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 /*
  36  * Default value of MAX77693 register to bring up MUIC device.
  37  * If user don't set some initial value for MUIC device through platform data,
  38  * extcon-max77693 driver use 'default_init_data' to bring up base operation
  39  * of MAX77693 MUIC device.
  40  */
  41 static struct max77693_reg_data default_init_data[] = {
  42         {
  43                 /* STATUS2 - [3]ChgDetRun */
  44                 .addr = MAX77693_MUIC_REG_STATUS2,
  45                 .data = STATUS2_CHGDETRUN_MASK,
  46         }, {
  47                 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
  48                 .addr = MAX77693_MUIC_REG_INTMASK1,
  49                 .data = INTMASK1_ADC1K_MASK
  50                         | INTMASK1_ADC_MASK,
  51         }, {
  52                 /* INTMASK2 - Unmask [0]ChgTypM */
  53                 .addr = MAX77693_MUIC_REG_INTMASK2,
  54                 .data = INTMASK2_CHGTYP_MASK,
  55         }, {
  56                 /* INTMASK3 - Mask all of interrupts */
  57                 .addr = MAX77693_MUIC_REG_INTMASK3,
  58                 .data = 0x0,
  59         }, {
  60                 /* CDETCTRL2 */
  61                 .addr = MAX77693_MUIC_REG_CDETCTRL2,
  62                 .data = CDETCTRL2_VIDRMEN_MASK
  63                         | CDETCTRL2_DXOVPEN_MASK,
  64         },
  65 };
  66
  67 enum max77693_muic_adc_debounce_time {
  68         ADC_DEBOUNCE_TIME_5MS = 0,
  69         ADC_DEBOUNCE_TIME_10MS,
  70         ADC_DEBOUNCE_TIME_25MS,
  71         ADC_DEBOUNCE_TIME_38_62MS,
  72 };
  73
  74 struct max77693_muic_info {
  75         struct device *dev;
  76         struct max77693_dev *max77693;
  77         struct extcon_dev *edev;
  78         int prev_cable_type;
  79         int prev_cable_type_gnd;
  80         int prev_chg_type;
  81         int prev_button_type;
  82         u8 status[2];
  83
  84         int irq;
  85         struct work_struct irq_work;
  86         struct mutex mutex;
  87
  88         /*
  89          * Use delayed workqueue to detect cable state and then
  90          * notify cable state to notifiee/platform through uevent.
  91          * After completing the booting of platform, the extcon provider
  92          * driver should notify cable state to upper layer.
  93          */
  94         struct delayed_work wq_detcable;
  95
  96         /* Button of dock device */
  97         struct input_dev *dock;
  98
  99         /*
 100          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
 101          * h/w path of COMP2/COMN1 on CONTROL1 register.
 102          */
 103         int path_usb;
 104         int path_uart;
 105 };
 106
 107 enum max77693_muic_cable_group {
 108         MAX77693_CABLE_GROUP_ADC = 0,
 109         MAX77693_CABLE_GROUP_ADC_GND,
 110         MAX77693_CABLE_GROUP_CHG,
 111         MAX77693_CABLE_GROUP_VBVOLT,
 112 };
 113
 114 enum max77693_muic_charger_type {
 115         MAX77693_CHARGER_TYPE_NONE = 0,
 116         MAX77693_CHARGER_TYPE_USB,
 117         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
 118         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
 119         MAX77693_CHARGER_TYPE_APPLE_500MA,
 120         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
 121         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
 122 };
 123
 124 /**
 125  * struct max77693_muic_irq
 126  * @irq: the index of irq list of MUIC device.
 127  * @name: the name of irq.
 128  * @virq: the virtual irq to use irq domain
 129  */
 130 struct max77693_muic_irq {
 131         unsigned int irq;
 132         const char *name;
 133         unsigned int virq;
 134 };
 135
 136 static struct max77693_muic_irq muic_irqs[] = {
 137         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
 138         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
 139         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
 140         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
 141         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
 142         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
 143         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
 144         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
 145         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
 146         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
 147         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
 148         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
 149         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
 150         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
 151         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
 152         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
 153 };
 154
 155 /* Define supported accessory type */
 156 enum max77693_muic_acc_type {
 157         MAX77693_MUIC_ADC_GROUND = 0x0,
 158         MAX77693_MUIC_ADC_SEND_END_BUTTON,
 159         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
 160         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
 161         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
 162         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
 163         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
 164         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
 165         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
 166         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
 167         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
 168         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
 169         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
 170         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
 171         MAX77693_MUIC_ADC_RESERVED_ACC_1,
 172         MAX77693_MUIC_ADC_RESERVED_ACC_2,
 173         MAX77693_MUIC_ADC_RESERVED_ACC_3,
 174         MAX77693_MUIC_ADC_RESERVED_ACC_4,
 175         MAX77693_MUIC_ADC_RESERVED_ACC_5,
 176         MAX77693_MUIC_ADC_CEA936_AUDIO,
 177         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
 178         MAX77693_MUIC_ADC_TTY_CONVERTER,
 179         MAX77693_MUIC_ADC_UART_CABLE,
 180         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
 181         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
 182         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
 183         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
 184         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
 185         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
 186         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
 187         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
 188         MAX77693_MUIC_ADC_OPEN,
 189
 190         /* The below accessories have same ADC value so ADCLow and
 191            ADC1K bit is used to separate specific accessory */
 192                                                 /* ADC|VBVolot|ADCLow|ADC1K| */
 193         MAX77693_MUIC_GND_USB_HOST = 0x100,     /* 0x0|      0|     0|    0| */
 194         MAX77693_MUIC_GND_USB_HOST_VB = 0x104,  /* 0x0|      1|     0|    0| */
 195         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
 196         MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
 197         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
 198 };
 199
 200 /*
 201  * MAX77693 MUIC device support below list of accessories(external connector)
 202  */
 203 enum {
 204         EXTCON_CABLE_USB = 0,
 205         EXTCON_CABLE_USB_HOST,
 206         EXTCON_CABLE_TA,
 207         EXTCON_CABLE_FAST_CHARGER,
 208         EXTCON_CABLE_SLOW_CHARGER,
 209         EXTCON_CABLE_CHARGE_DOWNSTREAM,
 210         EXTCON_CABLE_MHL,
 211         EXTCON_CABLE_MHL_TA,
 212         EXTCON_CABLE_JIG,
 213         EXTCON_CABLE_DOCK,
 214
 215         _EXTCON_CABLE_NUM,
 216 };
 217
 218 static const char *max77693_extcon_cable[] = {
 219         [EXTCON_CABLE_USB]                      = "USB",
 220         [EXTCON_CABLE_USB_HOST]                 = "USB-Host",
 221         [EXTCON_CABLE_TA]                       = "TA",
 222         [EXTCON_CABLE_FAST_CHARGER]             = "Fast-charger",
 223         [EXTCON_CABLE_SLOW_CHARGER]             = "Slow-charger",
 224         [EXTCON_CABLE_CHARGE_DOWNSTREAM]        = "Charge-downstream",
 225         [EXTCON_CABLE_MHL]                      = "MHL",
 226         [EXTCON_CABLE_MHL_TA]                   = "MHL-TA",
 227         [EXTCON_CABLE_JIG]                      = "JIG",
 228         [EXTCON_CABLE_DOCK]                     = "DOCK",
 229
 230         NULL,
 231 };
 232
 233 /*
 234  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 235  * @info: the instance including private data of max77693 MUIC
 236  * @time: the debounce time of ADC
 237  */
 238 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 239                 enum max77693_muic_adc_debounce_time time)
 240 {
 241         int ret;
 242
 243         switch (time) {
 244         case ADC_DEBOUNCE_TIME_5MS:
 245         case ADC_DEBOUNCE_TIME_10MS:
 246         case ADC_DEBOUNCE_TIME_25MS:
 247         case ADC_DEBOUNCE_TIME_38_62MS:
 248                 /*
 249                  * Don't touch BTLDset, JIGset when you want to change adc
 250                  * debounce time. If it writes other than 0 to BTLDset, JIGset
 251                  * muic device will be reset and loose current state.
 252                  */
 253                 ret = regmap_write(info->max77693->regmap_muic,
 254                                   MAX77693_MUIC_REG_CTRL3,
 255                                   time << CONTROL3_ADCDBSET_SHIFT);
 256                 if (ret) {
 257                         dev_err(info->dev, "failed to set ADC debounce time\n");
 258                         return ret;
 259                 }
 260                 break;
 261         default:
 262                 dev_err(info->dev, "invalid ADC debounce time\n");
 263                 return -EINVAL;
 264         }
 265
 266         return 0;
 267 };
 268
 269 /*
 270  * max77693_muic_set_path - Set hardware line according to attached cable
 271  * @info: the instance including private data of max77693 MUIC
 272  * @value: the path according to attached cable
 273  * @attached: the state of cable (true:attached, false:detached)
 274  *
 275  * The max77693 MUIC device share outside H/W line among a varity of cables
 276  * so, this function set internal path of H/W line according to the type of
 277  * attached cable.
 278  */
 279 static int max77693_muic_set_path(struct max77693_muic_info *info,
 280                 u8 val, bool attached)
 281 {
 282         int ret = 0;
 283         unsigned int ctrl1, ctrl2 = 0;
 284
 285         if (attached)
 286                 ctrl1 = val;
 287         else
 288                 ctrl1 = CONTROL1_SW_OPEN;
 289
 290         ret = regmap_update_bits(info->max77693->regmap_muic,
 291                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 292         if (ret < 0) {
 293                 dev_err(info->dev, "failed to update MUIC register\n");
 294                 return ret;
 295         }
 296
 297         if (attached)
 298                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
 299         else
 300                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
 301
 302         ret = regmap_update_bits(info->max77693->regmap_muic,
 303                         MAX77693_MUIC_REG_CTRL2,
 304                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
 305         if (ret < 0) {
 306                 dev_err(info->dev, "failed to update MUIC register\n");
 307                 return ret;
 308         }
 309
 310         dev_info(info->dev,
 311                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 312                 ctrl1, ctrl2, attached ? "attached" : "detached");
 313
 314         return 0;
 315 }
 316
 317 /*
 318  * max77693_muic_get_cable_type - Return cable type and check cable state
 319  * @info: the instance including private data of max77693 MUIC
 320  * @group: the path according to attached cable
 321  * @attached: store cable state and return
 322  *
 323  * This function check the cable state either attached or detached,
 324  * and then divide precise type of cable according to cable group.
 325  *      - MAX77693_CABLE_GROUP_ADC
 326  *      - MAX77693_CABLE_GROUP_ADC_GND
 327  *      - MAX77693_CABLE_GROUP_CHG
 328  *      - MAX77693_CABLE_GROUP_VBVOLT
 329  */
 330 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 331                 enum max77693_muic_cable_group group, bool *attached)
 332 {
 333         int cable_type = 0;
 334         int adc;
 335         int adc1k;
 336         int adclow;
 337         int vbvolt;
 338         int chg_type;
 339
 340         switch (group) {
 341         case MAX77693_CABLE_GROUP_ADC:
 342                 /*
 343                  * Read ADC value to check cable type and decide cable state
 344                  * according to cable type
 345                  */
 346                 adc = info->status[0] & STATUS1_ADC_MASK;
 347                 adc >>= STATUS1_ADC_SHIFT;
 348
 349                 /*
 350                  * Check current cable state/cable type and store cable type
 351                  * (info->prev_cable_type) for handling cable when cable is
 352                  * detached.
 353                  */
 354                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 355                         *attached = false;
 356
 357                         cable_type = info->prev_cable_type;
 358                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 359                 } else {
 360                         *attached = true;
 361
 362                         cable_type = info->prev_cable_type = adc;
 363                 }
 364                 break;
 365         case MAX77693_CABLE_GROUP_ADC_GND:
 366                 /*
 367                  * Read ADC value to check cable type and decide cable state
 368                  * according to cable type
 369                  */
 370                 adc = info->status[0] & STATUS1_ADC_MASK;
 371                 adc >>= STATUS1_ADC_SHIFT;
 372
 373                 /*
 374                  * Check current cable state/cable type and store cable type
 375                  * (info->prev_cable_type/_gnd) for handling cable when cable
 376                  * is detached.
 377                  */
 378                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 379                         *attached = false;
 380
 381                         cable_type = info->prev_cable_type_gnd;
 382                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 383                 } else {
 384                         *attached = true;
 385
 386                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
 387                         adclow >>= STATUS1_ADCLOW_SHIFT;
 388                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
 389                         adc1k >>= STATUS1_ADC1K_SHIFT;
 390
 391                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 392                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
 393
 394                         /**
 395                          * [0x1|VBVolt|ADCLow|ADC1K]
 396                          * [0x1|     0|     0|    0] USB_HOST
 397                          * [0x1|     1|     0|    0] USB_HSOT_VB
 398                          * [0x1|     0|     1|    0] Audio Video cable with load
 399                          * [0x1|     0|     1|    1] MHL without charging cable
 400                          * [0x1|     1|     1|    1] MHL with charging cable
 401                          */
 402                         cable_type = ((0x1 << 8)
 403                                         | (vbvolt << 2)
 404                                         | (adclow << 1)
 405                                         | adc1k);
 406
 407                         info->prev_cable_type = adc;
 408                         info->prev_cable_type_gnd = cable_type;
 409                 }
 410
 411                 break;
 412         case MAX77693_CABLE_GROUP_CHG:
 413                 /*
 414                  * Read charger type to check cable type and decide cable state
 415                  * according to type of charger cable.
 416                  */
 417                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 418                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 419
 420                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 421                         *attached = false;
 422
 423                         cable_type = info->prev_chg_type;
 424                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 425                 } else {
 426                         *attached = true;
 427
 428                         /*
 429                          * Check current cable state/cable type and store cable
 430                          * type(info->prev_chg_type) for handling cable when
 431                          * charger cable is detached.
 432                          */
 433                         cable_type = info->prev_chg_type = chg_type;
 434                 }
 435
 436                 break;
 437         case MAX77693_CABLE_GROUP_VBVOLT:
 438                 /*
 439                  * Read ADC value to check cable type and decide cable state
 440                  * according to cable type
 441                  */
 442                 adc = info->status[0] & STATUS1_ADC_MASK;
 443                 adc >>= STATUS1_ADC_SHIFT;
 444                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 445                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 446
 447                 if (adc == MAX77693_MUIC_ADC_OPEN
 448                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 449                         *attached = false;
 450                 else
 451                         *attached = true;
 452
 453                 /*
 454                  * Read vbvolt field, if vbvolt is 1,
 455                  * this cable is used for charging.
 456                  */
 457                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 458                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
 459
 460                 cable_type = vbvolt;
 461                 break;
 462         default:
 463                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 464                 cable_type = -EINVAL;
 465                 break;
 466         }
 467
 468         return cable_type;
 469 }
 470
 471 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 472                 int cable_type, bool attached)
 473 {
 474         int ret = 0;
 475         int vbvolt;
 476         bool cable_attached;
 477         char dock_name[CABLE_NAME_MAX];
 478
 479         dev_info(info->dev,
 480                 "external connector is %s (adc:0x%02x)\n",
 481                 attached ? "attached" : "detached", cable_type);
 482
 483         switch (cable_type) {
 484         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 485                 /*
 486                  * Check power cable whether attached or detached state.
 487                  * The Dock-Smart device need surely external power supply.
 488                  * If power cable(USB/TA) isn't connected to Dock device,
 489                  * user can't use Dock-Smart for desktop mode.
 490                  */
 491                 vbvolt = max77693_muic_get_cable_type(info,
 492                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 493                 if (attached && !vbvolt) {
 494                         dev_warn(info->dev,
 495                                 "Cannot detect external power supply\n");
 496                         return 0;
 497                 }
 498
 499                 /*
 500                  * Notify Dock/MHL state.
 501                  * - Dock device include three type of cable which
 502                  * are HDMI, USB for mouse/keyboard and micro-usb port
 503                  * for USB/TA cable. Dock device need always exteranl
 504                  * power supply(USB/TA cable through micro-usb cable). Dock
 505                  * device support screen output of target to separate
 506                  * monitor and mouse/keyboard for desktop mode.
 507                  *
 508                  * Features of 'USB/TA cable with Dock device'
 509                  * - Support MHL
 510                  * - Support external output feature of audio
 511                  * - Support charging through micro-usb port without data
 512                  *           connection if TA cable is connected to target.
 513                  * - Support charging and data connection through micro-usb port
 514                  *           if USB cable is connected between target and host
 515                  *           device.
 516                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 517                  */
 518                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 519                 if (ret < 0)
 520                         return ret;
 521
 522                 extcon_set_cable_state(info->edev, "DOCK", attached);
 523                 extcon_set_cable_state(info->edev, "MHL", attached);
 524                 goto out;
 525         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 526                 strcpy(dock_name, "DOCK");
 527                 break;
 528         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 529                 strcpy(dock_name, "DOCK");
 530                 if (!attached)
 531                         extcon_set_cable_state(info->edev, "USB", false);
 532                 break;
 533         default:
 534                 dev_err(info->dev, "failed to detect %s dock device\n",
 535                         attached ? "attached" : "detached");
 536                 return -EINVAL;
 537         }
 538
 539         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 540         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 541         if (ret < 0)
 542                 return ret;
 543         extcon_set_cable_state(info->edev, dock_name, attached);
 544
 545 out:
 546         return 0;
 547 }
 548
 549 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 550                 int button_type, bool attached)
 551 {
 552         struct input_dev *dock = info->dock;
 553         unsigned int code;
 554
 555         switch (button_type) {
 556         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 557                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 558                 /* DOCK_KEY_PREV */
 559                 code = KEY_PREVIOUSSONG;
 560                 break;
 561         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 562                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 563                 /* DOCK_KEY_NEXT */
 564                 code = KEY_NEXTSONG;
 565                 break;
 566         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 567                 /* DOCK_VOL_DOWN */
 568                 code = KEY_VOLUMEDOWN;
 569                 break;
 570         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 571                 /* DOCK_VOL_UP */
 572                 code = KEY_VOLUMEUP;
 573                 break;
 574         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 575                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 576                 /* DOCK_KEY_PLAY_PAUSE */
 577                 code = KEY_PLAYPAUSE;
 578                 break;
 579         default:
 580                 dev_err(info->dev,
 581                         "failed to detect %s key (adc:0x%x)\n",
 582                         attached ? "pressed" : "released", button_type);
 583                 return -EINVAL;
 584         }
 585
 586         input_event(dock, EV_KEY, code, attached);
 587         input_sync(dock);
 588
 589         return 0;
 590 }
 591
 592 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 593 {
 594         int cable_type_gnd;
 595         int ret = 0;
 596         bool attached;
 597
 598         cable_type_gnd = max77693_muic_get_cable_type(info,
 599                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 600
 601         switch (cable_type_gnd) {
 602         case MAX77693_MUIC_GND_USB_HOST:
 603         case MAX77693_MUIC_GND_USB_HOST_VB:
 604                 /* USB_HOST, PATH: AP_USB */
 605                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 606                 if (ret < 0)
 607                         return ret;
 608                 extcon_set_cable_state(info->edev, "USB-Host", attached);
 609                 break;
 610         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 611                 /* Audio Video Cable with load, PATH:AUDIO */
 612                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 613                 if (ret < 0)
 614                         return ret;
 615                 extcon_set_cable_state(info->edev,
 616                                 "Audio-video-load", attached);
 617                 break;
 618         case MAX77693_MUIC_GND_MHL:
 619         case MAX77693_MUIC_GND_MHL_VB:
 620                 /* MHL or MHL with USB/TA cable */
 621                 extcon_set_cable_state(info->edev, "MHL", attached);
 622                 break;
 623         default:
 624                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 625                         attached ? "attached" : "detached");
 626                 return -EINVAL;
 627         }
 628
 629         return 0;
 630 }
 631
 632 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 633                 int cable_type, bool attached)
 634 {
 635         int ret = 0;
 636         u8 path = CONTROL1_SW_OPEN;
 637
 638         dev_info(info->dev,
 639                 "external connector is %s (adc:0x%02x)\n",
 640                 attached ? "attached" : "detached", cable_type);
 641
 642         switch (cable_type) {
 643         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 644         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 645                 /* PATH:AP_USB */
 646                 path = CONTROL1_SW_USB;
 647                 break;
 648         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 649         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 650                 /* PATH:AP_UART */
 651                 path = CONTROL1_SW_UART;
 652                 break;
 653         default:
 654                 dev_err(info->dev, "failed to detect %s jig cable\n",
 655                         attached ? "attached" : "detached");
 656                 return -EINVAL;
 657         }
 658
 659         ret = max77693_muic_set_path(info, path, attached);
 660         if (ret < 0)
 661                 return ret;
 662
 663         extcon_set_cable_state(info->edev, "JIG", attached);
 664
 665         return 0;
 666 }
 667
 668 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 669 {
 670         int cable_type;
 671         int button_type;
 672         bool attached;
 673         int ret = 0;
 674
 675         /* Check accessory state which is either detached or attached */
 676         cable_type = max77693_muic_get_cable_type(info,
 677                                 MAX77693_CABLE_GROUP_ADC, &attached);
 678
 679         dev_info(info->dev,
 680                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 681                 attached ? "attached" : "detached", cable_type,
 682                 info->prev_cable_type);
 683
 684         switch (cable_type) {
 685         case MAX77693_MUIC_ADC_GROUND:
 686                 /* USB_HOST/MHL/Audio */
 687                 max77693_muic_adc_ground_handler(info);
 688                 break;
 689         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 690         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 691         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 692         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 693                 /* JIG */
 694                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 695                 if (ret < 0)
 696                         return ret;
 697                 break;
 698         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 699         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 700         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 701                 /*
 702                  * DOCK device
 703                  *
 704                  * The MAX77693 MUIC device can detect total 34 cable type
 705                  * except of charger cable and MUIC device didn't define
 706                  * specfic role of cable in the range of from 0x01 to 0x12
 707                  * of ADC value. So, can use/define cable with no role according
 708                  * to schema of hardware board.
 709                  */
 710                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 711                 if (ret < 0)
 712                         return ret;
 713                 break;
 714         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 715         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 716         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 717         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 718         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 719                 /*
 720                  * Button of DOCK device
 721                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 722                  *
 723                  * The MAX77693 MUIC device can detect total 34 cable type
 724                  * except of charger cable and MUIC device didn't define
 725                  * specfic role of cable in the range of from 0x01 to 0x12
 726                  * of ADC value. So, can use/define cable with no role according
 727                  * to schema of hardware board.
 728                  */
 729                 if (attached)
 730                         button_type = info->prev_button_type = cable_type;
 731                 else
 732                         button_type = info->prev_button_type;
 733
 734                 ret = max77693_muic_dock_button_handler(info, button_type,
 735                                                         attached);
 736                 if (ret < 0)
 737                         return ret;
 738                 break;
 739         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 740         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 741         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 742         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 743         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 744         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 745         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 746         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 747         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 748         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 749         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 750         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 751         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 752         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 753         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 754         case MAX77693_MUIC_ADC_UART_CABLE:
 755         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 756         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 757                 /*
 758                  * This accessory isn't used in general case if it is specially
 759                  * needed to detect additional accessory, should implement
 760                  * proper operation when this accessory is attached/detached.
 761                  */
 762                 dev_info(info->dev,
 763                         "accessory is %s but it isn't used (adc:0x%x)\n",
 764                         attached ? "attached" : "detached", cable_type);
 765                 return -EAGAIN;
 766         default:
 767                 dev_err(info->dev,
 768                         "failed to detect %s accessory (adc:0x%x)\n",
 769                         attached ? "attached" : "detached", cable_type);
 770                 return -EINVAL;
 771         }
 772
 773         return 0;
 774 }
 775
 776 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 777 {
 778         int chg_type;
 779         int cable_type_gnd;
 780         int cable_type;
 781         bool attached;
 782         bool cable_attached;
 783         int ret = 0;
 784
 785         chg_type = max77693_muic_get_cable_type(info,
 786                                 MAX77693_CABLE_GROUP_CHG, &attached);
 787
 788         dev_info(info->dev,
 789                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 790                         attached ? "attached" : "detached",
 791                         chg_type, info->prev_chg_type);
 792
 793         switch (chg_type) {
 794         case MAX77693_CHARGER_TYPE_USB:
 795         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 796         case MAX77693_CHARGER_TYPE_NONE:
 797                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 798                 cable_type_gnd = max77693_muic_get_cable_type(info,
 799                                         MAX77693_CABLE_GROUP_ADC_GND,
 800                                         &cable_attached);
 801                 switch (cable_type_gnd) {
 802                 case MAX77693_MUIC_GND_MHL:
 803                 case MAX77693_MUIC_GND_MHL_VB:
 804                         /*
 805                          * MHL cable with MHL-TA(USB/TA) cable
 806                          * - MHL cable include two port(HDMI line and separate
 807                          * micro-usb port. When the target connect MHL cable,
 808                          * extcon driver check whether MHL-TA(USB/TA) cable is
 809                          * connected. If MHL-TA cable is connected, extcon
 810                          * driver notify state to notifiee for charging battery.
 811                          *
 812                          * Features of 'MHL-TA(USB/TA) with MHL cable'
 813                          * - Support MHL
 814                          * - Support charging through micro-usb port without
 815                          *   data connection
 816                          */
 817                         extcon_set_cable_state(info->edev, "MHL-TA", attached);
 818                         if (!cable_attached)
 819                                 extcon_set_cable_state(info->edev,
 820                                                       "MHL", cable_attached);
 821                         break;
 822                 }
 823
 824                 /* Check MAX77693_CABLE_GROUP_ADC type */
 825                 cable_type = max77693_muic_get_cable_type(info,
 826                                         MAX77693_CABLE_GROUP_ADC,
 827                                         &cable_attached);
 828                 switch (cable_type) {
 829                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 830                         /*
 831                          * Dock-Audio device with USB/TA cable
 832                          * - Dock device include two port(Dock-Audio and micro-
 833                          * usb port). When the target connect Dock-Audio device,
 834                          * extcon driver check whether USB/TA cable is connected
 835                          * or not. If USB/TA cable is connected, extcon driver
 836                          * notify state to notifiee for charging battery.
 837                          *
 838                          * Features of 'USB/TA cable with Dock-Audio device'
 839                          * - Support external output feature of audio.
 840                          * - Support charging through micro-usb port without
 841                          *   data connection.
 842                          */
 843                         extcon_set_cable_state(info->edev, "USB", attached);
 844
 845                         if (!cable_attached)
 846                                 extcon_set_cable_state(info->edev, "DOCK",
 847                                                       cable_attached);
 848                         break;
 849                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 850                         /*
 851                          * Dock-Smart device with USB/TA cable
 852                          * - Dock-Desk device include three type of cable which
 853                          * are HDMI, USB for mouse/keyboard and micro-usb port
 854                          * for USB/TA cable. Dock-Smart device need always
 855                          * exteranl power supply(USB/TA cable through micro-usb
 856                          * cable). Dock-Smart device support screen output of
 857                          * target to separate monitor and mouse/keyboard for
 858                          * desktop mode.
 859                          *
 860                          * Features of 'USB/TA cable with Dock-Smart device'
 861                          * - Support MHL
 862                          * - Support external output feature of audio
 863                          * - Support charging through micro-usb port without
 864                          *   data connection if TA cable is connected to target.
 865                          * - Support charging and data connection through micro-
 866                          *   usb port if USB cable is connected between target
 867                          *   and host device
 868                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 869                          */
 870                         ret = max77693_muic_set_path(info, info->path_usb,
 871                                                     attached);
 872                         if (ret < 0)
 873                                 return ret;
 874
 875                         extcon_set_cable_state(info->edev, "DOCK", attached);
 876                         extcon_set_cable_state(info->edev, "MHL", attached);
 877
 878                         break;
 879                 }
 880
 881                 /* Check MAX77693_CABLE_GROUP_CHG type */
 882                 switch (chg_type) {
 883                 case MAX77693_CHARGER_TYPE_NONE:
 884                         /*
 885                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 886                          * cable is attached, muic device happen below two irq.
 887                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 888                          *    MHL/Dock-Audio.
 889                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 890                          *    USB/TA cable connected to MHL or Dock-Audio.
 891                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 892                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 893                          *
 894                          * If user attach MHL (with USB/TA cable and immediately
 895                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 896                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
 897                          * connected state to target. But USB/TA cable isn't
 898                          * connected to target. The user be face with unusual
 899                          * action. So, driver should check this situation in
 900                          * spite of, that previous charger type is N/A.
 901                          */
 902                         break;
 903                 case MAX77693_CHARGER_TYPE_USB:
 904                         /* Only USB cable, PATH:AP_USB */
 905                         ret = max77693_muic_set_path(info, info->path_usb,
 906                                                     attached);
 907                         if (ret < 0)
 908                                 return ret;
 909
 910                         extcon_set_cable_state(info->edev, "USB", attached);
 911                         break;
 912                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 913                         /* Only TA cable */
 914                         extcon_set_cable_state(info->edev, "TA", attached);
 915                         break;
 916                 }
 917                 break;
 918         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 919                 extcon_set_cable_state(info->edev,
 920                                 "Charge-downstream", attached);
 921                 break;
 922         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 923                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
 924                 break;
 925         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 926                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
 927                 break;
 928         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 929                 break;
 930         default:
 931                 dev_err(info->dev,
 932                         "failed to detect %s accessory (chg_type:0x%x)\n",
 933                         attached ? "attached" : "detached", chg_type);
 934                 return -EINVAL;
 935         }
 936
 937         return 0;
 938 }
 939
 940 static void max77693_muic_irq_work(struct work_struct *work)
 941 {
 942         struct max77693_muic_info *info = container_of(work,
 943                         struct max77693_muic_info, irq_work);
 944         int irq_type = -1;
 945         int i, ret = 0;
 946
 947         if (!info->edev)
 948                 return;
 949
 950         mutex_lock(&info->mutex);
 951
 952         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 953                 if (info->irq == muic_irqs[i].virq)
 954                         irq_type = muic_irqs[i].irq;
 955
 956         ret = regmap_bulk_read(info->max77693->regmap_muic,
 957                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 958         if (ret) {
 959                 dev_err(info->dev, "failed to read MUIC register\n");
 960                 mutex_unlock(&info->mutex);
 961                 return;
 962         }
 963
 964         switch (irq_type) {
 965         case MAX77693_MUIC_IRQ_INT1_ADC:
 966         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 967         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 968         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 969                 /* Handle all of accessory except for
 970                    type of charger accessory */
 971                 ret = max77693_muic_adc_handler(info);
 972                 break;
 973         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 974         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 975         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 976         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 977         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 978         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 979                 /* Handle charger accessory */
 980                 ret = max77693_muic_chg_handler(info);
 981                 break;
 982         case MAX77693_MUIC_IRQ_INT3_EOC:
 983         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 984         case MAX77693_MUIC_IRQ_INT3_OVP:
 985         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 986         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 987         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 988                 break;
 989         default:
 990                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 991                                 irq_type);
 992                 mutex_unlock(&info->mutex);
 993                 return;
 994         }
 995
 996         if (ret < 0)
 997                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 998
 999         mutex_unlock(&info->mutex);
1000 }
1001
1002 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1003 {
1004         struct max77693_muic_info *info = data;
1005
1006         info->irq = irq;
1007         schedule_work(&info->irq_work);
1008
1009         return IRQ_HANDLED;
1010 }
1011
1012 static const struct regmap_config max77693_muic_regmap_config = {
1013         .reg_bits = 8,
1014         .val_bits = 8,
1015 };
1016
1017 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1018 {
1019         int ret = 0;
1020         int adc;
1021         int chg_type;
1022         bool attached;
1023
1024         mutex_lock(&info->mutex);
1025
1026         /* Read STATUSx register to detect accessory */
1027         ret = regmap_bulk_read(info->max77693->regmap_muic,
1028                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1029         if (ret) {
1030                 dev_err(info->dev, "failed to read MUIC register\n");
1031                 mutex_unlock(&info->mutex);
1032                 return ret;
1033         }
1034
1035         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1036                                         &attached);
1037         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1038                 ret = max77693_muic_adc_handler(info);
1039                 if (ret < 0) {
1040                         dev_err(info->dev, "Cannot detect accessory\n");
1041                         mutex_unlock(&info->mutex);
1042                         return ret;
1043                 }
1044         }
1045
1046         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1047                                         &attached);
1048         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1049                 ret = max77693_muic_chg_handler(info);
1050                 if (ret < 0) {
1051                         dev_err(info->dev, "Cannot detect charger accessory\n");
1052                         mutex_unlock(&info->mutex);
1053                         return ret;
1054                 }
1055         }
1056
1057         mutex_unlock(&info->mutex);
1058
1059         return 0;
1060 }
1061
1062 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1063 {
1064         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1065                                 struct max77693_muic_info, wq_detcable);
1066
1067         max77693_muic_detect_accessory(info);
1068 }
1069
1070 static int max77693_muic_probe(struct platform_device *pdev)
1071 {
1072         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1073         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1074         struct max77693_muic_info *info;
1075         struct max77693_reg_data *init_data;
1076         int num_init_data;
1077         int delay_jiffies;
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->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         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1132
1133         /* Support irq domain for MAX77693 MUIC device */
1134         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1135                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1136                 unsigned int virq = 0;
1137
1138                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1139                                         muic_irq->irq);
1140                 if (!virq)
1141                         return -EINVAL;
1142                 muic_irq->virq = virq;
1143
1144                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1145                                 max77693_muic_irq_handler,
1146                                 IRQF_NO_SUSPEND,
1147                                 muic_irq->name, info);
1148                 if (ret) {
1149                         dev_err(&pdev->dev,
1150                                 "failed: irq request (IRQ: %d, error :%d)\n",
1151                                 muic_irq->irq, ret);
1152                         return ret;
1153                 }
1154         }
1155
1156         /* Initialize extcon device */
1157         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1158                                               max77693_extcon_cable);
1159         if (IS_ERR(info->edev)) {
1160                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1161                 return -ENOMEM;
1162         }
1163         info->edev->name = DEV_NAME;
1164
1165         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1166         if (ret) {
1167                 dev_err(&pdev->dev, "failed to register extcon device\n");
1168                 return ret;
1169         }
1170
1171         /* Initialize MUIC register by using platform data or default data */
1172         if (pdata && pdata->muic_data) {
1173                 init_data = pdata->muic_data->init_data;
1174                 num_init_data = pdata->muic_data->num_init_data;
1175         } else {
1176                 init_data = default_init_data;
1177                 num_init_data = ARRAY_SIZE(default_init_data);
1178         }
1179
1180         for (i = 0; i < num_init_data; i++) {
1181                 enum max77693_irq_source irq_src
1182                                 = MAX77693_IRQ_GROUP_NR;
1183
1184                 regmap_write(info->max77693->regmap_muic,
1185                                 init_data[i].addr,
1186                                 init_data[i].data);
1187
1188                 switch (init_data[i].addr) {
1189                 case MAX77693_MUIC_REG_INTMASK1:
1190                         irq_src = MUIC_INT1;
1191                         break;
1192                 case MAX77693_MUIC_REG_INTMASK2:
1193                         irq_src = MUIC_INT2;
1194                         break;
1195                 case MAX77693_MUIC_REG_INTMASK3:
1196                         irq_src = MUIC_INT3;
1197                         break;
1198                 }
1199
1200                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1201                         info->max77693->irq_masks_cur[irq_src]
1202                                 = init_data[i].data;
1203         }
1204
1205         if (pdata && pdata->muic_data) {
1206                 struct max77693_muic_platform_data *muic_pdata
1207                                                    = pdata->muic_data;
1208
1209                 /*
1210                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1211                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1212                  */
1213                 if (muic_pdata->path_uart)
1214                         info->path_uart = muic_pdata->path_uart;
1215                 else
1216                         info->path_uart = CONTROL1_SW_UART;
1217
1218                 if (muic_pdata->path_usb)
1219                         info->path_usb = muic_pdata->path_usb;
1220                 else
1221                         info->path_usb = CONTROL1_SW_USB;
1222
1223                 /*
1224                  * Default delay time for detecting cable state
1225                  * after certain time.
1226                  */
1227                 if (muic_pdata->detcable_delay_ms)
1228                         delay_jiffies =
1229                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1230                 else
1231                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1232         } else {
1233                 info->path_usb = CONTROL1_SW_USB;
1234                 info->path_uart = CONTROL1_SW_UART;
1235                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1236         }
1237
1238         /* Set initial path for UART */
1239          max77693_muic_set_path(info, info->path_uart, true);
1240
1241         /* Check revision number of MUIC device*/
1242         ret = regmap_read(info->max77693->regmap_muic,
1243                         MAX77693_MUIC_REG_ID, &id);
1244         if (ret < 0) {
1245                 dev_err(&pdev->dev, "failed to read revision number\n");
1246                 return ret;
1247         }
1248         dev_info(info->dev, "device ID : 0x%x\n", id);
1249
1250         /* Set ADC debounce time */
1251         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1252
1253         /*
1254          * Detect accessory after completing the initialization of platform
1255          *
1256          * - Use delayed workqueue to detect cable state and then
1257          * notify cable state to notifiee/platform through uevent.
1258          * After completing the booting of platform, the extcon provider
1259          * driver should notify cable state to upper layer.
1260          */
1261         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1262         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1263                         delay_jiffies);
1264
1265         return ret;
1266 }
1267
1268 static int max77693_muic_remove(struct platform_device *pdev)
1269 {
1270         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1271
1272         cancel_work_sync(&info->irq_work);
1273         input_unregister_device(info->dock);
1274
1275         return 0;
1276 }
1277
1278 static struct platform_driver max77693_muic_driver = {
1279         .driver         = {
1280                 .name   = DEV_NAME,
1281         },
1282         .probe          = max77693_muic_probe,
1283         .remove         = max77693_muic_remove,
1284 };
1285
1286 module_platform_driver(max77693_muic_driver);
1287
1288 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1289 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1290 MODULE_LICENSE("GPL");
1291 MODULE_ALIAS("platform:extcon-max77693");