1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (C) 2020 ROHM Semiconductors 3 // ROHM BD9576MUF/BD9573MUF regulator driver 4 5 #include <linux/err.h> 6 #include <linux/gpio/consumer.h> 7 #include <linux/interrupt.h> 8 #include <linux/jiffies.h> 9 #include <linux/kernel.h> 10 #include <linux/mfd/rohm-bd957x.h> 11 #include <linux/mfd/rohm-generic.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/platform_device.h> 15 #include <linux/property.h> 16 #include <linux/regulator/driver.h> 17 #include <linux/regulator/machine.h> 18 #include <linux/regulator/of_regulator.h> 19 #include <linux/slab.h> 20 #include <linux/spinlock.h> 21 #include <linux/workqueue.h> 22 23 #define BD957X_VOUTS1_VOLT 3300000 24 #define BD957X_VOUTS4_BASE_VOLT 1030000 25 #define BD957X_VOUTS34_NUM_VOLT 32 26 27 #define BD9576_THERM_IRQ_MASK_TW BIT(5) 28 #define BD9576_xVD_IRQ_MASK_VOUTL1 BIT(5) 29 #define BD9576_UVD_IRQ_MASK_VOUTS1_OCW BIT(6) 30 #define BD9576_xVD_IRQ_MASK_VOUT1TO4 0x0F 31 32 static const unsigned int vout1_volt_table[] = { 33 5000000, 4900000, 4800000, 4700000, 4600000, 34 4500000, 4500000, 4500000, 5000000, 5100000, 35 5200000, 5300000, 5400000, 5500000, 5500000, 36 5500000 37 }; 38 39 static const unsigned int vout2_volt_table[] = { 40 1800000, 1780000, 1760000, 1740000, 1720000, 41 1700000, 1680000, 1660000, 1800000, 1820000, 42 1840000, 1860000, 1880000, 1900000, 1920000, 43 1940000 44 }; 45 46 static const unsigned int voutl1_volt_table[] = { 47 2500000, 2540000, 2580000, 2620000, 2660000, 48 2700000, 2740000, 2780000, 2500000, 2460000, 49 2420000, 2380000, 2340000, 2300000, 2260000, 50 2220000 51 }; 52 53 static const struct linear_range vout1_xvd_ranges[] = { 54 REGULATOR_LINEAR_RANGE(225000, 0x01, 0x2b, 0), 55 REGULATOR_LINEAR_RANGE(225000, 0x2c, 0x54, 5000), 56 REGULATOR_LINEAR_RANGE(425000, 0x55, 0x7f, 0), 57 }; 58 59 static const struct linear_range vout234_xvd_ranges[] = { 60 REGULATOR_LINEAR_RANGE(17000, 0x01, 0x0f, 0), 61 REGULATOR_LINEAR_RANGE(17000, 0x10, 0x6d, 1000), 62 REGULATOR_LINEAR_RANGE(110000, 0x6e, 0x7f, 0), 63 }; 64 65 static const struct linear_range voutL1_xvd_ranges[] = { 66 REGULATOR_LINEAR_RANGE(34000, 0x01, 0x0f, 0), 67 REGULATOR_LINEAR_RANGE(34000, 0x10, 0x6d, 2000), 68 REGULATOR_LINEAR_RANGE(220000, 0x6e, 0x7f, 0), 69 }; 70 71 static struct linear_range voutS1_ocw_ranges_internal[] = { 72 REGULATOR_LINEAR_RANGE(200000, 0x01, 0x04, 0), 73 REGULATOR_LINEAR_RANGE(250000, 0x05, 0x18, 50000), 74 REGULATOR_LINEAR_RANGE(1200000, 0x19, 0x3f, 0), 75 }; 76 77 static struct linear_range voutS1_ocw_ranges[] = { 78 REGULATOR_LINEAR_RANGE(50000, 0x01, 0x04, 0), 79 REGULATOR_LINEAR_RANGE(60000, 0x05, 0x18, 10000), 80 REGULATOR_LINEAR_RANGE(250000, 0x19, 0x3f, 0), 81 }; 82 83 static struct linear_range voutS1_ocp_ranges_internal[] = { 84 REGULATOR_LINEAR_RANGE(300000, 0x01, 0x06, 0), 85 REGULATOR_LINEAR_RANGE(350000, 0x7, 0x1b, 50000), 86 REGULATOR_LINEAR_RANGE(1350000, 0x1c, 0x3f, 0), 87 }; 88 89 static struct linear_range voutS1_ocp_ranges[] = { 90 REGULATOR_LINEAR_RANGE(70000, 0x01, 0x06, 0), 91 REGULATOR_LINEAR_RANGE(80000, 0x7, 0x1b, 10000), 92 REGULATOR_LINEAR_RANGE(280000, 0x1c, 0x3f, 0), 93 }; 94 95 struct bd957x_regulator_data { 96 struct regulator_desc desc; 97 int base_voltage; 98 struct regulator_dev *rdev; 99 int ovd_notif; 100 int uvd_notif; 101 int temp_notif; 102 int ovd_err; 103 int uvd_err; 104 int temp_err; 105 const struct linear_range *xvd_ranges; 106 int num_xvd_ranges; 107 bool oc_supported; 108 unsigned int ovd_reg; 109 unsigned int uvd_reg; 110 unsigned int xvd_mask; 111 unsigned int ocp_reg; 112 unsigned int ocp_mask; 113 unsigned int ocw_reg; 114 unsigned int ocw_mask; 115 unsigned int ocw_rfet; 116 }; 117 118 #define BD9576_NUM_REGULATORS 6 119 #define BD9576_NUM_OVD_REGULATORS 5 120 121 struct bd957x_data { 122 struct bd957x_regulator_data regulator_data[BD9576_NUM_REGULATORS]; 123 struct regmap *regmap; 124 struct delayed_work therm_irq_suppress; 125 struct delayed_work ovd_irq_suppress; 126 struct delayed_work uvd_irq_suppress; 127 unsigned int therm_irq; 128 unsigned int ovd_irq; 129 unsigned int uvd_irq; 130 spinlock_t err_lock; 131 int regulator_global_err; 132 }; 133 bd957x_vout34_list_voltage(struct regulator_dev * rdev,unsigned int selector)134 static int bd957x_vout34_list_voltage(struct regulator_dev *rdev, 135 unsigned int selector) 136 { 137 const struct regulator_desc *desc = rdev->desc; 138 int multiplier = selector & desc->vsel_mask & 0x7f; 139 int tune; 140 141 /* VOUT3 and 4 has 10mV step */ 142 tune = multiplier * 10000; 143 144 if (!(selector & 0x80)) 145 return desc->fixed_uV - tune; 146 147 return desc->fixed_uV + tune; 148 } 149 bd957x_list_voltage(struct regulator_dev * rdev,unsigned int selector)150 static int bd957x_list_voltage(struct regulator_dev *rdev, 151 unsigned int selector) 152 { 153 const struct regulator_desc *desc = rdev->desc; 154 int index = selector & desc->vsel_mask & 0x7f; 155 156 if (!(selector & 0x80)) 157 index += desc->n_voltages/2; 158 159 if (index >= desc->n_voltages) 160 return -EINVAL; 161 162 return desc->volt_table[index]; 163 } 164 bd9576_fill_ovd_flags(struct bd957x_regulator_data * data,bool warn)165 static void bd9576_fill_ovd_flags(struct bd957x_regulator_data *data, 166 bool warn) 167 { 168 if (warn) { 169 data->ovd_notif = REGULATOR_EVENT_OVER_VOLTAGE_WARN; 170 data->ovd_err = REGULATOR_ERROR_OVER_VOLTAGE_WARN; 171 } else { 172 data->ovd_notif = REGULATOR_EVENT_REGULATION_OUT; 173 data->ovd_err = REGULATOR_ERROR_REGULATION_OUT; 174 } 175 } 176 bd9576_fill_ocp_flags(struct bd957x_regulator_data * data,bool warn)177 static void bd9576_fill_ocp_flags(struct bd957x_regulator_data *data, 178 bool warn) 179 { 180 if (warn) { 181 data->uvd_notif = REGULATOR_EVENT_OVER_CURRENT_WARN; 182 data->uvd_err = REGULATOR_ERROR_OVER_CURRENT_WARN; 183 } else { 184 data->uvd_notif = REGULATOR_EVENT_OVER_CURRENT; 185 data->uvd_err = REGULATOR_ERROR_OVER_CURRENT; 186 } 187 } 188 bd9576_fill_uvd_flags(struct bd957x_regulator_data * data,bool warn)189 static void bd9576_fill_uvd_flags(struct bd957x_regulator_data *data, 190 bool warn) 191 { 192 if (warn) { 193 data->uvd_notif = REGULATOR_EVENT_UNDER_VOLTAGE_WARN; 194 data->uvd_err = REGULATOR_ERROR_UNDER_VOLTAGE_WARN; 195 } else { 196 data->uvd_notif = REGULATOR_EVENT_UNDER_VOLTAGE; 197 data->uvd_err = REGULATOR_ERROR_UNDER_VOLTAGE; 198 } 199 } 200 bd9576_fill_temp_flags(struct bd957x_regulator_data * data,bool enable,bool warn)201 static void bd9576_fill_temp_flags(struct bd957x_regulator_data *data, 202 bool enable, bool warn) 203 { 204 if (!enable) { 205 data->temp_notif = 0; 206 data->temp_err = 0; 207 } else if (warn) { 208 data->temp_notif = REGULATOR_EVENT_OVER_TEMP_WARN; 209 data->temp_err = REGULATOR_ERROR_OVER_TEMP_WARN; 210 } else { 211 data->temp_notif = REGULATOR_EVENT_OVER_TEMP; 212 data->temp_err = REGULATOR_ERROR_OVER_TEMP; 213 } 214 } 215 bd9576_set_limit(const struct linear_range * r,int num_ranges,struct regmap * regmap,int reg,int mask,int lim)216 static int bd9576_set_limit(const struct linear_range *r, int num_ranges, 217 struct regmap *regmap, int reg, int mask, int lim) 218 { 219 int ret; 220 bool found; 221 int sel = 0; 222 223 if (lim) { 224 225 ret = linear_range_get_selector_low_array(r, num_ranges, 226 lim, &sel, &found); 227 if (ret) 228 return ret; 229 230 if (!found) 231 dev_warn(regmap_get_device(regmap), 232 "limit %d out of range. Setting lower\n", 233 lim); 234 } 235 236 return regmap_update_bits(regmap, reg, mask, sel); 237 } 238 check_ocp_flag_mismatch(struct regulator_dev * rdev,int severity,struct bd957x_regulator_data * r)239 static bool check_ocp_flag_mismatch(struct regulator_dev *rdev, int severity, 240 struct bd957x_regulator_data *r) 241 { 242 if ((severity == REGULATOR_SEVERITY_ERR && 243 r->uvd_notif != REGULATOR_EVENT_OVER_CURRENT) || 244 (severity == REGULATOR_SEVERITY_WARN && 245 r->uvd_notif != REGULATOR_EVENT_OVER_CURRENT_WARN)) { 246 dev_warn(rdev_get_dev(rdev), 247 "Can't support both OCP WARN and ERR\n"); 248 /* Do not overwrite ERR config with WARN */ 249 if (severity == REGULATOR_SEVERITY_WARN) 250 return true; 251 252 bd9576_fill_ocp_flags(r, 0); 253 } 254 255 return false; 256 } 257 check_uvd_flag_mismatch(struct regulator_dev * rdev,int severity,struct bd957x_regulator_data * r)258 static bool check_uvd_flag_mismatch(struct regulator_dev *rdev, int severity, 259 struct bd957x_regulator_data *r) 260 { 261 if ((severity == REGULATOR_SEVERITY_ERR && 262 r->uvd_notif != REGULATOR_EVENT_UNDER_VOLTAGE) || 263 (severity == REGULATOR_SEVERITY_WARN && 264 r->uvd_notif != REGULATOR_EVENT_UNDER_VOLTAGE_WARN)) { 265 dev_warn(rdev_get_dev(rdev), 266 "Can't support both UVD WARN and ERR\n"); 267 if (severity == REGULATOR_SEVERITY_WARN) 268 return true; 269 270 bd9576_fill_uvd_flags(r, 0); 271 } 272 273 return false; 274 } 275 check_ovd_flag_mismatch(struct regulator_dev * rdev,int severity,struct bd957x_regulator_data * r)276 static bool check_ovd_flag_mismatch(struct regulator_dev *rdev, int severity, 277 struct bd957x_regulator_data *r) 278 { 279 if ((severity == REGULATOR_SEVERITY_ERR && 280 r->ovd_notif != REGULATOR_EVENT_REGULATION_OUT) || 281 (severity == REGULATOR_SEVERITY_WARN && 282 r->ovd_notif != REGULATOR_EVENT_OVER_VOLTAGE_WARN)) { 283 dev_warn(rdev_get_dev(rdev), 284 "Can't support both OVD WARN and ERR\n"); 285 if (severity == REGULATOR_SEVERITY_WARN) 286 return true; 287 288 bd9576_fill_ovd_flags(r, 0); 289 } 290 291 return false; 292 } 293 check_temp_flag_mismatch(struct regulator_dev * rdev,int severity,struct bd957x_regulator_data * r)294 static bool check_temp_flag_mismatch(struct regulator_dev *rdev, int severity, 295 struct bd957x_regulator_data *r) 296 { 297 if ((severity == REGULATOR_SEVERITY_ERR && 298 r->temp_notif != REGULATOR_EVENT_OVER_TEMP) || 299 (severity == REGULATOR_SEVERITY_WARN && 300 r->temp_notif != REGULATOR_EVENT_OVER_TEMP_WARN)) { 301 dev_warn(rdev_get_dev(rdev), 302 "Can't support both thermal WARN and ERR\n"); 303 if (severity == REGULATOR_SEVERITY_WARN) 304 return true; 305 } 306 307 return false; 308 } 309 bd9576_set_ocp(struct regulator_dev * rdev,int lim_uA,int severity,bool enable)310 static int bd9576_set_ocp(struct regulator_dev *rdev, int lim_uA, int severity, 311 bool enable) 312 { 313 struct bd957x_data *d; 314 struct bd957x_regulator_data *r; 315 int reg, mask; 316 int Vfet, rfet; 317 const struct linear_range *range; 318 int num_ranges; 319 320 if ((lim_uA && !enable) || (!lim_uA && enable)) 321 return -EINVAL; 322 323 r = container_of(rdev->desc, struct bd957x_regulator_data, desc); 324 if (!r->oc_supported) 325 return -EINVAL; 326 327 d = rdev_get_drvdata(rdev); 328 329 if (severity == REGULATOR_SEVERITY_PROT) { 330 reg = r->ocp_reg; 331 mask = r->ocp_mask; 332 if (r->ocw_rfet) { 333 range = voutS1_ocp_ranges; 334 num_ranges = ARRAY_SIZE(voutS1_ocp_ranges); 335 rfet = r->ocw_rfet / 1000; 336 } else { 337 range = voutS1_ocp_ranges_internal; 338 num_ranges = ARRAY_SIZE(voutS1_ocp_ranges_internal); 339 /* Internal values are already micro-amperes */ 340 rfet = 1000; 341 } 342 } else { 343 reg = r->ocw_reg; 344 mask = r->ocw_mask; 345 346 if (r->ocw_rfet) { 347 range = voutS1_ocw_ranges; 348 num_ranges = ARRAY_SIZE(voutS1_ocw_ranges); 349 rfet = r->ocw_rfet / 1000; 350 } else { 351 range = voutS1_ocw_ranges_internal; 352 num_ranges = ARRAY_SIZE(voutS1_ocw_ranges_internal); 353 /* Internal values are already micro-amperes */ 354 rfet = 1000; 355 } 356 357 /* We abuse uvd fields for OCW on VoutS1 */ 358 if (r->uvd_notif) { 359 /* 360 * If both warning and error are requested, prioritize 361 * ERROR configuration 362 */ 363 if (check_ocp_flag_mismatch(rdev, severity, r)) 364 return 0; 365 } else { 366 bool warn = severity == REGULATOR_SEVERITY_WARN; 367 368 bd9576_fill_ocp_flags(r, warn); 369 } 370 } 371 372 /* 373 * limits are given in uA, rfet is mOhm 374 * Divide lim_uA by 1000 to get Vfet in uV. 375 * (We expect both Rfet and limit uA to be magnitude of hundreds of 376 * milli Amperes & milli Ohms => we should still have decent accuracy) 377 */ 378 Vfet = lim_uA/1000 * rfet; 379 380 return bd9576_set_limit(range, num_ranges, d->regmap, 381 reg, mask, Vfet); 382 } 383 bd9576_set_uvp(struct regulator_dev * rdev,int lim_uV,int severity,bool enable)384 static int bd9576_set_uvp(struct regulator_dev *rdev, int lim_uV, int severity, 385 bool enable) 386 { 387 struct bd957x_data *d; 388 struct bd957x_regulator_data *r; 389 int mask, reg; 390 391 if (severity == REGULATOR_SEVERITY_PROT) { 392 if (!enable || lim_uV) 393 return -EINVAL; 394 return 0; 395 } 396 397 /* 398 * BD9576 has enable control as a special value in limit reg. Can't 399 * set limit but keep feature disabled or enable W/O given limit. 400 */ 401 if ((lim_uV && !enable) || (!lim_uV && enable)) 402 return -EINVAL; 403 404 r = container_of(rdev->desc, struct bd957x_regulator_data, desc); 405 d = rdev_get_drvdata(rdev); 406 407 mask = r->xvd_mask; 408 reg = r->uvd_reg; 409 /* 410 * Check that there is no mismatch for what the detection IRQs are to 411 * be used. 412 */ 413 if (r->uvd_notif) { 414 if (check_uvd_flag_mismatch(rdev, severity, r)) 415 return 0; 416 } else { 417 bd9576_fill_uvd_flags(r, severity == REGULATOR_SEVERITY_WARN); 418 } 419 420 return bd9576_set_limit(r->xvd_ranges, r->num_xvd_ranges, d->regmap, 421 reg, mask, lim_uV); 422 } 423 bd9576_set_ovp(struct regulator_dev * rdev,int lim_uV,int severity,bool enable)424 static int bd9576_set_ovp(struct regulator_dev *rdev, int lim_uV, int severity, 425 bool enable) 426 { 427 struct bd957x_data *d; 428 struct bd957x_regulator_data *r; 429 int mask, reg; 430 431 if (severity == REGULATOR_SEVERITY_PROT) { 432 if (!enable || lim_uV) 433 return -EINVAL; 434 return 0; 435 } 436 437 /* 438 * BD9576 has enable control as a special value in limit reg. Can't 439 * set limit but keep feature disabled or enable W/O given limit. 440 */ 441 if ((lim_uV && !enable) || (!lim_uV && enable)) 442 return -EINVAL; 443 444 r = container_of(rdev->desc, struct bd957x_regulator_data, desc); 445 d = rdev_get_drvdata(rdev); 446 447 mask = r->xvd_mask; 448 reg = r->ovd_reg; 449 /* 450 * Check that there is no mismatch for what the detection IRQs are to 451 * be used. 452 */ 453 if (r->ovd_notif) { 454 if (check_ovd_flag_mismatch(rdev, severity, r)) 455 return 0; 456 } else { 457 bd9576_fill_ovd_flags(r, severity == REGULATOR_SEVERITY_WARN); 458 } 459 460 return bd9576_set_limit(r->xvd_ranges, r->num_xvd_ranges, d->regmap, 461 reg, mask, lim_uV); 462 } 463 464 bd9576_set_tw(struct regulator_dev * rdev,int lim,int severity,bool enable)465 static int bd9576_set_tw(struct regulator_dev *rdev, int lim, int severity, 466 bool enable) 467 { 468 struct bd957x_data *d; 469 struct bd957x_regulator_data *r; 470 int i; 471 472 /* 473 * BD9576MUF has fixed temperature limits 474 * The detection can only be enabled/disabled 475 */ 476 if (lim) 477 return -EINVAL; 478 479 /* Protection can't be disabled */ 480 if (severity == REGULATOR_SEVERITY_PROT) { 481 if (!enable) 482 return -EINVAL; 483 else 484 return 0; 485 } 486 487 r = container_of(rdev->desc, struct bd957x_regulator_data, desc); 488 d = rdev_get_drvdata(rdev); 489 490 /* 491 * Check that there is no mismatch for what the detection IRQs are to 492 * be used. 493 */ 494 if (r->temp_notif) 495 if (check_temp_flag_mismatch(rdev, severity, r)) 496 return 0; 497 498 bd9576_fill_temp_flags(r, enable, severity == REGULATOR_SEVERITY_WARN); 499 500 if (enable) 501 return regmap_update_bits(d->regmap, BD957X_REG_INT_THERM_MASK, 502 BD9576_THERM_IRQ_MASK_TW, 0); 503 504 /* 505 * If any of the regulators is interested in thermal warning we keep IRQ 506 * enabled. 507 */ 508 for (i = 0; i < BD9576_NUM_REGULATORS; i++) 509 if (d->regulator_data[i].temp_notif) 510 return 0; 511 512 return regmap_update_bits(d->regmap, BD957X_REG_INT_THERM_MASK, 513 BD9576_THERM_IRQ_MASK_TW, 514 BD9576_THERM_IRQ_MASK_TW); 515 } 516 517 static const struct regulator_ops bd9573_vout34_ops = { 518 .is_enabled = regulator_is_enabled_regmap, 519 .list_voltage = bd957x_vout34_list_voltage, 520 .get_voltage_sel = regulator_get_voltage_sel_regmap, 521 }; 522 523 static const struct regulator_ops bd9576_vout34_ops = { 524 .is_enabled = regulator_is_enabled_regmap, 525 .list_voltage = bd957x_vout34_list_voltage, 526 .get_voltage_sel = regulator_get_voltage_sel_regmap, 527 .set_over_voltage_protection = bd9576_set_ovp, 528 .set_under_voltage_protection = bd9576_set_uvp, 529 .set_thermal_protection = bd9576_set_tw, 530 }; 531 532 static const struct regulator_ops bd9573_vouts1_regulator_ops = { 533 .is_enabled = regulator_is_enabled_regmap, 534 }; 535 536 static const struct regulator_ops bd9576_vouts1_regulator_ops = { 537 .is_enabled = regulator_is_enabled_regmap, 538 .set_over_current_protection = bd9576_set_ocp, 539 }; 540 541 static const struct regulator_ops bd9573_ops = { 542 .is_enabled = regulator_is_enabled_regmap, 543 .list_voltage = bd957x_list_voltage, 544 .get_voltage_sel = regulator_get_voltage_sel_regmap, 545 }; 546 547 static const struct regulator_ops bd9576_ops = { 548 .is_enabled = regulator_is_enabled_regmap, 549 .list_voltage = bd957x_list_voltage, 550 .get_voltage_sel = regulator_get_voltage_sel_regmap, 551 .set_over_voltage_protection = bd9576_set_ovp, 552 .set_under_voltage_protection = bd9576_set_uvp, 553 .set_thermal_protection = bd9576_set_tw, 554 }; 555 556 static const struct regulator_ops *bd9573_ops_arr[] = { 557 [BD957X_VD50] = &bd9573_ops, 558 [BD957X_VD18] = &bd9573_ops, 559 [BD957X_VDDDR] = &bd9573_vout34_ops, 560 [BD957X_VD10] = &bd9573_vout34_ops, 561 [BD957X_VOUTL1] = &bd9573_ops, 562 [BD957X_VOUTS1] = &bd9573_vouts1_regulator_ops, 563 }; 564 565 static const struct regulator_ops *bd9576_ops_arr[] = { 566 [BD957X_VD50] = &bd9576_ops, 567 [BD957X_VD18] = &bd9576_ops, 568 [BD957X_VDDDR] = &bd9576_vout34_ops, 569 [BD957X_VD10] = &bd9576_vout34_ops, 570 [BD957X_VOUTL1] = &bd9576_ops, 571 [BD957X_VOUTS1] = &bd9576_vouts1_regulator_ops, 572 }; 573 vouts1_get_fet_res(struct device_node * np,const struct regulator_desc * desc,struct regulator_config * cfg)574 static int vouts1_get_fet_res(struct device_node *np, 575 const struct regulator_desc *desc, 576 struct regulator_config *cfg) 577 { 578 struct bd957x_regulator_data *data; 579 int ret; 580 u32 uohms; 581 582 data = container_of(desc, struct bd957x_regulator_data, desc); 583 584 ret = of_property_read_u32(np, "rohm,ocw-fet-ron-micro-ohms", &uohms); 585 if (ret) { 586 if (ret != -EINVAL) 587 return ret; 588 589 return 0; 590 } 591 data->ocw_rfet = uohms; 592 return 0; 593 } 594 595 static struct bd957x_data bd957x_regulators = { 596 .regulator_data = { 597 { 598 .desc = { 599 .name = "VD50", 600 .of_match = of_match_ptr("regulator-vd50"), 601 .regulators_node = of_match_ptr("regulators"), 602 .id = BD957X_VD50, 603 .type = REGULATOR_VOLTAGE, 604 .volt_table = &vout1_volt_table[0], 605 .n_voltages = ARRAY_SIZE(vout1_volt_table), 606 .vsel_reg = BD957X_REG_VOUT1_TUNE, 607 .vsel_mask = BD957X_MASK_VOUT1_TUNE, 608 .enable_reg = BD957X_REG_POW_TRIGGER1, 609 .enable_mask = BD957X_REGULATOR_EN_MASK, 610 .enable_val = BD957X_REGULATOR_DIS_VAL, 611 .enable_is_inverted = true, 612 .owner = THIS_MODULE, 613 }, 614 .xvd_ranges = vout1_xvd_ranges, 615 .num_xvd_ranges = ARRAY_SIZE(vout1_xvd_ranges), 616 .ovd_reg = BD9576_REG_VOUT1_OVD, 617 .uvd_reg = BD9576_REG_VOUT1_UVD, 618 .xvd_mask = BD9576_MASK_XVD, 619 }, 620 { 621 .desc = { 622 .name = "VD18", 623 .of_match = of_match_ptr("regulator-vd18"), 624 .regulators_node = of_match_ptr("regulators"), 625 .id = BD957X_VD18, 626 .type = REGULATOR_VOLTAGE, 627 .volt_table = &vout2_volt_table[0], 628 .n_voltages = ARRAY_SIZE(vout2_volt_table), 629 .vsel_reg = BD957X_REG_VOUT2_TUNE, 630 .vsel_mask = BD957X_MASK_VOUT2_TUNE, 631 .enable_reg = BD957X_REG_POW_TRIGGER2, 632 .enable_mask = BD957X_REGULATOR_EN_MASK, 633 .enable_val = BD957X_REGULATOR_DIS_VAL, 634 .enable_is_inverted = true, 635 .owner = THIS_MODULE, 636 }, 637 .xvd_ranges = vout234_xvd_ranges, 638 .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges), 639 .ovd_reg = BD9576_REG_VOUT2_OVD, 640 .uvd_reg = BD9576_REG_VOUT2_UVD, 641 .xvd_mask = BD9576_MASK_XVD, 642 }, 643 { 644 .desc = { 645 .name = "VDDDR", 646 .of_match = of_match_ptr("regulator-vdddr"), 647 .regulators_node = of_match_ptr("regulators"), 648 .id = BD957X_VDDDR, 649 .type = REGULATOR_VOLTAGE, 650 .n_voltages = BD957X_VOUTS34_NUM_VOLT, 651 .vsel_reg = BD957X_REG_VOUT3_TUNE, 652 .vsel_mask = BD957X_MASK_VOUT3_TUNE, 653 .enable_reg = BD957X_REG_POW_TRIGGER3, 654 .enable_mask = BD957X_REGULATOR_EN_MASK, 655 .enable_val = BD957X_REGULATOR_DIS_VAL, 656 .enable_is_inverted = true, 657 .owner = THIS_MODULE, 658 }, 659 .ovd_reg = BD9576_REG_VOUT3_OVD, 660 .uvd_reg = BD9576_REG_VOUT3_UVD, 661 .xvd_mask = BD9576_MASK_XVD, 662 .xvd_ranges = vout234_xvd_ranges, 663 .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges), 664 }, 665 { 666 .desc = { 667 .name = "VD10", 668 .of_match = of_match_ptr("regulator-vd10"), 669 .regulators_node = of_match_ptr("regulators"), 670 .id = BD957X_VD10, 671 .type = REGULATOR_VOLTAGE, 672 .fixed_uV = BD957X_VOUTS4_BASE_VOLT, 673 .n_voltages = BD957X_VOUTS34_NUM_VOLT, 674 .vsel_reg = BD957X_REG_VOUT4_TUNE, 675 .vsel_mask = BD957X_MASK_VOUT4_TUNE, 676 .enable_reg = BD957X_REG_POW_TRIGGER4, 677 .enable_mask = BD957X_REGULATOR_EN_MASK, 678 .enable_val = BD957X_REGULATOR_DIS_VAL, 679 .enable_is_inverted = true, 680 .owner = THIS_MODULE, 681 }, 682 .xvd_ranges = vout234_xvd_ranges, 683 .num_xvd_ranges = ARRAY_SIZE(vout234_xvd_ranges), 684 .ovd_reg = BD9576_REG_VOUT4_OVD, 685 .uvd_reg = BD9576_REG_VOUT4_UVD, 686 .xvd_mask = BD9576_MASK_XVD, 687 }, 688 { 689 .desc = { 690 .name = "VOUTL1", 691 .of_match = of_match_ptr("regulator-voutl1"), 692 .regulators_node = of_match_ptr("regulators"), 693 .id = BD957X_VOUTL1, 694 .type = REGULATOR_VOLTAGE, 695 .volt_table = &voutl1_volt_table[0], 696 .n_voltages = ARRAY_SIZE(voutl1_volt_table), 697 .vsel_reg = BD957X_REG_VOUTL1_TUNE, 698 .vsel_mask = BD957X_MASK_VOUTL1_TUNE, 699 .enable_reg = BD957X_REG_POW_TRIGGERL1, 700 .enable_mask = BD957X_REGULATOR_EN_MASK, 701 .enable_val = BD957X_REGULATOR_DIS_VAL, 702 .enable_is_inverted = true, 703 .owner = THIS_MODULE, 704 }, 705 .xvd_ranges = voutL1_xvd_ranges, 706 .num_xvd_ranges = ARRAY_SIZE(voutL1_xvd_ranges), 707 .ovd_reg = BD9576_REG_VOUTL1_OVD, 708 .uvd_reg = BD9576_REG_VOUTL1_UVD, 709 .xvd_mask = BD9576_MASK_XVD, 710 }, 711 { 712 .desc = { 713 .name = "VOUTS1", 714 .of_match = of_match_ptr("regulator-vouts1"), 715 .regulators_node = of_match_ptr("regulators"), 716 .id = BD957X_VOUTS1, 717 .type = REGULATOR_VOLTAGE, 718 .n_voltages = 1, 719 .fixed_uV = BD957X_VOUTS1_VOLT, 720 .enable_reg = BD957X_REG_POW_TRIGGERS1, 721 .enable_mask = BD957X_REGULATOR_EN_MASK, 722 .enable_val = BD957X_REGULATOR_DIS_VAL, 723 .enable_is_inverted = true, 724 .owner = THIS_MODULE, 725 .of_parse_cb = vouts1_get_fet_res, 726 }, 727 .oc_supported = true, 728 .ocw_reg = BD9576_REG_VOUT1S_OCW, 729 .ocw_mask = BD9576_MASK_VOUT1S_OCW, 730 .ocp_reg = BD9576_REG_VOUT1S_OCP, 731 .ocp_mask = BD9576_MASK_VOUT1S_OCP, 732 }, 733 }, 734 }; 735 bd9576_renable(struct regulator_irq_data * rid,int reg,int mask)736 static int bd9576_renable(struct regulator_irq_data *rid, int reg, int mask) 737 { 738 int val, ret; 739 struct bd957x_data *d = (struct bd957x_data *)rid->data; 740 741 ret = regmap_read(d->regmap, reg, &val); 742 if (ret) 743 return REGULATOR_FAILED_RETRY; 744 745 if (rid->opaque && rid->opaque == (val & mask)) { 746 /* 747 * It seems we stil have same status. Ack and return 748 * information that we are still out of limits and core 749 * should not enable IRQ 750 */ 751 regmap_write(d->regmap, reg, mask & val); 752 return REGULATOR_ERROR_ON; 753 } 754 rid->opaque = 0; 755 /* 756 * Status was changed. Either prolem was solved or we have new issues. 757 * Let's re-enable IRQs and be prepared to report problems again 758 */ 759 return REGULATOR_ERROR_CLEARED; 760 } 761 bd9576_uvd_renable(struct regulator_irq_data * rid)762 static int bd9576_uvd_renable(struct regulator_irq_data *rid) 763 { 764 return bd9576_renable(rid, BD957X_REG_INT_UVD_STAT, UVD_IRQ_VALID_MASK); 765 } 766 bd9576_ovd_renable(struct regulator_irq_data * rid)767 static int bd9576_ovd_renable(struct regulator_irq_data *rid) 768 { 769 return bd9576_renable(rid, BD957X_REG_INT_OVD_STAT, OVD_IRQ_VALID_MASK); 770 } 771 bd9576_temp_renable(struct regulator_irq_data * rid)772 static int bd9576_temp_renable(struct regulator_irq_data *rid) 773 { 774 return bd9576_renable(rid, BD957X_REG_INT_THERM_STAT, 775 BD9576_THERM_IRQ_MASK_TW); 776 } 777 bd9576_uvd_handler(int irq,struct regulator_irq_data * rid,unsigned long * dev_mask)778 static int bd9576_uvd_handler(int irq, struct regulator_irq_data *rid, 779 unsigned long *dev_mask) 780 { 781 int val, ret, i; 782 struct bd957x_data *d = (struct bd957x_data *)rid->data; 783 784 ret = regmap_read(d->regmap, BD957X_REG_INT_UVD_STAT, &val); 785 if (ret) 786 return REGULATOR_FAILED_RETRY; 787 788 *dev_mask = 0; 789 790 rid->opaque = val & UVD_IRQ_VALID_MASK; 791 792 /* 793 * Go through the set status bits and report either error or warning 794 * to the notifier depending on what was flagged in DT 795 */ 796 *dev_mask = val & BD9576_xVD_IRQ_MASK_VOUT1TO4; 797 /* There is 1 bit gap in register after Vout1 .. Vout4 statuses */ 798 *dev_mask |= ((val & BD9576_xVD_IRQ_MASK_VOUTL1) >> 1); 799 /* 800 * We (ab)use the uvd for OCW notification. DT parsing should 801 * have added correct OCW flag to uvd_notif and uvd_err for S1 802 */ 803 *dev_mask |= ((val & BD9576_UVD_IRQ_MASK_VOUTS1_OCW) >> 1); 804 805 for_each_set_bit(i, dev_mask, 6) { 806 struct bd957x_regulator_data *rdata; 807 struct regulator_err_state *stat; 808 809 rdata = &d->regulator_data[i]; 810 stat = &rid->states[i]; 811 812 stat->notifs = rdata->uvd_notif; 813 stat->errors = rdata->uvd_err; 814 } 815 816 ret = regmap_write(d->regmap, BD957X_REG_INT_UVD_STAT, 817 UVD_IRQ_VALID_MASK & val); 818 819 return 0; 820 } 821 bd9576_ovd_handler(int irq,struct regulator_irq_data * rid,unsigned long * dev_mask)822 static int bd9576_ovd_handler(int irq, struct regulator_irq_data *rid, 823 unsigned long *dev_mask) 824 { 825 int val, ret, i; 826 struct bd957x_data *d = (struct bd957x_data *)rid->data; 827 828 ret = regmap_read(d->regmap, BD957X_REG_INT_OVD_STAT, &val); 829 if (ret) 830 return REGULATOR_FAILED_RETRY; 831 832 rid->opaque = val & OVD_IRQ_VALID_MASK; 833 *dev_mask = 0; 834 835 if (!(val & OVD_IRQ_VALID_MASK)) 836 return 0; 837 838 *dev_mask = val & BD9576_xVD_IRQ_MASK_VOUT1TO4; 839 /* There is 1 bit gap in register after Vout1 .. Vout4 statuses */ 840 *dev_mask |= ((val & BD9576_xVD_IRQ_MASK_VOUTL1) >> 1); 841 842 for_each_set_bit(i, dev_mask, 5) { 843 struct bd957x_regulator_data *rdata; 844 struct regulator_err_state *stat; 845 846 rdata = &d->regulator_data[i]; 847 stat = &rid->states[i]; 848 849 stat->notifs = rdata->ovd_notif; 850 stat->errors = rdata->ovd_err; 851 } 852 853 /* Clear the sub-IRQ status */ 854 regmap_write(d->regmap, BD957X_REG_INT_OVD_STAT, 855 OVD_IRQ_VALID_MASK & val); 856 857 return 0; 858 } 859 860 #define BD9576_DEV_MASK_ALL_REGULATORS 0x3F 861 bd9576_thermal_handler(int irq,struct regulator_irq_data * rid,unsigned long * dev_mask)862 static int bd9576_thermal_handler(int irq, struct regulator_irq_data *rid, 863 unsigned long *dev_mask) 864 { 865 int val, ret, i; 866 struct bd957x_data *d = (struct bd957x_data *)rid->data; 867 868 ret = regmap_read(d->regmap, BD957X_REG_INT_THERM_STAT, &val); 869 if (ret) 870 return REGULATOR_FAILED_RETRY; 871 872 if (!(val & BD9576_THERM_IRQ_MASK_TW)) { 873 *dev_mask = 0; 874 return 0; 875 } 876 877 *dev_mask = BD9576_DEV_MASK_ALL_REGULATORS; 878 879 for (i = 0; i < BD9576_NUM_REGULATORS; i++) { 880 struct bd957x_regulator_data *rdata; 881 struct regulator_err_state *stat; 882 883 rdata = &d->regulator_data[i]; 884 stat = &rid->states[i]; 885 886 stat->notifs = rdata->temp_notif; 887 stat->errors = rdata->temp_err; 888 } 889 890 /* Clear the sub-IRQ status */ 891 regmap_write(d->regmap, BD957X_REG_INT_THERM_STAT, 892 BD9576_THERM_IRQ_MASK_TW); 893 894 return 0; 895 } 896 bd957x_probe(struct platform_device * pdev)897 static int bd957x_probe(struct platform_device *pdev) 898 { 899 int i; 900 unsigned int num_reg_data; 901 bool vout_mode, ddr_sel, may_have_irqs = false; 902 struct regmap *regmap; 903 struct bd957x_data *ic_data; 904 struct regulator_config config = { 0 }; 905 /* All regulators are related to UVD and thermal IRQs... */ 906 struct regulator_dev *rdevs[BD9576_NUM_REGULATORS]; 907 /* ...But VoutS1 is not flagged by OVD IRQ */ 908 struct regulator_dev *ovd_devs[BD9576_NUM_OVD_REGULATORS]; 909 static const struct regulator_irq_desc bd9576_notif_uvd = { 910 .name = "bd9576-uvd", 911 .irq_off_ms = 1000, 912 .map_event = bd9576_uvd_handler, 913 .renable = bd9576_uvd_renable, 914 .data = &bd957x_regulators, 915 }; 916 static const struct regulator_irq_desc bd9576_notif_ovd = { 917 .name = "bd9576-ovd", 918 .irq_off_ms = 1000, 919 .map_event = bd9576_ovd_handler, 920 .renable = bd9576_ovd_renable, 921 .data = &bd957x_regulators, 922 }; 923 static const struct regulator_irq_desc bd9576_notif_temp = { 924 .name = "bd9576-temp", 925 .irq_off_ms = 1000, 926 .map_event = bd9576_thermal_handler, 927 .renable = bd9576_temp_renable, 928 .data = &bd957x_regulators, 929 }; 930 enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data; 931 932 num_reg_data = ARRAY_SIZE(bd957x_regulators.regulator_data); 933 934 ic_data = &bd957x_regulators; 935 936 regmap = dev_get_regmap(pdev->dev.parent, NULL); 937 if (!regmap) { 938 dev_err(&pdev->dev, "No regmap\n"); 939 return -EINVAL; 940 } 941 942 ic_data->regmap = regmap; 943 vout_mode = device_property_read_bool(pdev->dev.parent, 944 "rohm,vout1-en-low"); 945 if (vout_mode) { 946 struct gpio_desc *en; 947 948 dev_dbg(&pdev->dev, "GPIO controlled mode\n"); 949 950 /* VOUT1 enable state judged by VOUT1_EN pin */ 951 /* See if we have GPIO defined */ 952 en = devm_fwnode_gpiod_get(&pdev->dev, 953 dev_fwnode(pdev->dev.parent), 954 "rohm,vout1-en", GPIOD_OUT_LOW, 955 "vout1-en"); 956 957 /* VOUT1_OPS gpio ctrl */ 958 /* 959 * Regulator core prioritizes the ena_gpio over 960 * enable/disable/is_enabled callbacks so no need to clear them 961 * even if GPIO is used. So, we can still use same ops. 962 * 963 * In theory it is possible someone wants to set vout1-en LOW 964 * during OTP loading and set VOUT1 to be controlled by GPIO - 965 * but control the GPIO from some where else than this driver. 966 * For that to work we should unset the is_enabled callback 967 * here. 968 * 969 * I believe such case where rohm,vout1-en-low is set and 970 * vout1-en-gpios is not is likely to be a misconfiguration. 971 * So let's just err out for now. 972 */ 973 if (!IS_ERR(en)) 974 config.ena_gpiod = en; 975 else 976 return dev_err_probe(&pdev->dev, PTR_ERR(en), 977 "Failed to get VOUT1 control GPIO\n"); 978 } 979 980 /* 981 * If more than one PMIC needs to be controlled by same processor then 982 * allocate the regulator data array here and use bd9576_regulators as 983 * template. At the moment I see no such use-case so I spare some 984 * bytes and use bd9576_regulators directly for non-constant configs 985 * like DDR voltage selection. 986 */ 987 platform_set_drvdata(pdev, ic_data); 988 ddr_sel = device_property_read_bool(pdev->dev.parent, 989 "rohm,ddr-sel-low"); 990 if (ddr_sel) 991 ic_data->regulator_data[2].desc.fixed_uV = 1350000; 992 else 993 ic_data->regulator_data[2].desc.fixed_uV = 1500000; 994 995 switch (chip) { 996 case ROHM_CHIP_TYPE_BD9576: 997 may_have_irqs = true; 998 dev_dbg(&pdev->dev, "Found BD9576MUF\n"); 999 break; 1000 case ROHM_CHIP_TYPE_BD9573: 1001 dev_dbg(&pdev->dev, "Found BD9573MUF\n"); 1002 break; 1003 default: 1004 dev_err(&pdev->dev, "Unsupported chip type\n"); 1005 return -EINVAL; 1006 } 1007 1008 for (i = 0; i < num_reg_data; i++) { 1009 struct regulator_desc *d; 1010 1011 d = &ic_data->regulator_data[i].desc; 1012 1013 1014 if (may_have_irqs) { 1015 if (d->id >= ARRAY_SIZE(bd9576_ops_arr)) 1016 return -EINVAL; 1017 1018 d->ops = bd9576_ops_arr[d->id]; 1019 } else { 1020 if (d->id >= ARRAY_SIZE(bd9573_ops_arr)) 1021 return -EINVAL; 1022 1023 d->ops = bd9573_ops_arr[d->id]; 1024 } 1025 } 1026 1027 config.dev = pdev->dev.parent; 1028 config.regmap = regmap; 1029 config.driver_data = ic_data; 1030 1031 for (i = 0; i < num_reg_data; i++) { 1032 1033 struct bd957x_regulator_data *r = &ic_data->regulator_data[i]; 1034 const struct regulator_desc *desc = &r->desc; 1035 1036 r->rdev = devm_regulator_register(&pdev->dev, desc, 1037 &config); 1038 if (IS_ERR(r->rdev)) 1039 return dev_err_probe(&pdev->dev, PTR_ERR(r->rdev), 1040 "failed to register %s regulator\n", 1041 desc->name); 1042 /* 1043 * Clear the VOUT1 GPIO setting - rest of the regulators do not 1044 * support GPIO control 1045 */ 1046 config.ena_gpiod = NULL; 1047 1048 if (!may_have_irqs) 1049 continue; 1050 1051 rdevs[i] = r->rdev; 1052 if (i < BD957X_VOUTS1) 1053 ovd_devs[i] = r->rdev; 1054 } 1055 if (may_have_irqs) { 1056 void *ret; 1057 /* 1058 * We can add both the possible error and warning flags here 1059 * because the core uses these only for status clearing and 1060 * if we use warnings - errors are always clear and the other 1061 * way around. We can also add CURRENT flag for all regulators 1062 * because it is never set if it is not supported. Same applies 1063 * to setting UVD for VoutS1 - it is not accidentally cleared 1064 * as it is never set. 1065 */ 1066 int uvd_errs = REGULATOR_ERROR_UNDER_VOLTAGE | 1067 REGULATOR_ERROR_UNDER_VOLTAGE_WARN | 1068 REGULATOR_ERROR_OVER_CURRENT | 1069 REGULATOR_ERROR_OVER_CURRENT_WARN; 1070 int ovd_errs = REGULATOR_ERROR_OVER_VOLTAGE_WARN | 1071 REGULATOR_ERROR_REGULATION_OUT; 1072 int temp_errs = REGULATOR_ERROR_OVER_TEMP | 1073 REGULATOR_ERROR_OVER_TEMP_WARN; 1074 int irq; 1075 1076 irq = platform_get_irq_byname(pdev, "bd9576-uvd"); 1077 1078 /* Register notifiers - can fail if IRQ is not given */ 1079 ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_uvd, 1080 irq, 0, uvd_errs, NULL, 1081 &rdevs[0], 1082 BD9576_NUM_REGULATORS); 1083 if (IS_ERR(ret)) { 1084 if (PTR_ERR(ret) == -EPROBE_DEFER) 1085 return -EPROBE_DEFER; 1086 1087 dev_warn(&pdev->dev, "UVD disabled %pe\n", ret); 1088 } 1089 1090 irq = platform_get_irq_byname(pdev, "bd9576-ovd"); 1091 1092 ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_ovd, 1093 irq, 0, ovd_errs, NULL, 1094 &ovd_devs[0], 1095 BD9576_NUM_OVD_REGULATORS); 1096 if (IS_ERR(ret)) { 1097 if (PTR_ERR(ret) == -EPROBE_DEFER) 1098 return -EPROBE_DEFER; 1099 1100 dev_warn(&pdev->dev, "OVD disabled %pe\n", ret); 1101 } 1102 irq = platform_get_irq_byname(pdev, "bd9576-temp"); 1103 1104 ret = devm_regulator_irq_helper(&pdev->dev, &bd9576_notif_temp, 1105 irq, 0, temp_errs, NULL, 1106 &rdevs[0], 1107 BD9576_NUM_REGULATORS); 1108 if (IS_ERR(ret)) { 1109 if (PTR_ERR(ret) == -EPROBE_DEFER) 1110 return -EPROBE_DEFER; 1111 1112 dev_warn(&pdev->dev, "Thermal warning disabled %pe\n", 1113 ret); 1114 } 1115 } 1116 return 0; 1117 } 1118 1119 static const struct platform_device_id bd957x_pmic_id[] = { 1120 { "bd9573-regulator", ROHM_CHIP_TYPE_BD9573 }, 1121 { "bd9576-regulator", ROHM_CHIP_TYPE_BD9576 }, 1122 { }, 1123 }; 1124 MODULE_DEVICE_TABLE(platform, bd957x_pmic_id); 1125 1126 static struct platform_driver bd957x_regulator = { 1127 .driver = { 1128 .name = "bd957x-pmic", 1129 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 1130 }, 1131 .probe = bd957x_probe, 1132 .id_table = bd957x_pmic_id, 1133 }; 1134 1135 module_platform_driver(bd957x_regulator); 1136 1137 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); 1138 MODULE_DESCRIPTION("ROHM BD9576/BD9573 voltage regulator driver"); 1139 MODULE_LICENSE("GPL"); 1140 MODULE_ALIAS("platform:bd957x-pmic"); 1141