drivers/extcon/extcon-max77693.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
   4 //
   5 // Copyright (C) 2012 Samsung Electrnoics
   6 // Chanwoo Choi <cw00.choi@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/input.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/err.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/mfd/max77693.h>
  18 #include <linux/mfd/max77693-common.h>
  19 #include <linux/mfd/max77693-private.h>
  20 #include <linux/extcon-provider.h>
  21 #include <linux/regmap.h>
  22 #include <linux/irqdomain.h>
  23
  24 #define DEV_NAME                        "max77693-muic"
  25 #define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
  26
  27 /*
  28  * Default value of MAX77693 register to bring up MUIC device.
  29  * If user don't set some initial value for MUIC device through platform data,
  30  * extcon-max77693 driver use 'default_init_data' to bring up base operation
  31  * of MAX77693 MUIC device.
  32  */
  33 static struct max77693_reg_data default_init_data[] = {
  34         {
  35                 /* STATUS2 - [3]ChgDetRun */
  36                 .addr = MAX77693_MUIC_REG_STATUS2,
  37                 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
  38         }, {
  39                 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
  40                 .addr = MAX77693_MUIC_REG_INTMASK1,
  41                 .data = INTMASK1_ADC1K_MASK
  42                         | INTMASK1_ADC_MASK,
  43         }, {
  44                 /* INTMASK2 - Unmask [0]ChgTypM */
  45                 .addr = MAX77693_MUIC_REG_INTMASK2,
  46                 .data = INTMASK2_CHGTYP_MASK,
  47         }, {
  48                 /* INTMASK3 - Mask all of interrupts */
  49                 .addr = MAX77693_MUIC_REG_INTMASK3,
  50                 .data = 0x0,
  51         }, {
  52                 /* CDETCTRL2 */
  53                 .addr = MAX77693_MUIC_REG_CDETCTRL2,
  54                 .data = CDETCTRL2_VIDRMEN_MASK
  55                         | CDETCTRL2_DXOVPEN_MASK,
  56         },
  57 };
  58
  59 enum max77693_muic_adc_debounce_time {
  60         ADC_DEBOUNCE_TIME_5MS = 0,
  61         ADC_DEBOUNCE_TIME_10MS,
  62         ADC_DEBOUNCE_TIME_25MS,
  63         ADC_DEBOUNCE_TIME_38_62MS,
  64 };
  65
  66 struct max77693_muic_info {
  67         struct device *dev;
  68         struct max77693_dev *max77693;
  69         struct extcon_dev *edev;
  70         int prev_cable_type;
  71         int prev_cable_type_gnd;
  72         int prev_chg_type;
  73         int prev_button_type;
  74         u8 status[2];
  75
  76         int irq;
  77         struct work_struct irq_work;
  78         struct mutex mutex;
  79
  80         /*
  81          * Use delayed workqueue to detect cable state and then
  82          * notify cable state to notifiee/platform through uevent.
  83          * After completing the booting of platform, the extcon provider
  84          * driver should notify cable state to upper layer.
  85          */
  86         struct delayed_work wq_detcable;
  87
  88         /* Button of dock device */
  89         struct input_dev *dock;
  90
  91         /*
  92          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
  93          * h/w path of COMP2/COMN1 on CONTROL1 register.
  94          */
  95         int path_usb;
  96         int path_uart;
  97 };
  98
  99 enum max77693_muic_cable_group {
 100         MAX77693_CABLE_GROUP_ADC = 0,
 101         MAX77693_CABLE_GROUP_ADC_GND,
 102         MAX77693_CABLE_GROUP_CHG,
 103         MAX77693_CABLE_GROUP_VBVOLT,
 104 };
 105
 106 enum max77693_muic_charger_type {
 107         MAX77693_CHARGER_TYPE_NONE = 0,
 108         MAX77693_CHARGER_TYPE_USB,
 109         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
 110         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
 111         MAX77693_CHARGER_TYPE_APPLE_500MA,
 112         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
 113         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
 114 };
 115
 116 /**
 117  * struct max77693_muic_irq
 118  * @irq: the index of irq list of MUIC device.
 119  * @name: the name of irq.
 120  * @virq: the virtual irq to use irq domain
 121  */
 122 struct max77693_muic_irq {
 123         unsigned int irq;
 124         const char *name;
 125         unsigned int virq;
 126 };
 127
 128 static struct max77693_muic_irq muic_irqs[] = {
 129         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
 130         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
 131         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
 132         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
 133         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
 134         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
 135         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
 136         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
 137         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
 138         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
 139         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
 140         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
 141         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
 142         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
 143         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
 144         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
 145 };
 146
 147 /* Define supported accessory type */
 148 enum max77693_muic_acc_type {
 149         MAX77693_MUIC_ADC_GROUND = 0x0,
 150         MAX77693_MUIC_ADC_SEND_END_BUTTON,
 151         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
 152         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
 153         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
 154         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
 155         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
 156         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
 157         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
 158         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
 159         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
 160         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
 161         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
 162         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
 163         MAX77693_MUIC_ADC_RESERVED_ACC_1,
 164         MAX77693_MUIC_ADC_RESERVED_ACC_2,
 165         MAX77693_MUIC_ADC_RESERVED_ACC_3,
 166         MAX77693_MUIC_ADC_RESERVED_ACC_4,
 167         MAX77693_MUIC_ADC_RESERVED_ACC_5,
 168         MAX77693_MUIC_ADC_CEA936_AUDIO,
 169         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
 170         MAX77693_MUIC_ADC_TTY_CONVERTER,
 171         MAX77693_MUIC_ADC_UART_CABLE,
 172         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
 173         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
 174         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
 175         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
 176         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
 177         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
 178         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
 179         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
 180         MAX77693_MUIC_ADC_OPEN,
 181
 182         /*
 183          * The below accessories have same ADC value so ADCLow and
 184          * ADC1K bit is used to separate specific accessory.
 185          */
 186                                                 /* ADC|VBVolot|ADCLow|ADC1K| */
 187         MAX77693_MUIC_GND_USB_HOST = 0x100,     /* 0x0|      0|     0|    0| */
 188         MAX77693_MUIC_GND_USB_HOST_VB = 0x104,  /* 0x0|      1|     0|    0| */
 189         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
 190         MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
 191         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
 192 };
 193
 194 /*
 195  * MAX77693 MUIC device support below list of accessories(external connector)
 196  */
 197 static const unsigned int max77693_extcon_cable[] = {
 198         EXTCON_USB,
 199         EXTCON_USB_HOST,
 200         EXTCON_CHG_USB_SDP,
 201         EXTCON_CHG_USB_DCP,
 202         EXTCON_CHG_USB_FAST,
 203         EXTCON_CHG_USB_SLOW,
 204         EXTCON_CHG_USB_CDP,
 205         EXTCON_DISP_MHL,
 206         EXTCON_JIG,
 207         EXTCON_DOCK,
 208         EXTCON_NONE,
 209 };
 210
 211 /*
 212  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 213  * @info: the instance including private data of max77693 MUIC
 214  * @time: the debounce time of ADC
 215  */
 216 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 217                 enum max77693_muic_adc_debounce_time time)
 218 {
 219         int ret;
 220
 221         switch (time) {
 222         case ADC_DEBOUNCE_TIME_5MS:
 223         case ADC_DEBOUNCE_TIME_10MS:
 224         case ADC_DEBOUNCE_TIME_25MS:
 225         case ADC_DEBOUNCE_TIME_38_62MS:
 226                 /*
 227                  * Don't touch BTLDset, JIGset when you want to change adc
 228                  * debounce time. If it writes other than 0 to BTLDset, JIGset
 229                  * muic device will be reset and loose current state.
 230                  */
 231                 ret = regmap_write(info->max77693->regmap_muic,
 232                                   MAX77693_MUIC_REG_CTRL3,
 233                                   time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
 234                 if (ret) {
 235                         dev_err(info->dev, "failed to set ADC debounce time\n");
 236                         return ret;
 237                 }
 238                 break;
 239         default:
 240                 dev_err(info->dev, "invalid ADC debounce time\n");
 241                 return -EINVAL;
 242         }
 243
 244         return 0;
 245 };
 246
 247 /*
 248  * max77693_muic_set_path - Set hardware line according to attached cable
 249  * @info: the instance including private data of max77693 MUIC
 250  * @value: the path according to attached cable
 251  * @attached: the state of cable (true:attached, false:detached)
 252  *
 253  * The max77693 MUIC device share outside H/W line among a varity of cables
 254  * so, this function set internal path of H/W line according to the type of
 255  * attached cable.
 256  */
 257 static int max77693_muic_set_path(struct max77693_muic_info *info,
 258                 u8 val, bool attached)
 259 {
 260         int ret;
 261         unsigned int ctrl1, ctrl2 = 0;
 262
 263         if (attached)
 264                 ctrl1 = val;
 265         else
 266                 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
 267
 268         ret = regmap_update_bits(info->max77693->regmap_muic,
 269                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 270         if (ret < 0) {
 271                 dev_err(info->dev, "failed to update MUIC register\n");
 272                 return ret;
 273         }
 274
 275         if (attached)
 276                 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK;   /* LowPwr=0, CPEn=1 */
 277         else
 278                 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
 279
 280         ret = regmap_update_bits(info->max77693->regmap_muic,
 281                         MAX77693_MUIC_REG_CTRL2,
 282                         MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
 283                         ctrl2);
 284         if (ret < 0) {
 285                 dev_err(info->dev, "failed to update MUIC register\n");
 286                 return ret;
 287         }
 288
 289         dev_info(info->dev,
 290                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 291                 ctrl1, ctrl2, attached ? "attached" : "detached");
 292
 293         return 0;
 294 }
 295
 296 /*
 297  * max77693_muic_get_cable_type - Return cable type and check cable state
 298  * @info: the instance including private data of max77693 MUIC
 299  * @group: the path according to attached cable
 300  * @attached: store cable state and return
 301  *
 302  * This function check the cable state either attached or detached,
 303  * and then divide precise type of cable according to cable group.
 304  *      - MAX77693_CABLE_GROUP_ADC
 305  *      - MAX77693_CABLE_GROUP_ADC_GND
 306  *      - MAX77693_CABLE_GROUP_CHG
 307  *      - MAX77693_CABLE_GROUP_VBVOLT
 308  */
 309 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 310                 enum max77693_muic_cable_group group, bool *attached)
 311 {
 312         int cable_type = 0;
 313         int adc;
 314         int adc1k;
 315         int adclow;
 316         int vbvolt;
 317         int chg_type;
 318
 319         switch (group) {
 320         case MAX77693_CABLE_GROUP_ADC:
 321                 /*
 322                  * Read ADC value to check cable type and decide cable state
 323                  * according to cable type
 324                  */
 325                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 326                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 327
 328                 /*
 329                  * Check current cable state/cable type and store cable type
 330                  * (info->prev_cable_type) for handling cable when cable is
 331                  * detached.
 332                  */
 333                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 334                         *attached = false;
 335
 336                         cable_type = info->prev_cable_type;
 337                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 338                 } else {
 339                         *attached = true;
 340
 341                         cable_type = info->prev_cable_type = adc;
 342                 }
 343                 break;
 344         case MAX77693_CABLE_GROUP_ADC_GND:
 345                 /*
 346                  * Read ADC value to check cable type and decide cable state
 347                  * according to cable type
 348                  */
 349                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 350                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 351
 352                 /*
 353                  * Check current cable state/cable type and store cable type
 354                  * (info->prev_cable_type/_gnd) for handling cable when cable
 355                  * is detached.
 356                  */
 357                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 358                         *attached = false;
 359
 360                         cable_type = info->prev_cable_type_gnd;
 361                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 362                 } else {
 363                         *attached = true;
 364
 365                         adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
 366                         adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
 367                         adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
 368                         adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
 369
 370                         vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 371                         vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 372
 373                         /**
 374                          * [0x1|VBVolt|ADCLow|ADC1K]
 375                          * [0x1|     0|     0|    0] USB_HOST
 376                          * [0x1|     1|     0|    0] USB_HSOT_VB
 377                          * [0x1|     0|     1|    0] Audio Video cable with load
 378                          * [0x1|     0|     1|    1] MHL without charging cable
 379                          * [0x1|     1|     1|    1] MHL with charging cable
 380                          */
 381                         cable_type = ((0x1 << 8)
 382                                         | (vbvolt << 2)
 383                                         | (adclow << 1)
 384                                         | adc1k);
 385
 386                         info->prev_cable_type = adc;
 387                         info->prev_cable_type_gnd = cable_type;
 388                 }
 389
 390                 break;
 391         case MAX77693_CABLE_GROUP_CHG:
 392                 /*
 393                  * Read charger type to check cable type and decide cable state
 394                  * according to type of charger cable.
 395                  */
 396                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 397                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 398
 399                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 400                         *attached = false;
 401
 402                         cable_type = info->prev_chg_type;
 403                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 404                 } else {
 405                         *attached = true;
 406
 407                         /*
 408                          * Check current cable state/cable type and store cable
 409                          * type(info->prev_chg_type) for handling cable when
 410                          * charger cable is detached.
 411                          */
 412                         cable_type = info->prev_chg_type = chg_type;
 413                 }
 414
 415                 break;
 416         case MAX77693_CABLE_GROUP_VBVOLT:
 417                 /*
 418                  * Read ADC value to check cable type and decide cable state
 419                  * according to cable type
 420                  */
 421                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 422                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 423                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 424                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 425
 426                 if (adc == MAX77693_MUIC_ADC_OPEN
 427                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 428                         *attached = false;
 429                 else
 430                         *attached = true;
 431
 432                 /*
 433                  * Read vbvolt field, if vbvolt is 1,
 434                  * this cable is used for charging.
 435                  */
 436                 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 437                 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 438
 439                 cable_type = vbvolt;
 440                 break;
 441         default:
 442                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 443                 cable_type = -EINVAL;
 444                 break;
 445         }
 446
 447         return cable_type;
 448 }
 449
 450 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 451                 int cable_type, bool attached)
 452 {
 453         int ret = 0;
 454         int vbvolt;
 455         bool cable_attached;
 456         unsigned int dock_id;
 457
 458         dev_info(info->dev,
 459                 "external connector is %s (adc:0x%02x)\n",
 460                 attached ? "attached" : "detached", cable_type);
 461
 462         switch (cable_type) {
 463         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 464                 /*
 465                  * Check power cable whether attached or detached state.
 466                  * The Dock-Smart device need surely external power supply.
 467                  * If power cable(USB/TA) isn't connected to Dock device,
 468                  * user can't use Dock-Smart for desktop mode.
 469                  */
 470                 vbvolt = max77693_muic_get_cable_type(info,
 471                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 472                 if (attached && !vbvolt) {
 473                         dev_warn(info->dev,
 474                                 "Cannot detect external power supply\n");
 475                         return 0;
 476                 }
 477
 478                 /*
 479                  * Notify Dock/MHL state.
 480                  * - Dock device include three type of cable which
 481                  * are HDMI, USB for mouse/keyboard and micro-usb port
 482                  * for USB/TA cable. Dock device need always exteranl
 483                  * power supply(USB/TA cable through micro-usb cable). Dock
 484                  * device support screen output of target to separate
 485                  * monitor and mouse/keyboard for desktop mode.
 486                  *
 487                  * Features of 'USB/TA cable with Dock device'
 488                  * - Support MHL
 489                  * - Support external output feature of audio
 490                  * - Support charging through micro-usb port without data
 491                  *           connection if TA cable is connected to target.
 492                  * - Support charging and data connection through micro-usb port
 493                  *           if USB cable is connected between target and host
 494                  *           device.
 495                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 496                  */
 497                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 498                 if (ret < 0)
 499                         return ret;
 500
 501                 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
 502                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 503                 goto out;
 504         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 505                 dock_id = EXTCON_DOCK;
 506                 break;
 507         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 508                 dock_id = EXTCON_DOCK;
 509                 if (!attached) {
 510                         extcon_set_state_sync(info->edev, EXTCON_USB, false);
 511                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 512                                                 false);
 513                 }
 514                 break;
 515         default:
 516                 dev_err(info->dev, "failed to detect %s dock device\n",
 517                         attached ? "attached" : "detached");
 518                 return -EINVAL;
 519         }
 520
 521         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 522         ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 523                                         attached);
 524         if (ret < 0)
 525                 return ret;
 526         extcon_set_state_sync(info->edev, dock_id, attached);
 527
 528 out:
 529         return 0;
 530 }
 531
 532 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 533                 int button_type, bool attached)
 534 {
 535         struct input_dev *dock = info->dock;
 536         unsigned int code;
 537
 538         switch (button_type) {
 539         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 540                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 541                 /* DOCK_KEY_PREV */
 542                 code = KEY_PREVIOUSSONG;
 543                 break;
 544         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 545                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 546                 /* DOCK_KEY_NEXT */
 547                 code = KEY_NEXTSONG;
 548                 break;
 549         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 550                 /* DOCK_VOL_DOWN */
 551                 code = KEY_VOLUMEDOWN;
 552                 break;
 553         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 554                 /* DOCK_VOL_UP */
 555                 code = KEY_VOLUMEUP;
 556                 break;
 557         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 558                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 559                 /* DOCK_KEY_PLAY_PAUSE */
 560                 code = KEY_PLAYPAUSE;
 561                 break;
 562         default:
 563                 dev_err(info->dev,
 564                         "failed to detect %s key (adc:0x%x)\n",
 565                         attached ? "pressed" : "released", button_type);
 566                 return -EINVAL;
 567         }
 568
 569         input_event(dock, EV_KEY, code, attached);
 570         input_sync(dock);
 571
 572         return 0;
 573 }
 574
 575 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 576 {
 577         int cable_type_gnd;
 578         int ret = 0;
 579         bool attached;
 580
 581         cable_type_gnd = max77693_muic_get_cable_type(info,
 582                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 583
 584         switch (cable_type_gnd) {
 585         case MAX77693_MUIC_GND_USB_HOST:
 586         case MAX77693_MUIC_GND_USB_HOST_VB:
 587                 /* USB_HOST, PATH: AP_USB */
 588                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
 589                                                 attached);
 590                 if (ret < 0)
 591                         return ret;
 592                 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
 593                 break;
 594         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 595                 /* Audio Video Cable with load, PATH:AUDIO */
 596                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 597                                                 attached);
 598                 if (ret < 0)
 599                         return ret;
 600                 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
 601                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 602                                         attached);
 603                 break;
 604         case MAX77693_MUIC_GND_MHL:
 605         case MAX77693_MUIC_GND_MHL_VB:
 606                 /* MHL or MHL with USB/TA cable */
 607                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 608                 break;
 609         default:
 610                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 611                         attached ? "attached" : "detached");
 612                 return -EINVAL;
 613         }
 614
 615         return 0;
 616 }
 617
 618 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 619                 int cable_type, bool attached)
 620 {
 621         int ret = 0;
 622         u8 path = MAX77693_CONTROL1_SW_OPEN;
 623
 624         dev_info(info->dev,
 625                 "external connector is %s (adc:0x%02x)\n",
 626                 attached ? "attached" : "detached", cable_type);
 627
 628         switch (cable_type) {
 629         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 630         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 631                 /* PATH:AP_USB */
 632                 path = MAX77693_CONTROL1_SW_USB;
 633                 break;
 634         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 635         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 636                 /* PATH:AP_UART */
 637                 path = MAX77693_CONTROL1_SW_UART;
 638                 break;
 639         default:
 640                 dev_err(info->dev, "failed to detect %s jig cable\n",
 641                         attached ? "attached" : "detached");
 642                 return -EINVAL;
 643         }
 644
 645         ret = max77693_muic_set_path(info, path, attached);
 646         if (ret < 0)
 647                 return ret;
 648
 649         extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
 650
 651         return 0;
 652 }
 653
 654 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 655 {
 656         int cable_type;
 657         int button_type;
 658         bool attached;
 659         int ret = 0;
 660
 661         /* Check accessory state which is either detached or attached */
 662         cable_type = max77693_muic_get_cable_type(info,
 663                                 MAX77693_CABLE_GROUP_ADC, &attached);
 664
 665         dev_info(info->dev,
 666                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 667                 attached ? "attached" : "detached", cable_type,
 668                 info->prev_cable_type);
 669
 670         switch (cable_type) {
 671         case MAX77693_MUIC_ADC_GROUND:
 672                 /* USB_HOST/MHL/Audio */
 673                 max77693_muic_adc_ground_handler(info);
 674                 break;
 675         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 676         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 677         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 678         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 679                 /* JIG */
 680                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 681                 if (ret < 0)
 682                         return ret;
 683                 break;
 684         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 685         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 686         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 687                 /*
 688                  * DOCK device
 689                  *
 690                  * The MAX77693 MUIC device can detect total 34 cable type
 691                  * except of charger cable and MUIC device didn't define
 692                  * specfic role of cable in the range of from 0x01 to 0x12
 693                  * of ADC value. So, can use/define cable with no role according
 694                  * to schema of hardware board.
 695                  */
 696                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 697                 if (ret < 0)
 698                         return ret;
 699                 break;
 700         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 701         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 702         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 703         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 704         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 705                 /*
 706                  * Button of DOCK device
 707                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 708                  *
 709                  * The MAX77693 MUIC device can detect total 34 cable type
 710                  * except of charger cable and MUIC device didn't define
 711                  * specfic role of cable in the range of from 0x01 to 0x12
 712                  * of ADC value. So, can use/define cable with no role according
 713                  * to schema of hardware board.
 714                  */
 715                 if (attached)
 716                         button_type = info->prev_button_type = cable_type;
 717                 else
 718                         button_type = info->prev_button_type;
 719
 720                 ret = max77693_muic_dock_button_handler(info, button_type,
 721                                                         attached);
 722                 if (ret < 0)
 723                         return ret;
 724                 break;
 725         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 726         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 727         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 728         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 729         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 730         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 731         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 732         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 733         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 734         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 735         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 736         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 737         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 738         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 739         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 740         case MAX77693_MUIC_ADC_UART_CABLE:
 741         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 742         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 743                 /*
 744                  * This accessory isn't used in general case if it is specially
 745                  * needed to detect additional accessory, should implement
 746                  * proper operation when this accessory is attached/detached.
 747                  */
 748                 dev_info(info->dev,
 749                         "accessory is %s but it isn't used (adc:0x%x)\n",
 750                         attached ? "attached" : "detached", cable_type);
 751                 return -EAGAIN;
 752         default:
 753                 dev_err(info->dev,
 754                         "failed to detect %s accessory (adc:0x%x)\n",
 755                         attached ? "attached" : "detached", cable_type);
 756                 return -EINVAL;
 757         }
 758
 759         return 0;
 760 }
 761
 762 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 763 {
 764         int chg_type;
 765         int cable_type_gnd;
 766         int cable_type;
 767         bool attached;
 768         bool cable_attached;
 769         int ret = 0;
 770
 771         chg_type = max77693_muic_get_cable_type(info,
 772                                 MAX77693_CABLE_GROUP_CHG, &attached);
 773
 774         dev_info(info->dev,
 775                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 776                         attached ? "attached" : "detached",
 777                         chg_type, info->prev_chg_type);
 778
 779         switch (chg_type) {
 780         case MAX77693_CHARGER_TYPE_USB:
 781         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 782         case MAX77693_CHARGER_TYPE_NONE:
 783                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 784                 cable_type_gnd = max77693_muic_get_cable_type(info,
 785                                         MAX77693_CABLE_GROUP_ADC_GND,
 786                                         &cable_attached);
 787                 switch (cable_type_gnd) {
 788                 case MAX77693_MUIC_GND_MHL:
 789                 case MAX77693_MUIC_GND_MHL_VB:
 790                         /*
 791                          * MHL cable with USB/TA cable
 792                          * - MHL cable include two port(HDMI line and separate
 793                          * micro-usb port. When the target connect MHL cable,
 794                          * extcon driver check whether USB/TA cable is
 795                          * connected. If USB/TA cable is connected, extcon
 796                          * driver notify state to notifiee for charging battery.
 797                          *
 798                          * Features of 'USB/TA with MHL cable'
 799                          * - Support MHL
 800                          * - Support charging through micro-usb port without
 801                          *   data connection
 802                          */
 803                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 804                                                 attached);
 805                         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
 806                                                 cable_attached);
 807                         break;
 808                 }
 809
 810                 /* Check MAX77693_CABLE_GROUP_ADC type */
 811                 cable_type = max77693_muic_get_cable_type(info,
 812                                         MAX77693_CABLE_GROUP_ADC,
 813                                         &cable_attached);
 814                 switch (cable_type) {
 815                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 816                         /*
 817                          * Dock-Audio device with USB/TA cable
 818                          * - Dock device include two port(Dock-Audio and micro-
 819                          * usb port). When the target connect Dock-Audio device,
 820                          * extcon driver check whether USB/TA cable is connected
 821                          * or not. If USB/TA cable is connected, extcon driver
 822                          * notify state to notifiee for charging battery.
 823                          *
 824                          * Features of 'USB/TA cable with Dock-Audio device'
 825                          * - Support external output feature of audio.
 826                          * - Support charging through micro-usb port without
 827                          *   data connection.
 828                          */
 829                         extcon_set_state_sync(info->edev, EXTCON_USB,
 830                                                 attached);
 831                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 832                                                 attached);
 833
 834                         if (!cable_attached)
 835                                 extcon_set_state_sync(info->edev, EXTCON_DOCK,
 836                                                         cable_attached);
 837                         break;
 838                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 839                         /*
 840                          * Dock-Smart device with USB/TA cable
 841                          * - Dock-Desk device include three type of cable which
 842                          * are HDMI, USB for mouse/keyboard and micro-usb port
 843                          * for USB/TA cable. Dock-Smart device need always
 844                          * exteranl power supply(USB/TA cable through micro-usb
 845                          * cable). Dock-Smart device support screen output of
 846                          * target to separate monitor and mouse/keyboard for
 847                          * desktop mode.
 848                          *
 849                          * Features of 'USB/TA cable with Dock-Smart device'
 850                          * - Support MHL
 851                          * - Support external output feature of audio
 852                          * - Support charging through micro-usb port without
 853                          *   data connection if TA cable is connected to target.
 854                          * - Support charging and data connection through micro-
 855                          *   usb port if USB cable is connected between target
 856                          *   and host device
 857                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 858                          */
 859                         ret = max77693_muic_set_path(info, info->path_usb,
 860                                                     attached);
 861                         if (ret < 0)
 862                                 return ret;
 863
 864                         extcon_set_state_sync(info->edev, EXTCON_DOCK,
 865                                                 attached);
 866                         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
 867                                                 attached);
 868                         break;
 869                 }
 870
 871                 /* Check MAX77693_CABLE_GROUP_CHG type */
 872                 switch (chg_type) {
 873                 case MAX77693_CHARGER_TYPE_NONE:
 874                         /*
 875                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 876                          * cable is attached, muic device happen below two irq.
 877                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 878                          *    MHL/Dock-Audio.
 879                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 880                          *    USB/TA cable connected to MHL or Dock-Audio.
 881                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 882                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 883                          *
 884                          * If user attach MHL (with USB/TA cable and immediately
 885                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 886                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
 887                          * connected state to target. But USB/TA cable isn't
 888                          * connected to target. The user be face with unusual
 889                          * action. So, driver should check this situation in
 890                          * spite of, that previous charger type is N/A.
 891                          */
 892                         break;
 893                 case MAX77693_CHARGER_TYPE_USB:
 894                         /* Only USB cable, PATH:AP_USB */
 895                         ret = max77693_muic_set_path(info, info->path_usb,
 896                                                     attached);
 897                         if (ret < 0)
 898                                 return ret;
 899
 900                         extcon_set_state_sync(info->edev, EXTCON_USB,
 901                                                 attached);
 902                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 903                                                 attached);
 904                         break;
 905                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 906                         /* Only TA cable */
 907                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 908                                                 attached);
 909                         break;
 910                 }
 911                 break;
 912         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 913                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
 914                                         attached);
 915                 break;
 916         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 917                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
 918                                         attached);
 919                 break;
 920         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 921                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
 922                                         attached);
 923                 break;
 924         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 925                 break;
 926         default:
 927                 dev_err(info->dev,
 928                         "failed to detect %s accessory (chg_type:0x%x)\n",
 929                         attached ? "attached" : "detached", chg_type);
 930                 return -EINVAL;
 931         }
 932
 933         return 0;
 934 }
 935
 936 static void max77693_muic_irq_work(struct work_struct *work)
 937 {
 938         struct max77693_muic_info *info = container_of(work,
 939                         struct max77693_muic_info, irq_work);
 940         int irq_type = -1;
 941         int i, ret = 0;
 942
 943         if (!info->edev)
 944                 return;
 945
 946         mutex_lock(&info->mutex);
 947
 948         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 949                 if (info->irq == muic_irqs[i].virq)
 950                         irq_type = muic_irqs[i].irq;
 951
 952         ret = regmap_bulk_read(info->max77693->regmap_muic,
 953                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 954         if (ret) {
 955                 dev_err(info->dev, "failed to read MUIC register\n");
 956                 mutex_unlock(&info->mutex);
 957                 return;
 958         }
 959
 960         switch (irq_type) {
 961         case MAX77693_MUIC_IRQ_INT1_ADC:
 962         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 963         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 964         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 965                 /*
 966                  * Handle all of accessory except for
 967                  * type of charger accessory.
 968                  */
 969                 ret = max77693_muic_adc_handler(info);
 970                 break;
 971         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 972         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 973         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 974         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 975         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 976         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 977                 /* Handle charger accessory */
 978                 ret = max77693_muic_chg_handler(info);
 979                 break;
 980         case MAX77693_MUIC_IRQ_INT3_EOC:
 981         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 982         case MAX77693_MUIC_IRQ_INT3_OVP:
 983         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 984         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 985         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 986                 break;
 987         default:
 988                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 989                                 irq_type);
 990                 mutex_unlock(&info->mutex);
 991                 return;
 992         }
 993
 994         if (ret < 0)
 995                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 996
 997         mutex_unlock(&info->mutex);
 998 }
 999
1000 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1001 {
1002         struct max77693_muic_info *info = data;
1003
1004         info->irq = irq;
1005         schedule_work(&info->irq_work);
1006
1007         return IRQ_HANDLED;
1008 }
1009
1010 static const struct regmap_config max77693_muic_regmap_config = {
1011         .reg_bits = 8,
1012         .val_bits = 8,
1013 };
1014
1015 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1016 {
1017         int ret = 0;
1018         int adc;
1019         int chg_type;
1020         bool attached;
1021
1022         mutex_lock(&info->mutex);
1023
1024         /* Read STATUSx register to detect accessory */
1025         ret = regmap_bulk_read(info->max77693->regmap_muic,
1026                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1027         if (ret) {
1028                 dev_err(info->dev, "failed to read MUIC register\n");
1029                 mutex_unlock(&info->mutex);
1030                 return ret;
1031         }
1032
1033         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1034                                         &attached);
1035         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1036                 ret = max77693_muic_adc_handler(info);
1037                 if (ret < 0) {
1038                         dev_err(info->dev, "Cannot detect accessory\n");
1039                         mutex_unlock(&info->mutex);
1040                         return ret;
1041                 }
1042         }
1043
1044         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1045                                         &attached);
1046         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1047                 ret = max77693_muic_chg_handler(info);
1048                 if (ret < 0) {
1049                         dev_err(info->dev, "Cannot detect charger accessory\n");
1050                         mutex_unlock(&info->mutex);
1051                         return ret;
1052                 }
1053         }
1054
1055         mutex_unlock(&info->mutex);
1056
1057         return 0;
1058 }
1059
1060 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1061 {
1062         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1063                                 struct max77693_muic_info, wq_detcable);
1064
1065         max77693_muic_detect_accessory(info);
1066 }
1067
1068 static int max77693_muic_probe(struct platform_device *pdev)
1069 {
1070         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1071         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1072         struct max77693_muic_info *info;
1073         struct max77693_reg_data *init_data;
1074         int num_init_data;
1075         int delay_jiffies;
1076         int cable_type;
1077         bool attached;
1078         int ret;
1079         int i;
1080         unsigned int id;
1081
1082         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1083                                    GFP_KERNEL);
1084         if (!info)
1085                 return -ENOMEM;
1086
1087         info->dev = &pdev->dev;
1088         info->max77693 = max77693;
1089         if (info->max77693->regmap_muic) {
1090                 dev_dbg(&pdev->dev, "allocate register map\n");
1091         } else {
1092                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1093                                                 info->max77693->i2c_muic,
1094                                                 &max77693_muic_regmap_config);
1095                 if (IS_ERR(info->max77693->regmap_muic)) {
1096                         ret = PTR_ERR(info->max77693->regmap_muic);
1097                         dev_err(max77693->dev,
1098                                 "failed to allocate register map: %d\n", ret);
1099                         return ret;
1100                 }
1101         }
1102
1103         /* Register input device for button of dock device */
1104         info->dock = devm_input_allocate_device(&pdev->dev);
1105         if (!info->dock) {
1106                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1107                 return -ENOMEM;
1108         }
1109         info->dock->name = "max77693-muic/dock";
1110         info->dock->phys = "max77693-muic/extcon";
1111         info->dock->dev.parent = &pdev->dev;
1112
1113         __set_bit(EV_REP, info->dock->evbit);
1114
1115         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1116         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1117         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1118         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1119         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1120
1121         ret = input_register_device(info->dock);
1122         if (ret < 0) {
1123                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1124                                 ret);
1125                 return ret;
1126         }
1127
1128         platform_set_drvdata(pdev, info);
1129         mutex_init(&info->mutex);
1130
1131         ret = devm_work_autocancel(&pdev->dev, &info->irq_work,
1132                                    max77693_muic_irq_work);
1133         if (ret)
1134                 return ret;
1135
1136         /* Support irq domain for MAX77693 MUIC device */
1137         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1138                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1139                 int virq;
1140
1141                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1142                                         muic_irq->irq);
1143                 if (virq <= 0)
1144                         return -EINVAL;
1145                 muic_irq->virq = virq;
1146
1147                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1148                                 max77693_muic_irq_handler,
1149                                 IRQF_NO_SUSPEND,
1150                                 muic_irq->name, info);
1151                 if (ret) {
1152                         dev_err(&pdev->dev,
1153                                 "failed: irq request (IRQ: %d, error :%d)\n",
1154                                 muic_irq->irq, ret);
1155                         return ret;
1156                 }
1157         }
1158
1159         /* Initialize extcon device */
1160         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1161                                               max77693_extcon_cable);
1162         if (IS_ERR(info->edev)) {
1163                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1164                 return PTR_ERR(info->edev);
1165         }
1166
1167         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1168         if (ret) {
1169                 dev_err(&pdev->dev, "failed to register extcon device\n");
1170                 return ret;
1171         }
1172
1173         /* Initialize MUIC register by using platform data or default data */
1174         if (pdata && pdata->muic_data) {
1175                 init_data = pdata->muic_data->init_data;
1176                 num_init_data = pdata->muic_data->num_init_data;
1177         } else {
1178                 init_data = default_init_data;
1179                 num_init_data = ARRAY_SIZE(default_init_data);
1180         }
1181
1182         for (i = 0; i < num_init_data; i++) {
1183                 regmap_write(info->max77693->regmap_muic,
1184                                 init_data[i].addr,
1185                                 init_data[i].data);
1186         }
1187
1188         if (pdata && pdata->muic_data) {
1189                 struct max77693_muic_platform_data *muic_pdata
1190                                                    = pdata->muic_data;
1191
1192                 /*
1193                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1194                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1195                  */
1196                 if (muic_pdata->path_uart)
1197                         info->path_uart = muic_pdata->path_uart;
1198                 else
1199                         info->path_uart = MAX77693_CONTROL1_SW_UART;
1200
1201                 if (muic_pdata->path_usb)
1202                         info->path_usb = muic_pdata->path_usb;
1203                 else
1204                         info->path_usb = MAX77693_CONTROL1_SW_USB;
1205
1206                 /*
1207                  * Default delay time for detecting cable state
1208                  * after certain time.
1209                  */
1210                 if (muic_pdata->detcable_delay_ms)
1211                         delay_jiffies =
1212                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1213                 else
1214                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1215         } else {
1216                 info->path_usb = MAX77693_CONTROL1_SW_USB;
1217                 info->path_uart = MAX77693_CONTROL1_SW_UART;
1218                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1219         }
1220
1221         /* Set initial path for UART when JIG is connected to get serial logs */
1222         ret = regmap_bulk_read(info->max77693->regmap_muic,
1223                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1224         if (ret) {
1225                 dev_err(info->dev, "failed to read MUIC register\n");
1226                 return ret;
1227         }
1228         cable_type = max77693_muic_get_cable_type(info,
1229                                            MAX77693_CABLE_GROUP_ADC, &attached);
1230         if (attached && (cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON ||
1231                          cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF))
1232                 max77693_muic_set_path(info, info->path_uart, true);
1233
1234         /* Check revision number of MUIC device*/
1235         ret = regmap_read(info->max77693->regmap_muic,
1236                         MAX77693_MUIC_REG_ID, &id);
1237         if (ret < 0) {
1238                 dev_err(&pdev->dev, "failed to read revision number\n");
1239                 return ret;
1240         }
1241         dev_info(info->dev, "device ID : 0x%x\n", id);
1242
1243         /* Set ADC debounce time */
1244         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1245
1246         /*
1247          * Detect accessory after completing the initialization of platform
1248          *
1249          * - Use delayed workqueue to detect cable state and then
1250          * notify cable state to notifiee/platform through uevent.
1251          * After completing the booting of platform, the extcon provider
1252          * driver should notify cable state to upper layer.
1253          */
1254         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1255         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1256                         delay_jiffies);
1257
1258         return ret;
1259 }
1260
1261 static struct platform_driver max77693_muic_driver = {
1262         .driver         = {
1263                 .name   = DEV_NAME,
1264         },
1265         .probe          = max77693_muic_probe,
1266 };
1267
1268 module_platform_driver(max77693_muic_driver);
1269
1270 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1271 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1272 MODULE_LICENSE("GPL");
1273 MODULE_ALIAS("platform:max77693-muic");