drivers/extcon/extcon-sm5502.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
   4  *
   5  * Copyright (c) 2014 Samsung Electronics Co., Ltd
   6  * Author: Chanwoo Choi <cw00.choi@samsung.com>
   7  */
   8
   9 #include <linux/err.h>
  10 #include <linux/i2c.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/irqdomain.h>
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/regmap.h>
  17 #include <linux/slab.h>
  18 #include <linux/extcon-provider.h>
  19
  20 #include "extcon-sm5502.h"
  21
  22 #define DELAY_MS_DEFAULT                17000   /* unit: millisecond */
  23
  24 struct muic_irq {
  25         unsigned int irq;
  26         const char *name;
  27         unsigned int virq;
  28 };
  29
  30 struct reg_data {
  31         u8 reg;
  32         unsigned int val;
  33         bool invert;
  34 };
  35
  36 struct sm5502_muic_info {
  37         struct device *dev;
  38         struct extcon_dev *edev;
  39
  40         struct i2c_client *i2c;
  41         struct regmap *regmap;
  42
  43         struct regmap_irq_chip_data *irq_data;
  44         struct muic_irq *muic_irqs;
  45         unsigned int num_muic_irqs;
  46         int irq;
  47         bool irq_attach;
  48         bool irq_detach;
  49         struct work_struct irq_work;
  50
  51         struct reg_data *reg_data;
  52         unsigned int num_reg_data;
  53
  54         struct mutex mutex;
  55
  56         /*
  57          * Use delayed workqueue to detect cable state and then
  58          * notify cable state to notifiee/platform through uevent.
  59          * After completing the booting of platform, the extcon provider
  60          * driver should notify cable state to upper layer.
  61          */
  62         struct delayed_work wq_detcable;
  63 };
  64
  65 /* Default value of SM5502 register to bring up MUIC device. */
  66 static struct reg_data sm5502_reg_data[] = {
  67         {
  68                 .reg = SM5502_REG_RESET,
  69                 .val = SM5502_REG_RESET_MASK,
  70                 .invert = true,
  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         /*
 139          * The below accessories have same ADC value (0x1f or 0x1e).
 140          * So, Device type1 is used to separate specific accessory.
 141          */
 142                                                         /* |---------|--ADC| */
 143                                                         /* |    [7:5]|[4:0]| */
 144         SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
 145         SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
 146                                                         /* |Dev Type1|--ADC| */
 147         SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80,          /* |      100|00000| */
 148         SM5502_MUIC_ADC_OPEN_USB = 0x5f,                /* |      010|11111| */
 149         SM5502_MUIC_ADC_OPEN_TA = 0xdf,                 /* |      110|11111| */
 150         SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,            /* |      111|11111| */
 151 };
 152
 153 /* List of supported interrupt for SM5502 */
 154 static struct muic_irq sm5502_muic_irqs[] = {
 155         { SM5502_IRQ_INT1_ATTACH,       "muic-attach" },
 156         { SM5502_IRQ_INT1_DETACH,       "muic-detach" },
 157         { SM5502_IRQ_INT1_KP,           "muic-kp" },
 158         { SM5502_IRQ_INT1_LKP,          "muic-lkp" },
 159         { SM5502_IRQ_INT1_LKR,          "muic-lkr" },
 160         { SM5502_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
 161         { SM5502_IRQ_INT1_OCP_EVENT,    "muic-ocp-event" },
 162         { SM5502_IRQ_INT1_OVP_OCP_DIS,  "muic-ovp-ocp-dis" },
 163         { SM5502_IRQ_INT2_VBUS_DET,     "muic-vbus-det" },
 164         { SM5502_IRQ_INT2_REV_ACCE,     "muic-rev-acce" },
 165         { SM5502_IRQ_INT2_ADC_CHG,      "muic-adc-chg" },
 166         { SM5502_IRQ_INT2_STUCK_KEY,    "muic-stuck-key" },
 167         { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
 168         { SM5502_IRQ_INT2_MHL,          "muic-mhl" },
 169 };
 170
 171 /* Define interrupt list of SM5502 to register regmap_irq */
 172 static const struct regmap_irq sm5502_irqs[] = {
 173         /* INT1 interrupts */
 174         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
 175         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
 176         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
 177         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
 178         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
 179         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
 180         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
 181         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
 182
 183         /* INT2 interrupts */
 184         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
 185         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
 186         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
 187         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
 188         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
 189         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
 190 };
 191
 192 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
 193         .name                   = "sm5502",
 194         .status_base            = SM5502_REG_INT1,
 195         .mask_base              = SM5502_REG_INTMASK1,
 196         .mask_invert            = false,
 197         .num_regs               = 2,
 198         .irqs                   = sm5502_irqs,
 199         .num_irqs               = ARRAY_SIZE(sm5502_irqs),
 200 };
 201
 202 /* Define regmap configuration of SM5502 for I2C communication  */
 203 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
 204 {
 205         switch (reg) {
 206         case SM5502_REG_INTMASK1:
 207         case SM5502_REG_INTMASK2:
 208                 return true;
 209         default:
 210                 break;
 211         }
 212         return false;
 213 }
 214
 215 static const struct regmap_config sm5502_muic_regmap_config = {
 216         .reg_bits       = 8,
 217         .val_bits       = 8,
 218         .volatile_reg   = sm5502_muic_volatile_reg,
 219         .max_register   = SM5502_REG_END,
 220 };
 221
 222 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
 223 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
 224                                 unsigned int con_sw, unsigned int vbus_sw,
 225                                 bool attached)
 226 {
 227         int ret;
 228
 229         if (!attached) {
 230                 con_sw  = DM_DP_SWITCH_OPEN;
 231                 vbus_sw = VBUSIN_SWITCH_OPEN;
 232         }
 233
 234         switch (con_sw) {
 235         case DM_DP_SWITCH_OPEN:
 236         case DM_DP_SWITCH_USB:
 237         case DM_DP_SWITCH_AUDIO:
 238         case DM_DP_SWITCH_UART:
 239                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 240                                          SM5502_REG_MANUAL_SW1_DP_MASK |
 241                                          SM5502_REG_MANUAL_SW1_DM_MASK,
 242                                          con_sw);
 243                 if (ret < 0) {
 244                         dev_err(info->dev,
 245                                 "cannot update DM_CON/DP_CON switch\n");
 246                         return ret;
 247                 }
 248                 break;
 249         default:
 250                 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
 251                                 con_sw);
 252                 return -EINVAL;
 253         }
 254
 255         switch (vbus_sw) {
 256         case VBUSIN_SWITCH_OPEN:
 257         case VBUSIN_SWITCH_VBUSOUT:
 258         case VBUSIN_SWITCH_MIC:
 259         case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
 260                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 261                                          SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
 262                                          vbus_sw);
 263                 if (ret < 0) {
 264                         dev_err(info->dev,
 265                                 "cannot update VBUSIN switch\n");
 266                         return ret;
 267                 }
 268                 break;
 269         default:
 270                 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
 271                 return -EINVAL;
 272         }
 273
 274         return 0;
 275 }
 276
 277 /* Return cable type of attached or detached accessories */
 278 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
 279 {
 280         unsigned int cable_type, adc, dev_type1;
 281         int ret;
 282
 283         /* Read ADC value according to external cable or button */
 284         ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
 285         if (ret) {
 286                 dev_err(info->dev, "failed to read ADC register\n");
 287                 return ret;
 288         }
 289
 290         /*
 291          * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
 292          * connected with to MUIC device.
 293          */
 294         cable_type = adc & SM5502_REG_ADC_MASK;
 295
 296         switch (cable_type) {
 297         case SM5502_MUIC_ADC_GROUND:
 298                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 299                                   &dev_type1);
 300                 if (ret) {
 301                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 302                         return ret;
 303                 }
 304
 305                 switch (dev_type1) {
 306                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
 307                         cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;
 308                         break;
 309                 default:
 310                         dev_dbg(info->dev,
 311                                 "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",
 312                                 adc, dev_type1);
 313                         return -EINVAL;
 314                 }
 315                 break;
 316         case SM5502_MUIC_ADC_SEND_END_BUTTON:
 317         case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
 318         case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
 319         case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
 320         case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
 321         case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
 322         case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
 323         case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
 324         case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
 325         case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
 326         case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
 327         case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
 328         case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
 329         case SM5502_MUIC_ADC_RESERVED_ACC_1:
 330         case SM5502_MUIC_ADC_RESERVED_ACC_2:
 331         case SM5502_MUIC_ADC_RESERVED_ACC_3:
 332         case SM5502_MUIC_ADC_RESERVED_ACC_4:
 333         case SM5502_MUIC_ADC_RESERVED_ACC_5:
 334         case SM5502_MUIC_ADC_AUDIO_TYPE2:
 335         case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
 336         case SM5502_MUIC_ADC_TTY_CONVERTER:
 337         case SM5502_MUIC_ADC_UART_CABLE:
 338         case SM5502_MUIC_ADC_TYPE1_CHARGER:
 339         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
 340         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
 341         case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
 342         case SM5502_MUIC_ADC_TYPE2_CHARGER:
 343         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
 344         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
 345                 break;
 346         case SM5502_MUIC_ADC_AUDIO_TYPE1:
 347                 /*
 348                  * Check whether cable type is
 349                  * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
 350                  * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
 351                  * by using Button event.
 352                  */
 353                 break;
 354         case SM5502_MUIC_ADC_OPEN:
 355                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 356                                   &dev_type1);
 357                 if (ret) {
 358                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 359                         return ret;
 360                 }
 361
 362                 switch (dev_type1) {
 363                 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
 364                         cable_type = SM5502_MUIC_ADC_OPEN_USB;
 365                         break;
 366                 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
 367                         cable_type = SM5502_MUIC_ADC_OPEN_TA;
 368                         break;
 369                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
 370                         cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
 371                         break;
 372                 default:
 373                         dev_dbg(info->dev,
 374                                 "cannot identify the cable type: adc(0x%x)\n",
 375                                 adc);
 376                         return -EINVAL;
 377                 }
 378                 break;
 379         default:
 380                 dev_err(info->dev,
 381                         "failed to identify the cable type: adc(0x%x)\n", adc);
 382                 return -EINVAL;
 383         }
 384
 385         return cable_type;
 386 }
 387
 388 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
 389                                      bool attached)
 390 {
 391         static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
 392         unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
 393         unsigned int con_sw = DM_DP_SWITCH_OPEN;
 394         unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
 395         unsigned int id;
 396         int ret;
 397
 398         /* Get the type of attached or detached cable */
 399         if (attached)
 400                 cable_type = sm5502_muic_get_cable_type(info);
 401         else
 402                 cable_type = prev_cable_type;
 403         prev_cable_type = cable_type;
 404
 405         switch (cable_type) {
 406         case SM5502_MUIC_ADC_OPEN_USB:
 407                 id      = EXTCON_USB;
 408                 con_sw  = DM_DP_SWITCH_USB;
 409                 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
 410                 break;
 411         case SM5502_MUIC_ADC_OPEN_TA:
 412                 id      = EXTCON_CHG_USB_DCP;
 413                 con_sw  = DM_DP_SWITCH_OPEN;
 414                 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
 415                 break;
 416         case SM5502_MUIC_ADC_GROUND_USB_OTG:
 417         case SM5502_MUIC_ADC_OPEN_USB_OTG:
 418                 id      = EXTCON_USB_HOST;
 419                 con_sw  = DM_DP_SWITCH_USB;
 420                 vbus_sw = VBUSIN_SWITCH_OPEN;
 421                 break;
 422         default:
 423                 dev_dbg(info->dev,
 424                         "cannot handle this cable_type (0x%x)\n", cable_type);
 425                 return 0;
 426         }
 427
 428         /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
 429         ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
 430         if (ret < 0)
 431                 return ret;
 432
 433         /* Change the state of external accessory */
 434         extcon_set_state_sync(info->edev, id, attached);
 435         if (id == EXTCON_USB)
 436                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 437                                         attached);
 438
 439         return 0;
 440 }
 441
 442 static void sm5502_muic_irq_work(struct work_struct *work)
 443 {
 444         struct sm5502_muic_info *info = container_of(work,
 445                         struct sm5502_muic_info, irq_work);
 446         int ret = 0;
 447
 448         if (!info->edev)
 449                 return;
 450
 451         mutex_lock(&info->mutex);
 452
 453         /* Detect attached or detached cables */
 454         if (info->irq_attach) {
 455                 ret = sm5502_muic_cable_handler(info, true);
 456                 info->irq_attach = false;
 457         }
 458         if (info->irq_detach) {
 459                 ret = sm5502_muic_cable_handler(info, false);
 460                 info->irq_detach = false;
 461         }
 462
 463         if (ret < 0)
 464                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 465
 466         mutex_unlock(&info->mutex);
 467 }
 468
 469 /*
 470  * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
 471  * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
 472  */
 473 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
 474 {
 475         switch (irq_type) {
 476         case SM5502_IRQ_INT1_ATTACH:
 477                 info->irq_attach = true;
 478                 break;
 479         case SM5502_IRQ_INT1_DETACH:
 480                 info->irq_detach = true;
 481                 break;
 482         case SM5502_IRQ_INT1_KP:
 483         case SM5502_IRQ_INT1_LKP:
 484         case SM5502_IRQ_INT1_LKR:
 485         case SM5502_IRQ_INT1_OVP_EVENT:
 486         case SM5502_IRQ_INT1_OCP_EVENT:
 487         case SM5502_IRQ_INT1_OVP_OCP_DIS:
 488         case SM5502_IRQ_INT2_VBUS_DET:
 489         case SM5502_IRQ_INT2_REV_ACCE:
 490         case SM5502_IRQ_INT2_ADC_CHG:
 491         case SM5502_IRQ_INT2_STUCK_KEY:
 492         case SM5502_IRQ_INT2_STUCK_KEY_RCV:
 493         case SM5502_IRQ_INT2_MHL:
 494         default:
 495                 break;
 496         }
 497
 498         return 0;
 499 }
 500
 501 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
 502 {
 503         struct sm5502_muic_info *info = data;
 504         int i, irq_type = -1, ret;
 505
 506         for (i = 0; i < info->num_muic_irqs; i++)
 507                 if (irq == info->muic_irqs[i].virq)
 508                         irq_type = info->muic_irqs[i].irq;
 509
 510         ret = sm5502_parse_irq(info, irq_type);
 511         if (ret < 0) {
 512                 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
 513                                     irq_type);
 514                 return IRQ_HANDLED;
 515         }
 516         schedule_work(&info->irq_work);
 517
 518         return IRQ_HANDLED;
 519 }
 520
 521 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
 522 {
 523         struct sm5502_muic_info *info = container_of(to_delayed_work(work),
 524                                 struct sm5502_muic_info, wq_detcable);
 525         int ret;
 526
 527         /* Notify the state of connector cable or not  */
 528         ret = sm5502_muic_cable_handler(info, true);
 529         if (ret < 0)
 530                 dev_warn(info->dev, "failed to detect cable state\n");
 531 }
 532
 533 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
 534 {
 535         unsigned int reg_data, vendor_id, version_id;
 536         int i, ret;
 537
 538         /* To test I2C, Print version_id and vendor_id of SM5502 */
 539         ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
 540         if (ret) {
 541                 dev_err(info->dev,
 542                         "failed to read DEVICE_ID register: %d\n", ret);
 543                 return;
 544         }
 545
 546         vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
 547                                 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
 548         version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
 549                                 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
 550
 551         dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
 552                             version_id, vendor_id);
 553
 554         /* Initiazle the register of SM5502 device to bring-up */
 555         for (i = 0; i < info->num_reg_data; i++) {
 556                 unsigned int val = 0;
 557
 558                 if (!info->reg_data[i].invert)
 559                         val |= ~info->reg_data[i].val;
 560                 else
 561                         val = info->reg_data[i].val;
 562                 regmap_write(info->regmap, info->reg_data[i].reg, val);
 563         }
 564 }
 565
 566 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
 567                                  const struct i2c_device_id *id)
 568 {
 569         struct device_node *np = i2c->dev.of_node;
 570         struct sm5502_muic_info *info;
 571         int i, ret, irq_flags;
 572
 573         if (!np)
 574                 return -EINVAL;
 575
 576         info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
 577         if (!info)
 578                 return -ENOMEM;
 579         i2c_set_clientdata(i2c, info);
 580
 581         info->dev = &i2c->dev;
 582         info->i2c = i2c;
 583         info->irq = i2c->irq;
 584         info->muic_irqs = sm5502_muic_irqs;
 585         info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
 586         info->reg_data = sm5502_reg_data;
 587         info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
 588
 589         mutex_init(&info->mutex);
 590
 591         INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
 592
 593         info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
 594         if (IS_ERR(info->regmap)) {
 595                 ret = PTR_ERR(info->regmap);
 596                 dev_err(info->dev, "failed to allocate register map: %d\n",
 597                                    ret);
 598                 return ret;
 599         }
 600
 601         /* Support irq domain for SM5502 MUIC device */
 602         irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
 603         ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
 604                                   &sm5502_muic_irq_chip, &info->irq_data);
 605         if (ret != 0) {
 606                 dev_err(info->dev, "failed to request IRQ %d: %d\n",
 607                                     info->irq, ret);
 608                 return ret;
 609         }
 610
 611         for (i = 0; i < info->num_muic_irqs; i++) {
 612                 struct muic_irq *muic_irq = &info->muic_irqs[i];
 613                 int virq = 0;
 614
 615                 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
 616                 if (virq <= 0)
 617                         return -EINVAL;
 618                 muic_irq->virq = virq;
 619
 620                 ret = devm_request_threaded_irq(info->dev, virq, NULL,
 621                                                 sm5502_muic_irq_handler,
 622                                                 IRQF_NO_SUSPEND | IRQF_ONESHOT,
 623                                                 muic_irq->name, info);
 624                 if (ret) {
 625                         dev_err(info->dev,
 626                                 "failed: irq request (IRQ: %d, error :%d)\n",
 627                                 muic_irq->irq, ret);
 628                         return ret;
 629                 }
 630         }
 631
 632         /* Allocate extcon device */
 633         info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
 634         if (IS_ERR(info->edev)) {
 635                 dev_err(info->dev, "failed to allocate memory for extcon\n");
 636                 return -ENOMEM;
 637         }
 638
 639         /* Register extcon device */
 640         ret = devm_extcon_dev_register(info->dev, info->edev);
 641         if (ret) {
 642                 dev_err(info->dev, "failed to register extcon device\n");
 643                 return ret;
 644         }
 645
 646         /*
 647          * Detect accessory after completing the initialization of platform
 648          *
 649          * - Use delayed workqueue to detect cable state and then
 650          * notify cable state to notifiee/platform through uevent.
 651          * After completing the booting of platform, the extcon provider
 652          * driver should notify cable state to upper layer.
 653          */
 654         INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
 655         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 656                         msecs_to_jiffies(DELAY_MS_DEFAULT));
 657
 658         /* Initialize SM5502 device and print vendor id and version id */
 659         sm5502_init_dev_type(info);
 660
 661         return 0;
 662 }
 663
 664 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
 665 {
 666         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 667
 668         regmap_del_irq_chip(info->irq, info->irq_data);
 669
 670         return 0;
 671 }
 672
 673 static const struct of_device_id sm5502_dt_match[] = {
 674         { .compatible = "siliconmitus,sm5502-muic" },
 675         { },
 676 };
 677 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
 678
 679 #ifdef CONFIG_PM_SLEEP
 680 static int sm5502_muic_suspend(struct device *dev)
 681 {
 682         struct i2c_client *i2c = to_i2c_client(dev);
 683         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 684
 685         enable_irq_wake(info->irq);
 686
 687         return 0;
 688 }
 689
 690 static int sm5502_muic_resume(struct device *dev)
 691 {
 692         struct i2c_client *i2c = to_i2c_client(dev);
 693         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 694
 695         disable_irq_wake(info->irq);
 696
 697         return 0;
 698 }
 699 #endif
 700
 701 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
 702                          sm5502_muic_suspend, sm5502_muic_resume);
 703
 704 static const struct i2c_device_id sm5502_i2c_id[] = {
 705         { "sm5502", TYPE_SM5502 },
 706         { }
 707 };
 708 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
 709
 710 static struct i2c_driver sm5502_muic_i2c_driver = {
 711         .driver         = {
 712                 .name   = "sm5502",
 713                 .pm     = &sm5502_muic_pm_ops,
 714                 .of_match_table = sm5502_dt_match,
 715         },
 716         .probe  = sm5022_muic_i2c_probe,
 717         .remove = sm5502_muic_i2c_remove,
 718         .id_table = sm5502_i2c_id,
 719 };
 720
 721 static int __init sm5502_muic_i2c_init(void)
 722 {
 723         return i2c_add_driver(&sm5502_muic_i2c_driver);
 724 }
 725 subsys_initcall(sm5502_muic_i2c_init);
 726
 727 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
 728 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 729 MODULE_LICENSE("GPL");