drivers/extcon/extcon-sm5502.c

   1 /*
   2  * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
   3  *
   4  * Copyright (c) 2014 Samsung Electronics Co., Ltd
   5  * Author: Chanwoo Choi <cw00.choi@samsung.com>
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <linux/err.h>
  14 #include <linux/i2c.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/irqdomain.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/regmap.h>
  21 #include <linux/slab.h>
  22 #include <linux/extcon.h>
  23
  24 #include "extcon-sm5502.h"
  25
  26 #define DELAY_MS_DEFAULT                17000   /* unit: millisecond */
  27
  28 struct muic_irq {
  29         unsigned int irq;
  30         const char *name;
  31         unsigned int virq;
  32 };
  33
  34 struct reg_data {
  35         u8 reg;
  36         unsigned int val;
  37         bool invert;
  38 };
  39
  40 struct sm5502_muic_info {
  41         struct device *dev;
  42         struct extcon_dev *edev;
  43
  44         struct i2c_client *i2c;
  45         struct regmap *regmap;
  46
  47         struct regmap_irq_chip_data *irq_data;
  48         struct muic_irq *muic_irqs;
  49         unsigned int num_muic_irqs;
  50         int irq;
  51         bool irq_attach;
  52         bool irq_detach;
  53         struct work_struct irq_work;
  54
  55         struct reg_data *reg_data;
  56         unsigned int num_reg_data;
  57
  58         struct mutex mutex;
  59
  60         /*
  61          * Use delayed workqueue to detect cable state and then
  62          * notify cable state to notifiee/platform through uevent.
  63          * After completing the booting of platform, the extcon provider
  64          * driver should notify cable state to upper layer.
  65          */
  66         struct delayed_work wq_detcable;
  67 };
  68
  69 /* Default value of SM5502 register to bring up MUIC device. */
  70 static struct reg_data sm5502_reg_data[] = {
  71         {
  72                 .reg = SM5502_REG_CONTROL,
  73                 .val = SM5502_REG_CONTROL_MASK_INT_MASK,
  74                 .invert = false,
  75         }, {
  76                 .reg = SM5502_REG_INTMASK1,
  77                 .val = SM5502_REG_INTM1_KP_MASK
  78                         | SM5502_REG_INTM1_LKP_MASK
  79                         | SM5502_REG_INTM1_LKR_MASK,
  80                 .invert = true,
  81         }, {
  82                 .reg = SM5502_REG_INTMASK2,
  83                 .val = SM5502_REG_INTM2_VBUS_DET_MASK
  84                         | SM5502_REG_INTM2_REV_ACCE_MASK
  85                         | SM5502_REG_INTM2_ADC_CHG_MASK
  86                         | SM5502_REG_INTM2_STUCK_KEY_MASK
  87                         | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
  88                         | SM5502_REG_INTM2_MHL_MASK,
  89                 .invert = true,
  90         },
  91         { }
  92 };
  93
  94 /* List of detectable cables */
  95 static const unsigned int sm5502_extcon_cable[] = {
  96         EXTCON_USB,
  97         EXTCON_USB_HOST,
  98         EXTCON_CHG_USB_SDP,
  99         EXTCON_CHG_USB_DCP,
 100         EXTCON_NONE,
 101 };
 102
 103 /* Define supported accessory type */
 104 enum sm5502_muic_acc_type {
 105         SM5502_MUIC_ADC_GROUND = 0x0,
 106         SM5502_MUIC_ADC_SEND_END_BUTTON,
 107         SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
 108         SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
 109         SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
 110         SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
 111         SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
 112         SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
 113         SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
 114         SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
 115         SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
 116         SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
 117         SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
 118         SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
 119         SM5502_MUIC_ADC_RESERVED_ACC_1,
 120         SM5502_MUIC_ADC_RESERVED_ACC_2,
 121         SM5502_MUIC_ADC_RESERVED_ACC_3,
 122         SM5502_MUIC_ADC_RESERVED_ACC_4,
 123         SM5502_MUIC_ADC_RESERVED_ACC_5,
 124         SM5502_MUIC_ADC_AUDIO_TYPE2,
 125         SM5502_MUIC_ADC_PHONE_POWERED_DEV,
 126         SM5502_MUIC_ADC_TTY_CONVERTER,
 127         SM5502_MUIC_ADC_UART_CABLE,
 128         SM5502_MUIC_ADC_TYPE1_CHARGER,
 129         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
 130         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
 131         SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
 132         SM5502_MUIC_ADC_TYPE2_CHARGER,
 133         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
 134         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
 135         SM5502_MUIC_ADC_AUDIO_TYPE1,
 136         SM5502_MUIC_ADC_OPEN = 0x1f,
 137
 138         /* The below accessories have same ADC value (0x1f or 0x1e).
 139            So, Device type1 is used to separate specific accessory. */
 140                                                         /* |---------|--ADC| */
 141                                                         /* |    [7:5]|[4:0]| */
 142         SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
 143         SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
 144                                                         /* |Dev Type1|--ADC| */
 145         SM5502_MUIC_ADC_OPEN_USB = 0x5f,                /* |      010|11111| */
 146         SM5502_MUIC_ADC_OPEN_TA = 0xdf,                 /* |      110|11111| */
 147         SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,            /* |      111|11111| */
 148 };
 149
 150 /* List of supported interrupt for SM5502 */
 151 static struct muic_irq sm5502_muic_irqs[] = {
 152         { SM5502_IRQ_INT1_ATTACH,       "muic-attach" },
 153         { SM5502_IRQ_INT1_DETACH,       "muic-detach" },
 154         { SM5502_IRQ_INT1_KP,           "muic-kp" },
 155         { SM5502_IRQ_INT1_LKP,          "muic-lkp" },
 156         { SM5502_IRQ_INT1_LKR,          "muic-lkr" },
 157         { SM5502_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
 158         { SM5502_IRQ_INT1_OCP_EVENT,    "muic-ocp-event" },
 159         { SM5502_IRQ_INT1_OVP_OCP_DIS,  "muic-ovp-ocp-dis" },
 160         { SM5502_IRQ_INT2_VBUS_DET,     "muic-vbus-det" },
 161         { SM5502_IRQ_INT2_REV_ACCE,     "muic-rev-acce" },
 162         { SM5502_IRQ_INT2_ADC_CHG,      "muic-adc-chg" },
 163         { SM5502_IRQ_INT2_STUCK_KEY,    "muic-stuck-key" },
 164         { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
 165         { SM5502_IRQ_INT2_MHL,          "muic-mhl" },
 166 };
 167
 168 /* Define interrupt list of SM5502 to register regmap_irq */
 169 static const struct regmap_irq sm5502_irqs[] = {
 170         /* INT1 interrupts */
 171         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
 172         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
 173         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
 174         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
 175         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
 176         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
 177         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
 178         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
 179
 180         /* INT2 interrupts */
 181         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
 182         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
 183         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
 184         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
 185         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
 186         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
 187 };
 188
 189 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
 190         .name                   = "sm5502",
 191         .status_base            = SM5502_REG_INT1,
 192         .mask_base              = SM5502_REG_INTMASK1,
 193         .mask_invert            = false,
 194         .num_regs               = 2,
 195         .irqs                   = sm5502_irqs,
 196         .num_irqs               = ARRAY_SIZE(sm5502_irqs),
 197 };
 198
 199 /* Define regmap configuration of SM5502 for I2C communication  */
 200 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
 201 {
 202         switch (reg) {
 203         case SM5502_REG_INTMASK1:
 204         case SM5502_REG_INTMASK2:
 205                 return true;
 206         default:
 207                 break;
 208         }
 209         return false;
 210 }
 211
 212 static const struct regmap_config sm5502_muic_regmap_config = {
 213         .reg_bits       = 8,
 214         .val_bits       = 8,
 215         .volatile_reg   = sm5502_muic_volatile_reg,
 216         .max_register   = SM5502_REG_END,
 217 };
 218
 219 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
 220 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
 221                                 unsigned int con_sw, unsigned int vbus_sw,
 222                                 bool attached)
 223 {
 224         int ret;
 225
 226         if (!attached) {
 227                 con_sw  = DM_DP_SWITCH_OPEN;
 228                 vbus_sw = VBUSIN_SWITCH_OPEN;
 229         }
 230
 231         switch (con_sw) {
 232         case DM_DP_SWITCH_OPEN:
 233         case DM_DP_SWITCH_USB:
 234         case DM_DP_SWITCH_AUDIO:
 235         case DM_DP_SWITCH_UART:
 236                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 237                                          SM5502_REG_MANUAL_SW1_DP_MASK |
 238                                          SM5502_REG_MANUAL_SW1_DM_MASK,
 239                                          con_sw);
 240                 if (ret < 0) {
 241                         dev_err(info->dev,
 242                                 "cannot update DM_CON/DP_CON switch\n");
 243                         return ret;
 244                 }
 245                 break;
 246         default:
 247                 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
 248                                 con_sw);
 249                 return -EINVAL;
 250         };
 251
 252         switch (vbus_sw) {
 253         case VBUSIN_SWITCH_OPEN:
 254         case VBUSIN_SWITCH_VBUSOUT:
 255         case VBUSIN_SWITCH_MIC:
 256         case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
 257                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 258                                          SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
 259                                          vbus_sw);
 260                 if (ret < 0) {
 261                         dev_err(info->dev,
 262                                 "cannot update VBUSIN switch\n");
 263                         return ret;
 264                 }
 265                 break;
 266         default:
 267                 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
 268                 return -EINVAL;
 269         };
 270
 271         return 0;
 272 }
 273
 274 /* Return cable type of attached or detached accessories */
 275 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
 276 {
 277         unsigned int cable_type = -1, adc, dev_type1;
 278         int ret;
 279
 280         /* Read ADC value according to external cable or button */
 281         ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
 282         if (ret) {
 283                 dev_err(info->dev, "failed to read ADC register\n");
 284                 return ret;
 285         }
 286
 287         /*
 288          * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
 289          * connected with to MUIC device.
 290          */
 291         cable_type = adc & SM5502_REG_ADC_MASK;
 292         if (cable_type == SM5502_MUIC_ADC_GROUND)
 293                 return SM5502_MUIC_ADC_GROUND;
 294
 295         switch (cable_type) {
 296         case SM5502_MUIC_ADC_GROUND:
 297         case SM5502_MUIC_ADC_SEND_END_BUTTON:
 298         case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
 299         case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
 300         case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
 301         case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
 302         case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
 303         case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
 304         case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
 305         case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
 306         case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
 307         case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
 308         case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
 309         case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
 310         case SM5502_MUIC_ADC_RESERVED_ACC_1:
 311         case SM5502_MUIC_ADC_RESERVED_ACC_2:
 312         case SM5502_MUIC_ADC_RESERVED_ACC_3:
 313         case SM5502_MUIC_ADC_RESERVED_ACC_4:
 314         case SM5502_MUIC_ADC_RESERVED_ACC_5:
 315         case SM5502_MUIC_ADC_AUDIO_TYPE2:
 316         case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
 317         case SM5502_MUIC_ADC_TTY_CONVERTER:
 318         case SM5502_MUIC_ADC_UART_CABLE:
 319         case SM5502_MUIC_ADC_TYPE1_CHARGER:
 320         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
 321         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
 322         case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
 323         case SM5502_MUIC_ADC_TYPE2_CHARGER:
 324         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
 325         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
 326                 break;
 327         case SM5502_MUIC_ADC_AUDIO_TYPE1:
 328                 /*
 329                  * Check whether cable type is
 330                  * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
 331                  * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
 332                  * by using Button event.
 333                  */
 334                 break;
 335         case SM5502_MUIC_ADC_OPEN:
 336                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 337                                   &dev_type1);
 338                 if (ret) {
 339                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 340                         return ret;
 341                 }
 342
 343                 switch (dev_type1) {
 344                 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
 345                         cable_type = SM5502_MUIC_ADC_OPEN_USB;
 346                         break;
 347                 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
 348                         cable_type = SM5502_MUIC_ADC_OPEN_TA;
 349                         break;
 350                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
 351                         cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
 352                         break;
 353                 default:
 354                         dev_dbg(info->dev,
 355                                 "cannot identify the cable type: adc(0x%x)\n",
 356                                 adc);
 357                         return -EINVAL;
 358                 };
 359                 break;
 360         default:
 361                 dev_err(info->dev,
 362                         "failed to identify the cable type: adc(0x%x)\n", adc);
 363                 return -EINVAL;
 364         };
 365
 366         return cable_type;
 367 }
 368
 369 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
 370                                      bool attached)
 371 {
 372         static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
 373         unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
 374         unsigned int con_sw = DM_DP_SWITCH_OPEN;
 375         unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
 376         unsigned int id;
 377         int ret;
 378
 379         /* Get the type of attached or detached cable */
 380         if (attached)
 381                 cable_type = sm5502_muic_get_cable_type(info);
 382         else
 383                 cable_type = prev_cable_type;
 384         prev_cable_type = cable_type;
 385
 386         switch (cable_type) {
 387         case SM5502_MUIC_ADC_OPEN_USB:
 388                 id      = EXTCON_USB;
 389                 con_sw  = DM_DP_SWITCH_USB;
 390                 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
 391                 break;
 392         case SM5502_MUIC_ADC_OPEN_TA:
 393                 id      = EXTCON_CHG_USB_DCP;
 394                 con_sw  = DM_DP_SWITCH_OPEN;
 395                 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
 396                 break;
 397         case SM5502_MUIC_ADC_OPEN_USB_OTG:
 398                 id      = EXTCON_USB_HOST;
 399                 con_sw  = DM_DP_SWITCH_USB;
 400                 vbus_sw = VBUSIN_SWITCH_OPEN;
 401                 break;
 402         default:
 403                 dev_dbg(info->dev,
 404                         "cannot handle this cable_type (0x%x)\n", cable_type);
 405                 return 0;
 406         };
 407
 408         /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
 409         ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
 410         if (ret < 0)
 411                 return ret;
 412
 413         /* Change the state of external accessory */
 414         extcon_set_state_sync(info->edev, id, attached);
 415         if (id == EXTCON_USB)
 416                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 417                                         attached);
 418
 419         return 0;
 420 }
 421
 422 static void sm5502_muic_irq_work(struct work_struct *work)
 423 {
 424         struct sm5502_muic_info *info = container_of(work,
 425                         struct sm5502_muic_info, irq_work);
 426         int ret = 0;
 427
 428         if (!info->edev)
 429                 return;
 430
 431         mutex_lock(&info->mutex);
 432
 433         /* Detect attached or detached cables */
 434         if (info->irq_attach) {
 435                 ret = sm5502_muic_cable_handler(info, true);
 436                 info->irq_attach = false;
 437         }
 438         if (info->irq_detach) {
 439                 ret = sm5502_muic_cable_handler(info, false);
 440                 info->irq_detach = false;
 441         }
 442
 443         if (ret < 0)
 444                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 445
 446         mutex_unlock(&info->mutex);
 447 }
 448
 449 /*
 450  * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
 451  * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
 452  */
 453 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
 454 {
 455         switch (irq_type) {
 456         case SM5502_IRQ_INT1_ATTACH:
 457                 info->irq_attach = true;
 458                 break;
 459         case SM5502_IRQ_INT1_DETACH:
 460                 info->irq_detach = true;
 461                 break;
 462         case SM5502_IRQ_INT1_KP:
 463         case SM5502_IRQ_INT1_LKP:
 464         case SM5502_IRQ_INT1_LKR:
 465         case SM5502_IRQ_INT1_OVP_EVENT:
 466         case SM5502_IRQ_INT1_OCP_EVENT:
 467         case SM5502_IRQ_INT1_OVP_OCP_DIS:
 468         case SM5502_IRQ_INT2_VBUS_DET:
 469         case SM5502_IRQ_INT2_REV_ACCE:
 470         case SM5502_IRQ_INT2_ADC_CHG:
 471         case SM5502_IRQ_INT2_STUCK_KEY:
 472         case SM5502_IRQ_INT2_STUCK_KEY_RCV:
 473         case SM5502_IRQ_INT2_MHL:
 474         default:
 475                 break;
 476         }
 477
 478         return 0;
 479 }
 480
 481 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
 482 {
 483         struct sm5502_muic_info *info = data;
 484         int i, irq_type = -1, ret;
 485
 486         for (i = 0; i < info->num_muic_irqs; i++)
 487                 if (irq == info->muic_irqs[i].virq)
 488                         irq_type = info->muic_irqs[i].irq;
 489
 490         ret = sm5502_parse_irq(info, irq_type);
 491         if (ret < 0) {
 492                 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
 493                                     irq_type);
 494                 return IRQ_HANDLED;
 495         }
 496         schedule_work(&info->irq_work);
 497
 498         return IRQ_HANDLED;
 499 }
 500
 501 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
 502 {
 503         struct sm5502_muic_info *info = container_of(to_delayed_work(work),
 504                                 struct sm5502_muic_info, wq_detcable);
 505         int ret;
 506
 507         /* Notify the state of connector cable or not  */
 508         ret = sm5502_muic_cable_handler(info, true);
 509         if (ret < 0)
 510                 dev_warn(info->dev, "failed to detect cable state\n");
 511 }
 512
 513 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
 514 {
 515         unsigned int reg_data, vendor_id, version_id;
 516         int i, ret;
 517
 518         /* To test I2C, Print version_id and vendor_id of SM5502 */
 519         ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
 520         if (ret) {
 521                 dev_err(info->dev,
 522                         "failed to read DEVICE_ID register: %d\n", ret);
 523                 return;
 524         }
 525
 526         vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
 527                                 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
 528         version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
 529                                 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
 530
 531         dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
 532                             version_id, vendor_id);
 533
 534         /* Initiazle the register of SM5502 device to bring-up */
 535         for (i = 0; i < info->num_reg_data; i++) {
 536                 unsigned int val = 0;
 537
 538                 if (!info->reg_data[i].invert)
 539                         val |= ~info->reg_data[i].val;
 540                 else
 541                         val = info->reg_data[i].val;
 542                 regmap_write(info->regmap, info->reg_data[i].reg, val);
 543         }
 544 }
 545
 546 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
 547                                  const struct i2c_device_id *id)
 548 {
 549         struct device_node *np = i2c->dev.of_node;
 550         struct sm5502_muic_info *info;
 551         int i, ret, irq_flags;
 552
 553         if (!np)
 554                 return -EINVAL;
 555
 556         info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
 557         if (!info)
 558                 return -ENOMEM;
 559         i2c_set_clientdata(i2c, info);
 560
 561         info->dev = &i2c->dev;
 562         info->i2c = i2c;
 563         info->irq = i2c->irq;
 564         info->muic_irqs = sm5502_muic_irqs;
 565         info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
 566         info->reg_data = sm5502_reg_data;
 567         info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
 568
 569         mutex_init(&info->mutex);
 570
 571         INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
 572
 573         info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
 574         if (IS_ERR(info->regmap)) {
 575                 ret = PTR_ERR(info->regmap);
 576                 dev_err(info->dev, "failed to allocate register map: %d\n",
 577                                    ret);
 578                 return ret;
 579         }
 580
 581         /* Support irq domain for SM5502 MUIC device */
 582         irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
 583         ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
 584                                   &sm5502_muic_irq_chip, &info->irq_data);
 585         if (ret != 0) {
 586                 dev_err(info->dev, "failed to request IRQ %d: %d\n",
 587                                     info->irq, ret);
 588                 return ret;
 589         }
 590
 591         for (i = 0; i < info->num_muic_irqs; i++) {
 592                 struct muic_irq *muic_irq = &info->muic_irqs[i];
 593                 int virq = 0;
 594
 595                 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
 596                 if (virq <= 0)
 597                         return -EINVAL;
 598                 muic_irq->virq = virq;
 599
 600                 ret = devm_request_threaded_irq(info->dev, virq, NULL,
 601                                                 sm5502_muic_irq_handler,
 602                                                 IRQF_NO_SUSPEND,
 603                                                 muic_irq->name, info);
 604                 if (ret) {
 605                         dev_err(info->dev,
 606                                 "failed: irq request (IRQ: %d, error :%d)\n",
 607                                 muic_irq->irq, ret);
 608                         return ret;
 609                 }
 610         }
 611
 612         /* Allocate extcon device */
 613         info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
 614         if (IS_ERR(info->edev)) {
 615                 dev_err(info->dev, "failed to allocate memory for extcon\n");
 616                 return -ENOMEM;
 617         }
 618
 619         /* Register extcon device */
 620         ret = devm_extcon_dev_register(info->dev, info->edev);
 621         if (ret) {
 622                 dev_err(info->dev, "failed to register extcon device\n");
 623                 return ret;
 624         }
 625
 626         /*
 627          * Detect accessory after completing the initialization of platform
 628          *
 629          * - Use delayed workqueue to detect cable state and then
 630          * notify cable state to notifiee/platform through uevent.
 631          * After completing the booting of platform, the extcon provider
 632          * driver should notify cable state to upper layer.
 633          */
 634         INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
 635         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 636                         msecs_to_jiffies(DELAY_MS_DEFAULT));
 637
 638         /* Initialize SM5502 device and print vendor id and version id */
 639         sm5502_init_dev_type(info);
 640
 641         return 0;
 642 }
 643
 644 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
 645 {
 646         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 647
 648         regmap_del_irq_chip(info->irq, info->irq_data);
 649
 650         return 0;
 651 }
 652
 653 static const struct of_device_id sm5502_dt_match[] = {
 654         { .compatible = "siliconmitus,sm5502-muic" },
 655         { },
 656 };
 657 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
 658
 659 #ifdef CONFIG_PM_SLEEP
 660 static int sm5502_muic_suspend(struct device *dev)
 661 {
 662         struct i2c_client *i2c = to_i2c_client(dev);
 663         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 664
 665         enable_irq_wake(info->irq);
 666
 667         return 0;
 668 }
 669
 670 static int sm5502_muic_resume(struct device *dev)
 671 {
 672         struct i2c_client *i2c = to_i2c_client(dev);
 673         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 674
 675         disable_irq_wake(info->irq);
 676
 677         return 0;
 678 }
 679 #endif
 680
 681 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
 682                          sm5502_muic_suspend, sm5502_muic_resume);
 683
 684 static const struct i2c_device_id sm5502_i2c_id[] = {
 685         { "sm5502", TYPE_SM5502 },
 686         { }
 687 };
 688 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
 689
 690 static struct i2c_driver sm5502_muic_i2c_driver = {
 691         .driver         = {
 692                 .name   = "sm5502",
 693                 .pm     = &sm5502_muic_pm_ops,
 694                 .of_match_table = sm5502_dt_match,
 695         },
 696         .probe  = sm5022_muic_i2c_probe,
 697         .remove = sm5502_muic_i2c_remove,
 698         .id_table = sm5502_i2c_id,
 699 };
 700
 701 static int __init sm5502_muic_i2c_init(void)
 702 {
 703         return i2c_add_driver(&sm5502_muic_i2c_driver);
 704 }
 705 subsys_initcall(sm5502_muic_i2c_init);
 706
 707 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
 708 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 709 MODULE_LICENSE("GPL");