linux/drivers/extcon/extcon-sm5502.c
<<
>>
Prefs
   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
  28struct muic_irq {
  29        unsigned int irq;
  30        const char *name;
  31        unsigned int virq;
  32};
  33
  34struct reg_data {
  35        u8 reg;
  36        unsigned int val;
  37        bool invert;
  38};
  39
  40struct 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. */
  70static 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 */
  95static 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 */
 104enum 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 */
 151static 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 */
 169static 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
 189static 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  */
 200static 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
 212static 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 */
 220static 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 */
 275static 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
 369static 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_cable_state_(info->edev, id, attached);
 415        if (id == EXTCON_USB)
 416                extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SDP,
 417                                        attached);
 418
 419        return 0;
 420}
 421
 422static 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 */
 453static 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
 481static 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
 501static 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
 513static 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
 546static 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
 644static 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
 653static const struct of_device_id sm5502_dt_match[] = {
 654        { .compatible = "siliconmitus,sm5502-muic" },
 655        { },
 656};
 657MODULE_DEVICE_TABLE(of, sm5502_dt_match);
 658
 659#ifdef CONFIG_PM_SLEEP
 660static 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
 670static 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
 681static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
 682                         sm5502_muic_suspend, sm5502_muic_resume);
 683
 684static const struct i2c_device_id sm5502_i2c_id[] = {
 685        { "sm5502", TYPE_SM5502 },
 686        { }
 687};
 688MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
 689
 690static 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
 701static int __init sm5502_muic_i2c_init(void)
 702{
 703        return i2c_add_driver(&sm5502_muic_i2c_driver);
 704}
 705subsys_initcall(sm5502_muic_i2c_init);
 706
 707MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
 708MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 709MODULE_LICENSE("GPL");
 710
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.