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