1 /* 2 * Regulator driver for DA9063 PMIC series 3 * 4 * Copyright 2012 Dialog Semiconductors Ltd. 5 * Copyright 2013 Philipp Zabel, Pengutronix 6 * 7 * Author: Krystian Garbaciak <krystian.garbaciak@diasemi.com> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 * 14 */ 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/init.h> 18 #include <linux/err.h> 19 #include <linux/slab.h> 20 #include <linux/of.h> 21 #include <linux/platform_device.h> 22 #include <linux/regmap.h> 23 #include <linux/regulator/driver.h> 24 #include <linux/regulator/machine.h> 25 #include <linux/regulator/of_regulator.h> 26 #include <linux/mfd/da9063/core.h> 27 #include <linux/mfd/da9063/pdata.h> 28 #include <linux/mfd/da9063/registers.h> 29 30 31 /* Definition for registering regmap bit fields using a mask */ 32 #define BFIELD(_reg, _mask) \ 33 REG_FIELD(_reg, __builtin_ffs((int)_mask) - 1, \ 34 sizeof(unsigned int) * 8 - __builtin_clz((_mask)) - 1) 35 36 /* Regulator capabilities and registers description */ 37 struct da9063_regulator_info { 38 struct regulator_desc desc; 39 40 /* Current limiting */ 41 unsigned n_current_limits; 42 const int *current_limits; 43 44 /* DA9063 main register fields */ 45 struct reg_field mode; /* buck mode of operation */ 46 struct reg_field suspend; 47 struct reg_field sleep; 48 struct reg_field suspend_sleep; 49 unsigned int suspend_vsel_reg; 50 struct reg_field ilimit; 51 52 /* DA9063 event detection bit */ 53 struct reg_field oc_event; 54 }; 55 56 /* Macros for LDO */ 57 #define DA9063_LDO(chip, regl_name, min_mV, step_mV, max_mV) \ 58 .desc.id = chip##_ID_##regl_name, \ 59 .desc.name = __stringify(chip##_##regl_name), \ 60 .desc.ops = &da9063_ldo_ops, \ 61 .desc.min_uV = (min_mV) * 1000, \ 62 .desc.uV_step = (step_mV) * 1000, \ 63 .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1), \ 64 .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \ 65 .desc.enable_mask = DA9063_LDO_EN, \ 66 .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \ 67 .desc.vsel_mask = DA9063_V##regl_name##_MASK, \ 68 .desc.linear_min_sel = DA9063_V##regl_name##_BIAS, \ 69 .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_LDO_SL), \ 70 .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_LDO_SL), \ 71 .suspend_vsel_reg = DA9063_REG_V##regl_name##_B 72 73 /* Macros for voltage DC/DC converters (BUCKs) */ 74 #define DA9063_BUCK(chip, regl_name, min_mV, step_mV, max_mV, limits_array) \ 75 .desc.id = chip##_ID_##regl_name, \ 76 .desc.name = __stringify(chip##_##regl_name), \ 77 .desc.ops = &da9063_buck_ops, \ 78 .desc.min_uV = (min_mV) * 1000, \ 79 .desc.uV_step = (step_mV) * 1000, \ 80 .desc.n_voltages = ((max_mV) - (min_mV))/(step_mV) + 1, \ 81 .current_limits = limits_array, \ 82 .n_current_limits = ARRAY_SIZE(limits_array) 83 84 #define DA9063_BUCK_COMMON_FIELDS(regl_name) \ 85 .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \ 86 .desc.enable_mask = DA9063_BUCK_EN, \ 87 .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \ 88 .desc.vsel_mask = DA9063_VBUCK_MASK, \ 89 .desc.linear_min_sel = DA9063_VBUCK_BIAS, \ 90 .sleep = BFIELD(DA9063_REG_V##regl_name##_A, DA9063_BUCK_SL), \ 91 .suspend_sleep = BFIELD(DA9063_REG_V##regl_name##_B, DA9063_BUCK_SL), \ 92 .suspend_vsel_reg = DA9063_REG_V##regl_name##_B, \ 93 .mode = BFIELD(DA9063_REG_##regl_name##_CFG, DA9063_BUCK_MODE_MASK) 94 95 /* Defines asignment of regulators info table to chip model */ 96 struct da9063_dev_model { 97 const struct da9063_regulator_info *regulator_info; 98 unsigned n_regulators; 99 unsigned dev_model; 100 }; 101 102 /* Single regulator settings */ 103 struct da9063_regulator { 104 struct regulator_desc desc; 105 struct regulator_dev *rdev; 106 struct da9063 *hw; 107 const struct da9063_regulator_info *info; 108 109 struct regmap_field *mode; 110 struct regmap_field *suspend; 111 struct regmap_field *sleep; 112 struct regmap_field *suspend_sleep; 113 struct regmap_field *ilimit; 114 }; 115 116 /* Encapsulates all information for the regulators driver */ 117 struct da9063_regulators { 118 int irq_ldo_lim; 119 int irq_uvov; 120 121 unsigned n_regulators; 122 /* Array size to be defined during init. Keep at end. */ 123 struct da9063_regulator regulator[0]; 124 }; 125 126 /* BUCK modes for DA9063 */ 127 enum { 128 BUCK_MODE_MANUAL, /* 0 */ 129 BUCK_MODE_SLEEP, /* 1 */ 130 BUCK_MODE_SYNC, /* 2 */ 131 BUCK_MODE_AUTO /* 3 */ 132 }; 133 134 /* Regulator operations */ 135 136 /* Current limits array (in uA) for BCORE1, BCORE2, BPRO. 137 Entry indexes corresponds to register values. */ 138 static const int da9063_buck_a_limits[] = { 139 500000, 600000, 700000, 800000, 900000, 1000000, 1100000, 1200000, 140 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1900000, 2000000 141 }; 142 143 /* Current limits array (in uA) for BMEM, BIO, BPERI. 144 Entry indexes corresponds to register values. */ 145 static const int da9063_buck_b_limits[] = { 146 1500000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000, 147 2300000, 2400000, 2500000, 2600000, 2700000, 2800000, 2900000, 3000000 148 }; 149 150 /* Current limits array (in uA) for merged BCORE1 and BCORE2. 151 Entry indexes corresponds to register values. */ 152 static const int da9063_bcores_merged_limits[] = { 153 1000000, 1200000, 1400000, 1600000, 1800000, 2000000, 2200000, 2400000, 154 2600000, 2800000, 3000000, 3200000, 3400000, 3600000, 3800000, 4000000 155 }; 156 157 /* Current limits array (in uA) for merged BMEM and BIO. 158 Entry indexes corresponds to register values. */ 159 static const int da9063_bmem_bio_merged_limits[] = { 160 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000, 161 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000 162 }; 163 164 static int da9063_set_current_limit(struct regulator_dev *rdev, 165 int min_uA, int max_uA) 166 { 167 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 168 const struct da9063_regulator_info *rinfo = regl->info; 169 int n, tval; 170 171 for (n = 0; n < rinfo->n_current_limits; n++) { 172 tval = rinfo->current_limits[n]; 173 if (tval >= min_uA && tval <= max_uA) 174 return regmap_field_write(regl->ilimit, n); 175 } 176 177 return -EINVAL; 178 } 179 180 static int da9063_get_current_limit(struct regulator_dev *rdev) 181 { 182 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 183 const struct da9063_regulator_info *rinfo = regl->info; 184 unsigned int sel; 185 int ret; 186 187 ret = regmap_field_read(regl->ilimit, &sel); 188 if (ret < 0) 189 return ret; 190 191 if (sel >= rinfo->n_current_limits) 192 sel = rinfo->n_current_limits - 1; 193 194 return rinfo->current_limits[sel]; 195 } 196 197 static int da9063_buck_set_mode(struct regulator_dev *rdev, unsigned mode) 198 { 199 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 200 unsigned val; 201 202 switch (mode) { 203 case REGULATOR_MODE_FAST: 204 val = BUCK_MODE_SYNC; 205 break; 206 case REGULATOR_MODE_NORMAL: 207 val = BUCK_MODE_AUTO; 208 break; 209 case REGULATOR_MODE_STANDBY: 210 val = BUCK_MODE_SLEEP; 211 break; 212 default: 213 return -EINVAL; 214 } 215 216 return regmap_field_write(regl->mode, val); 217 } 218 219 /* 220 * Bucks use single mode register field for normal operation 221 * and suspend state. 222 * There are 3 modes to map to: FAST, NORMAL, and STANDBY. 223 */ 224 225 static unsigned da9063_buck_get_mode(struct regulator_dev *rdev) 226 { 227 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 228 struct regmap_field *field; 229 unsigned int val, mode = 0; 230 int ret; 231 232 ret = regmap_field_read(regl->mode, &val); 233 if (ret < 0) 234 return ret; 235 236 switch (val) { 237 default: 238 case BUCK_MODE_MANUAL: 239 mode = REGULATOR_MODE_FAST | REGULATOR_MODE_STANDBY; 240 /* Sleep flag bit decides the mode */ 241 break; 242 case BUCK_MODE_SLEEP: 243 return REGULATOR_MODE_STANDBY; 244 case BUCK_MODE_SYNC: 245 return REGULATOR_MODE_FAST; 246 case BUCK_MODE_AUTO: 247 return REGULATOR_MODE_NORMAL; 248 } 249 250 /* Detect current regulator state */ 251 ret = regmap_field_read(regl->suspend, &val); 252 if (ret < 0) 253 return 0; 254 255 /* Read regulator mode from proper register, depending on state */ 256 if (val) 257 field = regl->suspend_sleep; 258 else 259 field = regl->sleep; 260 261 ret = regmap_field_read(field, &val); 262 if (ret < 0) 263 return 0; 264 265 if (val) 266 mode &= REGULATOR_MODE_STANDBY; 267 else 268 mode &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_FAST; 269 270 return mode; 271 } 272 273 /* 274 * LDOs use sleep flags - one for normal and one for suspend state. 275 * There are 2 modes to map to: NORMAL and STANDBY (sleep) for each state. 276 */ 277 278 static int da9063_ldo_set_mode(struct regulator_dev *rdev, unsigned mode) 279 { 280 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 281 unsigned val; 282 283 switch (mode) { 284 case REGULATOR_MODE_NORMAL: 285 val = 0; 286 break; 287 case REGULATOR_MODE_STANDBY: 288 val = 1; 289 break; 290 default: 291 return -EINVAL; 292 } 293 294 return regmap_field_write(regl->sleep, val); 295 } 296 297 static unsigned da9063_ldo_get_mode(struct regulator_dev *rdev) 298 { 299 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 300 struct regmap_field *field; 301 int ret, val; 302 303 /* Detect current regulator state */ 304 ret = regmap_field_read(regl->suspend, &val); 305 if (ret < 0) 306 return 0; 307 308 /* Read regulator mode from proper register, depending on state */ 309 if (val) 310 field = regl->suspend_sleep; 311 else 312 field = regl->sleep; 313 314 ret = regmap_field_read(field, &val); 315 if (ret < 0) 316 return 0; 317 318 if (val) 319 return REGULATOR_MODE_STANDBY; 320 else 321 return REGULATOR_MODE_NORMAL; 322 } 323 324 static int da9063_buck_get_status(struct regulator_dev *rdev) 325 { 326 int ret = regulator_is_enabled_regmap(rdev); 327 328 if (ret == 0) { 329 ret = REGULATOR_STATUS_OFF; 330 } else if (ret > 0) { 331 ret = da9063_buck_get_mode(rdev); 332 if (ret > 0) 333 ret = regulator_mode_to_status(ret); 334 else if (ret == 0) 335 ret = -EIO; 336 } 337 338 return ret; 339 } 340 341 static int da9063_ldo_get_status(struct regulator_dev *rdev) 342 { 343 int ret = regulator_is_enabled_regmap(rdev); 344 345 if (ret == 0) { 346 ret = REGULATOR_STATUS_OFF; 347 } else if (ret > 0) { 348 ret = da9063_ldo_get_mode(rdev); 349 if (ret > 0) 350 ret = regulator_mode_to_status(ret); 351 else if (ret == 0) 352 ret = -EIO; 353 } 354 355 return ret; 356 } 357 358 static int da9063_set_suspend_voltage(struct regulator_dev *rdev, int uV) 359 { 360 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 361 const struct da9063_regulator_info *rinfo = regl->info; 362 int ret, sel; 363 364 sel = regulator_map_voltage_linear(rdev, uV, uV); 365 if (sel < 0) 366 return -EINVAL; 367 368 sel <<= ffs(rdev->desc->vsel_mask) - 1; 369 370 ret = regmap_update_bits(regl->hw->regmap, rinfo->suspend_vsel_reg, 371 rdev->desc->vsel_mask, sel); 372 373 return ret; 374 } 375 376 static int da9063_suspend_enable(struct regulator_dev *rdev) 377 { 378 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 379 380 return regmap_field_write(regl->suspend, 1); 381 } 382 383 static int da9063_suspend_disable(struct regulator_dev *rdev) 384 { 385 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 386 387 return regmap_field_write(regl->suspend, 0); 388 } 389 390 static int da9063_buck_set_suspend_mode(struct regulator_dev *rdev, unsigned mode) 391 { 392 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 393 int val; 394 395 switch (mode) { 396 case REGULATOR_MODE_FAST: 397 val = BUCK_MODE_SYNC; 398 break; 399 case REGULATOR_MODE_NORMAL: 400 val = BUCK_MODE_AUTO; 401 break; 402 case REGULATOR_MODE_STANDBY: 403 val = BUCK_MODE_SLEEP; 404 break; 405 default: 406 return -EINVAL; 407 } 408 409 return regmap_field_write(regl->mode, val); 410 } 411 412 static int da9063_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned mode) 413 { 414 struct da9063_regulator *regl = rdev_get_drvdata(rdev); 415 unsigned val; 416 417 switch (mode) { 418 case REGULATOR_MODE_NORMAL: 419 val = 0; 420 break; 421 case REGULATOR_MODE_STANDBY: 422 val = 1; 423 break; 424 default: 425 return -EINVAL; 426 } 427 428 return regmap_field_write(regl->suspend_sleep, val); 429 } 430 431 static struct regulator_ops da9063_buck_ops = { 432 .enable = regulator_enable_regmap, 433 .disable = regulator_disable_regmap, 434 .is_enabled = regulator_is_enabled_regmap, 435 .get_voltage_sel = regulator_get_voltage_sel_regmap, 436 .set_voltage_sel = regulator_set_voltage_sel_regmap, 437 .list_voltage = regulator_list_voltage_linear, 438 .set_current_limit = da9063_set_current_limit, 439 .get_current_limit = da9063_get_current_limit, 440 .set_mode = da9063_buck_set_mode, 441 .get_mode = da9063_buck_get_mode, 442 .get_status = da9063_buck_get_status, 443 .set_suspend_voltage = da9063_set_suspend_voltage, 444 .set_suspend_enable = da9063_suspend_enable, 445 .set_suspend_disable = da9063_suspend_disable, 446 .set_suspend_mode = da9063_buck_set_suspend_mode, 447 }; 448 449 static struct regulator_ops da9063_ldo_ops = { 450 .enable = regulator_enable_regmap, 451 .disable = regulator_disable_regmap, 452 .is_enabled = regulator_is_enabled_regmap, 453 .get_voltage_sel = regulator_get_voltage_sel_regmap, 454 .set_voltage_sel = regulator_set_voltage_sel_regmap, 455 .list_voltage = regulator_list_voltage_linear, 456 .set_mode = da9063_ldo_set_mode, 457 .get_mode = da9063_ldo_get_mode, 458 .get_status = da9063_ldo_get_status, 459 .set_suspend_voltage = da9063_set_suspend_voltage, 460 .set_suspend_enable = da9063_suspend_enable, 461 .set_suspend_disable = da9063_suspend_disable, 462 .set_suspend_mode = da9063_ldo_set_suspend_mode, 463 }; 464 465 /* Info of regulators for DA9063 */ 466 static const struct da9063_regulator_info da9063_regulator_info[] = { 467 { 468 DA9063_BUCK(DA9063, BCORE1, 300, 10, 1570, 469 da9063_buck_a_limits), 470 DA9063_BUCK_COMMON_FIELDS(BCORE1), 471 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL), 472 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C, 473 DA9063_BCORE1_ILIM_MASK), 474 }, 475 { 476 DA9063_BUCK(DA9063, BCORE2, 300, 10, 1570, 477 da9063_buck_a_limits), 478 DA9063_BUCK_COMMON_FIELDS(BCORE2), 479 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE2_SEL), 480 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C, 481 DA9063_BCORE2_ILIM_MASK), 482 }, 483 { 484 DA9063_BUCK(DA9063, BPRO, 530, 10, 1800, 485 da9063_buck_a_limits), 486 DA9063_BUCK_COMMON_FIELDS(BPRO), 487 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPRO_SEL), 488 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B, 489 DA9063_BPRO_ILIM_MASK), 490 }, 491 { 492 DA9063_BUCK(DA9063, BMEM, 800, 20, 3340, 493 da9063_buck_b_limits), 494 DA9063_BUCK_COMMON_FIELDS(BMEM), 495 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL), 496 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A, 497 DA9063_BMEM_ILIM_MASK), 498 }, 499 { 500 DA9063_BUCK(DA9063, BIO, 800, 20, 3340, 501 da9063_buck_b_limits), 502 DA9063_BUCK_COMMON_FIELDS(BIO), 503 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VBIO_SEL), 504 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A, 505 DA9063_BIO_ILIM_MASK), 506 }, 507 { 508 DA9063_BUCK(DA9063, BPERI, 800, 20, 3340, 509 da9063_buck_b_limits), 510 DA9063_BUCK_COMMON_FIELDS(BPERI), 511 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBPERI_SEL), 512 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_B, 513 DA9063_BPERI_ILIM_MASK), 514 }, 515 { 516 DA9063_BUCK(DA9063, BCORES_MERGED, 300, 10, 1570, 517 da9063_bcores_merged_limits), 518 /* BCORES_MERGED uses the same register fields as BCORE1 */ 519 DA9063_BUCK_COMMON_FIELDS(BCORE1), 520 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBCORE1_SEL), 521 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_C, 522 DA9063_BCORE1_ILIM_MASK), 523 }, 524 { 525 DA9063_BUCK(DA9063, BMEM_BIO_MERGED, 800, 20, 3340, 526 da9063_bmem_bio_merged_limits), 527 /* BMEM_BIO_MERGED uses the same register fields as BMEM */ 528 DA9063_BUCK_COMMON_FIELDS(BMEM), 529 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VBMEM_SEL), 530 .ilimit = BFIELD(DA9063_REG_BUCK_ILIM_A, 531 DA9063_BMEM_ILIM_MASK), 532 }, 533 { 534 DA9063_LDO(DA9063, LDO1, 600, 20, 1860), 535 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO1_SEL), 536 }, 537 { 538 DA9063_LDO(DA9063, LDO2, 600, 20, 1860), 539 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO2_SEL), 540 }, 541 { 542 DA9063_LDO(DA9063, LDO3, 900, 20, 3440), 543 .suspend = BFIELD(DA9063_REG_DVC_1, DA9063_VLDO3_SEL), 544 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO3_LIM), 545 }, 546 { 547 DA9063_LDO(DA9063, LDO4, 900, 20, 3440), 548 .suspend = BFIELD(DA9063_REG_DVC_2, DA9063_VLDO4_SEL), 549 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO4_LIM), 550 }, 551 { 552 DA9063_LDO(DA9063, LDO5, 900, 50, 3600), 553 .suspend = BFIELD(DA9063_REG_LDO5_CONT, DA9063_VLDO5_SEL), 554 }, 555 { 556 DA9063_LDO(DA9063, LDO6, 900, 50, 3600), 557 .suspend = BFIELD(DA9063_REG_LDO6_CONT, DA9063_VLDO6_SEL), 558 }, 559 { 560 DA9063_LDO(DA9063, LDO7, 900, 50, 3600), 561 .suspend = BFIELD(DA9063_REG_LDO7_CONT, DA9063_VLDO7_SEL), 562 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO7_LIM), 563 }, 564 { 565 DA9063_LDO(DA9063, LDO8, 900, 50, 3600), 566 .suspend = BFIELD(DA9063_REG_LDO8_CONT, DA9063_VLDO8_SEL), 567 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO8_LIM), 568 }, 569 { 570 DA9063_LDO(DA9063, LDO9, 950, 50, 3600), 571 .suspend = BFIELD(DA9063_REG_LDO9_CONT, DA9063_VLDO9_SEL), 572 }, 573 { 574 DA9063_LDO(DA9063, LDO10, 900, 50, 3600), 575 .suspend = BFIELD(DA9063_REG_LDO10_CONT, DA9063_VLDO10_SEL), 576 }, 577 { 578 DA9063_LDO(DA9063, LDO11, 900, 50, 3600), 579 .suspend = BFIELD(DA9063_REG_LDO11_CONT, DA9063_VLDO11_SEL), 580 .oc_event = BFIELD(DA9063_REG_STATUS_D, DA9063_LDO11_LIM), 581 }, 582 }; 583 584 /* Link chip model with regulators info table */ 585 static struct da9063_dev_model regulators_models[] = { 586 { 587 .regulator_info = da9063_regulator_info, 588 .n_regulators = ARRAY_SIZE(da9063_regulator_info), 589 .dev_model = PMIC_DA9063, 590 }, 591 { } 592 }; 593 594 /* Regulator interrupt handlers */ 595 static irqreturn_t da9063_ldo_lim_event(int irq, void *data) 596 { 597 struct da9063_regulators *regulators = data; 598 struct da9063 *hw = regulators->regulator[0].hw; 599 struct da9063_regulator *regl; 600 int bits, i , ret; 601 602 ret = regmap_read(hw->regmap, DA9063_REG_STATUS_D, &bits); 603 if (ret < 0) 604 return IRQ_NONE; 605 606 for (i = regulators->n_regulators - 1; i >= 0; i--) { 607 regl = ®ulators->regulator[i]; 608 if (regl->info->oc_event.reg != DA9063_REG_STATUS_D) 609 continue; 610 611 if (BIT(regl->info->oc_event.lsb) & bits) 612 regulator_notifier_call_chain(regl->rdev, 613 REGULATOR_EVENT_OVER_CURRENT, NULL); 614 } 615 616 return IRQ_HANDLED; 617 } 618 619 /* 620 * Probing and Initialisation functions 621 */ 622 static const struct regulator_init_data *da9063_get_regulator_initdata( 623 const struct da9063_regulators_pdata *regl_pdata, int id) 624 { 625 int i; 626 627 for (i = 0; i < regl_pdata->n_regulators; i++) { 628 if (id == regl_pdata->regulator_data[i].id) 629 return regl_pdata->regulator_data[i].initdata; 630 } 631 632 return NULL; 633 } 634 635 #ifdef CONFIG_OF 636 static struct of_regulator_match da9063_matches[] = { 637 [DA9063_ID_BCORE1] = { .name = "bcore1" }, 638 [DA9063_ID_BCORE2] = { .name = "bcore2" }, 639 [DA9063_ID_BPRO] = { .name = "bpro", }, 640 [DA9063_ID_BMEM] = { .name = "bmem", }, 641 [DA9063_ID_BIO] = { .name = "bio", }, 642 [DA9063_ID_BPERI] = { .name = "bperi", }, 643 [DA9063_ID_BCORES_MERGED] = { .name = "bcores-merged" }, 644 [DA9063_ID_BMEM_BIO_MERGED] = { .name = "bmem-bio-merged", }, 645 [DA9063_ID_LDO1] = { .name = "ldo1", }, 646 [DA9063_ID_LDO2] = { .name = "ldo2", }, 647 [DA9063_ID_LDO3] = { .name = "ldo3", }, 648 [DA9063_ID_LDO4] = { .name = "ldo4", }, 649 [DA9063_ID_LDO5] = { .name = "ldo5", }, 650 [DA9063_ID_LDO6] = { .name = "ldo6", }, 651 [DA9063_ID_LDO7] = { .name = "ldo7", }, 652 [DA9063_ID_LDO8] = { .name = "ldo8", }, 653 [DA9063_ID_LDO9] = { .name = "ldo9", }, 654 [DA9063_ID_LDO10] = { .name = "ldo10", }, 655 [DA9063_ID_LDO11] = { .name = "ldo11", }, 656 }; 657 658 static struct da9063_regulators_pdata *da9063_parse_regulators_dt( 659 struct platform_device *pdev, 660 struct of_regulator_match **da9063_reg_matches) 661 { 662 struct da9063_regulators_pdata *pdata; 663 struct da9063_regulator_data *rdata; 664 struct device_node *node; 665 int i, n, num; 666 667 node = of_find_node_by_name(pdev->dev.parent->of_node, "regulators"); 668 if (!node) { 669 dev_err(&pdev->dev, "Regulators device node not found\n"); 670 return ERR_PTR(-ENODEV); 671 } 672 673 num = of_regulator_match(&pdev->dev, node, da9063_matches, 674 ARRAY_SIZE(da9063_matches)); 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 PTR_ERR(-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; 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 -EIO; 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 dev_err(&pdev->dev, "No memory for regulators\n"); 778 return -ENOMEM; 779 } 780 781 regulators->n_regulators = n_regulators; 782 platform_set_drvdata(pdev, regulators); 783 784 /* Register all regulators declared in platform information */ 785 n = 0; 786 id = 0; 787 while (n < regulators->n_regulators) { 788 /* Skip regulator IDs depending on merge mode configuration */ 789 switch (id) { 790 case DA9063_ID_BCORE1: 791 case DA9063_ID_BCORE2: 792 if (bcores_merged) { 793 id++; 794 continue; 795 } 796 break; 797 case DA9063_ID_BMEM: 798 case DA9063_ID_BIO: 799 if (bmem_bio_merged) { 800 id++; 801 continue; 802 } 803 break; 804 case DA9063_ID_BCORES_MERGED: 805 if (!bcores_merged) { 806 id++; 807 continue; 808 } 809 break; 810 case DA9063_ID_BMEM_BIO_MERGED: 811 if (!bmem_bio_merged) { 812 id++; 813 continue; 814 } 815 break; 816 } 817 818 /* Initialise regulator structure */ 819 regl = ®ulators->regulator[n]; 820 regl->hw = da9063; 821 regl->info = &model->regulator_info[id]; 822 regl->desc = regl->info->desc; 823 regl->desc.type = REGULATOR_VOLTAGE; 824 regl->desc.owner = THIS_MODULE; 825 826 if (regl->info->mode.reg) 827 regl->mode = devm_regmap_field_alloc(&pdev->dev, 828 da9063->regmap, regl->info->mode); 829 if (regl->info->suspend.reg) 830 regl->suspend = devm_regmap_field_alloc(&pdev->dev, 831 da9063->regmap, regl->info->suspend); 832 if (regl->info->sleep.reg) 833 regl->sleep = devm_regmap_field_alloc(&pdev->dev, 834 da9063->regmap, regl->info->sleep); 835 if (regl->info->suspend_sleep.reg) 836 regl->suspend_sleep = devm_regmap_field_alloc(&pdev->dev, 837 da9063->regmap, regl->info->suspend_sleep); 838 if (regl->info->ilimit.reg) 839 regl->ilimit = devm_regmap_field_alloc(&pdev->dev, 840 da9063->regmap, regl->info->ilimit); 841 842 /* Register regulator */ 843 memset(&config, 0, sizeof(config)); 844 config.dev = &pdev->dev; 845 config.init_data = da9063_get_regulator_initdata(regl_pdata, id); 846 config.driver_data = regl; 847 if (da9063_reg_matches) 848 config.of_node = da9063_reg_matches[id].of_node; 849 config.regmap = da9063->regmap; 850 regl->rdev = regulator_register(®l->desc, &config); 851 if (IS_ERR(regl->rdev)) { 852 dev_err(&pdev->dev, 853 "Failed to register %s regulator\n", 854 regl->desc.name); 855 ret = PTR_ERR(regl->rdev); 856 goto err; 857 } 858 id++; 859 n++; 860 } 861 862 /* LDOs overcurrent event support */ 863 irq = platform_get_irq_byname(pdev, "LDO_LIM"); 864 if (irq < 0) { 865 ret = irq; 866 dev_err(&pdev->dev, "Failed to get IRQ.\n"); 867 goto err; 868 } 869 870 regulators->irq_ldo_lim = regmap_irq_get_virq(da9063->regmap_irq, irq); 871 if (regulators->irq_ldo_lim >= 0) { 872 ret = request_threaded_irq(regulators->irq_ldo_lim, 873 NULL, da9063_ldo_lim_event, 874 IRQF_TRIGGER_LOW | IRQF_ONESHOT, 875 "LDO_LIM", regulators); 876 if (ret) { 877 dev_err(&pdev->dev, 878 "Failed to request LDO_LIM IRQ.\n"); 879 regulators->irq_ldo_lim = -ENXIO; 880 } 881 } 882 883 return 0; 884 885 err: 886 /* Wind back regulators registeration */ 887 while (--n >= 0) 888 regulator_unregister(regulators->regulator[n].rdev); 889 890 return ret; 891 } 892 893 static int da9063_regulator_remove(struct platform_device *pdev) 894 { 895 struct da9063_regulators *regulators = platform_get_drvdata(pdev); 896 struct da9063_regulator *regl; 897 898 free_irq(regulators->irq_ldo_lim, regulators); 899 free_irq(regulators->irq_uvov, regulators); 900 901 for (regl = ®ulators->regulator[regulators->n_regulators - 1]; 902 regl >= ®ulators->regulator[0]; regl--) 903 regulator_unregister(regl->rdev); 904 905 return 0; 906 } 907 908 static struct platform_driver da9063_regulator_driver = { 909 .driver = { 910 .name = DA9063_DRVNAME_REGULATORS, 911 .owner = THIS_MODULE, 912 }, 913 .probe = da9063_regulator_probe, 914 .remove = da9063_regulator_remove, 915 }; 916 917 static int __init da9063_regulator_init(void) 918 { 919 return platform_driver_register(&da9063_regulator_driver); 920 } 921 subsys_initcall(da9063_regulator_init); 922 923 static void __exit da9063_regulator_cleanup(void) 924 { 925 platform_driver_unregister(&da9063_regulator_driver); 926 } 927 module_exit(da9063_regulator_cleanup); 928 929 930 /* Module information */ 931 MODULE_AUTHOR("Krystian Garbaciak <krystian.garbaciak@diasemi.com>"); 932 MODULE_DESCRIPTION("DA9063 regulators driver"); 933 MODULE_LICENSE("GPL"); 934 MODULE_ALIAS("paltform:" DA9063_DRVNAME_REGULATORS); 935