1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2022 Richtek Technology Corp. 4 * 5 * Authors: Alina Yu <alina_yu@richtek.com> 6 * ChiYuan Huang <cy_huang@richtek.com> 7 */ 8 9 #include <linux/bits.h> 10 #include <linux/gpio/consumer.h> 11 #include <linux/i2c.h> 12 #include <linux/interrupt.h> 13 #include <linux/kstrtox.h> 14 #include <linux/linear_range.h> 15 #include <linux/module.h> 16 #include <linux/mutex.h> 17 #include <linux/of.h> 18 #include <linux/power_supply.h> 19 #include <linux/regmap.h> 20 #include <linux/regulator/driver.h> 21 #include <linux/sysfs.h> 22 23 #define RT9471_REG_OTGCFG 0x00 24 #define RT9471_REG_TOP 0x01 25 #define RT9471_REG_FUNC 0x02 26 #define RT9471_REG_IBUS 0x03 27 #define RT9471_REG_VBUS 0x04 28 #define RT9471_REG_PRECHG 0x05 29 #define RT9471_REG_VCHG 0x07 30 #define RT9471_REG_ICHG 0x08 31 #define RT9471_REG_CHGTMR 0x09 32 #define RT9471_REG_EOC 0x0A 33 #define RT9471_REG_INFO 0x0B 34 #define RT9471_REG_JEITA 0x0C 35 #define RT9471_REG_PUMP_EXP 0x0D 36 #define RT9471_REG_DPDMDET 0x0E 37 #define RT9471_REG_ICSTAT 0x0F 38 #define RT9471_REG_STAT0 0x10 39 #define RT9471_REG_STAT1 0x11 40 #define RT9471_REG_STAT2 0x12 41 #define RT9471_REG_IRQ0 0x20 42 #define RT9471_REG_MASK0 0x30 43 44 #define RT9471_OTGCV_MASK GENMASK(7, 6) 45 #define RT9471_OTGCC_MASK BIT(0) 46 #define RT9471_OTGEN_MASK BIT(1) 47 #define RT9471_CHGFAULT_MASK GENMASK(4, 1) 48 49 #define RT9471_NUM_IRQ_REGS 4 50 #define RT9471_OTGCV_MINUV 4850000 51 #define RT9471_OTGCV_STEPUV 150000 52 #define RT9471_NUM_VOTG 4 53 #define RT9471_VCHG_MAXUV 4700000 54 #define RT9471_ICHG_MAXUA 3150000 55 56 /* Device ID */ 57 #define RT9470_DEVID 0x09 58 #define RT9470D_DEVID 0x0A 59 #define RT9471_DEVID 0x0D 60 #define RT9471D_DEVID 0x0E 61 62 /* IRQ number */ 63 #define RT9471_IRQ_BC12_DONE 0 64 #define RT9471_IRQ_DETACH 1 65 #define RT9471_IRQ_RECHG 2 66 #define RT9471_IRQ_CHG_DONE 3 67 #define RT9471_IRQ_BG_CHG 4 68 #define RT9471_IRQ_IE0C 5 69 #define RT9471_IRQ_CHG_RDY 6 70 #define RT9471_IRQ_VBUS_GD 7 71 #define RT9471_IRQ_CHG_BATOV 9 72 #define RT9471_IRQ_CHG_SYSOV 10 73 #define RT9471_IRQ_CHG_TOUT 11 74 #define RT9471_IRQ_CHG_BUSUV 12 75 #define RT9471_IRQ_CHG_THREG 13 76 #define RT9471_IRQ_CHG_AICR 14 77 #define RT9471_IRQ_CHG_MIVR 15 78 #define RT9471_IRQ_SYS_SHORT 16 79 #define RT9471_IRQ_SYS_MIN 17 80 #define RT9471_IRQ_AICC_DONE 18 81 #define RT9471_IRQ_PE_DONE 19 82 #define RT9471_IRQ_JEITA_COLD 20 83 #define RT9471_IRQ_JEITA_COOL 21 84 #define RT9471_IRQ_JEITA_WARM 22 85 #define RT9471_IRQ_JEITA_HOT 23 86 #define RT9471_IRQ_OTG_FAULT 24 87 #define RT9471_IRQ_OTG_LBP 25 88 #define RT9471_IRQ_OTG_CC 26 89 #define RT9471_IRQ_WDT 29 90 #define RT9471_IRQ_VAC_OV 30 91 #define RT9471_IRQ_OTP 31 92 93 enum rt9471_fields { 94 F_WDT = 0, 95 F_WDT_RST, 96 F_CHG_EN, 97 F_HZ, 98 F_BATFET_DIS, 99 F_AICR, 100 F_AICC_EN, 101 F_MIVR, 102 F_IPRE_CHG, 103 F_VPRE_CHG, 104 F_VBAT_REG, 105 F_ICHG_REG, 106 F_EOC_RST, 107 F_TE, 108 F_IEOC_CHG, 109 F_DEVICE_ID, 110 F_REG_RST, 111 F_BC12_EN, 112 F_IC_STAT, 113 F_PORT_STAT, 114 F_ST_CHG_DONE, 115 F_ST_CHG_RDY, 116 F_ST_VBUS_GD, 117 F_MAX_FIELDS 118 }; 119 120 enum rt9471_ranges { 121 RT9471_RANGE_AICR = 0, 122 RT9471_RANGE_MIVR, 123 RT9471_RANGE_IPRE, 124 RT9471_RANGE_VCHG, 125 RT9471_RANGE_ICHG, 126 RT9471_RANGE_IEOC, 127 RT9471_MAX_RANGES 128 }; 129 130 enum { 131 RT9471_PORTSTAT_APPLE_10W = 8, 132 RT9471_PORTSTAT_SAMSUNG_10W, 133 RT9471_PORTSTAT_APPLE_5W, 134 RT9471_PORTSTAT_APPLE_12W, 135 RT9471_PORTSTAT_NSTD, 136 RT9471_PORTSTAT_SDP, 137 RT9471_PORTSTAT_CDP, 138 RT9471_PORTSTAT_DCP, 139 }; 140 141 enum { 142 RT9471_ICSTAT_SLEEP = 0, 143 RT9471_ICSTAT_VBUSRDY, 144 RT9471_ICSTAT_TRICKLECHG, 145 RT9471_ICSTAT_PRECHG, 146 RT9471_ICSTAT_FASTCHG, 147 RT9471_ICSTAT_IEOC, 148 RT9471_ICSTAT_BGCHG, 149 RT9471_ICSTAT_CHGDONE, 150 RT9471_ICSTAT_CHGFAULT, 151 RT9471_ICSTAT_OTG = 15, 152 }; 153 154 struct rt9471_chip { 155 struct device *dev; 156 struct regmap *regmap; 157 struct regmap_field *rm_fields[F_MAX_FIELDS]; 158 struct regmap_irq_chip_data *irq_chip_data; 159 struct regulator_dev *otg_rdev; 160 struct power_supply *psy; 161 struct power_supply_desc psy_desc; 162 struct mutex var_lock; 163 enum power_supply_usb_type psy_usb_type; 164 int psy_usb_curr; 165 }; 166 167 static const struct reg_field rt9471_reg_fields[F_MAX_FIELDS] = { 168 [F_WDT] = REG_FIELD(RT9471_REG_TOP, 0, 1), 169 [F_WDT_RST] = REG_FIELD(RT9471_REG_TOP, 2, 2), 170 [F_CHG_EN] = REG_FIELD(RT9471_REG_FUNC, 0, 0), 171 [F_HZ] = REG_FIELD(RT9471_REG_FUNC, 5, 5), 172 [F_BATFET_DIS] = REG_FIELD(RT9471_REG_FUNC, 7, 7), 173 [F_AICR] = REG_FIELD(RT9471_REG_IBUS, 0, 5), 174 [F_AICC_EN] = REG_FIELD(RT9471_REG_IBUS, 7, 7), 175 [F_MIVR] = REG_FIELD(RT9471_REG_VBUS, 0, 3), 176 [F_IPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 0, 3), 177 [F_VPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 4, 6), 178 [F_VBAT_REG] = REG_FIELD(RT9471_REG_VCHG, 0, 6), 179 [F_ICHG_REG] = REG_FIELD(RT9471_REG_ICHG, 0, 5), 180 [F_EOC_RST] = REG_FIELD(RT9471_REG_EOC, 0, 0), 181 [F_TE] = REG_FIELD(RT9471_REG_EOC, 1, 1), 182 [F_IEOC_CHG] = REG_FIELD(RT9471_REG_EOC, 4, 7), 183 [F_DEVICE_ID] = REG_FIELD(RT9471_REG_INFO, 3, 6), 184 [F_REG_RST] = REG_FIELD(RT9471_REG_INFO, 7, 7), 185 [F_BC12_EN] = REG_FIELD(RT9471_REG_DPDMDET, 7, 7), 186 [F_IC_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 0, 3), 187 [F_PORT_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 4, 7), 188 [F_ST_CHG_DONE] = REG_FIELD(RT9471_REG_STAT0, 3, 3), 189 [F_ST_CHG_RDY] = REG_FIELD(RT9471_REG_STAT0, 6, 6), 190 [F_ST_VBUS_GD] = REG_FIELD(RT9471_REG_STAT0, 7, 7), 191 }; 192 193 static const struct linear_range rt9471_chg_ranges[RT9471_MAX_RANGES] = { 194 [RT9471_RANGE_AICR] = LINEAR_RANGE(50000, 1, 63, 50000), 195 [RT9471_RANGE_MIVR] = LINEAR_RANGE(3900000, 0, 15, 100000), 196 [RT9471_RANGE_IPRE] = LINEAR_RANGE(50000, 0, 15, 50000), 197 [RT9471_RANGE_VCHG] = LINEAR_RANGE(3900000, 0, 80, 10000), 198 [RT9471_RANGE_ICHG] = LINEAR_RANGE(0, 0, 63, 50000), 199 [RT9471_RANGE_IEOC] = LINEAR_RANGE(50000, 0, 15, 50000), 200 }; 201 202 static int rt9471_set_value_by_field_range(struct rt9471_chip *chip, 203 enum rt9471_fields field, 204 enum rt9471_ranges range, int val) 205 { 206 unsigned int sel; 207 208 if (val < 0) 209 return -EINVAL; 210 211 linear_range_get_selector_within(rt9471_chg_ranges + range, val, &sel); 212 213 return regmap_field_write(chip->rm_fields[field], sel); 214 } 215 216 217 static int rt9471_get_value_by_field_range(struct rt9471_chip *chip, 218 enum rt9471_fields field, 219 enum rt9471_ranges range, int *val) 220 { 221 unsigned int sel, rvalue; 222 int ret; 223 224 ret = regmap_field_read(chip->rm_fields[field], &sel); 225 if (ret) 226 return ret; 227 228 ret = linear_range_get_value(rt9471_chg_ranges + range, sel, &rvalue); 229 if (ret) 230 return ret; 231 232 *val = rvalue; 233 return 0; 234 } 235 236 static int rt9471_set_ieoc(struct rt9471_chip *chip, int microamp) 237 { 238 int ret; 239 240 if (microamp == 0) 241 return regmap_field_write(chip->rm_fields[F_TE], 0); 242 243 ret = rt9471_set_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp); 244 if (ret) 245 return ret; 246 247 /* After applying the new IEOC value, enable charge termination */ 248 return regmap_field_write(chip->rm_fields[F_TE], 1); 249 } 250 251 static int rt9471_get_ieoc(struct rt9471_chip *chip, int *microamp) 252 { 253 unsigned int chg_term_enable; 254 int ret; 255 256 ret = regmap_field_read(chip->rm_fields[F_TE], &chg_term_enable); 257 if (ret) 258 return ret; 259 260 if (!chg_term_enable) { 261 *microamp = 0; 262 return 0; 263 } 264 265 return rt9471_get_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp); 266 } 267 268 static int rt9471_get_status(struct rt9471_chip *chip, int *status) 269 { 270 unsigned int ic_stat; 271 int ret; 272 273 ret = regmap_field_read(chip->rm_fields[F_IC_STAT], &ic_stat); 274 if (ret) 275 return ret; 276 277 switch (ic_stat) { 278 case RT9471_ICSTAT_VBUSRDY: 279 case RT9471_ICSTAT_CHGFAULT: 280 *status = POWER_SUPPLY_STATUS_NOT_CHARGING; 281 break; 282 case RT9471_ICSTAT_TRICKLECHG ... RT9471_ICSTAT_BGCHG: 283 *status = POWER_SUPPLY_STATUS_CHARGING; 284 break; 285 case RT9471_ICSTAT_CHGDONE: 286 *status = POWER_SUPPLY_STATUS_FULL; 287 break; 288 case RT9471_ICSTAT_SLEEP: 289 case RT9471_ICSTAT_OTG: 290 *status = POWER_SUPPLY_STATUS_DISCHARGING; 291 break; 292 default: 293 *status = POWER_SUPPLY_STATUS_UNKNOWN; 294 break; 295 } 296 297 return 0; 298 } 299 300 static int rt9471_get_vbus_good(struct rt9471_chip *chip, int *stat) 301 { 302 unsigned int vbus_gd; 303 int ret; 304 305 ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd); 306 if (ret) 307 return ret; 308 309 *stat = vbus_gd; 310 return 0; 311 } 312 313 static int rt9471_get_usb_type(struct rt9471_chip *chip, int *usb_type) 314 { 315 mutex_lock(&chip->var_lock); 316 *usb_type = chip->psy_usb_type; 317 mutex_unlock(&chip->var_lock); 318 319 return 0; 320 } 321 322 static int rt9471_get_usb_type_current(struct rt9471_chip *chip, 323 int *microamp) 324 { 325 mutex_lock(&chip->var_lock); 326 *microamp = chip->psy_usb_curr; 327 mutex_unlock(&chip->var_lock); 328 329 return 0; 330 } 331 332 static enum power_supply_property rt9471_charger_properties[] = { 333 POWER_SUPPLY_PROP_STATUS, 334 POWER_SUPPLY_PROP_ONLINE, 335 POWER_SUPPLY_PROP_CURRENT_MAX, 336 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, 337 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, 338 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, 339 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, 340 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 341 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, 342 POWER_SUPPLY_PROP_USB_TYPE, 343 POWER_SUPPLY_PROP_PRECHARGE_CURRENT, 344 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, 345 POWER_SUPPLY_PROP_MODEL_NAME, 346 POWER_SUPPLY_PROP_MANUFACTURER, 347 }; 348 349 static int rt9471_charger_property_is_writeable(struct power_supply *psy, 350 enum power_supply_property psp) 351 { 352 switch (psp) { 353 case POWER_SUPPLY_PROP_STATUS: 354 case POWER_SUPPLY_PROP_ONLINE: 355 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 356 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 357 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 358 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 359 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 360 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 361 return 1; 362 default: 363 return 0; 364 } 365 } 366 367 static int rt9471_charger_set_property(struct power_supply *psy, 368 enum power_supply_property psp, 369 const union power_supply_propval *val) 370 { 371 struct rt9471_chip *chip = power_supply_get_drvdata(psy); 372 int value = val->intval; 373 374 switch (psp) { 375 case POWER_SUPPLY_PROP_STATUS: 376 return regmap_field_write(chip->rm_fields[F_CHG_EN], !!value); 377 case POWER_SUPPLY_PROP_ONLINE: 378 return regmap_field_write(chip->rm_fields[F_HZ], !value); 379 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 380 return rt9471_set_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, value); 381 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 382 return rt9471_set_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, value); 383 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 384 return rt9471_set_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, value); 385 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 386 return rt9471_set_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, value); 387 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 388 return rt9471_set_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, value); 389 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 390 return rt9471_set_ieoc(chip, val->intval); 391 default: 392 return -EINVAL; 393 } 394 } 395 396 static const char * const rt9471_manufacturer = "Richtek Technology Corp."; 397 static const char * const rt9471_model = "RT9471"; 398 399 static int rt9471_charger_get_property(struct power_supply *psy, 400 enum power_supply_property psp, 401 union power_supply_propval *val) 402 { 403 struct rt9471_chip *chip = power_supply_get_drvdata(psy); 404 int *pvalue = &val->intval; 405 406 switch (psp) { 407 case POWER_SUPPLY_PROP_STATUS: 408 return rt9471_get_status(chip, pvalue); 409 case POWER_SUPPLY_PROP_ONLINE: 410 return rt9471_get_vbus_good(chip, pvalue); 411 case POWER_SUPPLY_PROP_CURRENT_MAX: 412 return rt9471_get_usb_type_current(chip, pvalue); 413 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 414 return rt9471_get_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, pvalue); 415 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: 416 *pvalue = RT9471_ICHG_MAXUA; 417 return 0; 418 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 419 return rt9471_get_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, pvalue); 420 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: 421 val->intval = RT9471_VCHG_MAXUV; 422 return 0; 423 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 424 return rt9471_get_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, pvalue); 425 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 426 return rt9471_get_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, pvalue); 427 case POWER_SUPPLY_PROP_USB_TYPE: 428 return rt9471_get_usb_type(chip, pvalue); 429 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 430 return rt9471_get_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, pvalue); 431 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 432 return rt9471_get_ieoc(chip, pvalue); 433 case POWER_SUPPLY_PROP_MODEL_NAME: 434 val->strval = rt9471_model; 435 return 0; 436 case POWER_SUPPLY_PROP_MANUFACTURER: 437 val->strval = rt9471_manufacturer; 438 return 0; 439 default: 440 return -ENODATA; 441 } 442 } 443 444 static irqreturn_t rt9471_vbus_gd_handler(int irqno, void *devid) 445 { 446 struct rt9471_chip *chip = devid; 447 448 power_supply_changed(chip->psy); 449 450 return IRQ_HANDLED; 451 } 452 453 static irqreturn_t rt9471_detach_handler(int irqno, void *devid) 454 { 455 struct rt9471_chip *chip = devid; 456 unsigned int vbus_gd; 457 int ret; 458 459 ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd); 460 if (ret) 461 return IRQ_NONE; 462 463 /* Only focus on really detached */ 464 if (vbus_gd) 465 return IRQ_HANDLED; 466 467 mutex_lock(&chip->var_lock); 468 chip->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN; 469 chip->psy_usb_curr = 0; 470 mutex_unlock(&chip->var_lock); 471 472 power_supply_changed(chip->psy); 473 474 return IRQ_HANDLED; 475 } 476 477 static irqreturn_t rt9471_bc12_done_handler(int irqno, void *devid) 478 { 479 struct rt9471_chip *chip = devid; 480 enum power_supply_usb_type usb_type; 481 unsigned int port_stat; 482 int usb_curr, ret; 483 484 ret = regmap_field_read(chip->rm_fields[F_PORT_STAT], &port_stat); 485 if (ret) 486 return IRQ_NONE; 487 488 switch (port_stat) { 489 case RT9471_PORTSTAT_APPLE_10W: 490 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID; 491 usb_curr = 2000000; 492 break; 493 case RT9471_PORTSTAT_APPLE_5W: 494 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID; 495 usb_curr = 1000000; 496 break; 497 case RT9471_PORTSTAT_APPLE_12W: 498 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID; 499 usb_curr = 2400000; 500 break; 501 case RT9471_PORTSTAT_SAMSUNG_10W: 502 usb_type = POWER_SUPPLY_USB_TYPE_DCP; 503 usb_curr = 2000000; 504 break; 505 case RT9471_PORTSTAT_DCP: 506 usb_type = POWER_SUPPLY_USB_TYPE_DCP; 507 usb_curr = 1500000; 508 break; 509 case RT9471_PORTSTAT_NSTD: 510 case RT9471_PORTSTAT_SDP: 511 usb_type = POWER_SUPPLY_USB_TYPE_SDP; 512 usb_curr = 500000; 513 break; 514 case RT9471_PORTSTAT_CDP: 515 usb_type = POWER_SUPPLY_USB_TYPE_CDP; 516 usb_curr = 1500000; 517 break; 518 default: 519 usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN; 520 usb_curr = 0; 521 break; 522 } 523 524 mutex_lock(&chip->var_lock); 525 chip->psy_usb_type = usb_type; 526 chip->psy_usb_curr = usb_curr; 527 mutex_unlock(&chip->var_lock); 528 529 power_supply_changed(chip->psy); 530 531 return IRQ_HANDLED; 532 } 533 534 static irqreturn_t rt9471_wdt_handler(int irqno, void *devid) 535 { 536 struct rt9471_chip *chip = devid; 537 int ret; 538 539 ret = regmap_field_write(chip->rm_fields[F_WDT_RST], 1); 540 541 return ret ? IRQ_NONE : IRQ_HANDLED; 542 } 543 544 static irqreturn_t rt9471_otg_fault_handler(int irqno, void *devid) 545 { 546 struct rt9471_chip *chip = devid; 547 548 regulator_notifier_call_chain(chip->otg_rdev, REGULATOR_EVENT_FAIL, NULL); 549 550 return IRQ_HANDLED; 551 } 552 553 #define RT9471_IRQ_DESC(_name, _hwirq) \ 554 { \ 555 .name = #_name, \ 556 .hwirq = _hwirq, \ 557 .handler = rt9471_##_name##_handler, \ 558 } 559 560 static int rt9471_register_interrupts(struct rt9471_chip *chip) 561 { 562 struct device *dev = chip->dev; 563 static const struct { 564 char *name; 565 int hwirq; 566 irq_handler_t handler; 567 } chg_irqs[] = { 568 RT9471_IRQ_DESC(vbus_gd, RT9471_IRQ_VBUS_GD), 569 RT9471_IRQ_DESC(detach, RT9471_IRQ_DETACH), 570 RT9471_IRQ_DESC(bc12_done, RT9471_IRQ_BC12_DONE), 571 RT9471_IRQ_DESC(wdt, RT9471_IRQ_WDT), 572 RT9471_IRQ_DESC(otg_fault, RT9471_IRQ_OTG_FAULT), 573 }, *curr; 574 int i, virq, ret; 575 576 for (i = 0; i < ARRAY_SIZE(chg_irqs); i++) { 577 curr = chg_irqs + i; 578 579 virq = regmap_irq_get_virq(chip->irq_chip_data, curr->hwirq); 580 if (virq <= 0) 581 return virq; 582 583 ret = devm_request_threaded_irq(dev, virq, NULL, curr->handler, 584 IRQF_ONESHOT, curr->name, chip); 585 if (ret) 586 return dev_err_probe(dev, ret, "Failed to register IRQ (%s)\n", 587 curr->name); 588 } 589 590 return 0; 591 } 592 593 static const struct regulator_ops rt9471_otg_ops = { 594 .enable = regulator_enable_regmap, 595 .disable = regulator_disable_regmap, 596 .is_enabled = regulator_is_enabled_regmap, 597 .list_voltage = regulator_list_voltage_linear, 598 .get_voltage_sel = regulator_get_voltage_sel_regmap, 599 .set_voltage_sel = regulator_set_voltage_sel_regmap, 600 .set_current_limit = regulator_set_current_limit_regmap, 601 .get_current_limit = regulator_get_current_limit_regmap, 602 }; 603 604 static const unsigned int rt9471_otg_microamp[] = { 500000, 1200000, }; 605 606 static const struct regulator_desc rt9471_otg_rdesc = { 607 .of_match = of_match_ptr("usb-otg-vbus-regulator"), 608 .name = "rt9471-otg-vbus", 609 .owner = THIS_MODULE, 610 .type = REGULATOR_VOLTAGE, 611 .ops = &rt9471_otg_ops, 612 .min_uV = RT9471_OTGCV_MINUV, 613 .uV_step = RT9471_OTGCV_STEPUV, 614 .n_voltages = RT9471_NUM_VOTG, 615 .curr_table = rt9471_otg_microamp, 616 .n_current_limits = ARRAY_SIZE(rt9471_otg_microamp), 617 .enable_mask = RT9471_OTGEN_MASK, 618 .enable_reg = RT9471_REG_FUNC, 619 .vsel_reg = RT9471_REG_OTGCFG, 620 .vsel_mask = RT9471_OTGCV_MASK, 621 .csel_reg = RT9471_REG_OTGCFG, 622 .csel_mask = RT9471_OTGCC_MASK, 623 }; 624 625 static int rt9471_register_otg_regulator(struct rt9471_chip *chip) 626 { 627 struct device *dev = chip->dev; 628 struct regulator_config cfg = { .dev = dev, .driver_data = chip }; 629 630 chip->otg_rdev = devm_regulator_register(dev, &rt9471_otg_rdesc, &cfg); 631 632 return PTR_ERR_OR_ZERO(chip->otg_rdev); 633 } 634 635 static inline struct rt9471_chip *psy_device_to_chip(struct device *dev) 636 { 637 return power_supply_get_drvdata(to_power_supply(dev)); 638 } 639 640 static ssize_t sysoff_enable_show(struct device *dev, 641 struct device_attribute *attr, char *buf) 642 { 643 struct rt9471_chip *chip = psy_device_to_chip(dev); 644 unsigned int sysoff_enable; 645 int ret; 646 647 ret = regmap_field_read(chip->rm_fields[F_BATFET_DIS], &sysoff_enable); 648 if (ret) 649 return ret; 650 651 return sysfs_emit(buf, "%d\n", sysoff_enable); 652 } 653 654 static ssize_t sysoff_enable_store(struct device *dev, 655 struct device_attribute *attr, 656 const char *buf, size_t count) 657 { 658 struct rt9471_chip *chip = psy_device_to_chip(dev); 659 unsigned int tmp; 660 int ret; 661 662 ret = kstrtouint(buf, 10, &tmp); 663 if (ret) 664 return ret; 665 666 ret = regmap_field_write(chip->rm_fields[F_BATFET_DIS], !!tmp); 667 if (ret) 668 return ret; 669 670 return count; 671 } 672 673 static ssize_t port_detect_enable_show(struct device *dev, 674 struct device_attribute *attr, char *buf) 675 { 676 struct rt9471_chip *chip = psy_device_to_chip(dev); 677 unsigned int bc12_enable; 678 int ret; 679 680 ret = regmap_field_read(chip->rm_fields[F_BC12_EN], &bc12_enable); 681 if (ret) 682 return ret; 683 684 return sysfs_emit(buf, "%d\n", bc12_enable); 685 } 686 687 static ssize_t port_detect_enable_store(struct device *dev, 688 struct device_attribute *attr, 689 const char *buf, size_t count) 690 { 691 struct rt9471_chip *chip = psy_device_to_chip(dev); 692 unsigned int tmp; 693 int ret; 694 695 ret = kstrtouint(buf, 10, &tmp); 696 if (ret) 697 return ret; 698 699 ret = regmap_field_write(chip->rm_fields[F_BC12_EN], !!tmp); 700 if (ret) 701 return ret; 702 703 return count; 704 } 705 706 static DEVICE_ATTR_RW(sysoff_enable); 707 static DEVICE_ATTR_RW(port_detect_enable); 708 709 static struct attribute *rt9471_sysfs_attrs[] = { 710 &dev_attr_sysoff_enable.attr, 711 &dev_attr_port_detect_enable.attr, 712 NULL 713 }; 714 715 ATTRIBUTE_GROUPS(rt9471_sysfs); 716 717 static int rt9471_register_psy(struct rt9471_chip *chip) 718 { 719 struct device *dev = chip->dev; 720 struct power_supply_desc *desc = &chip->psy_desc; 721 struct power_supply_config cfg = {}; 722 char *psy_name; 723 724 cfg.drv_data = chip; 725 cfg.fwnode = dev_fwnode(dev); 726 cfg.attr_grp = rt9471_sysfs_groups; 727 728 psy_name = devm_kasprintf(dev, GFP_KERNEL, "rt9471-%s", dev_name(dev)); 729 if (!psy_name) 730 return -ENOMEM; 731 732 desc->name = psy_name; 733 desc->type = POWER_SUPPLY_TYPE_USB; 734 desc->usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) | 735 BIT(POWER_SUPPLY_USB_TYPE_CDP) | 736 BIT(POWER_SUPPLY_USB_TYPE_DCP) | 737 BIT(POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID) | 738 BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN); 739 desc->properties = rt9471_charger_properties; 740 desc->num_properties = ARRAY_SIZE(rt9471_charger_properties); 741 desc->get_property = rt9471_charger_get_property; 742 desc->set_property = rt9471_charger_set_property; 743 desc->property_is_writeable = rt9471_charger_property_is_writeable; 744 745 chip->psy = devm_power_supply_register(dev, desc, &cfg); 746 747 return PTR_ERR_OR_ZERO(chip->psy); 748 } 749 750 static const struct regmap_irq rt9471_regmap_irqs[] = { 751 REGMAP_IRQ_REG_LINE(RT9471_IRQ_BC12_DONE, 8), 752 REGMAP_IRQ_REG_LINE(RT9471_IRQ_DETACH, 8), 753 REGMAP_IRQ_REG_LINE(RT9471_IRQ_RECHG, 8), 754 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_DONE, 8), 755 REGMAP_IRQ_REG_LINE(RT9471_IRQ_BG_CHG, 8), 756 REGMAP_IRQ_REG_LINE(RT9471_IRQ_IE0C, 8), 757 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_RDY, 8), 758 REGMAP_IRQ_REG_LINE(RT9471_IRQ_VBUS_GD, 8), 759 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BATOV, 8), 760 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_SYSOV, 8), 761 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_TOUT, 8), 762 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BUSUV, 8), 763 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_THREG, 8), 764 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_AICR, 8), 765 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_MIVR, 8), 766 REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_SHORT, 8), 767 REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_MIN, 8), 768 REGMAP_IRQ_REG_LINE(RT9471_IRQ_AICC_DONE, 8), 769 REGMAP_IRQ_REG_LINE(RT9471_IRQ_PE_DONE, 8), 770 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COLD, 8), 771 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COOL, 8), 772 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_WARM, 8), 773 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_HOT, 8), 774 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_FAULT, 8), 775 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_LBP, 8), 776 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_CC, 8), 777 REGMAP_IRQ_REG_LINE(RT9471_IRQ_WDT, 8), 778 REGMAP_IRQ_REG_LINE(RT9471_IRQ_VAC_OV, 8), 779 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTP, 8), 780 }; 781 782 static const struct regmap_irq_chip rt9471_irq_chip = { 783 .name = "rt9471-irqs", 784 .status_base = RT9471_REG_IRQ0, 785 .mask_base = RT9471_REG_MASK0, 786 .num_regs = RT9471_NUM_IRQ_REGS, 787 .irqs = rt9471_regmap_irqs, 788 .num_irqs = ARRAY_SIZE(rt9471_regmap_irqs), 789 }; 790 791 static const struct reg_sequence rt9471_init_regs[] = { 792 REG_SEQ0(RT9471_REG_INFO, 0x80), /* REG_RST */ 793 REG_SEQ0(RT9471_REG_TOP, 0xC0), /* WDT = 0 */ 794 REG_SEQ0(RT9471_REG_FUNC, 0x01), /* BATFET_DIS_DLY = 0 */ 795 REG_SEQ0(RT9471_REG_IBUS, 0x0A), /* AUTO_AICR = 0 */ 796 REG_SEQ0(RT9471_REG_VBUS, 0xC6), /* VAC_OVP = 14V */ 797 REG_SEQ0(RT9471_REG_JEITA, 0x38), /* JEITA = 0 */ 798 REG_SEQ0(RT9471_REG_DPDMDET, 0x31), /* BC12_EN = 0, DCP_DP_OPT = 1 */ 799 }; 800 801 static int rt9471_check_devinfo(struct rt9471_chip *chip) 802 { 803 struct device *dev = chip->dev; 804 unsigned int dev_id; 805 int ret; 806 807 ret = regmap_field_read(chip->rm_fields[F_DEVICE_ID], &dev_id); 808 if (ret) 809 return dev_err_probe(dev, ret, "Failed to read device_id\n"); 810 811 switch (dev_id) { 812 case RT9470_DEVID: 813 case RT9470D_DEVID: 814 case RT9471_DEVID: 815 case RT9471D_DEVID: 816 return 0; 817 default: 818 return dev_err_probe(dev, -ENODEV, "Incorrect device id\n"); 819 } 820 } 821 822 static bool rt9471_accessible_reg(struct device *dev, unsigned int reg) 823 { 824 switch (reg) { 825 case 0x00 ... 0x0F: 826 case 0x10 ... 0x13: 827 case 0x20 ... 0x33: 828 case 0x40 ... 0xA1: 829 return true; 830 default: 831 return false; 832 } 833 } 834 835 static const struct regmap_config rt9471_regmap_config = { 836 .reg_bits = 8, 837 .val_bits = 8, 838 .max_register = 0xA1, 839 .writeable_reg = rt9471_accessible_reg, 840 .readable_reg = rt9471_accessible_reg, 841 }; 842 843 static int rt9471_probe(struct i2c_client *i2c) 844 { 845 struct device *dev = &i2c->dev; 846 struct rt9471_chip *chip; 847 struct gpio_desc *ce_gpio; 848 struct regmap *regmap; 849 int ret; 850 851 chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL); 852 if (!chip) 853 return -ENOMEM; 854 855 chip->dev = dev; 856 mutex_init(&chip->var_lock); 857 i2c_set_clientdata(i2c, chip); 858 859 /* Default pull charge enable gpio to make 'CHG_EN' by SW control only */ 860 ce_gpio = devm_gpiod_get_optional(dev, "charge-enable", GPIOD_OUT_HIGH); 861 if (IS_ERR(ce_gpio)) 862 return dev_err_probe(dev, PTR_ERR(ce_gpio), 863 "Failed to config charge enable gpio\n"); 864 865 regmap = devm_regmap_init_i2c(i2c, &rt9471_regmap_config); 866 if (IS_ERR(regmap)) 867 return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n"); 868 869 chip->regmap = regmap; 870 871 ret = devm_regmap_field_bulk_alloc(dev, regmap, chip->rm_fields, 872 rt9471_reg_fields, 873 ARRAY_SIZE(rt9471_reg_fields)); 874 if (ret) 875 return dev_err_probe(dev, ret, "Failed to alloc regmap field\n"); 876 877 ret = rt9471_check_devinfo(chip); 878 if (ret) 879 return ret; 880 881 ret = regmap_register_patch(regmap, rt9471_init_regs, 882 ARRAY_SIZE(rt9471_init_regs)); 883 if (ret) 884 return dev_err_probe(dev, ret, "Failed to init registers\n"); 885 886 ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq, 887 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0, 888 &rt9471_irq_chip, &chip->irq_chip_data); 889 if (ret) 890 return dev_err_probe(dev, ret, "Failed to add IRQ chip\n"); 891 892 ret = rt9471_register_psy(chip); 893 if (ret) 894 return dev_err_probe(dev, ret, "Failed to register psy\n"); 895 896 ret = rt9471_register_otg_regulator(chip); 897 if (ret) 898 return dev_err_probe(dev, ret, "Failed to register otg\n"); 899 900 ret = rt9471_register_interrupts(chip); 901 if (ret) 902 return ret; 903 904 /* After IRQs are all initialized, enable port detection by default */ 905 return regmap_field_write(chip->rm_fields[F_BC12_EN], 1); 906 } 907 908 static void rt9471_shutdown(struct i2c_client *i2c) 909 { 910 struct rt9471_chip *chip = i2c_get_clientdata(i2c); 911 912 /* 913 * There's no external reset pin. Do register reset to guarantee charger 914 * function is normal after shutdown 915 */ 916 regmap_field_write(chip->rm_fields[F_REG_RST], 1); 917 } 918 919 static const struct of_device_id rt9471_of_device_id[] = { 920 { .compatible = "richtek,rt9471" }, 921 {} 922 }; 923 MODULE_DEVICE_TABLE(of, rt9471_of_device_id); 924 925 static struct i2c_driver rt9471_driver = { 926 .driver = { 927 .name = "rt9471", 928 .of_match_table = rt9471_of_device_id, 929 }, 930 .probe = rt9471_probe, 931 .shutdown = rt9471_shutdown, 932 }; 933 module_i2c_driver(rt9471_driver); 934 935 MODULE_DESCRIPTION("Richtek RT9471 charger driver"); 936 MODULE_AUTHOR("Alina Yu <alina_yu@richtek.com>"); 937 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); 938 MODULE_LICENSE("GPL"); 939