1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * MP2629 battery charger driver 4 * 5 * Copyright 2020 Monolithic Power Systems, Inc 6 * 7 * Author: Saravanan Sekar <sravanhome@gmail.com> 8 */ 9 10#include <linux/bits.h> 11#include <linux/iio/consumer.h> 12#include <linux/iio/types.h> 13#include <linux/interrupt.h> 14#include <linux/mfd/mp2629.h> 15#include <linux/module.h> 16#include <linux/mod_devicetable.h> 17#include <linux/platform_device.h> 18#include <linux/power_supply.h> 19#include <linux/regmap.h> 20 21#define MP2629_REG_INPUT_ILIM 0x00 22#define MP2629_REG_INPUT_VLIM 0x01 23#define MP2629_REG_CHARGE_CTRL 0x04 24#define MP2629_REG_CHARGE_ILIM 0x05 25#define MP2629_REG_PRECHARGE 0x06 26#define MP2629_REG_TERM_CURRENT 0x06 27#define MP2629_REG_CHARGE_VLIM 0x07 28#define MP2629_REG_TIMER_CTRL 0x08 29#define MP2629_REG_IMPEDANCE_COMP 0x09 30#define MP2629_REG_INTERRUPT 0x0b 31#define MP2629_REG_STATUS 0x0c 32#define MP2629_REG_FAULT 0x0d 33 34#define MP2629_MASK_INPUT_TYPE GENMASK(7, 5) 35#define MP2629_MASK_CHARGE_TYPE GENMASK(4, 3) 36#define MP2629_MASK_CHARGE_CTRL GENMASK(5, 4) 37#define MP2629_MASK_WDOG_CTRL GENMASK(5, 4) 38#define MP2629_MASK_IMPEDANCE GENMASK(7, 4) 39 40#define MP2629_INPUTSOURCE_CHANGE GENMASK(7, 5) 41#define MP2629_CHARGING_CHANGE GENMASK(4, 3) 42#define MP2629_FAULT_BATTERY BIT(3) 43#define MP2629_FAULT_THERMAL BIT(4) 44#define MP2629_FAULT_INPUT BIT(5) 45#define MP2629_FAULT_OTG BIT(6) 46 47#define MP2629_MAX_BATT_CAPACITY 100 48 49#define MP2629_PROPS(_idx, _min, _max, _step) \ 50 [_idx] = { \ 51 .min = _min, \ 52 .max = _max, \ 53 .step = _step, \ 54} 55 56enum mp2629_source_type { 57 MP2629_SOURCE_TYPE_NO_INPUT, 58 MP2629_SOURCE_TYPE_NON_STD, 59 MP2629_SOURCE_TYPE_SDP, 60 MP2629_SOURCE_TYPE_CDP, 61 MP2629_SOURCE_TYPE_DCP, 62 MP2629_SOURCE_TYPE_OTG = 7, 63}; 64 65enum mp2629_field { 66 INPUT_ILIM, 67 INPUT_VLIM, 68 CHARGE_ILIM, 69 CHARGE_VLIM, 70 PRECHARGE, 71 TERM_CURRENT, 72 MP2629_MAX_FIELD 73}; 74 75struct mp2629_charger { 76 struct device *dev; 77 int status; 78 int fault; 79 80 struct regmap *regmap; 81 struct regmap_field *regmap_fields[MP2629_MAX_FIELD]; 82 struct mutex lock; 83 struct power_supply *usb; 84 struct power_supply *battery; 85 struct iio_channel *iiochan[MP2629_ADC_CHAN_END]; 86}; 87 88struct mp2629_prop { 89 int reg; 90 int mask; 91 int min; 92 int max; 93 int step; 94 int shift; 95}; 96 97static enum power_supply_usb_type mp2629_usb_types[] = { 98 POWER_SUPPLY_USB_TYPE_SDP, 99 POWER_SUPPLY_USB_TYPE_DCP, 100 POWER_SUPPLY_USB_TYPE_CDP, 101 POWER_SUPPLY_USB_TYPE_PD_DRP, 102 POWER_SUPPLY_USB_TYPE_UNKNOWN 103}; 104 105static enum power_supply_property mp2629_charger_usb_props[] = { 106 POWER_SUPPLY_PROP_ONLINE, 107 POWER_SUPPLY_PROP_USB_TYPE, 108 POWER_SUPPLY_PROP_VOLTAGE_NOW, 109 POWER_SUPPLY_PROP_CURRENT_NOW, 110 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 111 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, 112}; 113 114static enum power_supply_property mp2629_charger_bat_props[] = { 115 POWER_SUPPLY_PROP_STATUS, 116 POWER_SUPPLY_PROP_HEALTH, 117 POWER_SUPPLY_PROP_CHARGE_TYPE, 118 POWER_SUPPLY_PROP_VOLTAGE_NOW, 119 POWER_SUPPLY_PROP_CURRENT_NOW, 120 POWER_SUPPLY_PROP_CAPACITY, 121 POWER_SUPPLY_PROP_PRECHARGE_CURRENT, 122 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, 123 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, 124 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, 125 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, 126 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, 127}; 128 129static struct mp2629_prop props[] = { 130 MP2629_PROPS(INPUT_ILIM, 100000, 3250000, 50000), 131 MP2629_PROPS(INPUT_VLIM, 3800000, 5300000, 100000), 132 MP2629_PROPS(CHARGE_ILIM, 320000, 4520000, 40000), 133 MP2629_PROPS(CHARGE_VLIM, 3400000, 4670000, 10000), 134 MP2629_PROPS(PRECHARGE, 120000, 720000, 40000), 135 MP2629_PROPS(TERM_CURRENT, 80000, 680000, 40000), 136}; 137 138static const struct reg_field mp2629_reg_fields[] = { 139 [INPUT_ILIM] = REG_FIELD(MP2629_REG_INPUT_ILIM, 0, 5), 140 [INPUT_VLIM] = REG_FIELD(MP2629_REG_INPUT_VLIM, 0, 3), 141 [CHARGE_ILIM] = REG_FIELD(MP2629_REG_CHARGE_ILIM, 0, 6), 142 [CHARGE_VLIM] = REG_FIELD(MP2629_REG_CHARGE_VLIM, 1, 7), 143 [PRECHARGE] = REG_FIELD(MP2629_REG_PRECHARGE, 4, 7), 144 [TERM_CURRENT] = REG_FIELD(MP2629_REG_TERM_CURRENT, 0, 3), 145}; 146 147static char *adc_chan_name[] = { 148 "mp2629-batt-volt", 149 "mp2629-system-volt", 150 "mp2629-input-volt", 151 "mp2629-batt-current", 152 "mp2629-input-current", 153}; 154 155static int mp2629_read_adc(struct mp2629_charger *charger, 156 enum mp2629_adc_chan ch, 157 union power_supply_propval *val) 158{ 159 int ret; 160 int chval; 161 162 ret = iio_read_channel_processed(charger->iiochan[ch], &chval); 163 if (ret) 164 return ret; 165 166 val->intval = chval * 1000; 167 168 return 0; 169} 170 171static int mp2629_get_prop(struct mp2629_charger *charger, 172 enum mp2629_field fld, 173 union power_supply_propval *val) 174{ 175 int ret; 176 unsigned int rval; 177 178 ret = regmap_field_read(charger->regmap_fields[fld], &rval); 179 if (ret) 180 return ret; 181 182 val->intval = rval * props[fld].step + props[fld].min; 183 184 return 0; 185} 186 187static int mp2629_set_prop(struct mp2629_charger *charger, 188 enum mp2629_field fld, 189 const union power_supply_propval *val) 190{ 191 unsigned int rval; 192 193 if (val->intval < props[fld].min || val->intval > props[fld].max) 194 return -EINVAL; 195 196 rval = (val->intval - props[fld].min) / props[fld].step; 197 return regmap_field_write(charger->regmap_fields[fld], rval); 198} 199 200static int mp2629_get_battery_capacity(struct mp2629_charger *charger, 201 union power_supply_propval *val) 202{ 203 union power_supply_propval vnow, vlim; 204 int ret; 205 206 ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, &vnow); 207 if (ret) 208 return ret; 209 210 ret = mp2629_get_prop(charger, CHARGE_VLIM, &vlim); 211 if (ret) 212 return ret; 213 214 val->intval = (vnow.intval * 100) / vlim.intval; 215 val->intval = min(val->intval, MP2629_MAX_BATT_CAPACITY); 216 217 return 0; 218} 219 220static int mp2629_charger_battery_get_prop(struct power_supply *psy, 221 enum power_supply_property psp, 222 union power_supply_propval *val) 223{ 224 struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent); 225 unsigned int rval; 226 int ret = 0; 227 228 switch (psp) { 229 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 230 ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, val); 231 break; 232 233 case POWER_SUPPLY_PROP_CURRENT_NOW: 234 ret = mp2629_read_adc(charger, MP2629_BATT_CURRENT, val); 235 break; 236 237 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: 238 val->intval = 4520000; 239 break; 240 241 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: 242 val->intval = 4670000; 243 break; 244 245 case POWER_SUPPLY_PROP_CAPACITY: 246 ret = mp2629_get_battery_capacity(charger, val); 247 break; 248 249 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 250 ret = mp2629_get_prop(charger, TERM_CURRENT, val); 251 break; 252 253 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 254 ret = mp2629_get_prop(charger, PRECHARGE, val); 255 break; 256 257 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 258 ret = mp2629_get_prop(charger, CHARGE_VLIM, val); 259 break; 260 261 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 262 ret = mp2629_get_prop(charger, CHARGE_ILIM, val); 263 break; 264 265 case POWER_SUPPLY_PROP_HEALTH: 266 if (!charger->fault) 267 val->intval = POWER_SUPPLY_HEALTH_GOOD; 268 if (MP2629_FAULT_BATTERY & charger->fault) 269 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; 270 else if (MP2629_FAULT_THERMAL & charger->fault) 271 val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; 272 else if (MP2629_FAULT_INPUT & charger->fault) 273 val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE; 274 break; 275 276 case POWER_SUPPLY_PROP_STATUS: 277 ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval); 278 if (ret) 279 break; 280 281 rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3; 282 switch (rval) { 283 case 0x00: 284 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 285 break; 286 case 0x01: 287 case 0x10: 288 val->intval = POWER_SUPPLY_STATUS_CHARGING; 289 break; 290 case 0x11: 291 val->intval = POWER_SUPPLY_STATUS_FULL; 292 } 293 break; 294 295 case POWER_SUPPLY_PROP_CHARGE_TYPE: 296 ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval); 297 if (ret) 298 break; 299 300 rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3; 301 switch (rval) { 302 case 0x00: 303 val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; 304 break; 305 case 0x01: 306 val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; 307 break; 308 case 0x10: 309 val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD; 310 break; 311 default: 312 val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; 313 } 314 break; 315 316 default: 317 return -EINVAL; 318 } 319 320 return ret; 321} 322 323static int mp2629_charger_battery_set_prop(struct power_supply *psy, 324 enum power_supply_property psp, 325 const union power_supply_propval *val) 326{ 327 struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent); 328 329 switch (psp) { 330 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 331 return mp2629_set_prop(charger, TERM_CURRENT, val); 332 333 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 334 return mp2629_set_prop(charger, PRECHARGE, val); 335 336 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 337 return mp2629_set_prop(charger, CHARGE_VLIM, val); 338 339 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 340 return mp2629_set_prop(charger, CHARGE_ILIM, val); 341 342 default: 343 return -EINVAL; 344 } 345} 346 347static int mp2629_charger_usb_get_prop(struct power_supply *psy, 348 enum power_supply_property psp, 349 union power_supply_propval *val) 350{ 351 struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent); 352 unsigned int rval; 353 int ret; 354 355 switch (psp) { 356 case POWER_SUPPLY_PROP_ONLINE: 357 ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval); 358 if (ret) 359 break; 360 361 val->intval = !!(rval & MP2629_MASK_INPUT_TYPE); 362 break; 363 364 case POWER_SUPPLY_PROP_USB_TYPE: 365 ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval); 366 if (ret) 367 break; 368 369 rval = (rval & MP2629_MASK_INPUT_TYPE) >> 5; 370 switch (rval) { 371 case MP2629_SOURCE_TYPE_SDP: 372 val->intval = POWER_SUPPLY_USB_TYPE_SDP; 373 break; 374 case MP2629_SOURCE_TYPE_CDP: 375 val->intval = POWER_SUPPLY_USB_TYPE_CDP; 376 break; 377 case MP2629_SOURCE_TYPE_DCP: 378 val->intval = POWER_SUPPLY_USB_TYPE_DCP; 379 break; 380 case MP2629_SOURCE_TYPE_OTG: 381 val->intval = POWER_SUPPLY_USB_TYPE_PD_DRP; 382 break; 383 default: 384 val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN; 385 break; 386 } 387 break; 388 389 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 390 ret = mp2629_read_adc(charger, MP2629_INPUT_VOLT, val); 391 break; 392 393 case POWER_SUPPLY_PROP_CURRENT_NOW: 394 ret = mp2629_read_adc(charger, MP2629_INPUT_CURRENT, val); 395 break; 396 397 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 398 ret = mp2629_get_prop(charger, INPUT_VLIM, val); 399 break; 400 401 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 402 ret = mp2629_get_prop(charger, INPUT_ILIM, val); 403 break; 404 405 default: 406 return -EINVAL; 407 } 408 409 return ret; 410} 411 412static int mp2629_charger_usb_set_prop(struct power_supply *psy, 413 enum power_supply_property psp, 414 const union power_supply_propval *val) 415{ 416 struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent); 417 418 switch (psp) { 419 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 420 return mp2629_set_prop(charger, INPUT_VLIM, val); 421 422 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 423 return mp2629_set_prop(charger, INPUT_ILIM, val); 424 425 default: 426 return -EINVAL; 427 } 428} 429 430static int mp2629_charger_battery_prop_writeable(struct power_supply *psy, 431 enum power_supply_property psp) 432{ 433 return (psp == POWER_SUPPLY_PROP_PRECHARGE_CURRENT) || 434 (psp == POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT) || 435 (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) || 436 (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE); 437} 438 439static int mp2629_charger_usb_prop_writeable(struct power_supply *psy, 440 enum power_supply_property psp) 441{ 442 return (psp == POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT) || 443 (psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT); 444} 445 446static irqreturn_t mp2629_irq_handler(int irq, void *dev_id) 447{ 448 struct mp2629_charger *charger = dev_id; 449 unsigned int rval; 450 int ret; 451 452 mutex_lock(&charger->lock); 453 454 ret = regmap_read(charger->regmap, MP2629_REG_FAULT, &rval); 455 if (ret) 456 goto unlock; 457 458 if (rval) { 459 charger->fault = rval; 460 if (MP2629_FAULT_BATTERY & rval) 461 dev_err(charger->dev, "Battery fault OVP\n"); 462 else if (MP2629_FAULT_THERMAL & rval) 463 dev_err(charger->dev, "Thermal shutdown fault\n"); 464 else if (MP2629_FAULT_INPUT & rval) 465 dev_err(charger->dev, "no input or input OVP\n"); 466 else if (MP2629_FAULT_OTG & rval) 467 dev_err(charger->dev, "VIN overloaded\n"); 468 469 goto unlock; 470 } 471 472 ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval); 473 if (ret) 474 goto unlock; 475 476 if (rval & MP2629_INPUTSOURCE_CHANGE) 477 power_supply_changed(charger->usb); 478 else if (rval & MP2629_CHARGING_CHANGE) 479 power_supply_changed(charger->battery); 480 481unlock: 482 mutex_unlock(&charger->lock); 483 484 return IRQ_HANDLED; 485} 486 487static const struct power_supply_desc mp2629_usb_desc = { 488 .name = "mp2629_usb", 489 .type = POWER_SUPPLY_TYPE_USB, 490 .usb_types = mp2629_usb_types, 491 .num_usb_types = ARRAY_SIZE(mp2629_usb_types), 492 .properties = mp2629_charger_usb_props, 493 .num_properties = ARRAY_SIZE(mp2629_charger_usb_props), 494 .get_property = mp2629_charger_usb_get_prop, 495 .set_property = mp2629_charger_usb_set_prop, 496 .property_is_writeable = mp2629_charger_usb_prop_writeable, 497}; 498 499static const struct power_supply_desc mp2629_battery_desc = { 500 .name = "mp2629_battery", 501 .type = POWER_SUPPLY_TYPE_BATTERY, 502 .properties = mp2629_charger_bat_props, 503 .num_properties = ARRAY_SIZE(mp2629_charger_bat_props), 504 .get_property = mp2629_charger_battery_get_prop, 505 .set_property = mp2629_charger_battery_set_prop, 506 .property_is_writeable = mp2629_charger_battery_prop_writeable, 507}; 508 509static ssize_t batt_impedance_compensation_show(struct device *dev, 510 struct device_attribute *attr, 511 char *buf) 512{ 513 struct mp2629_charger *charger = dev_get_drvdata(dev->parent); 514 unsigned int rval; 515 int ret; 516 517 ret = regmap_read(charger->regmap, MP2629_REG_IMPEDANCE_COMP, &rval); 518 if (ret) 519 return ret; 520 521 rval = (rval >> 4) * 10; 522 return sysfs_emit(buf, "%d mohm\n", rval); 523} 524 525static ssize_t batt_impedance_compensation_store(struct device *dev, 526 struct device_attribute *attr, 527 const char *buf, 528 size_t count) 529{ 530 struct mp2629_charger *charger = dev_get_drvdata(dev->parent); 531 unsigned int val; 532 int ret; 533 534 ret = kstrtouint(buf, 10, &val); 535 if (ret) 536 return ret; 537 538 if (val > 140) 539 return -ERANGE; 540 541 /* multiples of 10 mohm so round off */ 542 val = val / 10; 543 ret = regmap_update_bits(charger->regmap, MP2629_REG_IMPEDANCE_COMP, 544 MP2629_MASK_IMPEDANCE, val << 4); 545 if (ret) 546 return ret; 547 548 return count; 549} 550 551static DEVICE_ATTR_RW(batt_impedance_compensation); 552 553static struct attribute *mp2629_charger_sysfs_attrs[] = { 554 &dev_attr_batt_impedance_compensation.attr, 555 NULL 556}; 557ATTRIBUTE_GROUPS(mp2629_charger_sysfs); 558 559static void mp2629_charger_disable(void *data) 560{ 561 struct mp2629_charger *charger = data; 562 563 regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL, 564 MP2629_MASK_CHARGE_CTRL, 0); 565} 566 567static int mp2629_charger_probe(struct platform_device *pdev) 568{ 569 struct device *dev = &pdev->dev; 570 struct mp2629_data *ddata = dev_get_drvdata(dev->parent); 571 struct mp2629_charger *charger; 572 struct power_supply_config psy_cfg = {}; 573 int ret, i, irq; 574 575 charger = devm_kzalloc(dev, sizeof(*charger), GFP_KERNEL); 576 if (!charger) 577 return -ENOMEM; 578 579 charger->regmap = ddata->regmap; 580 charger->dev = dev; 581 platform_set_drvdata(pdev, charger); 582 583 irq = platform_get_irq(to_platform_device(dev->parent), 0); 584 if (irq < 0) 585 return irq; 586 587 for (i = 0; i < MP2629_MAX_FIELD; i++) { 588 charger->regmap_fields[i] = devm_regmap_field_alloc(dev, 589 charger->regmap, mp2629_reg_fields[i]); 590 if (IS_ERR(charger->regmap_fields[i])) { 591 dev_err(dev, "regmap field alloc fail %d\n", i); 592 return PTR_ERR(charger->regmap_fields[i]); 593 } 594 } 595 596 for (i = 0; i < MP2629_ADC_CHAN_END; i++) { 597 charger->iiochan[i] = devm_iio_channel_get(dev, 598 adc_chan_name[i]); 599 if (IS_ERR(charger->iiochan[i])) { 600 dev_err(dev, "iio chan get %s err\n", adc_chan_name[i]); 601 return PTR_ERR(charger->iiochan[i]); 602 } 603 } 604 605 ret = devm_add_action_or_reset(dev, mp2629_charger_disable, charger); 606 if (ret) 607 return ret; 608 609 charger->usb = devm_power_supply_register(dev, &mp2629_usb_desc, NULL); 610 if (IS_ERR(charger->usb)) { 611 dev_err(dev, "power supply register usb failed\n"); 612 return PTR_ERR(charger->usb); 613 } 614 615 psy_cfg.drv_data = charger; 616 psy_cfg.attr_grp = mp2629_charger_sysfs_groups; 617 charger->battery = devm_power_supply_register(dev, 618 &mp2629_battery_desc, &psy_cfg); 619 if (IS_ERR(charger->battery)) { 620 dev_err(dev, "power supply register battery failed\n"); 621 return PTR_ERR(charger->battery); 622 } 623 624 ret = regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL, 625 MP2629_MASK_CHARGE_CTRL, BIT(4)); 626 if (ret) { 627 dev_err(dev, "enable charge fail: %d\n", ret); 628 return ret; 629 } 630 631 regmap_update_bits(charger->regmap, MP2629_REG_TIMER_CTRL, 632 MP2629_MASK_WDOG_CTRL, 0); 633 634 mutex_init(&charger->lock); 635 636 ret = devm_request_threaded_irq(dev, irq, NULL, mp2629_irq_handler, 637 IRQF_ONESHOT | IRQF_TRIGGER_RISING, 638 "mp2629-charger", charger); 639 if (ret) { 640 dev_err(dev, "failed to request gpio IRQ\n"); 641 return ret; 642 } 643 644 regmap_update_bits(charger->regmap, MP2629_REG_INTERRUPT, 645 GENMASK(6, 5), BIT(6) | BIT(5)); 646 647 return 0; 648} 649 650static const struct of_device_id mp2629_charger_of_match[] = { 651 { .compatible = "mps,mp2629_charger"}, 652 {} 653}; 654MODULE_DEVICE_TABLE(of, mp2629_charger_of_match); 655 656static struct platform_driver mp2629_charger_driver = { 657 .driver = { 658 .name = "mp2629_charger", 659 .of_match_table = mp2629_charger_of_match, 660 }, 661 .probe = mp2629_charger_probe, 662}; 663module_platform_driver(mp2629_charger_driver); 664 665MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>"); 666MODULE_DESCRIPTION("MP2629 Charger driver"); 667MODULE_LICENSE("GPL"); 668