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 24struct muic_irq { 25 unsigned int irq; 26 const char *name; 27 unsigned int virq; 28}; 29 30struct reg_data { 31 u8 reg; 32 unsigned int val; 33 bool invert; 34}; 35 36struct 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. */ 66static 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 */ 94static 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 */ 103enum 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 */ 152static 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 */ 170static 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 190static 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 */ 201static 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 213static 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 */ 221static 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 */ 276static 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 370static 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 423static 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 */ 454static 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 482static 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 502static 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 514static 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, ®_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 547static 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 645static 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 654static const struct of_device_id sm5502_dt_match[] = { 655 { .compatible = "siliconmitus,sm5502-muic" }, 656 { }, 657}; 658MODULE_DEVICE_TABLE(of, sm5502_dt_match); 659 660#ifdef CONFIG_PM_SLEEP 661static 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 671static 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 682static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops, 683 sm5502_muic_suspend, sm5502_muic_resume); 684 685static const struct i2c_device_id sm5502_i2c_id[] = { 686 { "sm5502", TYPE_SM5502 }, 687 { } 688}; 689MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id); 690 691static 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 702static int __init sm5502_muic_i2c_init(void) 703{ 704 return i2c_add_driver(&sm5502_muic_i2c_driver); 705} 706subsys_initcall(sm5502_muic_i2c_init); 707 708MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver"); 709MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 710MODULE_LICENSE("GPL"); 711