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1// SPDX-License-Identifier: GPL-2.0+2//3// extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC4//5// Copyright (C) 2012 Samsung Electronics6// Donggeun Kim <dg77.kim@samsung.com>7 8#include <linux/devm-helpers.h>9#include <linux/kernel.h>10#include <linux/module.h>11#include <linux/i2c.h>12#include <linux/slab.h>13#include <linux/interrupt.h>14#include <linux/err.h>15#include <linux/platform_device.h>16#include <linux/kobject.h>17#include <linux/mfd/max8997.h>18#include <linux/mfd/max8997-private.h>19#include <linux/extcon-provider.h>20#include <linux/irqdomain.h>21 22#define DEV_NAME "max8997-muic"23#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */24 25enum max8997_muic_adc_debounce_time {26 ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */27 ADC_DEBOUNCE_TIME_10MS, /* 10ms */28 ADC_DEBOUNCE_TIME_25MS, /* 25ms */29 ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */30};31 32struct max8997_muic_irq {33 unsigned int irq;34 const char *name;35 unsigned int virq;36};37 38static struct max8997_muic_irq muic_irqs[] = {39 { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" },40 { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" },41 { MAX8997_MUICIRQ_ADC, "muic-ADC" },42 { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" },43 { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" },44 { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" },45 { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" },46 { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" },47 { MAX8997_MUICIRQ_OVP, "muic-OVP" },48 { MAX8997_PMICIRQ_CHGINS, "pmic-CHGINS" },49 { MAX8997_PMICIRQ_CHGRM, "pmic-CHGRM" },50};51 52/* Define supported cable type */53enum max8997_muic_acc_type {54 MAX8997_MUIC_ADC_GROUND = 0x0,55 MAX8997_MUIC_ADC_MHL, /* MHL*/56 MAX8997_MUIC_ADC_REMOTE_S1_BUTTON,57 MAX8997_MUIC_ADC_REMOTE_S2_BUTTON,58 MAX8997_MUIC_ADC_REMOTE_S3_BUTTON,59 MAX8997_MUIC_ADC_REMOTE_S4_BUTTON,60 MAX8997_MUIC_ADC_REMOTE_S5_BUTTON,61 MAX8997_MUIC_ADC_REMOTE_S6_BUTTON,62 MAX8997_MUIC_ADC_REMOTE_S7_BUTTON,63 MAX8997_MUIC_ADC_REMOTE_S8_BUTTON,64 MAX8997_MUIC_ADC_REMOTE_S9_BUTTON,65 MAX8997_MUIC_ADC_REMOTE_S10_BUTTON,66 MAX8997_MUIC_ADC_REMOTE_S11_BUTTON,67 MAX8997_MUIC_ADC_REMOTE_S12_BUTTON,68 MAX8997_MUIC_ADC_RESERVED_ACC_1,69 MAX8997_MUIC_ADC_RESERVED_ACC_2,70 MAX8997_MUIC_ADC_RESERVED_ACC_3,71 MAX8997_MUIC_ADC_RESERVED_ACC_4,72 MAX8997_MUIC_ADC_RESERVED_ACC_5,73 MAX8997_MUIC_ADC_CEA936_AUDIO,74 MAX8997_MUIC_ADC_PHONE_POWERED_DEV,75 MAX8997_MUIC_ADC_TTY_CONVERTER,76 MAX8997_MUIC_ADC_UART_CABLE,77 MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG,78 MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */79 MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */80 MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */81 MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG,82 MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */83 MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */84 MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE,85 MAX8997_MUIC_ADC_OPEN, /* OPEN */86};87 88enum max8997_muic_cable_group {89 MAX8997_CABLE_GROUP_ADC = 0,90 MAX8997_CABLE_GROUP_ADC_GND,91 MAX8997_CABLE_GROUP_CHG,92 MAX8997_CABLE_GROUP_VBVOLT,93};94 95enum max8997_muic_usb_type {96 MAX8997_USB_HOST,97 MAX8997_USB_DEVICE,98};99 100enum max8997_muic_charger_type {101 MAX8997_CHARGER_TYPE_NONE = 0,102 MAX8997_CHARGER_TYPE_USB,103 MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT,104 MAX8997_CHARGER_TYPE_DEDICATED_CHG,105 MAX8997_CHARGER_TYPE_500MA,106 MAX8997_CHARGER_TYPE_1A,107 MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7,108};109 110struct max8997_muic_info {111 struct device *dev;112 struct i2c_client *muic;113 struct extcon_dev *edev;114 int prev_cable_type;115 int prev_chg_type;116 u8 status[2];117 118 int irq;119 struct work_struct irq_work;120 struct mutex mutex;121 122 struct max8997_muic_platform_data *muic_pdata;123 enum max8997_muic_charger_type pre_charger_type;124 125 /*126 * Use delayed workqueue to detect cable state and then127 * notify cable state to notifiee/platform through uevent.128 * After completing the booting of platform, the extcon provider129 * driver should notify cable state to upper layer.130 */131 struct delayed_work wq_detcable;132 133 /*134 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB135 * h/w path of COMP2/COMN1 on CONTROL1 register.136 */137 int path_usb;138 int path_uart;139};140 141static const unsigned int max8997_extcon_cable[] = {142 EXTCON_USB,143 EXTCON_USB_HOST,144 EXTCON_CHG_USB_SDP,145 EXTCON_CHG_USB_DCP,146 EXTCON_CHG_USB_FAST,147 EXTCON_CHG_USB_SLOW,148 EXTCON_CHG_USB_CDP,149 EXTCON_DISP_MHL,150 EXTCON_DOCK,151 EXTCON_JIG,152 EXTCON_NONE,153};154 155/*156 * max8997_muic_set_debounce_time - Set the debounce time of ADC157 * @info: the instance including private data of max8997 MUIC158 * @time: the debounce time of ADC159 */160static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,161 enum max8997_muic_adc_debounce_time time)162{163 int ret;164 165 switch (time) {166 case ADC_DEBOUNCE_TIME_0_5MS:167 case ADC_DEBOUNCE_TIME_10MS:168 case ADC_DEBOUNCE_TIME_25MS:169 case ADC_DEBOUNCE_TIME_38_62MS:170 ret = max8997_update_reg(info->muic,171 MAX8997_MUIC_REG_CONTROL3,172 time << CONTROL3_ADCDBSET_SHIFT,173 CONTROL3_ADCDBSET_MASK);174 if (ret) {175 dev_err(info->dev, "failed to set ADC debounce time\n");176 return ret;177 }178 break;179 default:180 dev_err(info->dev, "invalid ADC debounce time\n");181 return -EINVAL;182 }183 184 return 0;185};186 187/*188 * max8997_muic_set_path - Set hardware line according to attached cable189 * @info: the instance including private data of max8997 MUIC190 * @value: the path according to attached cable191 * @attached: the state of cable (true:attached, false:detached)192 *193 * The max8997 MUIC device share outside H/W line among a varity of cables,194 * so this function set internal path of H/W line according to the type of195 * attached cable.196 */197static int max8997_muic_set_path(struct max8997_muic_info *info,198 u8 val, bool attached)199{200 int ret;201 u8 ctrl1, ctrl2 = 0;202 203 if (attached)204 ctrl1 = val;205 else206 ctrl1 = CONTROL1_SW_OPEN;207 208 ret = max8997_update_reg(info->muic,209 MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);210 if (ret < 0) {211 dev_err(info->dev, "failed to update MUIC register\n");212 return ret;213 }214 215 if (attached)216 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */217 else218 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */219 220 ret = max8997_update_reg(info->muic,221 MAX8997_MUIC_REG_CONTROL2, ctrl2,222 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);223 if (ret < 0) {224 dev_err(info->dev, "failed to update MUIC register\n");225 return ret;226 }227 228 dev_info(info->dev,229 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",230 ctrl1, ctrl2, attached ? "attached" : "detached");231 232 return 0;233}234 235/*236 * max8997_muic_get_cable_type - Return cable type and check cable state237 * @info: the instance including private data of max8997 MUIC238 * @group: the path according to attached cable239 * @attached: store cable state and return240 *241 * This function check the cable state either attached or detached,242 * and then divide precise type of cable according to cable group.243 * - MAX8997_CABLE_GROUP_ADC244 * - MAX8997_CABLE_GROUP_CHG245 */246static int max8997_muic_get_cable_type(struct max8997_muic_info *info,247 enum max8997_muic_cable_group group, bool *attached)248{249 int cable_type = 0;250 int adc;251 int chg_type;252 253 switch (group) {254 case MAX8997_CABLE_GROUP_ADC:255 /*256 * Read ADC value to check cable type and decide cable state257 * according to cable type258 */259 adc = info->status[0] & STATUS1_ADC_MASK;260 adc >>= STATUS1_ADC_SHIFT;261 262 /*263 * Check current cable state/cable type and store cable type264 * (info->prev_cable_type) for handling cable when cable is265 * detached.266 */267 if (adc == MAX8997_MUIC_ADC_OPEN) {268 *attached = false;269 270 cable_type = info->prev_cable_type;271 info->prev_cable_type = MAX8997_MUIC_ADC_OPEN;272 } else {273 *attached = true;274 275 cable_type = info->prev_cable_type = adc;276 }277 break;278 case MAX8997_CABLE_GROUP_CHG:279 /*280 * Read charger type to check cable type and decide cable state281 * according to type of charger cable.282 */283 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;284 chg_type >>= STATUS2_CHGTYP_SHIFT;285 286 if (chg_type == MAX8997_CHARGER_TYPE_NONE) {287 *attached = false;288 289 cable_type = info->prev_chg_type;290 info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE;291 } else {292 *attached = true;293 294 /*295 * Check current cable state/cable type and store cable296 * type(info->prev_chg_type) for handling cable when297 * charger cable is detached.298 */299 cable_type = info->prev_chg_type = chg_type;300 }301 302 break;303 default:304 dev_err(info->dev, "Unknown cable group (%d)\n", group);305 cable_type = -EINVAL;306 break;307 }308 309 return cable_type;310}311 312static int max8997_muic_handle_usb(struct max8997_muic_info *info,313 enum max8997_muic_usb_type usb_type, bool attached)314{315 int ret = 0;316 317 ret = max8997_muic_set_path(info, info->path_usb, attached);318 if (ret < 0) {319 dev_err(info->dev, "failed to update muic register\n");320 return ret;321 }322 323 switch (usb_type) {324 case MAX8997_USB_HOST:325 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);326 break;327 case MAX8997_USB_DEVICE:328 extcon_set_state_sync(info->edev, EXTCON_USB, attached);329 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,330 attached);331 break;332 default:333 dev_err(info->dev, "failed to detect %s usb cable\n",334 attached ? "attached" : "detached");335 return -EINVAL;336 }337 338 return 0;339}340 341static int max8997_muic_handle_dock(struct max8997_muic_info *info,342 int cable_type, bool attached)343{344 int ret = 0;345 346 ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);347 if (ret) {348 dev_err(info->dev, "failed to update muic register\n");349 return ret;350 }351 352 switch (cable_type) {353 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:354 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:355 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);356 break;357 default:358 dev_err(info->dev, "failed to detect %s dock device\n",359 attached ? "attached" : "detached");360 return -EINVAL;361 }362 363 return 0;364}365 366static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,367 bool attached)368{369 int ret = 0;370 371 /* switch to UART */372 ret = max8997_muic_set_path(info, info->path_uart, attached);373 if (ret) {374 dev_err(info->dev, "failed to update muic register\n");375 return ret;376 }377 378 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);379 380 return 0;381}382 383static int max8997_muic_adc_handler(struct max8997_muic_info *info)384{385 int cable_type;386 bool attached;387 int ret = 0;388 389 /* Check cable state which is either detached or attached */390 cable_type = max8997_muic_get_cable_type(info,391 MAX8997_CABLE_GROUP_ADC, &attached);392 393 switch (cable_type) {394 case MAX8997_MUIC_ADC_GROUND:395 ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached);396 if (ret < 0)397 return ret;398 break;399 case MAX8997_MUIC_ADC_MHL:400 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);401 break;402 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF:403 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON:404 ret = max8997_muic_handle_usb(info,405 MAX8997_USB_DEVICE, attached);406 if (ret < 0)407 return ret;408 break;409 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:410 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:411 ret = max8997_muic_handle_dock(info, cable_type, attached);412 if (ret < 0)413 return ret;414 break;415 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF:416 ret = max8997_muic_handle_jig_uart(info, attached);417 break;418 case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON:419 case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON:420 case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON:421 case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON:422 case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON:423 case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON:424 case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON:425 case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON:426 case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON:427 case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON:428 case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON:429 case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON:430 case MAX8997_MUIC_ADC_RESERVED_ACC_1:431 case MAX8997_MUIC_ADC_RESERVED_ACC_2:432 case MAX8997_MUIC_ADC_RESERVED_ACC_3:433 case MAX8997_MUIC_ADC_RESERVED_ACC_4:434 case MAX8997_MUIC_ADC_RESERVED_ACC_5:435 case MAX8997_MUIC_ADC_CEA936_AUDIO:436 case MAX8997_MUIC_ADC_PHONE_POWERED_DEV:437 case MAX8997_MUIC_ADC_TTY_CONVERTER:438 case MAX8997_MUIC_ADC_UART_CABLE:439 case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG:440 case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG:441 case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE:442 /*443 * This cable isn't used in general case if it is specially444 * needed to detect additional cable, should implement445 * proper operation when this cable is attached/detached.446 */447 dev_info(info->dev,448 "cable is %s but it isn't used (type:0x%x)\n",449 attached ? "attached" : "detached", cable_type);450 return -EAGAIN;451 default:452 dev_err(info->dev,453 "failed to detect %s unknown cable (type:0x%x)\n",454 attached ? "attached" : "detached", cable_type);455 return -EINVAL;456 }457 458 return 0;459}460 461static int max8997_muic_chg_handler(struct max8997_muic_info *info)462{463 int chg_type;464 bool attached;465 int adc;466 467 chg_type = max8997_muic_get_cable_type(info,468 MAX8997_CABLE_GROUP_CHG, &attached);469 470 switch (chg_type) {471 case MAX8997_CHARGER_TYPE_NONE:472 break;473 case MAX8997_CHARGER_TYPE_USB:474 adc = info->status[0] & STATUS1_ADC_MASK;475 adc >>= STATUS1_ADC_SHIFT;476 477 if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) {478 max8997_muic_handle_usb(info,479 MAX8997_USB_DEVICE, attached);480 }481 break;482 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:483 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,484 attached);485 break;486 case MAX8997_CHARGER_TYPE_DEDICATED_CHG:487 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,488 attached);489 break;490 case MAX8997_CHARGER_TYPE_500MA:491 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,492 attached);493 break;494 case MAX8997_CHARGER_TYPE_1A:495 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,496 attached);497 break;498 default:499 dev_err(info->dev,500 "failed to detect %s unknown chg cable (type:0x%x)\n",501 attached ? "attached" : "detached", chg_type);502 return -EINVAL;503 }504 505 return 0;506}507 508static void max8997_muic_irq_work(struct work_struct *work)509{510 struct max8997_muic_info *info = container_of(work,511 struct max8997_muic_info, irq_work);512 int irq_type = 0;513 int i, ret;514 515 if (!info->edev)516 return;517 518 mutex_lock(&info->mutex);519 520 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)521 if (info->irq == muic_irqs[i].virq)522 irq_type = muic_irqs[i].irq;523 524 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,525 2, info->status);526 if (ret) {527 dev_err(info->dev, "failed to read muic register\n");528 mutex_unlock(&info->mutex);529 return;530 }531 532 switch (irq_type) {533 case MAX8997_MUICIRQ_ADCError:534 case MAX8997_MUICIRQ_ADCLow:535 case MAX8997_MUICIRQ_ADC:536 /* Handle all of cable except for charger cable */537 ret = max8997_muic_adc_handler(info);538 break;539 case MAX8997_MUICIRQ_VBVolt:540 case MAX8997_MUICIRQ_DBChg:541 case MAX8997_MUICIRQ_DCDTmr:542 case MAX8997_MUICIRQ_ChgDetRun:543 case MAX8997_MUICIRQ_ChgTyp:544 case MAX8997_PMICIRQ_CHGINS:545 case MAX8997_PMICIRQ_CHGRM:546 /* Handle charger cable */547 ret = max8997_muic_chg_handler(info);548 break;549 case MAX8997_MUICIRQ_OVP:550 break;551 default:552 dev_info(info->dev, "misc interrupt: irq %d occurred\n",553 irq_type);554 mutex_unlock(&info->mutex);555 return;556 }557 558 if (ret < 0)559 dev_err(info->dev, "failed to handle MUIC interrupt\n");560 561 mutex_unlock(&info->mutex);562}563 564static irqreturn_t max8997_muic_irq_handler(int irq, void *data)565{566 struct max8997_muic_info *info = data;567 568 dev_dbg(info->dev, "irq:%d\n", irq);569 info->irq = irq;570 571 schedule_work(&info->irq_work);572 573 return IRQ_HANDLED;574}575 576static int max8997_muic_detect_dev(struct max8997_muic_info *info)577{578 int ret = 0;579 int adc;580 int chg_type;581 bool attached;582 583 mutex_lock(&info->mutex);584 585 /* Read STATUSx register to detect accessory */586 ret = max8997_bulk_read(info->muic,587 MAX8997_MUIC_REG_STATUS1, 2, info->status);588 if (ret) {589 dev_err(info->dev, "failed to read MUIC register\n");590 mutex_unlock(&info->mutex);591 return ret;592 }593 594 adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC,595 &attached);596 if (attached && adc != MAX8997_MUIC_ADC_OPEN) {597 ret = max8997_muic_adc_handler(info);598 if (ret < 0) {599 dev_err(info->dev, "Cannot detect ADC cable\n");600 mutex_unlock(&info->mutex);601 return ret;602 }603 }604 605 chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG,606 &attached);607 if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) {608 ret = max8997_muic_chg_handler(info);609 if (ret < 0) {610 dev_err(info->dev, "Cannot detect charger cable\n");611 mutex_unlock(&info->mutex);612 return ret;613 }614 }615 616 mutex_unlock(&info->mutex);617 618 return 0;619}620 621static void max8997_muic_detect_cable_wq(struct work_struct *work)622{623 struct max8997_muic_info *info = container_of(to_delayed_work(work),624 struct max8997_muic_info, wq_detcable);625 int ret;626 627 ret = max8997_muic_detect_dev(info);628 if (ret < 0)629 dev_err(info->dev, "failed to detect cable type\n");630}631 632static int max8997_muic_probe(struct platform_device *pdev)633{634 struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);635 struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);636 struct max8997_muic_info *info;637 int delay_jiffies;638 int cable_type;639 bool attached;640 int ret, i;641 642 info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),643 GFP_KERNEL);644 if (!info)645 return -ENOMEM;646 647 info->dev = &pdev->dev;648 info->muic = max8997->muic;649 650 platform_set_drvdata(pdev, info);651 mutex_init(&info->mutex);652 653 INIT_WORK(&info->irq_work, max8997_muic_irq_work);654 ret = devm_work_autocancel(&pdev->dev, &info->irq_work,655 max8997_muic_irq_work);656 if (ret)657 return ret;658 659 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {660 struct max8997_muic_irq *muic_irq = &muic_irqs[i];661 unsigned int virq = 0;662 663 virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);664 if (!virq)665 return -EINVAL;666 667 muic_irq->virq = virq;668 669 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,670 max8997_muic_irq_handler,671 IRQF_NO_SUSPEND,672 muic_irq->name, info);673 if (ret) {674 dev_err(&pdev->dev,675 "failed: irq request (IRQ: %d, error :%d)\n",676 muic_irq->irq, ret);677 return ret;678 }679 }680 681 /* External connector */682 info->edev = devm_extcon_dev_allocate(&pdev->dev, max8997_extcon_cable);683 if (IS_ERR(info->edev)) {684 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");685 return PTR_ERR(info->edev);686 }687 688 ret = devm_extcon_dev_register(&pdev->dev, info->edev);689 if (ret) {690 dev_err(&pdev->dev, "failed to register extcon device\n");691 return ret;692 }693 694 if (pdata && pdata->muic_pdata) {695 struct max8997_muic_platform_data *muic_pdata696 = pdata->muic_pdata;697 698 /* Initialize registers according to platform data */699 for (i = 0; i < muic_pdata->num_init_data; i++) {700 max8997_write_reg(info->muic,701 muic_pdata->init_data[i].addr,702 muic_pdata->init_data[i].data);703 }704 705 /*706 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB707 * h/w path of COMP2/COMN1 on CONTROL1 register.708 */709 if (muic_pdata->path_uart)710 info->path_uart = muic_pdata->path_uart;711 else712 info->path_uart = CONTROL1_SW_UART;713 714 if (muic_pdata->path_usb)715 info->path_usb = muic_pdata->path_usb;716 else717 info->path_usb = CONTROL1_SW_USB;718 719 /*720 * Default delay time for detecting cable state721 * after certain time.722 */723 if (muic_pdata->detcable_delay_ms)724 delay_jiffies =725 msecs_to_jiffies(muic_pdata->detcable_delay_ms);726 else727 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);728 } else {729 info->path_uart = CONTROL1_SW_UART;730 info->path_usb = CONTROL1_SW_USB;731 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);732 }733 734 /* Set initial path for UART when JIG is connected to get serial logs */735 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,736 2, info->status);737 if (ret) {738 dev_err(info->dev, "failed to read MUIC register\n");739 return ret;740 }741 cable_type = max8997_muic_get_cable_type(info,742 MAX8997_CABLE_GROUP_ADC, &attached);743 if (attached && cable_type == MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF)744 max8997_muic_set_path(info, info->path_uart, true);745 746 /* Set ADC debounce time */747 max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);748 749 /*750 * Detect accessory after completing the initialization of platform751 *752 * - Use delayed workqueue to detect cable state and then753 * notify cable state to notifiee/platform through uevent.754 * After completing the booting of platform, the extcon provider755 * driver should notify cable state to upper layer.756 */757 INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq);758 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,759 delay_jiffies);760 761 return 0;762}763 764static struct platform_driver max8997_muic_driver = {765 .driver = {766 .name = DEV_NAME,767 },768 .probe = max8997_muic_probe,769};770 771module_platform_driver(max8997_muic_driver);772 773MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");774MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");775MODULE_LICENSE("GPL");776MODULE_ALIAS("platform:max8997-muic");777