3600), 556 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL), 557 }, 558 { 559 DA9063_LDO(DA9063, LDO7, 900, 50, 3600), 560 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL), 561 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM), 562 }, 563 { 564 DA9063_LDO(DA9063, LDO8, 900, 50, 3600), 565 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL), 566 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM), 567 }, 568 { 569 DA9063_LDO(DA9063, LDO9, 950, 50, 3600), 570 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL), 571 }, 572 { 573 DA9063_LDO(DA9063, LDO10, 900, 50, 3600), 574 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL), 575 }, 576 { 577 DA9063_LDO(DA9063, LDO11, 900, 50, 3600), 578 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL), 579 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM), 580 }, 581 }; 582 583 /* Link chip model with regulators info table */ 584 static struct da9063_dev_model regulators_models[] = { 585 { 586 .regulator_info = da9063_regulator_info, 587 .n_regulators = ARRAY_SIZE(da9063_regulator_info), 588 .dev_model = PMIC_DA9063, 589 }, 590 { } 591 }; 592 593 /* Regulator interrupt handlers */ 594 static irqreturn_t da9063_ldo_lim_event(int irq, void *data) 595 { 596 struct da9063_regulators *regulators = data; 597 struct da9063 *hw = regulators->regulator[0].hw; 598 struct da9063_regulator *regl; 599 int bits, i , ret; 600 601 ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits); 602 if (ret < 0) 603 return IRQ_NONE; 604 605 for (i = regulators->n_regulators - 1; i >= 0; i--) { 606 regl = ®ulators->regulator[i]; 607 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D) 608 continue; 609 610 if (BIT(regl->info->oc_event.lsb) & bits) 611 regulator_notifier_call_chain(regl->rdev, 612 REGULATOR_EVENT_OVER_CURRENT, NULL); 613 } 614 615 return IRQ_HANDLED; 616 } 617 618 /* 619 * Probing and Initialisation functions 620 */ 621 static const struct regulator_init_data *da9063_get_regulator_initdata( 622 const struct da9063_regulators_pdata *regl_pdata, int id) 623 { 624 int i; 625 626 for (i = 0; i < regl_pdata->n_regulators; i++) { 627 if (id == regl_pdata->regulator_data[i].id) 628 return regl_pdata->regulator_data[i].initdata; 629 } 630 631 return NULL; 632 } 633 634 #ifdef CONFIG_OF 635 static struct of_regulator_match da9063_matches[] = { 636 [DA9063_ID_BCORE1] = { .name = "bcore1" }, 637 [DA9063_ID_BCORE2] = { .name = "bcore2" }, 638 [DA9063_ID_BPRO] = { .name = "bpro", }, 639 [DA9063_ID_BMEM] = { .name = "bmem", }, 640 [DA9063_ID_BIO] = { .name = "bio", }, 641 [DA9063_ID_BPERI] = { .name = "bperi", }, 642 [DA9063_ID_BCORES_MERGED] = { .name = "bcores-merged" }, 643 [DA9063_ID_BMEM_BIO_MERGED] = { .name = "bmem-bio-merged", }, 644 [DA9063_ID_LDO1] = { .name = "ldo1", }, 645 [DA9063_ID_LDO2] = { .name = "ldo2", }, 646 [DA9063_ID_LDO3] = { .name = "ldo3", }, 647 [DA9063_ID_LDO4] = { .name = "ldo4", }, 648 [DA9063_ID_LDO5] = { .name = "ldo5", }, 649 [DA9063_ID_LDO6] = { .name = "ldo6", }, 650 [DA9063_ID_LDO7] = { .name = "ldo7", }, 651 [DA9063_ID_LDO8] = { .name = "ldo8", }, 652 [DA9063_ID_LDO9] = { .name = "ldo9", }, 653 [DA9063_ID_LDO10] = { .name = "ldo10", }, 654 [DA9063_ID_LDO11] = { .name = "ldo11", }, 655 }; 656 657 static struct da9063_regulators_pdata *da9063_parse_regulators_dt( 658 struct platform_device *pdev, 659 struct of_regulator_match **da9063_reg_matches) 660 { 661 struct da9063_regulators_pdata *pdata; 662 struct da9063_regulator_data *rdata; 663 struct device_node *node; 664 int i, n, num; 665 666 node = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); 667 if (!node) { 668 dev_err(&pdev->dev, "Regulators device node not found\n"); 669 return ERR_PTR(-ENODEV); 670 } 671 672 num = of_regulator_match(&pdev->dev, node, da9063_matches, 673 ARRAY_SIZE(da9063_matches)); 674 of_node_put(node); 675 if (num < 0) { 676 dev_err(&pdev->dev, "Failed to match regulators\n"); 677 return ERR_PTR(-EINVAL); 678 } 679 680 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 681 if (!pdata) 682 return ERR_PTR(-ENOMEM); 683 684 pdata->regulator_data = devm_kzalloc(&pdev->dev, 685 num * sizeof(*pdata->regulator_data), 686 GFP_KERNEL); 687 if (!pdata->regulator_data) 688 return ERR_PTR(-ENOMEM); 689 pdata->n_regulators = num; 690 691 n = 0; 692 for (i = 0; i < ARRAY_SIZE(da9063_matches); i++) { 693 if (!da9063_matches[i].init_data) 694 continue; 695 696 rdata = &pdata->regulator_data[n]; 697 rdata->id = i; 698 rdata->initdata = da9063_matches[i].init_data; 699 700 n++; 701 } 702 703 *da9063_reg_matches = da9063_matches; 704 return pdata; 705 } 706 #else 707 static struct da9063_regulators_pdata *da9063_parse_regulators_dt( 708 struct platform_device *pdev, 709 struct of_regulator_match **da9063_reg_matches) 710 { 711 *da9063_reg_matches = NULL; 712 return ERR_PTR(-ENODEV); 713 } 714 #endif 715 716 static int da9063_regulator_probe(struct platform_device *pdev) 717 { 718 struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent); 719 struct da9063_pdata *da9063_pdata = dev_get_platdata(da9063->dev); 720 struct of_regulator_match *da9063_reg_matches = NULL; 721 struct da9063_regulators_pdata *regl_pdata; 722 const struct da9063_dev_model *model; 723 struct da9063_regulators *regulators; 724 struct da9063_regulator *regl; 725 struct regulator_config config; 726 bool bcores_merged, bmem_bio_merged; 727 int id, irq, n, n_regulators, ret, val; 728 size_t size; 729 730 regl_pdata = da9063_pdata ? da9063_pdata->regulators_pdata : NULL; 731 732 if (!regl_pdata) 733 regl_pdata = da9063_parse_regulators_dt(pdev, 734 &da9063_reg_matches); 735 736 if (IS_ERR(regl_pdata) || regl_pdata->n_regulators == 0) { 737 dev_err(&pdev->dev, 738 "No regulators defined for the platform\n"); 739 return PTR_ERR(regl_pdata); 740 } 741 742 /* Find regulators set for particular device model */ 743 for (model = regulators_models; model->regulator_info; model++) { 744 if (model->dev_model == da9063->model) 745 break; 746 } 747 if (!model->regulator_info) { 748 dev_err(&pdev->dev, "Chip model not recognised (%u)\n", 749 da9063->model); 750 return -ENODEV; 751 } 752 753 ret = regmap_read(da9063->regmap, DA9063_REG_CONFIG_H, &val); 754 if (ret < 0) { 755 dev_err(&pdev->dev, 756 "Error while reading BUCKs configuration\n"); 757 return ret; 758 } 759 bcores_merged = val & DA9063_BCORE_MERGE; 760 bmem_bio_merged = val & DA9063_BUCK_MERGE; 761 762 n_regulators = model->n_regulators; 763 if (bcores_merged) 764 n_regulators -= 2; /* remove BCORE1, BCORE2 */ 765 else 766 n_regulators--; /* remove BCORES_MERGED */ 767 if (bmem_bio_merged) 768 n_regulators -= 2; /* remove BMEM, BIO */ 769 else 770 n_regulators--; /* remove BMEM_BIO_MERGED */ 771 772 /* Allocate memory required by usable regulators */ 773 size = sizeof(struct da9063_regulators) + 774 n_regulators * sizeof(struct da9063_regulator); 775 regulators = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); 776 if (!regulators) 777 return -ENOMEM; 778 779 regulators->n_regulators = n_regulators; 780 platform_set_drvdata(pdev, regulators); 781 782 /* Register all regulators declared in platform information */ 783 n = 0; 784 id = 0; 785 while (n < regulators->n_regulators) { 786 /* Skip regulator IDs depending on merge mode configuration */ 787 switch (id) { 788 case DA9063_ID_BCORE1: 789 case DA9063_ID_BCORE2: 790 if (bcores_merged) { 791 id++; 792 continue; 793 } 794 break; 795 case DA9063_ID_BMEM: 796 case DA9063_ID_BIO: 797 if (bmem_bio_merged) { 798 id++; 799 continue; 800 } 801 break; 802 case DA9063_ID_BCORES_MERGED: 803 if (!bcores_merged) { 804 id++; 805 continue; 806 } 807 break; 808 case DA9063_ID_BMEM_BIO_MERGED: 809 if (!bmem_bio_merged) { 810 id++; 811 continue; 812 } 813 break; 814 } 815 816 /* Initialise regulator structure */ 817 regl = ®ulators->regulator[n]; 818 regl->hw = da9063; 819 regl->info = &model->regulator_info[id]; 820 regl->desc = regl->info->desc; 821 regl->desc.type = REGULATOR_VOLTAGE; 822 regl->desc.owner = THIS_MODULE; 823 824 if (regl->info->mode.reg) 825 regl->mode = devm_regmap_field_alloc(&pdev->dev, 826 da9063->regmap, regl->info->mode); 827 if (regl->info->suspend.reg) 828 regl->suspend = devm_regmap_field_alloc(&pdev->dev, 829 da9063->regmap, regl->info->suspend); 830 if (regl->info->sleep.reg) 831 regl->sleep = devm_regmap_field_alloc(&pdev->dev, 832 da9063->regmap, regl->info->sleep); 833 if (regl->info->suspend_sleep.reg) 834 regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev, 835 da9063->regmap, regl->info->suspend_sleep); 836 if (regl->info->ilimit.reg) 837 regl->ilimit = devm_regmap_field_alloc(&pdev->dev, 838 da9063->regmap, regl->info->ilimit); 839 840 /* Register regulator */ 841 memset(&config, 0, sizeof(config)); 842 config.dev = &pdev->dev; 843 config.init_data = da9063_get_regulator_initdata(regl_pdata, id); 844 config.driver_data = regl; 845 if (da9063_reg_matches) 846 config.of_node = da9063_reg_matches[id].of_node; 847 config.regmap = da9063->regmap; 848 regl->rdev = devm_regulator_register(&pdev->dev, ®l->desc, 849 &config); 850 if (IS_ERR(regl->rdev)) { 851 dev_err(&pdev->dev, 852 "Failed to register %s regulator\n", 853 regl->desc.name); 854 return PTR_ERR(regl->rdev); 855 } 856 id++; 857 n++; 858 } 859 860 /* LDOs overcurrent event support */ 861 irq = platform_get_irq_byname(pdev, "LDO_LIM"); 862 if (irq < 0) { 863 dev_err(&pdev->dev, "Failed to get IRQ.\n"); 864 return irq; 865 } 866 867 ret = devm_request_threaded_irq(&pdev->dev, irq, 868 NULL, da9063_ldo_lim_event, 869 IRQF_TRIGGER_LOW | IRQF_ONESHOT, 870 "LDO_LIM", regulators); 871 if (ret) { 872 dev_err(&pdev->dev, "Failed to request LDO_LIM IRQ.\n"); 873 return ret; 874 } 875 876 return 0; 877 } 878 879 static struct platform_driver da9063_regulator_driver = { 880 .driver = { 881 .name = DA9063_DRVNAME_REGULATORS, 882 }, 883 .probe = da9063_regulator_probe, 884 }; 885 886 static int __init da9063_regulator_init(void) 887 { 888 return platform_driver_register(&da9063_regulator_driver); 889 } 890 subsys_initcall(da9063_regulator_init); 891 892 static void __exit da9063_regulator_cleanup(void) 893 { 894 platform_driver_unregister(&da9063_regulator_driver); 895 } 896 module_exit(da9063_regulator_cleanup); 897 898 899 /* Module information */ 900 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>"); 901 MODULE_DESCRIPTION("DA9063 regulators driver"); 902 MODULE_LICENSE("GPL"); 903 MODULE_ALIAS("platform:" DA9063_DRVNAME_REGULATORS); 904