drivers/extcon/extcon-max77693.c

   1 /*
   2  * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
   3  *
   4  * Copyright (C) 2012 Samsung Electrnoics
   5  * Chanwoo Choi <cw00.choi@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/i2c.h>
  21 #include <linux/slab.h>
  22 #include <linux/input.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/err.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/mfd/max77693.h>
  27 #include <linux/mfd/max77693-private.h>
  28 #include <linux/extcon.h>
  29 #include <linux/regmap.h>
  30 #include <linux/irqdomain.h>
  31
  32 #define DEV_NAME                        "max77693-muic"
  33 #define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
  34
  35 enum max77693_muic_adc_debounce_time {
  36         ADC_DEBOUNCE_TIME_5MS = 0,
  37         ADC_DEBOUNCE_TIME_10MS,
  38         ADC_DEBOUNCE_TIME_25MS,
  39         ADC_DEBOUNCE_TIME_38_62MS,
  40 };
  41
  42 struct max77693_muic_info {
  43         struct device *dev;
  44         struct max77693_dev *max77693;
  45         struct extcon_dev *edev;
  46         int prev_cable_type;
  47         int prev_cable_type_gnd;
  48         int prev_chg_type;
  49         int prev_button_type;
  50         u8 status[2];
  51
  52         int irq;
  53         struct work_struct irq_work;
  54         struct mutex mutex;
  55
  56         /*
  57          * Use delayed workqueue to detect cable state and then
  58          * notify cable state to notifiee/platform through uevent.
  59          * After completing the booting of platform, the extcon provider
  60          * driver should notify cable state to upper layer.
  61          */
  62         struct delayed_work wq_detcable;
  63
  64         /* Button of dock device */
  65         struct input_dev *dock;
  66
  67         /*
  68          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
  69          * h/w path of COMP2/COMN1 on CONTROL1 register.
  70          */
  71         int path_usb;
  72         int path_uart;
  73 };
  74
  75 enum max77693_muic_cable_group {
  76         MAX77693_CABLE_GROUP_ADC = 0,
  77         MAX77693_CABLE_GROUP_ADC_GND,
  78         MAX77693_CABLE_GROUP_CHG,
  79         MAX77693_CABLE_GROUP_VBVOLT,
  80 };
  81
  82 enum max77693_muic_charger_type {
  83         MAX77693_CHARGER_TYPE_NONE = 0,
  84         MAX77693_CHARGER_TYPE_USB,
  85         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
  86         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
  87         MAX77693_CHARGER_TYPE_APPLE_500MA,
  88         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
  89         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
  90 };
  91
  92 /**
  93  * struct max77693_muic_irq
  94  * @irq: the index of irq list of MUIC device.
  95  * @name: the name of irq.
  96  * @virq: the virtual irq to use irq domain
  97  */
  98 struct max77693_muic_irq {
  99         unsigned int irq;
 100         const char *name;
 101         unsigned int virq;
 102 };
 103
 104 static struct max77693_muic_irq muic_irqs[] = {
 105         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
 106         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
 107         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
 108         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
 109         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
 110         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
 111         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
 112         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
 113         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
 114         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
 115         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
 116         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
 117         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
 118         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
 119         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
 120         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
 121 };
 122
 123 /* Define supported accessory type */
 124 enum max77693_muic_acc_type {
 125         MAX77693_MUIC_ADC_GROUND = 0x0,
 126         MAX77693_MUIC_ADC_SEND_END_BUTTON,
 127         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
 128         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
 129         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
 130         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
 131         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
 132         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
 133         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
 134         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
 135         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
 136         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
 137         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
 138         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
 139         MAX77693_MUIC_ADC_RESERVED_ACC_1,
 140         MAX77693_MUIC_ADC_RESERVED_ACC_2,
 141         MAX77693_MUIC_ADC_RESERVED_ACC_3,
 142         MAX77693_MUIC_ADC_RESERVED_ACC_4,
 143         MAX77693_MUIC_ADC_RESERVED_ACC_5,
 144         MAX77693_MUIC_ADC_CEA936_AUDIO,
 145         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
 146         MAX77693_MUIC_ADC_TTY_CONVERTER,
 147         MAX77693_MUIC_ADC_UART_CABLE,
 148         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
 149         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
 150         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
 151         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
 152         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
 153         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
 154         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
 155         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
 156         MAX77693_MUIC_ADC_OPEN,
 157
 158         /* The below accessories have same ADC value so ADCLow and
 159            ADC1K bit is used to separate specific accessory */
 160         MAX77693_MUIC_GND_USB_OTG = 0x100,      /* ADC:0x0, VBVolot:0, ADCLow:0, ADC1K:0 */
 161         MAX77693_MUIC_GND_USB_OTG_VB = 0x104,   /* ADC:0x0, VBVolot:1, ADCLow:0, ADC1K:0 */
 162         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:0 */
 163         MAX77693_MUIC_GND_MHL = 0x103,          /* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:1 */
 164         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* ADC:0x0, VBVolot:1, ADCLow:1, ADC1K:1 */
 165 };
 166
 167 /* MAX77693 MUIC device support below list of accessories(external connector) */
 168 enum {
 169         EXTCON_CABLE_USB = 0,
 170         EXTCON_CABLE_USB_HOST,
 171         EXTCON_CABLE_TA,
 172         EXTCON_CABLE_FAST_CHARGER,
 173         EXTCON_CABLE_SLOW_CHARGER,
 174         EXTCON_CABLE_CHARGE_DOWNSTREAM,
 175         EXTCON_CABLE_MHL,
 176         EXTCON_CABLE_MHL_TA,
 177         EXTCON_CABLE_JIG_USB_ON,
 178         EXTCON_CABLE_JIG_USB_OFF,
 179         EXTCON_CABLE_JIG_UART_OFF,
 180         EXTCON_CABLE_JIG_UART_ON,
 181         EXTCON_CABLE_DOCK_SMART,
 182         EXTCON_CABLE_DOCK_DESK,
 183         EXTCON_CABLE_DOCK_AUDIO,
 184
 185         _EXTCON_CABLE_NUM,
 186 };
 187
 188 const char *max77693_extcon_cable[] = {
 189         [EXTCON_CABLE_USB]                      = "USB",
 190         [EXTCON_CABLE_USB_HOST]                 = "USB-Host",
 191         [EXTCON_CABLE_TA]                       = "TA",
 192         [EXTCON_CABLE_FAST_CHARGER]             = "Fast-charger",
 193         [EXTCON_CABLE_SLOW_CHARGER]             = "Slow-charger",
 194         [EXTCON_CABLE_CHARGE_DOWNSTREAM]        = "Charge-downstream",
 195         [EXTCON_CABLE_MHL]                      = "MHL",
 196         [EXTCON_CABLE_MHL_TA]                   = "MHL_TA",
 197         [EXTCON_CABLE_JIG_USB_ON]               = "JIG-USB-ON",
 198         [EXTCON_CABLE_JIG_USB_OFF]              = "JIG-USB-OFF",
 199         [EXTCON_CABLE_JIG_UART_OFF]             = "JIG-UART-OFF",
 200         [EXTCON_CABLE_JIG_UART_ON]              = "Dock-Car",
 201         [EXTCON_CABLE_DOCK_SMART]               = "Dock-Smart",
 202         [EXTCON_CABLE_DOCK_DESK]                = "Dock-Desk",
 203         [EXTCON_CABLE_DOCK_AUDIO]               = "Dock-Audio",
 204
 205         NULL,
 206 };
 207
 208 /*
 209  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 210  * @info: the instance including private data of max77693 MUIC
 211  * @time: the debounce time of ADC
 212  */
 213 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 214                 enum max77693_muic_adc_debounce_time time)
 215 {
 216         int ret;
 217
 218         switch (time) {
 219         case ADC_DEBOUNCE_TIME_5MS:
 220         case ADC_DEBOUNCE_TIME_10MS:
 221         case ADC_DEBOUNCE_TIME_25MS:
 222         case ADC_DEBOUNCE_TIME_38_62MS:
 223                 ret = max77693_update_reg(info->max77693->regmap_muic,
 224                                           MAX77693_MUIC_REG_CTRL3,
 225                                           time << CONTROL3_ADCDBSET_SHIFT,
 226                                           CONTROL3_ADCDBSET_MASK);
 227                 if (ret)
 228                         dev_err(info->dev, "failed to set ADC debounce time\n");
 229                 break;
 230         default:
 231                 dev_err(info->dev, "invalid ADC debounce time\n");
 232                 ret = -EINVAL;
 233                 break;
 234         }
 235
 236         return ret;
 237 };
 238
 239 /*
 240  * max77693_muic_set_path - Set hardware line according to attached cable
 241  * @info: the instance including private data of max77693 MUIC
 242  * @value: the path according to attached cable
 243  * @attached: the state of cable (true:attached, false:detached)
 244  *
 245  * The max77693 MUIC device share outside H/W line among a varity of cables
 246  * so, this function set internal path of H/W line according to the type of
 247  * attached cable.
 248  */
 249 static int max77693_muic_set_path(struct max77693_muic_info *info,
 250                 u8 val, bool attached)
 251 {
 252         int ret = 0;
 253         u8 ctrl1, ctrl2 = 0;
 254
 255         if (attached)
 256                 ctrl1 = val;
 257         else
 258                 ctrl1 = CONTROL1_SW_OPEN;
 259
 260         ret = max77693_update_reg(info->max77693->regmap_muic,
 261                         MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
 262         if (ret < 0) {
 263                 dev_err(info->dev, "failed to update MUIC register\n");
 264                 goto out;
 265         }
 266
 267         if (attached)
 268                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
 269         else
 270                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
 271
 272         ret = max77693_update_reg(info->max77693->regmap_muic,
 273                         MAX77693_MUIC_REG_CTRL2, ctrl2,
 274                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
 275         if (ret < 0) {
 276                 dev_err(info->dev, "failed to update MUIC register\n");
 277                 goto out;
 278         }
 279
 280         dev_info(info->dev,
 281                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 282                 ctrl1, ctrl2, attached ? "attached" : "detached");
 283 out:
 284         return ret;
 285 }
 286
 287 /*
 288  * max77693_muic_get_cable_type - Return cable type and check cable state
 289  * @info: the instance including private data of max77693 MUIC
 290  * @group: the path according to attached cable
 291  * @attached: store cable state and return
 292  *
 293  * This function check the cable state either attached or detached,
 294  * and then divide precise type of cable according to cable group.
 295  *      - MAX77693_CABLE_GROUP_ADC
 296  *      - MAX77693_CABLE_GROUP_ADC_GND
 297  *      - MAX77693_CABLE_GROUP_CHG
 298  *      - MAX77693_CABLE_GROUP_VBVOLT
 299  */
 300 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 301                 enum max77693_muic_cable_group group, bool *attached)
 302 {
 303         int cable_type = 0;
 304         int adc;
 305         int adc1k;
 306         int adclow;
 307         int vbvolt;
 308         int chg_type;
 309
 310         switch (group) {
 311         case MAX77693_CABLE_GROUP_ADC:
 312                 /*
 313                  * Read ADC value to check cable type and decide cable state
 314                  * according to cable type
 315                  */
 316                 adc = info->status[0] & STATUS1_ADC_MASK;
 317                 adc >>= STATUS1_ADC_SHIFT;
 318
 319                 /*
 320                  * Check current cable state/cable type and store cable type
 321                  * (info->prev_cable_type) for handling cable when cable is
 322                  * detached.
 323                  */
 324                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 325                         *attached = false;
 326
 327                         cable_type = info->prev_cable_type;
 328                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 329                 } else {
 330                         *attached = true;
 331
 332                         cable_type = info->prev_cable_type = adc;
 333                 }
 334                 break;
 335         case MAX77693_CABLE_GROUP_ADC_GND:
 336                 /*
 337                  * Read ADC value to check cable type and decide cable state
 338                  * according to cable type
 339                  */
 340                 adc = info->status[0] & STATUS1_ADC_MASK;
 341                 adc >>= STATUS1_ADC_SHIFT;
 342
 343                 /*
 344                  * Check current cable state/cable type and store cable type
 345                  * (info->prev_cable_type/_gnd) for handling cable when cable
 346                  * is detached.
 347                  */
 348                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 349                         *attached = false;
 350
 351                         cable_type = info->prev_cable_type_gnd;
 352                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 353                 } else {
 354                         *attached = true;
 355
 356                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
 357                         adclow >>= STATUS1_ADCLOW_SHIFT;
 358                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
 359                         adc1k >>= STATUS1_ADC1K_SHIFT;
 360
 361                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 362                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
 363
 364                         /**
 365                          * [0x1][VBVolt][ADCLow][ADC1K]
 366                          * [0x1    0       0       0  ] : USB_OTG
 367                          * [0x1    1       0       0  ] : USB_OTG_VB
 368                          * [0x1    0       1       0  ] : Audio Video Cable with load
 369                          * [0x1    0       1       1  ] : MHL without charging connector
 370                          * [0x1    1       1       1  ] : MHL with charging connector
 371                          */
 372                         cable_type = ((0x1 << 8)
 373                                         | (vbvolt << 2)
 374                                         | (adclow << 1)
 375                                         | adc1k);
 376
 377                         info->prev_cable_type = adc;
 378                         info->prev_cable_type_gnd = cable_type;
 379                 }
 380
 381                 break;
 382         case MAX77693_CABLE_GROUP_CHG:
 383                 /*
 384                  * Read charger type to check cable type and decide cable state
 385                  * according to type of charger cable.
 386                  */
 387                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 388                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 389
 390                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 391                         *attached = false;
 392
 393                         cable_type = info->prev_chg_type;
 394                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 395                 } else {
 396                         *attached = true;
 397
 398                         /*
 399                          * Check current cable state/cable type and store cable
 400                          * type(info->prev_chg_type) for handling cable when
 401                          * charger cable is detached.
 402                          */
 403                         cable_type = info->prev_chg_type = chg_type;
 404                 }
 405
 406                 break;
 407         case MAX77693_CABLE_GROUP_VBVOLT:
 408                 /*
 409                  * Read ADC value to check cable type and decide cable state
 410                  * according to cable type
 411                  */
 412                 adc = info->status[0] & STATUS1_ADC_MASK;
 413                 adc >>= STATUS1_ADC_SHIFT;
 414                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 415                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 416
 417                 if (adc == MAX77693_MUIC_ADC_OPEN
 418                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 419                         *attached = false;
 420                 else
 421                         *attached = true;
 422
 423                 /*
 424                  * Read vbvolt field, if vbvolt is 1,
 425                  * this cable is used for charging.
 426                  */
 427                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 428                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
 429
 430                 cable_type = vbvolt;
 431                 break;
 432         default:
 433                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 434                 cable_type = -EINVAL;
 435                 break;
 436         }
 437
 438         return cable_type;
 439 }
 440
 441 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 442                 int cable_type, bool attached)
 443 {
 444         int ret = 0;
 445         char dock_name[CABLE_NAME_MAX];
 446
 447         dev_info(info->dev,
 448                 "external connector is %s (adc:0x%02x)\n",
 449                 attached ? "attached" : "detached", cable_type);
 450
 451         switch (cable_type) {
 452         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 453                 /* PATH:AP_USB */
 454                 ret = max77693_muic_set_path(info,
 455                                 CONTROL1_SW_USB, attached);
 456                 if (ret < 0)
 457                         goto out;
 458
 459                 /* Dock-Smart */
 460                 extcon_set_cable_state(info->edev, "Dock-Smart", attached);
 461                 goto out;
 462         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
 463                 strcpy(dock_name, "Dock-Car");
 464                 break;
 465         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 466                 strcpy(dock_name, "Dock-Desk");
 467                 break;
 468         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 469                 strcpy(dock_name, "Dock-Audio");
 470                 if (!attached)
 471                         extcon_set_cable_state(info->edev, "USB", false);
 472                 break;
 473         }
 474
 475         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 476         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 477         if (ret < 0)
 478                 goto out;
 479         extcon_set_cable_state(info->edev, dock_name, attached);
 480
 481 out:
 482         return ret;
 483 }
 484
 485 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 486                 int button_type, bool attached)
 487 {
 488         struct input_dev *dock = info->dock;
 489         unsigned int code;
 490         int ret = 0;
 491
 492         switch (button_type) {
 493         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 494                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 495                 /* DOCK_KEY_PREV */
 496                 code = KEY_PREVIOUSSONG;
 497                 break;
 498         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 499                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 500                 /* DOCK_KEY_NEXT */
 501                 code = KEY_NEXTSONG;
 502                 break;
 503         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 504                 /* DOCK_VOL_DOWN */
 505                 code = KEY_VOLUMEDOWN;
 506                 break;
 507         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 508                 /* DOCK_VOL_UP */
 509                 code = KEY_VOLUMEUP;
 510                 break;
 511         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 512                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 513                 /* DOCK_KEY_PLAY_PAUSE */
 514                 code = KEY_PLAYPAUSE;
 515                 break;
 516         default:
 517                 dev_err(info->dev,
 518                         "failed to detect %s key (adc:0x%x)\n",
 519                         attached ? "pressed" : "released", button_type);
 520                 ret = -EINVAL;
 521                 goto out;
 522         }
 523
 524         input_event(dock, EV_KEY, code, attached);
 525         input_sync(dock);
 526
 527 out:
 528         return 0;
 529 }
 530
 531 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 532 {
 533         int cable_type_gnd;
 534         int ret = 0;
 535         bool attached;
 536
 537         cable_type_gnd = max77693_muic_get_cable_type(info,
 538                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 539
 540         switch (cable_type_gnd) {
 541         case MAX77693_MUIC_GND_USB_OTG:
 542         case MAX77693_MUIC_GND_USB_OTG_VB:
 543                 /* USB_OTG, PATH: AP_USB */
 544                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 545                 if (ret < 0)
 546                         goto out;
 547                 extcon_set_cable_state(info->edev, "USB-Host", attached);
 548                 break;
 549         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 550                 /* Audio Video Cable with load, PATH:AUDIO */
 551                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 552                 if (ret < 0)
 553                         goto out;
 554                 extcon_set_cable_state(info->edev,
 555                                 "Audio-video-load", attached);
 556                 break;
 557         case MAX77693_MUIC_GND_MHL:
 558         case MAX77693_MUIC_GND_MHL_VB:
 559                 /* MHL or MHL with USB/TA cable */
 560                 extcon_set_cable_state(info->edev, "MHL", attached);
 561                 break;
 562         default:
 563                 dev_err(info->dev, "failed to detect %s accessory\n",
 564                         attached ? "attached" : "detached");
 565                 ret = -EINVAL;
 566                 break;
 567         }
 568
 569 out:
 570         return ret;
 571 }
 572
 573 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 574                 int cable_type, bool attached)
 575 {
 576         char cable_name[32];
 577         int ret = 0;
 578         u8 path = CONTROL1_SW_OPEN;
 579
 580         dev_info(info->dev,
 581                 "external connector is %s (adc:0x%02x)\n",
 582                 attached ? "attached" : "detached", cable_type);
 583
 584         switch (cable_type) {
 585         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 586                 /* PATH:AP_USB */
 587                 strcpy(cable_name, "JIG-USB-OFF");
 588                 path = CONTROL1_SW_USB;
 589                 break;
 590         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 591                 /* PATH:AP_USB */
 592                 strcpy(cable_name, "JIG-USB-ON");
 593                 path = CONTROL1_SW_USB;
 594                 break;
 595         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 596                 /* PATH:AP_UART */
 597                 strcpy(cable_name, "JIG-UART-OFF");
 598                 path = CONTROL1_SW_UART;
 599                 break;
 600         }
 601
 602         ret = max77693_muic_set_path(info, path, attached);
 603         if (ret < 0)
 604                 goto out;
 605
 606         extcon_set_cable_state(info->edev, cable_name, attached);
 607 out:
 608         return ret;
 609 }
 610
 611 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 612 {
 613         int cable_type;
 614         int button_type;
 615         bool attached;
 616         int ret = 0;
 617
 618         /* Check accessory state which is either detached or attached */
 619         cable_type = max77693_muic_get_cable_type(info,
 620                                 MAX77693_CABLE_GROUP_ADC, &attached);
 621
 622         dev_info(info->dev,
 623                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 624                 attached ? "attached" : "detached", cable_type,
 625                 info->prev_cable_type);
 626
 627         switch (cable_type) {
 628         case MAX77693_MUIC_ADC_GROUND:
 629                 /* USB_OTG/MHL/Audio */
 630                 max77693_muic_adc_ground_handler(info);
 631                 break;
 632         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 633         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 634         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 635                 /* JIG */
 636                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 637                 if (ret < 0)
 638                         goto out;
 639                 break;
 640         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 641         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
 642         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 643         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 644                 /*
 645                  * DOCK device
 646                  *
 647                  * The MAX77693 MUIC device can detect total 34 cable type
 648                  * except of charger cable and MUIC device didn't define
 649                  * specfic role of cable in the range of from 0x01 to 0x12
 650                  * of ADC value. So, can use/define cable with no role according
 651                  * to schema of hardware board.
 652                  */
 653                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 654                 if (ret < 0)
 655                         goto out;
 656                 break;
 657         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:        /* DOCK_KEY_PREV */
 658         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:        /* DOCK_KEY_NEXT */
 659         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:        /* DOCK_VOL_DOWN */
 660         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:       /* DOCK_VOL_UP */
 661         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:       /* DOCK_KEY_PLAY_PAUSE */
 662                 /*
 663                  * Button of DOCK device
 664                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 665                  *
 666                  * The MAX77693 MUIC device can detect total 34 cable type
 667                  * except of charger cable and MUIC device didn't define
 668                  * specfic role of cable in the range of from 0x01 to 0x12
 669                  * of ADC value. So, can use/define cable with no role according
 670                  * to schema of hardware board.
 671                  */
 672                 if (attached)
 673                         button_type = info->prev_button_type = cable_type;
 674                 else
 675                         button_type = info->prev_button_type;
 676
 677                 ret = max77693_muic_dock_button_handler(info, button_type,
 678                                                         attached);
 679                 if (ret < 0)
 680                         goto out;
 681                 break;
 682         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 683         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 684         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 685         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 686         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 687         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 688         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 689         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 690         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 691         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 692         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 693         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 694         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 695         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 696         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 697         case MAX77693_MUIC_ADC_UART_CABLE:
 698         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 699         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 700                 /*
 701                  * This accessory isn't used in general case if it is specially
 702                  * needed to detect additional accessory, should implement
 703                  * proper operation when this accessory is attached/detached.
 704                  */
 705                 dev_info(info->dev,
 706                         "accessory is %s but it isn't used (adc:0x%x)\n",
 707                         attached ? "attached" : "detached", cable_type);
 708                 goto out;
 709         default:
 710                 dev_err(info->dev,
 711                         "failed to detect %s accessory (adc:0x%x)\n",
 712                         attached ? "attached" : "detached", cable_type);
 713                 ret = -EINVAL;
 714                 goto out;
 715         }
 716
 717 out:
 718         return ret;
 719 }
 720
 721 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 722 {
 723         int chg_type;
 724         int cable_type_gnd;
 725         int cable_type;
 726         bool attached;
 727         bool cable_attached;
 728         int ret = 0;
 729
 730         chg_type = max77693_muic_get_cable_type(info,
 731                                 MAX77693_CABLE_GROUP_CHG, &attached);
 732
 733         dev_info(info->dev,
 734                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 735                         attached ? "attached" : "detached",
 736                         chg_type, info->prev_chg_type);
 737
 738         switch (chg_type) {
 739         case MAX77693_CHARGER_TYPE_USB:
 740                 /*
 741                  * MHL_TA(USB/TA) with MHL cable
 742                  * - MHL cable include two port(HDMI line and separate micro
 743                  * -usb port. When the target connect MHL cable, extcon driver
 744                  * check whether MHL_TA(USB/TA) cable is connected. If MHL_TA
 745                  * cable is connected, extcon driver notify state to notifiee
 746                  * for charging battery.
 747                  */
 748                 cable_type_gnd = max77693_muic_get_cable_type(info,
 749                                         MAX77693_CABLE_GROUP_ADC_GND,
 750                                         &cable_attached);
 751                 if (cable_type_gnd == MAX77693_MUIC_GND_MHL
 752                         || cable_type_gnd == MAX77693_MUIC_GND_MHL_VB) {
 753                         extcon_set_cable_state(info->edev, "MHL_TA", attached);
 754
 755                         if (!cable_attached)
 756                                 extcon_set_cable_state(info->edev,
 757                                         "MHL", false);
 758                         goto out;
 759                 }
 760
 761                 /*
 762                  * USB/TA cable with Dock-Audio device
 763                  * - Dock device include two port(Dock-Audio and micro-usb
 764                  * port). When the target connect Dock-Audio device, extcon
 765                  * driver check whether USB/TA cable is connected.
 766                  * If USB/TA cable is connected, extcon driver notify state
 767                  * to notifiee for charging battery.
 768                  */
 769                 cable_type = max77693_muic_get_cable_type(info,
 770                                         MAX77693_CABLE_GROUP_ADC,
 771                                         &cable_attached);
 772                 if (cable_type == MAX77693_MUIC_ADC_AV_CABLE_NOLOAD) {
 773                         extcon_set_cable_state(info->edev, "USB", attached);
 774
 775                         if (!cable_attached)
 776                                 extcon_set_cable_state(info->edev,
 777                                                 "Dock-Audio", false);
 778                         goto out;
 779                 }
 780
 781                 /* Only USB cable, PATH:AP_USB */
 782                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 783                 if (ret < 0)
 784                         goto out;
 785                 extcon_set_cable_state(info->edev, "USB", attached);
 786                 break;
 787         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 788                 extcon_set_cable_state(info->edev,
 789                                 "Charge-downstream", attached);
 790                 break;
 791         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 792                 extcon_set_cable_state(info->edev, "TA", attached);
 793                 break;
 794         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 795                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
 796                 break;
 797         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 798                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
 799                 break;
 800         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 801                 break;
 802         default:
 803                 dev_err(info->dev,
 804                         "failed to detect %s accessory (chg_type:0x%x)\n",
 805                         attached ? "attached" : "detached", chg_type);
 806                 ret = -EINVAL;
 807                 goto out;
 808         }
 809
 810 out:
 811         return ret;
 812 }
 813
 814 static void max77693_muic_irq_work(struct work_struct *work)
 815 {
 816         struct max77693_muic_info *info = container_of(work,
 817                         struct max77693_muic_info, irq_work);
 818         int irq_type = -1;
 819         int i, ret = 0;
 820
 821         if (!info->edev)
 822                 return;
 823
 824         mutex_lock(&info->mutex);
 825
 826         for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
 827                 if (info->irq == muic_irqs[i].virq)
 828                         irq_type = muic_irqs[i].irq;
 829
 830         ret = max77693_bulk_read(info->max77693->regmap_muic,
 831                         MAX77693_MUIC_REG_STATUS1, 2, info->status);
 832         if (ret) {
 833                 dev_err(info->dev, "failed to read MUIC register\n");
 834                 mutex_unlock(&info->mutex);
 835                 return;
 836         }
 837
 838         switch (irq_type) {
 839         case MAX77693_MUIC_IRQ_INT1_ADC:
 840         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 841         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 842         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 843                 /* Handle all of accessory except for
 844                    type of charger accessory */
 845                 ret = max77693_muic_adc_handler(info);
 846                 break;
 847         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 848         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 849         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 850         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 851         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 852         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 853                 /* Handle charger accessory */
 854                 ret = max77693_muic_chg_handler(info);
 855                 break;
 856         case MAX77693_MUIC_IRQ_INT3_EOC:
 857         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 858         case MAX77693_MUIC_IRQ_INT3_OVP:
 859         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 860         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 861         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 862                 break;
 863         default:
 864                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 865                                 irq_type);
 866                 break;
 867         }
 868
 869         if (ret < 0)
 870                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 871
 872         mutex_unlock(&info->mutex);
 873
 874         return;
 875 }
 876
 877 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
 878 {
 879         struct max77693_muic_info *info = data;
 880
 881         info->irq = irq;
 882         schedule_work(&info->irq_work);
 883
 884         return IRQ_HANDLED;
 885 }
 886
 887 static struct regmap_config max77693_muic_regmap_config = {
 888         .reg_bits = 8,
 889         .val_bits = 8,
 890 };
 891
 892 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
 893 {
 894         int ret = 0;
 895         int adc;
 896         int chg_type;
 897         bool attached;
 898
 899         mutex_lock(&info->mutex);
 900
 901         /* Read STATUSx register to detect accessory */
 902         ret = max77693_bulk_read(info->max77693->regmap_muic,
 903                         MAX77693_MUIC_REG_STATUS1, 2, info->status);
 904         if (ret) {
 905                 dev_err(info->dev, "failed to read MUIC register\n");
 906                 mutex_unlock(&info->mutex);
 907                 return -EINVAL;
 908         }
 909
 910         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
 911                                         &attached);
 912         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
 913                 ret = max77693_muic_adc_handler(info);
 914                 if (ret < 0)
 915                         dev_err(info->dev, "Cannot detect accessory\n");
 916         }
 917
 918         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
 919                                         &attached);
 920         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
 921                 ret = max77693_muic_chg_handler(info);
 922                 if (ret < 0)
 923                         dev_err(info->dev, "Cannot detect charger accessory\n");
 924         }
 925
 926         mutex_unlock(&info->mutex);
 927
 928         return ret;
 929 }
 930
 931 static void max77693_muic_detect_cable_wq(struct work_struct *work)
 932 {
 933         struct max77693_muic_info *info = container_of(to_delayed_work(work),
 934                                 struct max77693_muic_info, wq_detcable);
 935
 936         max77693_muic_detect_accessory(info);
 937 }
 938
 939 static int max77693_muic_probe(struct platform_device *pdev)
 940 {
 941         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
 942         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
 943         struct max77693_muic_platform_data *muic_pdata = pdata->muic_data;
 944         struct max77693_muic_info *info;
 945         int delay_jiffies;
 946         int ret;
 947         int i;
 948         u8 id;
 949
 950         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
 951                                    GFP_KERNEL);
 952         if (!info) {
 953                 dev_err(&pdev->dev, "failed to allocate memory\n");
 954                 return -ENOMEM;
 955         }
 956         info->dev = &pdev->dev;
 957         info->max77693 = max77693;
 958         if (info->max77693->regmap_muic) {
 959                 dev_dbg(&pdev->dev, "allocate register map\n");
 960         } else {
 961                 info->max77693->regmap_muic = devm_regmap_init_i2c(
 962                                                 info->max77693->muic,
 963                                                 &max77693_muic_regmap_config);
 964                 if (IS_ERR(info->max77693->regmap_muic)) {
 965                         ret = PTR_ERR(info->max77693->regmap_muic);
 966                         dev_err(max77693->dev,
 967                                 "failed to allocate register map: %d\n", ret);
 968                         return ret;
 969                 }
 970         }
 971
 972         /* Register input device for button of dock device */
 973         info->dock = input_allocate_device();
 974         if (!info->dock) {
 975                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
 976                 return -ENOMEM;
 977         }
 978         info->dock->name = "max77693-muic/dock";
 979         info->dock->phys = "max77693-muic/extcon";
 980         info->dock->dev.parent = &pdev->dev;
 981
 982         __set_bit(EV_REP, info->dock->evbit);
 983
 984         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
 985         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
 986         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
 987         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
 988         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
 989
 990         ret = input_register_device(info->dock);
 991         if (ret < 0) {
 992                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
 993                                 ret);
 994                 return ret;
 995         }
 996
 997         platform_set_drvdata(pdev, info);
 998         mutex_init(&info->mutex);
 999
1000         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1001
1002         /* Support irq domain for MAX77693 MUIC device */
1003         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1004                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1005                 unsigned int virq = 0;
1006
1007                 virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
1008                 if (!virq) {
1009                         ret = -EINVAL;
1010                         goto err_irq;
1011                 }
1012                 muic_irq->virq = virq;
1013
1014                 ret = request_threaded_irq(virq, NULL,
1015                                 max77693_muic_irq_handler,
1016                                 IRQF_NO_SUSPEND,
1017                                 muic_irq->name, info);
1018                 if (ret) {
1019                         dev_err(&pdev->dev,
1020                                 "failed: irq request (IRQ: %d,"
1021                                 " error :%d)\n",
1022                                 muic_irq->irq, ret);
1023                         goto err_irq;
1024                 }
1025         }
1026
1027         /* Initialize extcon device */
1028         info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
1029                                   GFP_KERNEL);
1030         if (!info->edev) {
1031                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1032                 ret = -ENOMEM;
1033                 goto err_irq;
1034         }
1035         info->edev->name = DEV_NAME;
1036         info->edev->supported_cable = max77693_extcon_cable;
1037         ret = extcon_dev_register(info->edev, NULL);
1038         if (ret) {
1039                 dev_err(&pdev->dev, "failed to register extcon device\n");
1040                 goto err_irq;
1041         }
1042
1043         /* Initialize MUIC register by using platform data */
1044         for (i = 0 ; i < muic_pdata->num_init_data ; i++) {
1045                 enum max77693_irq_source irq_src = MAX77693_IRQ_GROUP_NR;
1046
1047                 max77693_write_reg(info->max77693->regmap_muic,
1048                                 muic_pdata->init_data[i].addr,
1049                                 muic_pdata->init_data[i].data);
1050
1051                 switch (muic_pdata->init_data[i].addr) {
1052                 case MAX77693_MUIC_REG_INTMASK1:
1053                         irq_src = MUIC_INT1;
1054                         break;
1055                 case MAX77693_MUIC_REG_INTMASK2:
1056                         irq_src = MUIC_INT2;
1057                         break;
1058                 case MAX77693_MUIC_REG_INTMASK3:
1059                         irq_src = MUIC_INT3;
1060                         break;
1061                 }
1062
1063                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1064                         info->max77693->irq_masks_cur[irq_src]
1065                                 = muic_pdata->init_data[i].data;
1066         }
1067
1068         /*
1069          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1070          * h/w path of COMP2/COMN1 on CONTROL1 register.
1071          */
1072         if (muic_pdata->path_uart)
1073                 info->path_uart = muic_pdata->path_uart;
1074         else
1075                 info->path_uart = CONTROL1_SW_UART;
1076
1077         if (muic_pdata->path_usb)
1078                 info->path_usb = muic_pdata->path_usb;
1079         else
1080                 info->path_usb = CONTROL1_SW_USB;
1081
1082         /* Set initial path for UART */
1083          max77693_muic_set_path(info, info->path_uart, true);
1084
1085         /* Check revision number of MUIC device*/
1086         ret = max77693_read_reg(info->max77693->regmap_muic,
1087                         MAX77693_MUIC_REG_ID, &id);
1088         if (ret < 0) {
1089                 dev_err(&pdev->dev, "failed to read revision number\n");
1090                 goto err_extcon;
1091         }
1092         dev_info(info->dev, "device ID : 0x%x\n", id);
1093
1094         /* Set ADC debounce time */
1095         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1096
1097         /*
1098          * Detect accessory after completing the initialization of platform
1099          *
1100          * - Use delayed workqueue to detect cable state and then
1101          * notify cable state to notifiee/platform through uevent.
1102          * After completing the booting of platform, the extcon provider
1103          * driver should notify cable state to upper layer.
1104          */
1105         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1106         if (muic_pdata->detcable_delay_ms)
1107                 delay_jiffies = msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1108         else
1109                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1110         schedule_delayed_work(&info->wq_detcable, delay_jiffies);
1111
1112         return ret;
1113
1114 err_extcon:
1115         extcon_dev_unregister(info->edev);
1116 err_irq:
1117         while (--i >= 0)
1118                 free_irq(muic_irqs[i].virq, info);
1119         return ret;
1120 }
1121
1122 static int max77693_muic_remove(struct platform_device *pdev)
1123 {
1124         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1125         int i;
1126
1127         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
1128                 free_irq(muic_irqs[i].virq, info);
1129         cancel_work_sync(&info->irq_work);
1130         input_unregister_device(info->dock);
1131         extcon_dev_unregister(info->edev);
1132
1133         return 0;
1134 }
1135
1136 static struct platform_driver max77693_muic_driver = {
1137         .driver         = {
1138                 .name   = DEV_NAME,
1139                 .owner  = THIS_MODULE,
1140         },
1141         .probe          = max77693_muic_probe,
1142         .remove         = max77693_muic_remove,
1143 };
1144
1145 module_platform_driver(max77693_muic_driver);
1146
1147 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1148 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1149 MODULE_LICENSE("GPL");
1150 MODULE_ALIAS("platform:extcon-max77693");