1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Driver for UCS1002 Programmable USB Port Power Controller 4 * 5 * Copyright (C) 2019 Zodiac Inflight Innovations 6 */ 7#include <linux/bits.h> 8#include <linux/freezer.h> 9#include <linux/gpio/consumer.h> 10#include <linux/i2c.h> 11#include <linux/interrupt.h> 12#include <linux/kernel.h> 13#include <linux/kthread.h> 14#include <linux/device.h> 15#include <linux/module.h> 16#include <linux/of.h> 17#include <linux/of_irq.h> 18#include <linux/power_supply.h> 19#include <linux/regmap.h> 20#include <linux/regulator/driver.h> 21#include <linux/regulator/of_regulator.h> 22 23/* UCS1002 Registers */ 24#define UCS1002_REG_CURRENT_MEASUREMENT 0x00 25 26/* 27 * The Total Accumulated Charge registers store the total accumulated 28 * charge delivered from the VS source to a portable device. The total 29 * value is calculated using four registers, from 01h to 04h. The bit 30 * weighting of the registers is given in mA/hrs. 31 */ 32#define UCS1002_REG_TOTAL_ACC_CHARGE 0x01 33 34/* Other Status Register */ 35#define UCS1002_REG_OTHER_STATUS 0x0f 36# define F_ADET_PIN BIT(4) 37# define F_CHG_ACT BIT(3) 38 39/* Interrupt Status */ 40#define UCS1002_REG_INTERRUPT_STATUS 0x10 41# define F_ERR BIT(7) 42# define F_DISCHARGE_ERR BIT(6) 43# define F_RESET BIT(5) 44# define F_MIN_KEEP_OUT BIT(4) 45# define F_TSD BIT(3) 46# define F_OVER_VOLT BIT(2) 47# define F_BACK_VOLT BIT(1) 48# define F_OVER_ILIM BIT(0) 49 50/* Pin Status Register */ 51#define UCS1002_REG_PIN_STATUS 0x14 52# define UCS1002_PWR_STATE_MASK 0x03 53# define F_PWR_EN_PIN BIT(6) 54# define F_M2_PIN BIT(5) 55# define F_M1_PIN BIT(4) 56# define F_EM_EN_PIN BIT(3) 57# define F_SEL_PIN BIT(2) 58# define F_ACTIVE_MODE_MASK GENMASK(5, 3) 59# define F_ACTIVE_MODE_PASSTHROUGH F_M2_PIN 60# define F_ACTIVE_MODE_DEDICATED F_EM_EN_PIN 61# define F_ACTIVE_MODE_BC12_DCP (F_M2_PIN | F_EM_EN_PIN) 62# define F_ACTIVE_MODE_BC12_SDP F_M1_PIN 63# define F_ACTIVE_MODE_BC12_CDP (F_M1_PIN | F_M2_PIN | F_EM_EN_PIN) 64 65/* General Configuration Register */ 66#define UCS1002_REG_GENERAL_CFG 0x15 67# define F_RATION_EN BIT(3) 68 69/* Emulation Configuration Register */ 70#define UCS1002_REG_EMU_CFG 0x16 71 72/* Switch Configuration Register */ 73#define UCS1002_REG_SWITCH_CFG 0x17 74# define F_PIN_IGNORE BIT(7) 75# define F_EM_EN_SET BIT(5) 76# define F_M2_SET BIT(4) 77# define F_M1_SET BIT(3) 78# define F_S0_SET BIT(2) 79# define F_PWR_EN_SET BIT(1) 80# define F_LATCH_SET BIT(0) 81# define V_SET_ACTIVE_MODE_MASK GENMASK(5, 3) 82# define V_SET_ACTIVE_MODE_PASSTHROUGH F_M2_SET 83# define V_SET_ACTIVE_MODE_DEDICATED F_EM_EN_SET 84# define V_SET_ACTIVE_MODE_BC12_DCP (F_M2_SET | F_EM_EN_SET) 85# define V_SET_ACTIVE_MODE_BC12_SDP F_M1_SET 86# define V_SET_ACTIVE_MODE_BC12_CDP (F_M1_SET | F_M2_SET | F_EM_EN_SET) 87 88/* Current Limit Register */ 89#define UCS1002_REG_ILIMIT 0x19 90# define UCS1002_ILIM_SW_MASK GENMASK(3, 0) 91 92/* Product ID */ 93#define UCS1002_REG_PRODUCT_ID 0xfd 94# define UCS1002_PRODUCT_ID 0x4e 95 96/* Manufacture name */ 97#define UCS1002_MANUFACTURER "SMSC" 98 99struct ucs1002_info { 100 struct power_supply *charger; 101 struct i2c_client *client; 102 struct regmap *regmap; 103 struct regulator_desc *regulator_descriptor; 104 struct regulator_dev *rdev; 105 bool present; 106 bool output_disable; 107 struct delayed_work health_poll; 108 int health; 109 110}; 111 112static enum power_supply_property ucs1002_props[] = { 113 POWER_SUPPLY_PROP_ONLINE, 114 POWER_SUPPLY_PROP_CHARGE_NOW, 115 POWER_SUPPLY_PROP_CURRENT_NOW, 116 POWER_SUPPLY_PROP_CURRENT_MAX, 117 POWER_SUPPLY_PROP_PRESENT, /* the presence of PED */ 118 POWER_SUPPLY_PROP_MANUFACTURER, 119 POWER_SUPPLY_PROP_USB_TYPE, 120 POWER_SUPPLY_PROP_HEALTH, 121}; 122 123static int ucs1002_get_online(struct ucs1002_info *info, 124 union power_supply_propval *val) 125{ 126 unsigned int reg; 127 int ret; 128 129 ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®); 130 if (ret) 131 return ret; 132 133 val->intval = !!(reg & F_CHG_ACT); 134 135 return 0; 136} 137 138static int ucs1002_get_charge(struct ucs1002_info *info, 139 union power_supply_propval *val) 140{ 141 /* 142 * To fit within 32 bits some values are rounded (uA/h) 143 * 144 * For Total Accumulated Charge Middle Low Byte register, addr 145 * 03h, byte 2 146 * 147 * B0: 0.01084 mA/h rounded to 11 uA/h 148 * B1: 0.02169 mA/h rounded to 22 uA/h 149 * B2: 0.04340 mA/h rounded to 43 uA/h 150 * B3: 0.08676 mA/h rounded to 87 uA/h 151 * B4: 0.17350 mA/h rounded to 173 uÁ/h 152 * 153 * For Total Accumulated Charge Low Byte register, addr 04h, 154 * byte 3 155 * 156 * B6: 0.00271 mA/h rounded to 3 uA/h 157 * B7: 0.005422 mA/h rounded to 5 uA/h 158 */ 159 static const int bit_weights_uAh[BITS_PER_TYPE(u32)] = { 160 /* 161 * Bit corresponding to low byte (offset 0x04) 162 * B0 B1 B2 B3 B4 B5 B6 B7 163 */ 164 0, 0, 0, 0, 0, 0, 3, 5, 165 /* 166 * Bit corresponding to middle low byte (offset 0x03) 167 * B0 B1 B2 B3 B4 B5 B6 B7 168 */ 169 11, 22, 43, 87, 173, 347, 694, 1388, 170 /* 171 * Bit corresponding to middle high byte (offset 0x02) 172 * B0 B1 B2 B3 B4 B5 B6 B7 173 */ 174 2776, 5552, 11105, 22210, 44420, 88840, 177700, 355400, 175 /* 176 * Bit corresponding to high byte (offset 0x01) 177 * B0 B1 B2 B3 B4 B5 B6 B7 178 */ 179 710700, 1421000, 2843000, 5685000, 11371000, 22742000, 180 45484000, 90968000, 181 }; 182 unsigned long total_acc_charger; 183 unsigned int reg; 184 int i, ret; 185 186 ret = regmap_bulk_read(info->regmap, UCS1002_REG_TOTAL_ACC_CHARGE, 187 ®, sizeof(u32)); 188 if (ret) 189 return ret; 190 191 total_acc_charger = be32_to_cpu(reg); /* BE as per offsets above */ 192 val->intval = 0; 193 194 for_each_set_bit(i, &total_acc_charger, ARRAY_SIZE(bit_weights_uAh)) 195 val->intval += bit_weights_uAh[i]; 196 197 return 0; 198} 199 200static int ucs1002_get_current(struct ucs1002_info *info, 201 union power_supply_propval *val) 202{ 203 /* 204 * The Current Measurement register stores the measured 205 * current value delivered to the portable device. The range 206 * is from 9.76 mA to 2.5 A. 207 */ 208 static const int bit_weights_uA[BITS_PER_TYPE(u8)] = { 209 9760, 19500, 39000, 78100, 156200, 312300, 624600, 1249300, 210 }; 211 unsigned long current_measurement; 212 unsigned int reg; 213 int i, ret; 214 215 ret = regmap_read(info->regmap, UCS1002_REG_CURRENT_MEASUREMENT, ®); 216 if (ret) 217 return ret; 218 219 current_measurement = reg; 220 val->intval = 0; 221 222 for_each_set_bit(i, ¤t_measurement, ARRAY_SIZE(bit_weights_uA)) 223 val->intval += bit_weights_uA[i]; 224 225 return 0; 226} 227 228/* 229 * The Current Limit register stores the maximum current used by the 230 * port switch. The range is from 500mA to 2.5 A. 231 */ 232static const u32 ucs1002_current_limit_uA[] = { 233 500000, 900000, 1000000, 1200000, 1500000, 1800000, 2000000, 2500000, 234}; 235 236static int ucs1002_get_max_current(struct ucs1002_info *info, 237 union power_supply_propval *val) 238{ 239 unsigned int reg; 240 int ret; 241 242 if (info->output_disable) { 243 val->intval = 0; 244 return 0; 245 } 246 247 ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®); 248 if (ret) 249 return ret; 250 251 val->intval = ucs1002_current_limit_uA[reg & UCS1002_ILIM_SW_MASK]; 252 253 return 0; 254} 255 256static int ucs1002_set_max_current(struct ucs1002_info *info, u32 val) 257{ 258 unsigned int reg; 259 int ret, idx; 260 261 if (val == 0) { 262 info->output_disable = true; 263 regulator_disable_regmap(info->rdev); 264 return 0; 265 } 266 267 for (idx = 0; idx < ARRAY_SIZE(ucs1002_current_limit_uA); idx++) { 268 if (val == ucs1002_current_limit_uA[idx]) 269 break; 270 } 271 272 if (idx == ARRAY_SIZE(ucs1002_current_limit_uA)) 273 return -EINVAL; 274 275 ret = regmap_write(info->regmap, UCS1002_REG_ILIMIT, idx); 276 if (ret) 277 return ret; 278 /* 279 * Any current limit setting exceeding the one set via ILIM 280 * pin will be rejected, so we read out freshly changed limit 281 * to make sure that it took effect. 282 */ 283 ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®); 284 if (ret) 285 return ret; 286 287 if (reg != idx) 288 return -EINVAL; 289 290 info->output_disable = false; 291 292 if (info->rdev && info->rdev->use_count && 293 !regulator_is_enabled_regmap(info->rdev)) 294 regulator_enable_regmap(info->rdev); 295 296 return 0; 297} 298 299static enum power_supply_usb_type ucs1002_usb_types[] = { 300 POWER_SUPPLY_USB_TYPE_PD, 301 POWER_SUPPLY_USB_TYPE_SDP, 302 POWER_SUPPLY_USB_TYPE_DCP, 303 POWER_SUPPLY_USB_TYPE_CDP, 304 POWER_SUPPLY_USB_TYPE_UNKNOWN, 305}; 306 307static int ucs1002_set_usb_type(struct ucs1002_info *info, int val) 308{ 309 unsigned int mode; 310 311 if (val < 0 || val >= ARRAY_SIZE(ucs1002_usb_types)) 312 return -EINVAL; 313 314 switch (ucs1002_usb_types[val]) { 315 case POWER_SUPPLY_USB_TYPE_PD: 316 mode = V_SET_ACTIVE_MODE_DEDICATED; 317 break; 318 case POWER_SUPPLY_USB_TYPE_SDP: 319 mode = V_SET_ACTIVE_MODE_BC12_SDP; 320 break; 321 case POWER_SUPPLY_USB_TYPE_DCP: 322 mode = V_SET_ACTIVE_MODE_BC12_DCP; 323 break; 324 case POWER_SUPPLY_USB_TYPE_CDP: 325 mode = V_SET_ACTIVE_MODE_BC12_CDP; 326 break; 327 default: 328 return -EINVAL; 329 } 330 331 return regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG, 332 V_SET_ACTIVE_MODE_MASK, mode); 333} 334 335static int ucs1002_get_usb_type(struct ucs1002_info *info, 336 union power_supply_propval *val) 337{ 338 enum power_supply_usb_type type; 339 unsigned int reg; 340 int ret; 341 342 ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®); 343 if (ret) 344 return ret; 345 346 switch (reg & F_ACTIVE_MODE_MASK) { 347 default: 348 type = POWER_SUPPLY_USB_TYPE_UNKNOWN; 349 break; 350 case F_ACTIVE_MODE_DEDICATED: 351 type = POWER_SUPPLY_USB_TYPE_PD; 352 break; 353 case F_ACTIVE_MODE_BC12_SDP: 354 type = POWER_SUPPLY_USB_TYPE_SDP; 355 break; 356 case F_ACTIVE_MODE_BC12_DCP: 357 type = POWER_SUPPLY_USB_TYPE_DCP; 358 break; 359 case F_ACTIVE_MODE_BC12_CDP: 360 type = POWER_SUPPLY_USB_TYPE_CDP; 361 break; 362 } 363 364 val->intval = type; 365 366 return 0; 367} 368 369static int ucs1002_get_property(struct power_supply *psy, 370 enum power_supply_property psp, 371 union power_supply_propval *val) 372{ 373 struct ucs1002_info *info = power_supply_get_drvdata(psy); 374 375 switch (psp) { 376 case POWER_SUPPLY_PROP_ONLINE: 377 return ucs1002_get_online(info, val); 378 case POWER_SUPPLY_PROP_CHARGE_NOW: 379 return ucs1002_get_charge(info, val); 380 case POWER_SUPPLY_PROP_CURRENT_NOW: 381 return ucs1002_get_current(info, val); 382 case POWER_SUPPLY_PROP_CURRENT_MAX: 383 return ucs1002_get_max_current(info, val); 384 case POWER_SUPPLY_PROP_USB_TYPE: 385 return ucs1002_get_usb_type(info, val); 386 case POWER_SUPPLY_PROP_HEALTH: 387 val->intval = info->health; 388 return 0; 389 case POWER_SUPPLY_PROP_PRESENT: 390 val->intval = info->present; 391 return 0; 392 case POWER_SUPPLY_PROP_MANUFACTURER: 393 val->strval = UCS1002_MANUFACTURER; 394 return 0; 395 default: 396 return -EINVAL; 397 } 398} 399 400static int ucs1002_set_property(struct power_supply *psy, 401 enum power_supply_property psp, 402 const union power_supply_propval *val) 403{ 404 struct ucs1002_info *info = power_supply_get_drvdata(psy); 405 406 switch (psp) { 407 case POWER_SUPPLY_PROP_CURRENT_MAX: 408 return ucs1002_set_max_current(info, val->intval); 409 case POWER_SUPPLY_PROP_USB_TYPE: 410 return ucs1002_set_usb_type(info, val->intval); 411 default: 412 return -EINVAL; 413 } 414} 415 416static int ucs1002_property_is_writeable(struct power_supply *psy, 417 enum power_supply_property psp) 418{ 419 switch (psp) { 420 case POWER_SUPPLY_PROP_CURRENT_MAX: 421 case POWER_SUPPLY_PROP_USB_TYPE: 422 return true; 423 default: 424 return false; 425 } 426} 427 428static const struct power_supply_desc ucs1002_charger_desc = { 429 .name = "ucs1002", 430 .type = POWER_SUPPLY_TYPE_USB, 431 .usb_types = ucs1002_usb_types, 432 .num_usb_types = ARRAY_SIZE(ucs1002_usb_types), 433 .get_property = ucs1002_get_property, 434 .set_property = ucs1002_set_property, 435 .property_is_writeable = ucs1002_property_is_writeable, 436 .properties = ucs1002_props, 437 .num_properties = ARRAY_SIZE(ucs1002_props), 438}; 439 440static void ucs1002_health_poll(struct work_struct *work) 441{ 442 struct ucs1002_info *info = container_of(work, struct ucs1002_info, 443 health_poll.work); 444 int ret; 445 u32 reg; 446 447 ret = regmap_read(info->regmap, UCS1002_REG_INTERRUPT_STATUS, ®); 448 if (ret) 449 return; 450 451 /* bad health and no status change, just schedule us again in a while */ 452 if ((reg & F_ERR) && info->health != POWER_SUPPLY_HEALTH_GOOD) { 453 schedule_delayed_work(&info->health_poll, 454 msecs_to_jiffies(2000)); 455 return; 456 } 457 458 if (reg & F_TSD) 459 info->health = POWER_SUPPLY_HEALTH_OVERHEAT; 460 else if (reg & (F_OVER_VOLT | F_BACK_VOLT)) 461 info->health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; 462 else if (reg & F_OVER_ILIM) 463 info->health = POWER_SUPPLY_HEALTH_OVERCURRENT; 464 else if (reg & (F_DISCHARGE_ERR | F_MIN_KEEP_OUT)) 465 info->health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; 466 else 467 info->health = POWER_SUPPLY_HEALTH_GOOD; 468 469 sysfs_notify(&info->charger->dev.kobj, NULL, "health"); 470} 471 472static irqreturn_t ucs1002_charger_irq(int irq, void *data) 473{ 474 int ret, regval; 475 bool present; 476 struct ucs1002_info *info = data; 477 478 present = info->present; 479 480 ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®val); 481 if (ret) 482 return IRQ_HANDLED; 483 484 /* update attached status */ 485 info->present = regval & F_ADET_PIN; 486 487 /* notify the change */ 488 if (present != info->present) 489 power_supply_changed(info->charger); 490 491 return IRQ_HANDLED; 492} 493 494static irqreturn_t ucs1002_alert_irq(int irq, void *data) 495{ 496 struct ucs1002_info *info = data; 497 498 mod_delayed_work(system_wq, &info->health_poll, 0); 499 500 return IRQ_HANDLED; 501} 502 503static int ucs1002_regulator_enable(struct regulator_dev *rdev) 504{ 505 struct ucs1002_info *info = rdev_get_drvdata(rdev); 506 507 /* 508 * If the output is disabled due to 0 maximum current, just pretend the 509 * enable did work. The regulator will be enabled as soon as we get a 510 * a non-zero maximum current budget. 511 */ 512 if (info->output_disable) 513 return 0; 514 515 return regulator_enable_regmap(rdev); 516} 517 518static const struct regulator_ops ucs1002_regulator_ops = { 519 .is_enabled = regulator_is_enabled_regmap, 520 .enable = ucs1002_regulator_enable, 521 .disable = regulator_disable_regmap, 522}; 523 524static const struct regulator_desc ucs1002_regulator_descriptor = { 525 .name = "ucs1002-vbus", 526 .ops = &ucs1002_regulator_ops, 527 .type = REGULATOR_VOLTAGE, 528 .owner = THIS_MODULE, 529 .enable_reg = UCS1002_REG_SWITCH_CFG, 530 .enable_mask = F_PWR_EN_SET, 531 .enable_val = F_PWR_EN_SET, 532 .fixed_uV = 5000000, 533 .n_voltages = 1, 534}; 535 536static int ucs1002_probe(struct i2c_client *client, 537 const struct i2c_device_id *dev_id) 538{ 539 struct device *dev = &client->dev; 540 struct power_supply_config charger_config = {}; 541 const struct regmap_config regmap_config = { 542 .reg_bits = 8, 543 .val_bits = 8, 544 }; 545 struct regulator_config regulator_config = {}; 546 int irq_a_det, irq_alert, ret; 547 struct ucs1002_info *info; 548 unsigned int regval; 549 550 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); 551 if (!info) 552 return -ENOMEM; 553 554 info->regmap = devm_regmap_init_i2c(client, ®map_config); 555 ret = PTR_ERR_OR_ZERO(info->regmap); 556 if (ret) { 557 dev_err(dev, "Regmap initialization failed: %d\n", ret); 558 return ret; 559 } 560 561 info->client = client; 562 563 irq_a_det = of_irq_get_byname(dev->of_node, "a_det"); 564 irq_alert = of_irq_get_byname(dev->of_node, "alert"); 565 566 charger_config.of_node = dev->of_node; 567 charger_config.drv_data = info; 568 569 ret = regmap_read(info->regmap, UCS1002_REG_PRODUCT_ID, ®val); 570 if (ret) { 571 dev_err(dev, "Failed to read product ID: %d\n", ret); 572 return ret; 573 } 574 575 if (regval != UCS1002_PRODUCT_ID) { 576 dev_err(dev, 577 "Product ID does not match (0x%02x != 0x%02x)\n", 578 regval, UCS1002_PRODUCT_ID); 579 return -ENODEV; 580 } 581 582 /* Enable charge rationing by default */ 583 ret = regmap_update_bits(info->regmap, UCS1002_REG_GENERAL_CFG, 584 F_RATION_EN, F_RATION_EN); 585 if (ret) { 586 dev_err(dev, "Failed to read general config: %d\n", ret); 587 return ret; 588 } 589 590 /* 591 * Ignore the M1, M2, PWR_EN, and EM_EN pin states. Set active 592 * mode selection to BC1.2 CDP. 593 */ 594 ret = regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG, 595 V_SET_ACTIVE_MODE_MASK | F_PIN_IGNORE, 596 V_SET_ACTIVE_MODE_BC12_CDP | F_PIN_IGNORE); 597 if (ret) { 598 dev_err(dev, "Failed to configure default mode: %d\n", ret); 599 return ret; 600 } 601 /* 602 * Be safe and set initial current limit to 500mA 603 */ 604 ret = ucs1002_set_max_current(info, 500000); 605 if (ret) { 606 dev_err(dev, "Failed to set max current default: %d\n", ret); 607 return ret; 608 } 609 610 info->charger = devm_power_supply_register(dev, &ucs1002_charger_desc, 611 &charger_config); 612 ret = PTR_ERR_OR_ZERO(info->charger); 613 if (ret) { 614 dev_err(dev, "Failed to register power supply: %d\n", ret); 615 return ret; 616 } 617 618 ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®val); 619 if (ret) { 620 dev_err(dev, "Failed to read pin status: %d\n", ret); 621 return ret; 622 } 623 624 info->regulator_descriptor = 625 devm_kmemdup(dev, &ucs1002_regulator_descriptor, 626 sizeof(ucs1002_regulator_descriptor), 627 GFP_KERNEL); 628 if (!info->regulator_descriptor) 629 return -ENOMEM; 630 631 info->regulator_descriptor->enable_is_inverted = !(regval & F_SEL_PIN); 632 633 regulator_config.dev = dev; 634 regulator_config.of_node = dev->of_node; 635 regulator_config.regmap = info->regmap; 636 regulator_config.driver_data = info; 637 638 info->rdev = devm_regulator_register(dev, info->regulator_descriptor, 639 ®ulator_config); 640 ret = PTR_ERR_OR_ZERO(info->rdev); 641 if (ret) { 642 dev_err(dev, "Failed to register VBUS regulator: %d\n", ret); 643 return ret; 644 } 645 646 info->health = POWER_SUPPLY_HEALTH_GOOD; 647 INIT_DELAYED_WORK(&info->health_poll, ucs1002_health_poll); 648 649 if (irq_a_det > 0) { 650 ret = devm_request_threaded_irq(dev, irq_a_det, NULL, 651 ucs1002_charger_irq, 652 IRQF_ONESHOT, 653 "ucs1002-a_det", info); 654 if (ret) { 655 dev_err(dev, "Failed to request A_DET threaded irq: %d\n", 656 ret); 657 return ret; 658 } 659 } 660 661 if (irq_alert > 0) { 662 ret = devm_request_irq(dev, irq_alert, ucs1002_alert_irq, 663 0,"ucs1002-alert", info); 664 if (ret) { 665 dev_err(dev, "Failed to request ALERT threaded irq: %d\n", 666 ret); 667 return ret; 668 } 669 } 670 671 return 0; 672} 673 674static const struct of_device_id ucs1002_of_match[] = { 675 { .compatible = "microchip,ucs1002", }, 676 { /* sentinel */ }, 677}; 678MODULE_DEVICE_TABLE(of, ucs1002_of_match); 679 680static struct i2c_driver ucs1002_driver = { 681 .driver = { 682 .name = "ucs1002", 683 .of_match_table = ucs1002_of_match, 684 }, 685 .probe = ucs1002_probe, 686}; 687module_i2c_driver(ucs1002_driver); 688 689MODULE_DESCRIPTION("Microchip UCS1002 Programmable USB Port Power Controller"); 690MODULE_AUTHOR("Enric Balletbo Serra <enric.balletbo@collabora.com>"); 691MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); 692MODULE_LICENSE("GPL"); 693