926 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*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/mod_devicetable.h>16#include <linux/module.h>17#include <linux/mutex.h>18#include <linux/of.h>19#include <linux/power_supply.h>20#include <linux/regmap.h>21#include <linux/regulator/driver.h>22#include <linux/sysfs.h>23 24#define RT9471_REG_OTGCFG 0x0025#define RT9471_REG_TOP 0x0126#define RT9471_REG_FUNC 0x0227#define RT9471_REG_IBUS 0x0328#define RT9471_REG_VBUS 0x0429#define RT9471_REG_PRECHG 0x0530#define RT9471_REG_VCHG 0x0731#define RT9471_REG_ICHG 0x0832#define RT9471_REG_CHGTMR 0x0933#define RT9471_REG_EOC 0x0A34#define RT9471_REG_INFO 0x0B35#define RT9471_REG_JEITA 0x0C36#define RT9471_REG_PUMP_EXP 0x0D37#define RT9471_REG_DPDMDET 0x0E38#define RT9471_REG_ICSTAT 0x0F39#define RT9471_REG_STAT0 0x1040#define RT9471_REG_STAT1 0x1141#define RT9471_REG_STAT2 0x1242#define RT9471_REG_IRQ0 0x2043#define RT9471_REG_MASK0 0x3044 45#define RT9471_OTGCV_MASK GENMASK(7, 6)46#define RT9471_OTGCC_MASK BIT(0)47#define RT9471_OTGEN_MASK BIT(1)48#define RT9471_CHGFAULT_MASK GENMASK(4, 1)49 50#define RT9471_NUM_IRQ_REGS 451#define RT9471_OTGCV_MINUV 485000052#define RT9471_OTGCV_STEPUV 15000053#define RT9471_NUM_VOTG 454#define RT9471_VCHG_MAXUV 470000055#define RT9471_ICHG_MAXUA 315000056 57/* Device ID */58#define RT9470_DEVID 0x0959#define RT9470D_DEVID 0x0A60#define RT9471_DEVID 0x0D61#define RT9471D_DEVID 0x0E62 63/* IRQ number */64#define RT9471_IRQ_BC12_DONE 065#define RT9471_IRQ_DETACH 166#define RT9471_IRQ_RECHG 267#define RT9471_IRQ_CHG_DONE 368#define RT9471_IRQ_BG_CHG 469#define RT9471_IRQ_IE0C 570#define RT9471_IRQ_CHG_RDY 671#define RT9471_IRQ_VBUS_GD 772#define RT9471_IRQ_CHG_BATOV 973#define RT9471_IRQ_CHG_SYSOV 1074#define RT9471_IRQ_CHG_TOUT 1175#define RT9471_IRQ_CHG_BUSUV 1276#define RT9471_IRQ_CHG_THREG 1377#define RT9471_IRQ_CHG_AICR 1478#define RT9471_IRQ_CHG_MIVR 1579#define RT9471_IRQ_SYS_SHORT 1680#define RT9471_IRQ_SYS_MIN 1781#define RT9471_IRQ_AICC_DONE 1882#define RT9471_IRQ_PE_DONE 1983#define RT9471_IRQ_JEITA_COLD 2084#define RT9471_IRQ_JEITA_COOL 2185#define RT9471_IRQ_JEITA_WARM 2286#define RT9471_IRQ_JEITA_HOT 2387#define RT9471_IRQ_OTG_FAULT 2488#define RT9471_IRQ_OTG_LBP 2589#define RT9471_IRQ_OTG_CC 2690#define RT9471_IRQ_WDT 2991#define RT9471_IRQ_VAC_OV 3092#define RT9471_IRQ_OTP 3193 94enum rt9471_fields {95 F_WDT = 0,96 F_WDT_RST,97 F_CHG_EN,98 F_HZ,99 F_BATFET_DIS,100 F_AICR,101 F_AICC_EN,102 F_MIVR,103 F_IPRE_CHG,104 F_VPRE_CHG,105 F_VBAT_REG,106 F_ICHG_REG,107 F_EOC_RST,108 F_TE,109 F_IEOC_CHG,110 F_DEVICE_ID,111 F_REG_RST,112 F_BC12_EN,113 F_IC_STAT,114 F_PORT_STAT,115 F_ST_CHG_DONE,116 F_ST_CHG_RDY,117 F_ST_VBUS_GD,118 F_MAX_FIELDS119};120 121enum rt9471_ranges {122 RT9471_RANGE_AICR = 0,123 RT9471_RANGE_MIVR,124 RT9471_RANGE_IPRE,125 RT9471_RANGE_VCHG,126 RT9471_RANGE_ICHG,127 RT9471_RANGE_IEOC,128 RT9471_MAX_RANGES129};130 131enum {132 RT9471_PORTSTAT_APPLE_10W = 8,133 RT9471_PORTSTAT_SAMSUNG_10W,134 RT9471_PORTSTAT_APPLE_5W,135 RT9471_PORTSTAT_APPLE_12W,136 RT9471_PORTSTAT_NSTD,137 RT9471_PORTSTAT_SDP,138 RT9471_PORTSTAT_CDP,139 RT9471_PORTSTAT_DCP,140};141 142struct rt9471_chip {143 struct device *dev;144 struct regmap *regmap;145 struct regmap_field *rm_fields[F_MAX_FIELDS];146 struct regmap_irq_chip_data *irq_chip_data;147 struct regulator_dev *otg_rdev;148 struct power_supply *psy;149 struct power_supply_desc psy_desc;150 struct mutex var_lock;151 enum power_supply_usb_type psy_usb_type;152 int psy_usb_curr;153};154 155static const struct reg_field rt9471_reg_fields[F_MAX_FIELDS] = {156 [F_WDT] = REG_FIELD(RT9471_REG_TOP, 0, 0),157 [F_WDT_RST] = REG_FIELD(RT9471_REG_TOP, 1, 1),158 [F_CHG_EN] = REG_FIELD(RT9471_REG_FUNC, 0, 0),159 [F_HZ] = REG_FIELD(RT9471_REG_FUNC, 5, 5),160 [F_BATFET_DIS] = REG_FIELD(RT9471_REG_FUNC, 7, 7),161 [F_AICR] = REG_FIELD(RT9471_REG_IBUS, 0, 5),162 [F_AICC_EN] = REG_FIELD(RT9471_REG_IBUS, 7, 7),163 [F_MIVR] = REG_FIELD(RT9471_REG_VBUS, 0, 3),164 [F_IPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 0, 3),165 [F_VPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 4, 6),166 [F_VBAT_REG] = REG_FIELD(RT9471_REG_VCHG, 0, 6),167 [F_ICHG_REG] = REG_FIELD(RT9471_REG_ICHG, 0, 5),168 [F_EOC_RST] = REG_FIELD(RT9471_REG_EOC, 0, 0),169 [F_TE] = REG_FIELD(RT9471_REG_EOC, 1, 1),170 [F_IEOC_CHG] = REG_FIELD(RT9471_REG_EOC, 4, 7),171 [F_DEVICE_ID] = REG_FIELD(RT9471_REG_INFO, 3, 6),172 [F_REG_RST] = REG_FIELD(RT9471_REG_INFO, 7, 7),173 [F_BC12_EN] = REG_FIELD(RT9471_REG_DPDMDET, 7, 7),174 [F_IC_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 0, 3),175 [F_PORT_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 4, 7),176 [F_ST_CHG_DONE] = REG_FIELD(RT9471_REG_STAT0, 3, 3),177 [F_ST_CHG_RDY] = REG_FIELD(RT9471_REG_STAT0, 6, 6),178 [F_ST_VBUS_GD] = REG_FIELD(RT9471_REG_STAT0, 7, 7),179};180 181static const struct linear_range rt9471_chg_ranges[RT9471_MAX_RANGES] = {182 [RT9471_RANGE_AICR] = { .min = 50000, .min_sel = 1, .max_sel = 63, .step = 50000 },183 [RT9471_RANGE_MIVR] = { .min = 3900000, .min_sel = 0, .max_sel = 15, .step = 100000 },184 [RT9471_RANGE_IPRE] = { .min = 50000, .min_sel = 0, .max_sel = 15, .step = 50000 },185 [RT9471_RANGE_VCHG] = { .min = 3900000, .min_sel = 0, .max_sel = 80, .step = 10000 },186 [RT9471_RANGE_ICHG] = { .min = 0, .min_sel = 0, .max_sel = 63, .step = 50000 },187 [RT9471_RANGE_IEOC] = { .min = 50000, .min_sel = 0, .max_sel = 15, .step = 50000 },188};189 190static int rt9471_set_value_by_field_range(struct rt9471_chip *chip,191 enum rt9471_fields field,192 enum rt9471_ranges range, int val)193{194 unsigned int sel;195 196 if (val < 0)197 return -EINVAL;198 199 linear_range_get_selector_within(rt9471_chg_ranges + range, val, &sel);200 201 return regmap_field_write(chip->rm_fields[field], sel);202}203 204 205static int rt9471_get_value_by_field_range(struct rt9471_chip *chip,206 enum rt9471_fields field,207 enum rt9471_ranges range, int *val)208{209 unsigned int sel, rvalue;210 int ret;211 212 ret = regmap_field_read(chip->rm_fields[field], &sel);213 if (ret)214 return ret;215 216 ret = linear_range_get_value(rt9471_chg_ranges + range, sel, &rvalue);217 if (ret)218 return ret;219 220 *val = rvalue;221 return 0;222}223 224static int rt9471_set_ieoc(struct rt9471_chip *chip, int microamp)225{226 int ret;227 228 if (microamp == 0)229 return regmap_field_write(chip->rm_fields[F_TE], 0);230 231 ret = rt9471_set_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);232 if (ret)233 return ret;234 235 /* After applying the new IEOC value, enable charge termination */236 return regmap_field_write(chip->rm_fields[F_TE], 1);237}238 239static int rt9471_get_ieoc(struct rt9471_chip *chip, int *microamp)240{241 unsigned int chg_term_enable;242 int ret;243 244 ret = regmap_field_read(chip->rm_fields[F_TE], &chg_term_enable);245 if (ret)246 return ret;247 248 if (!chg_term_enable) {249 *microamp = 0;250 return 0;251 }252 253 return rt9471_get_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);254}255 256static int rt9471_get_status(struct rt9471_chip *chip, int *status)257{258 unsigned int chg_ready, chg_done, fault_stat;259 int ret;260 261 ret = regmap_field_read(chip->rm_fields[F_ST_CHG_RDY], &chg_ready);262 if (ret)263 return ret;264 265 ret = regmap_field_read(chip->rm_fields[F_ST_CHG_DONE], &chg_done);266 if (ret)267 return ret;268 269 ret = regmap_read(chip->regmap, RT9471_REG_STAT1, &fault_stat);270 if (ret)271 return ret;272 273 fault_stat &= RT9471_CHGFAULT_MASK;274 275 if (chg_ready && chg_done)276 *status = POWER_SUPPLY_STATUS_FULL;277 else if (chg_ready && fault_stat)278 *status = POWER_SUPPLY_STATUS_NOT_CHARGING;279 else if (chg_ready && !fault_stat)280 *status = POWER_SUPPLY_STATUS_CHARGING;281 else282 *status = POWER_SUPPLY_STATUS_DISCHARGING;283 284 return 0;285}286 287static int rt9471_get_vbus_good(struct rt9471_chip *chip, int *stat)288{289 unsigned int vbus_gd;290 int ret;291 292 ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd);293 if (ret)294 return ret;295 296 *stat = vbus_gd;297 return 0;298}299 300static int rt9471_get_usb_type(struct rt9471_chip *chip, int *usb_type)301{302 mutex_lock(&chip->var_lock);303 *usb_type = chip->psy_usb_type;304 mutex_unlock(&chip->var_lock);305 306 return 0;307}308 309static int rt9471_get_usb_type_current(struct rt9471_chip *chip,310 int *microamp)311{312 mutex_lock(&chip->var_lock);313 *microamp = chip->psy_usb_curr;314 mutex_unlock(&chip->var_lock);315 316 return 0;317}318 319static enum power_supply_property rt9471_charger_properties[] = {320 POWER_SUPPLY_PROP_STATUS,321 POWER_SUPPLY_PROP_ONLINE,322 POWER_SUPPLY_PROP_CURRENT_MAX,323 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,324 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,325 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,326 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,327 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,328 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,329 POWER_SUPPLY_PROP_USB_TYPE,330 POWER_SUPPLY_PROP_PRECHARGE_CURRENT,331 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,332 POWER_SUPPLY_PROP_MODEL_NAME,333 POWER_SUPPLY_PROP_MANUFACTURER,334};335 336static int rt9471_charger_property_is_writeable(struct power_supply *psy,337 enum power_supply_property psp)338{339 switch (psp) {340 case POWER_SUPPLY_PROP_STATUS:341 case POWER_SUPPLY_PROP_ONLINE:342 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:343 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:344 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:345 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:346 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:347 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:348 return 1;349 default:350 return 0;351 }352}353 354static int rt9471_charger_set_property(struct power_supply *psy,355 enum power_supply_property psp,356 const union power_supply_propval *val)357{358 struct rt9471_chip *chip = power_supply_get_drvdata(psy);359 int value = val->intval;360 361 switch (psp) {362 case POWER_SUPPLY_PROP_STATUS:363 return regmap_field_write(chip->rm_fields[F_CHG_EN], !!value);364 case POWER_SUPPLY_PROP_ONLINE:365 return regmap_field_write(chip->rm_fields[F_HZ], !value);366 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:367 return rt9471_set_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, value);368 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:369 return rt9471_set_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, value);370 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:371 return rt9471_set_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, value);372 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:373 return rt9471_set_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, value);374 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:375 return rt9471_set_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, value);376 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:377 return rt9471_set_ieoc(chip, val->intval);378 default:379 return -EINVAL;380 }381}382 383static const char * const rt9471_manufacturer = "Richtek Technology Corp.";384static const char * const rt9471_model = "RT9471";385 386static int rt9471_charger_get_property(struct power_supply *psy,387 enum power_supply_property psp,388 union power_supply_propval *val)389{390 struct rt9471_chip *chip = power_supply_get_drvdata(psy);391 int *pvalue = &val->intval;392 393 switch (psp) {394 case POWER_SUPPLY_PROP_STATUS:395 return rt9471_get_status(chip, pvalue);396 case POWER_SUPPLY_PROP_ONLINE:397 return rt9471_get_vbus_good(chip, pvalue);398 case POWER_SUPPLY_PROP_CURRENT_MAX:399 return rt9471_get_usb_type_current(chip, pvalue);400 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:401 return rt9471_get_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, pvalue);402 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:403 *pvalue = RT9471_ICHG_MAXUA;404 return 0;405 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:406 return rt9471_get_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, pvalue);407 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:408 val->intval = RT9471_VCHG_MAXUV;409 return 0;410 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:411 return rt9471_get_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, pvalue);412 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:413 return rt9471_get_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, pvalue);414 case POWER_SUPPLY_PROP_USB_TYPE:415 return rt9471_get_usb_type(chip, pvalue);416 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:417 return rt9471_get_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, pvalue);418 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:419 return rt9471_get_ieoc(chip, pvalue);420 case POWER_SUPPLY_PROP_MODEL_NAME:421 val->strval = rt9471_model;422 return 0;423 case POWER_SUPPLY_PROP_MANUFACTURER:424 val->strval = rt9471_manufacturer;425 return 0;426 default:427 return -ENODATA;428 }429}430 431static irqreturn_t rt9471_vbus_gd_handler(int irqno, void *devid)432{433 struct rt9471_chip *chip = devid;434 435 power_supply_changed(chip->psy);436 437 return IRQ_HANDLED;438}439 440static irqreturn_t rt9471_detach_handler(int irqno, void *devid)441{442 struct rt9471_chip *chip = devid;443 unsigned int vbus_gd;444 int ret;445 446 ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd);447 if (ret)448 return IRQ_NONE;449 450 /* Only focus on really detached */451 if (vbus_gd)452 return IRQ_HANDLED;453 454 mutex_lock(&chip->var_lock);455 chip->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;456 chip->psy_usb_curr = 0;457 mutex_unlock(&chip->var_lock);458 459 power_supply_changed(chip->psy);460 461 return IRQ_HANDLED;462}463 464static irqreturn_t rt9471_bc12_done_handler(int irqno, void *devid)465{466 struct rt9471_chip *chip = devid;467 enum power_supply_usb_type usb_type;468 unsigned int port_stat;469 int usb_curr, ret;470 471 ret = regmap_field_read(chip->rm_fields[F_PORT_STAT], &port_stat);472 if (ret)473 return IRQ_NONE;474 475 switch (port_stat) {476 case RT9471_PORTSTAT_APPLE_10W:477 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;478 usb_curr = 2000000;479 break;480 case RT9471_PORTSTAT_APPLE_5W:481 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;482 usb_curr = 1000000;483 break;484 case RT9471_PORTSTAT_APPLE_12W:485 usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;486 usb_curr = 2400000;487 break;488 case RT9471_PORTSTAT_SAMSUNG_10W:489 usb_type = POWER_SUPPLY_USB_TYPE_DCP;490 usb_curr = 2000000;491 break;492 case RT9471_PORTSTAT_DCP:493 usb_type = POWER_SUPPLY_USB_TYPE_DCP;494 usb_curr = 1500000;495 break;496 case RT9471_PORTSTAT_NSTD:497 case RT9471_PORTSTAT_SDP:498 usb_type = POWER_SUPPLY_USB_TYPE_SDP;499 usb_curr = 500000;500 break;501 case RT9471_PORTSTAT_CDP:502 usb_type = POWER_SUPPLY_USB_TYPE_CDP;503 usb_curr = 1500000;504 break;505 default:506 usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;507 usb_curr = 0;508 break;509 }510 511 mutex_lock(&chip->var_lock);512 chip->psy_usb_type = usb_type;513 chip->psy_usb_curr = usb_curr;514 mutex_unlock(&chip->var_lock);515 516 power_supply_changed(chip->psy);517 518 return IRQ_HANDLED;519}520 521static irqreturn_t rt9471_wdt_handler(int irqno, void *devid)522{523 struct rt9471_chip *chip = devid;524 int ret;525 526 ret = regmap_field_write(chip->rm_fields[F_WDT_RST], 1);527 528 return ret ? IRQ_NONE : IRQ_HANDLED;529}530 531static irqreturn_t rt9471_otg_fault_handler(int irqno, void *devid)532{533 struct rt9471_chip *chip = devid;534 535 regulator_notifier_call_chain(chip->otg_rdev, REGULATOR_EVENT_FAIL, NULL);536 537 return IRQ_HANDLED;538}539 540#define RT9471_IRQ_DESC(_name, _hwirq) \541{ \542 .name = #_name, \543 .hwirq = _hwirq, \544 .handler = rt9471_##_name##_handler, \545}546 547static int rt9471_register_interrupts(struct rt9471_chip *chip)548{549 struct device *dev = chip->dev;550 static const struct {551 char *name;552 int hwirq;553 irq_handler_t handler;554 } chg_irqs[] = {555 RT9471_IRQ_DESC(vbus_gd, RT9471_IRQ_VBUS_GD),556 RT9471_IRQ_DESC(detach, RT9471_IRQ_DETACH),557 RT9471_IRQ_DESC(bc12_done, RT9471_IRQ_BC12_DONE),558 RT9471_IRQ_DESC(wdt, RT9471_IRQ_WDT),559 RT9471_IRQ_DESC(otg_fault, RT9471_IRQ_OTG_FAULT),560 }, *curr;561 int i, virq, ret;562 563 for (i = 0; i < ARRAY_SIZE(chg_irqs); i++) {564 curr = chg_irqs + i;565 566 virq = regmap_irq_get_virq(chip->irq_chip_data, curr->hwirq);567 if (virq <= 0)568 return virq;569 570 ret = devm_request_threaded_irq(dev, virq, NULL, curr->handler,571 IRQF_ONESHOT, curr->name, chip);572 if (ret)573 return dev_err_probe(dev, ret, "Failed to register IRQ (%s)\n",574 curr->name);575 }576 577 return 0;578}579 580static const struct regulator_ops rt9471_otg_ops = {581 .enable = regulator_enable_regmap,582 .disable = regulator_disable_regmap,583 .is_enabled = regulator_is_enabled_regmap,584 .list_voltage = regulator_list_voltage_linear,585 .get_voltage_sel = regulator_get_voltage_sel_regmap,586 .set_voltage_sel = regulator_set_voltage_sel_regmap,587 .set_current_limit = regulator_set_current_limit_regmap,588 .get_current_limit = regulator_get_current_limit_regmap,589};590 591static const unsigned int rt9471_otg_microamp[] = { 500000, 1200000, };592 593static const struct regulator_desc rt9471_otg_rdesc = {594 .of_match = of_match_ptr("usb-otg-vbus-regulator"),595 .name = "rt9471-otg-vbus",596 .owner = THIS_MODULE,597 .type = REGULATOR_VOLTAGE,598 .ops = &rt9471_otg_ops,599 .min_uV = RT9471_OTGCV_MINUV,600 .uV_step = RT9471_OTGCV_STEPUV,601 .n_voltages = RT9471_NUM_VOTG,602 .curr_table = rt9471_otg_microamp,603 .n_current_limits = ARRAY_SIZE(rt9471_otg_microamp),604 .enable_mask = RT9471_OTGEN_MASK,605 .enable_reg = RT9471_REG_FUNC,606 .vsel_reg = RT9471_REG_OTGCFG,607 .vsel_mask = RT9471_OTGCV_MASK,608 .csel_reg = RT9471_REG_OTGCFG,609 .csel_mask = RT9471_OTGCC_MASK,610};611 612static int rt9471_register_otg_regulator(struct rt9471_chip *chip)613{614 struct device *dev = chip->dev;615 struct regulator_config cfg = { .dev = dev, .driver_data = chip };616 617 chip->otg_rdev = devm_regulator_register(dev, &rt9471_otg_rdesc, &cfg);618 619 return PTR_ERR_OR_ZERO(chip->otg_rdev);620}621 622static inline struct rt9471_chip *psy_device_to_chip(struct device *dev)623{624 return power_supply_get_drvdata(to_power_supply(dev));625}626 627static ssize_t sysoff_enable_show(struct device *dev,628 struct device_attribute *attr, char *buf)629{630 struct rt9471_chip *chip = psy_device_to_chip(dev);631 unsigned int sysoff_enable;632 int ret;633 634 ret = regmap_field_read(chip->rm_fields[F_BATFET_DIS], &sysoff_enable);635 if (ret)636 return ret;637 638 return sysfs_emit(buf, "%d\n", sysoff_enable);639}640 641static ssize_t sysoff_enable_store(struct device *dev,642 struct device_attribute *attr,643 const char *buf, size_t count)644{645 struct rt9471_chip *chip = psy_device_to_chip(dev);646 unsigned int tmp;647 int ret;648 649 ret = kstrtouint(buf, 10, &tmp);650 if (ret)651 return ret;652 653 ret = regmap_field_write(chip->rm_fields[F_BATFET_DIS], !!tmp);654 if (ret)655 return ret;656 657 return count;658}659 660static ssize_t port_detect_enable_show(struct device *dev,661 struct device_attribute *attr, char *buf)662{663 struct rt9471_chip *chip = psy_device_to_chip(dev);664 unsigned int bc12_enable;665 int ret;666 667 ret = regmap_field_read(chip->rm_fields[F_BC12_EN], &bc12_enable);668 if (ret)669 return ret;670 671 return sysfs_emit(buf, "%d\n", bc12_enable);672}673 674static ssize_t port_detect_enable_store(struct device *dev,675 struct device_attribute *attr,676 const char *buf, size_t count)677{678 struct rt9471_chip *chip = psy_device_to_chip(dev);679 unsigned int tmp;680 int ret;681 682 ret = kstrtouint(buf, 10, &tmp);683 if (ret)684 return ret;685 686 ret = regmap_field_write(chip->rm_fields[F_BC12_EN], !!tmp);687 if (ret)688 return ret;689 690 return count;691}692 693static DEVICE_ATTR_RW(sysoff_enable);694static DEVICE_ATTR_RW(port_detect_enable);695 696static struct attribute *rt9471_sysfs_attrs[] = {697 &dev_attr_sysoff_enable.attr,698 &dev_attr_port_detect_enable.attr,699 NULL700};701 702ATTRIBUTE_GROUPS(rt9471_sysfs);703 704static int rt9471_register_psy(struct rt9471_chip *chip)705{706 struct device *dev = chip->dev;707 struct power_supply_desc *desc = &chip->psy_desc;708 struct power_supply_config cfg = {};709 char *psy_name;710 711 cfg.drv_data = chip;712 cfg.of_node = dev->of_node;713 cfg.attr_grp = rt9471_sysfs_groups;714 715 psy_name = devm_kasprintf(dev, GFP_KERNEL, "rt9471-%s", dev_name(dev));716 if (!psy_name)717 return -ENOMEM;718 719 desc->name = psy_name;720 desc->type = POWER_SUPPLY_TYPE_USB;721 desc->usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) |722 BIT(POWER_SUPPLY_USB_TYPE_CDP) |723 BIT(POWER_SUPPLY_USB_TYPE_DCP) |724 BIT(POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID) |725 BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN);726 desc->properties = rt9471_charger_properties;727 desc->num_properties = ARRAY_SIZE(rt9471_charger_properties);728 desc->get_property = rt9471_charger_get_property;729 desc->set_property = rt9471_charger_set_property;730 desc->property_is_writeable = rt9471_charger_property_is_writeable;731 732 chip->psy = devm_power_supply_register(dev, desc, &cfg);733 734 return PTR_ERR_OR_ZERO(chip->psy);735}736 737static const struct regmap_irq rt9471_regmap_irqs[] = {738 REGMAP_IRQ_REG_LINE(RT9471_IRQ_BC12_DONE, 8),739 REGMAP_IRQ_REG_LINE(RT9471_IRQ_DETACH, 8),740 REGMAP_IRQ_REG_LINE(RT9471_IRQ_RECHG, 8),741 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_DONE, 8),742 REGMAP_IRQ_REG_LINE(RT9471_IRQ_BG_CHG, 8),743 REGMAP_IRQ_REG_LINE(RT9471_IRQ_IE0C, 8),744 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_RDY, 8),745 REGMAP_IRQ_REG_LINE(RT9471_IRQ_VBUS_GD, 8),746 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BATOV, 8),747 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_SYSOV, 8),748 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_TOUT, 8),749 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BUSUV, 8),750 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_THREG, 8),751 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_AICR, 8),752 REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_MIVR, 8),753 REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_SHORT, 8),754 REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_MIN, 8),755 REGMAP_IRQ_REG_LINE(RT9471_IRQ_AICC_DONE, 8),756 REGMAP_IRQ_REG_LINE(RT9471_IRQ_PE_DONE, 8),757 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COLD, 8),758 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COOL, 8),759 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_WARM, 8),760 REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_HOT, 8),761 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_FAULT, 8),762 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_LBP, 8),763 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_CC, 8),764 REGMAP_IRQ_REG_LINE(RT9471_IRQ_WDT, 8),765 REGMAP_IRQ_REG_LINE(RT9471_IRQ_VAC_OV, 8),766 REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTP, 8),767};768 769static const struct regmap_irq_chip rt9471_irq_chip = {770 .name = "rt9471-irqs",771 .status_base = RT9471_REG_IRQ0,772 .mask_base = RT9471_REG_MASK0,773 .num_regs = RT9471_NUM_IRQ_REGS,774 .irqs = rt9471_regmap_irqs,775 .num_irqs = ARRAY_SIZE(rt9471_regmap_irqs),776};777 778static const struct reg_sequence rt9471_init_regs[] = {779 REG_SEQ0(RT9471_REG_INFO, 0x80), /* REG_RST */780 REG_SEQ0(RT9471_REG_TOP, 0xC0), /* WDT = 0 */781 REG_SEQ0(RT9471_REG_FUNC, 0x01), /* BATFET_DIS_DLY = 0 */782 REG_SEQ0(RT9471_REG_IBUS, 0x0A), /* AUTO_AICR = 0 */783 REG_SEQ0(RT9471_REG_VBUS, 0xC6), /* VAC_OVP = 14V */784 REG_SEQ0(RT9471_REG_JEITA, 0x38), /* JEITA = 0 */785 REG_SEQ0(RT9471_REG_DPDMDET, 0x31), /* BC12_EN = 0, DCP_DP_OPT = 1 */786};787 788static int rt9471_check_devinfo(struct rt9471_chip *chip)789{790 struct device *dev = chip->dev;791 unsigned int dev_id;792 int ret;793 794 ret = regmap_field_read(chip->rm_fields[F_DEVICE_ID], &dev_id);795 if (ret)796 return dev_err_probe(dev, ret, "Failed to read device_id\n");797 798 switch (dev_id) {799 case RT9470_DEVID:800 case RT9470D_DEVID:801 case RT9471_DEVID:802 case RT9471D_DEVID:803 return 0;804 default:805 return dev_err_probe(dev, -ENODEV, "Incorrect device id\n");806 }807}808 809static bool rt9471_accessible_reg(struct device *dev, unsigned int reg)810{811 switch (reg) {812 case 0x00 ... 0x0F:813 case 0x10 ... 0x13:814 case 0x20 ... 0x33:815 case 0x40 ... 0xA1:816 return true;817 default:818 return false;819 }820}821 822static const struct regmap_config rt9471_regmap_config = {823 .reg_bits = 8,824 .val_bits = 8,825 .max_register = 0xA1,826 .writeable_reg = rt9471_accessible_reg,827 .readable_reg = rt9471_accessible_reg,828};829 830static int rt9471_probe(struct i2c_client *i2c)831{832 struct device *dev = &i2c->dev;833 struct rt9471_chip *chip;834 struct gpio_desc *ce_gpio;835 struct regmap *regmap;836 int ret;837 838 chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);839 if (!chip)840 return -ENOMEM;841 842 chip->dev = dev;843 mutex_init(&chip->var_lock);844 i2c_set_clientdata(i2c, chip);845 846 /* Default pull charge enable gpio to make 'CHG_EN' by SW control only */847 ce_gpio = devm_gpiod_get_optional(dev, "charge-enable", GPIOD_OUT_HIGH);848 if (IS_ERR(ce_gpio))849 return dev_err_probe(dev, PTR_ERR(ce_gpio),850 "Failed to config charge enable gpio\n");851 852 regmap = devm_regmap_init_i2c(i2c, &rt9471_regmap_config);853 if (IS_ERR(regmap))854 return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");855 856 chip->regmap = regmap;857 858 ret = devm_regmap_field_bulk_alloc(dev, regmap, chip->rm_fields,859 rt9471_reg_fields,860 ARRAY_SIZE(rt9471_reg_fields));861 if (ret)862 return dev_err_probe(dev, ret, "Failed to alloc regmap field\n");863 864 ret = rt9471_check_devinfo(chip);865 if (ret)866 return ret;867 868 ret = regmap_register_patch(regmap, rt9471_init_regs,869 ARRAY_SIZE(rt9471_init_regs));870 if (ret)871 return dev_err_probe(dev, ret, "Failed to init registers\n");872 873 ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,874 IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,875 &rt9471_irq_chip, &chip->irq_chip_data);876 if (ret)877 return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");878 879 ret = rt9471_register_psy(chip);880 if (ret)881 return dev_err_probe(dev, ret, "Failed to register psy\n");882 883 ret = rt9471_register_otg_regulator(chip);884 if (ret)885 return dev_err_probe(dev, ret, "Failed to register otg\n");886 887 ret = rt9471_register_interrupts(chip);888 if (ret)889 return ret;890 891 /* After IRQs are all initialized, enable port detection by default */892 return regmap_field_write(chip->rm_fields[F_BC12_EN], 1);893}894 895static void rt9471_shutdown(struct i2c_client *i2c)896{897 struct rt9471_chip *chip = i2c_get_clientdata(i2c);898 899 /*900 * There's no external reset pin. Do register reset to guarantee charger901 * function is normal after shutdown902 */903 regmap_field_write(chip->rm_fields[F_REG_RST], 1);904}905 906static const struct of_device_id rt9471_of_device_id[] = {907 { .compatible = "richtek,rt9471" },908 {}909};910MODULE_DEVICE_TABLE(of, rt9471_of_device_id);911 912static struct i2c_driver rt9471_driver = {913 .driver = {914 .name = "rt9471",915 .of_match_table = rt9471_of_device_id,916 },917 .probe = rt9471_probe,918 .shutdown = rt9471_shutdown,919};920module_i2c_driver(rt9471_driver);921 922MODULE_DESCRIPTION("Richtek RT9471 charger driver");923MODULE_AUTHOR("Alina Yu <alina_yu@richtek.com>");924MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");925MODULE_LICENSE("GPL");926