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