1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * extcon-rt8973a.c - Richtek RT8973A extcon driver 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/input.h> 12 #include <linux/interrupt.h> 13 #include <linux/irqdomain.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/platform_device.h> 17 #include <linux/regmap.h> 18 #include <linux/slab.h> 19 #include <linux/extcon-provider.h> 20 21 #include "extcon-rt8973a.h" 22 23 #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ 24 25 struct muic_irq { 26 unsigned int irq; 27 const char *name; 28 unsigned int virq; 29 }; 30 31 struct reg_data { 32 u8 reg; 33 u8 mask; 34 u8 val; 35 bool invert; 36 }; 37 38 struct rt8973a_muic_info { 39 struct device *dev; 40 struct extcon_dev *edev; 41 42 struct i2c_client *i2c; 43 struct regmap *regmap; 44 45 struct regmap_irq_chip_data *irq_data; 46 struct muic_irq *muic_irqs; 47 unsigned int num_muic_irqs; 48 int irq; 49 bool irq_attach; 50 bool irq_detach; 51 bool irq_ovp; 52 bool irq_otp; 53 struct work_struct irq_work; 54 55 struct reg_data *reg_data; 56 unsigned int num_reg_data; 57 bool auto_config; 58 59 struct mutex mutex; 60 61 /* 62 * Use delayed workqueue to detect cable state and then 63 * notify cable state to notifiee/platform through uevent. 64 * After completing the booting of platform, the extcon provider 65 * driver should notify cable state to upper layer. 66 */ 67 struct delayed_work wq_detcable; 68 }; 69 70 /* Default value of RT8973A register to bring up MUIC device. */ 71 static struct reg_data rt8973a_reg_data[] = { 72 { 73 .reg = RT8973A_REG_CONTROL1, 74 .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK 75 | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK 76 | RT8973A_REG_CONTROL1_CHGTYP_MASK 77 | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK 78 | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK 79 | RT8973A_REG_CONTROL1_INTM_MASK, 80 .val = RT8973A_REG_CONTROL1_ADC_EN_MASK 81 | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK 82 | RT8973A_REG_CONTROL1_CHGTYP_MASK, 83 .invert = false, 84 }, 85 { /* sentinel */ } 86 }; 87 88 /* List of detectable cables */ 89 static const unsigned int rt8973a_extcon_cable[] = { 90 EXTCON_USB, 91 EXTCON_USB_HOST, 92 EXTCON_CHG_USB_SDP, 93 EXTCON_CHG_USB_DCP, 94 EXTCON_JIG, 95 EXTCON_NONE, 96 }; 97 98 /* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */ 99 enum rt8973a_event_type { 100 RT8973A_EVENT_ATTACH = 1, 101 RT8973A_EVENT_DETACH, 102 RT8973A_EVENT_OVP, 103 RT8973A_EVENT_OTP, 104 }; 105 106 /* Define supported accessory type */ 107 enum rt8973a_muic_acc_type { 108 RT8973A_MUIC_ADC_OTG = 0x0, 109 RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, 110 RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, 111 RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, 112 RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, 113 RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, 114 RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, 115 RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, 116 RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, 117 RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, 118 RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, 119 RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, 120 RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, 121 RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, 122 RT8973A_MUIC_ADC_RESERVED_ACC_1, 123 RT8973A_MUIC_ADC_RESERVED_ACC_2, 124 RT8973A_MUIC_ADC_RESERVED_ACC_3, 125 RT8973A_MUIC_ADC_RESERVED_ACC_4, 126 RT8973A_MUIC_ADC_RESERVED_ACC_5, 127 RT8973A_MUIC_ADC_AUDIO_TYPE2, 128 RT8973A_MUIC_ADC_PHONE_POWERED_DEV, 129 RT8973A_MUIC_ADC_UNKNOWN_ACC_1, 130 RT8973A_MUIC_ADC_UNKNOWN_ACC_2, 131 RT8973A_MUIC_ADC_TA, 132 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, 133 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, 134 RT8973A_MUIC_ADC_UNKNOWN_ACC_3, 135 RT8973A_MUIC_ADC_UNKNOWN_ACC_4, 136 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, 137 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, 138 RT8973A_MUIC_ADC_UNKNOWN_ACC_5, 139 RT8973A_MUIC_ADC_OPEN = 0x1f, 140 141 /* 142 * The below accessories has same ADC value (0x1f). 143 * So, Device type1 is used to separate specific accessory. 144 */ 145 /* |---------|--ADC| */ 146 /* | [7:5]|[4:0]| */ 147 RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */ 148 }; 149 150 /* List of supported interrupt for RT8973A */ 151 static struct muic_irq rt8973a_muic_irqs[] = { 152 { RT8973A_INT1_ATTACH, "muic-attach" }, 153 { RT8973A_INT1_DETACH, "muic-detach" }, 154 { RT8973A_INT1_CHGDET, "muic-chgdet" }, 155 { RT8973A_INT1_DCD_T, "muic-dcd-t" }, 156 { RT8973A_INT1_OVP, "muic-ovp" }, 157 { RT8973A_INT1_CONNECT, "muic-connect" }, 158 { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, 159 { RT8973A_INT1_OTP, "muic-otp" }, 160 { RT8973A_INT2_UVLO, "muic-uvlo" }, 161 { RT8973A_INT2_POR, "muic-por" }, 162 { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, 163 { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, 164 { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, 165 { RT8973A_INT2_OCP, "muic-ocp" }, 166 { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" }, 167 }; 168 169 /* Define interrupt list of RT8973A to register regmap_irq */ 170 static const struct regmap_irq rt8973a_irqs[] = { 171 /* INT1 interrupts */ 172 { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, 173 { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, 174 { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, 175 { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, 176 { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, 177 { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, 178 { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, 179 { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, 180 181 /* INT2 interrupts */ 182 { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, 183 { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, 184 { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, 185 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, 186 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, 187 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, 188 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, }, 189 }; 190 191 static const struct regmap_irq_chip rt8973a_muic_irq_chip = { 192 .name = "rt8973a", 193 .status_base = RT8973A_REG_INT1, 194 .mask_base = RT8973A_REG_INTM1, 195 .num_regs = 2, 196 .irqs = rt8973a_irqs, 197 .num_irqs = ARRAY_SIZE(rt8973a_irqs), 198 }; 199 200 /* Define regmap configuration of RT8973A for I2C communication */ 201 static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) 202 { 203 switch (reg) { 204 case RT8973A_REG_INTM1: 205 case RT8973A_REG_INTM2: 206 return true; 207 default: 208 break; 209 } 210 return false; 211 } 212 213 static const struct regmap_config rt8973a_muic_regmap_config = { 214 .reg_bits = 8, 215 .val_bits = 8, 216 .volatile_reg = rt8973a_muic_volatile_reg, 217 .max_register = RT8973A_REG_END, 218 }; 219 220 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ 221 static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, 222 unsigned int con_sw, bool attached) 223 { 224 int ret; 225 226 /* 227 * Don't need to set h/w path according to cable type 228 * if Auto-configuration mode of CONTROL1 register is true. 229 */ 230 if (info->auto_config) 231 return 0; 232 233 if (!attached) 234 con_sw = DM_DP_SWITCH_UART; 235 236 switch (con_sw) { 237 case DM_DP_SWITCH_OPEN: 238 case DM_DP_SWITCH_USB: 239 case DM_DP_SWITCH_UART: 240 ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, 241 RT8973A_REG_MANUAL_SW1_DP_MASK | 242 RT8973A_REG_MANUAL_SW1_DM_MASK, 243 con_sw); 244 if (ret < 0) { 245 dev_err(info->dev, 246 "cannot update DM_CON/DP_CON switch\n"); 247 return ret; 248 } 249 break; 250 default: 251 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", 252 con_sw); 253 return -EINVAL; 254 } 255 256 return 0; 257 } 258 259 static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) 260 { 261 unsigned int adc, dev1; 262 int ret, cable_type; 263 264 /* Read ADC value according to external cable or button */ 265 ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); 266 if (ret) { 267 dev_err(info->dev, "failed to read ADC register\n"); 268 return ret; 269 } 270 cable_type = adc & RT8973A_REG_ADC_MASK; 271 272 /* Read Device 1 reigster to identify correct cable type */ 273 ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); 274 if (ret) { 275 dev_err(info->dev, "failed to read DEV1 register\n"); 276 return ret; 277 } 278 279 switch (adc) { 280 case RT8973A_MUIC_ADC_OPEN: 281 if (dev1 & RT8973A_REG_DEV1_USB_MASK) 282 cable_type = RT8973A_MUIC_ADC_USB; 283 else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) 284 cable_type = RT8973A_MUIC_ADC_TA; 285 else 286 cable_type = RT8973A_MUIC_ADC_OPEN; 287 break; 288 default: 289 break; 290 } 291 292 return cable_type; 293 } 294 295 static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, 296 enum rt8973a_event_type event) 297 { 298 static unsigned int prev_cable_type; 299 unsigned int con_sw = DM_DP_SWITCH_UART; 300 int ret, cable_type; 301 unsigned int id; 302 bool attached = false; 303 304 switch (event) { 305 case RT8973A_EVENT_ATTACH: 306 cable_type = rt8973a_muic_get_cable_type(info); 307 attached = true; 308 break; 309 case RT8973A_EVENT_DETACH: 310 cable_type = prev_cable_type; 311 attached = false; 312 break; 313 case RT8973A_EVENT_OVP: 314 case RT8973A_EVENT_OTP: 315 dev_warn(info->dev, 316 "happen Over %s issue. Need to disconnect all cables\n", 317 event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); 318 cable_type = prev_cable_type; 319 attached = false; 320 break; 321 default: 322 dev_err(info->dev, 323 "Cannot handle this event (event:%d)\n", event); 324 return -EINVAL; 325 } 326 prev_cable_type = cable_type; 327 328 switch (cable_type) { 329 case RT8973A_MUIC_ADC_OTG: 330 id = EXTCON_USB_HOST; 331 con_sw = DM_DP_SWITCH_USB; 332 break; 333 case RT8973A_MUIC_ADC_TA: 334 id = EXTCON_CHG_USB_DCP; 335 con_sw = DM_DP_SWITCH_OPEN; 336 break; 337 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: 338 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: 339 id = EXTCON_JIG; 340 con_sw = DM_DP_SWITCH_USB; 341 break; 342 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: 343 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: 344 id = EXTCON_JIG; 345 con_sw = DM_DP_SWITCH_UART; 346 break; 347 case RT8973A_MUIC_ADC_USB: 348 id = EXTCON_USB; 349 con_sw = DM_DP_SWITCH_USB; 350 break; 351 case RT8973A_MUIC_ADC_OPEN: 352 return 0; 353 case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: 354 case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: 355 case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: 356 case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: 357 case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: 358 dev_warn(info->dev, 359 "Unknown accessory type (adc:0x%x)\n", cable_type); 360 return 0; 361 case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: 362 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: 363 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: 364 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: 365 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: 366 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: 367 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: 368 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: 369 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: 370 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: 371 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: 372 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: 373 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: 374 case RT8973A_MUIC_ADC_AUDIO_TYPE2: 375 dev_warn(info->dev, 376 "Audio device/button type (adc:0x%x)\n", cable_type); 377 return 0; 378 case RT8973A_MUIC_ADC_RESERVED_ACC_1: 379 case RT8973A_MUIC_ADC_RESERVED_ACC_2: 380 case RT8973A_MUIC_ADC_RESERVED_ACC_3: 381 case RT8973A_MUIC_ADC_RESERVED_ACC_4: 382 case RT8973A_MUIC_ADC_RESERVED_ACC_5: 383 case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: 384 return 0; 385 default: 386 dev_err(info->dev, 387 "Cannot handle this cable_type (adc:0x%x)\n", 388 cable_type); 389 return -EINVAL; 390 } 391 392 /* Change internal hardware path(DM_CON/DP_CON) */ 393 ret = rt8973a_muic_set_path(info, con_sw, attached); 394 if (ret < 0) 395 return ret; 396 397 /* Change the state of external accessory */ 398 extcon_set_state_sync(info->edev, id, attached); 399 if (id == EXTCON_USB) 400 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 401 attached); 402 403 return 0; 404 } 405 406 static void rt8973a_muic_irq_work(struct work_struct *work) 407 { 408 struct rt8973a_muic_info *info = container_of(work, 409 struct rt8973a_muic_info, irq_work); 410 int ret = 0; 411 412 if (!info->edev) 413 return; 414 415 mutex_lock(&info->mutex); 416 417 /* Detect attached or detached cables */ 418 if (info->irq_attach) { 419 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); 420 info->irq_attach = false; 421 } 422 423 if (info->irq_detach) { 424 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); 425 info->irq_detach = false; 426 } 427 428 if (info->irq_ovp) { 429 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); 430 info->irq_ovp = false; 431 } 432 433 if (info->irq_otp) { 434 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); 435 info->irq_otp = false; 436 } 437 438 if (ret < 0) 439 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 440 441 mutex_unlock(&info->mutex); 442 } 443 444 static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) 445 { 446 struct rt8973a_muic_info *info = data; 447 int i, irq_type = -1; 448 449 for (i = 0; i < info->num_muic_irqs; i++) 450 if (irq == info->muic_irqs[i].virq) 451 irq_type = info->muic_irqs[i].irq; 452 453 switch (irq_type) { 454 case RT8973A_INT1_ATTACH: 455 info->irq_attach = true; 456 break; 457 case RT8973A_INT1_DETACH: 458 info->irq_detach = true; 459 break; 460 case RT8973A_INT1_OVP: 461 info->irq_ovp = true; 462 break; 463 case RT8973A_INT1_OTP: 464 info->irq_otp = true; 465 break; 466 case RT8973A_INT1_CHGDET: 467 case RT8973A_INT1_DCD_T: 468 case RT8973A_INT1_CONNECT: 469 case RT8973A_INT1_ADC_CHG: 470 case RT8973A_INT2_UVLO: 471 case RT8973A_INT2_POR: 472 case RT8973A_INT2_OTP_FET: 473 case RT8973A_INT2_OVP_FET: 474 case RT8973A_INT2_OCP_LATCH: 475 case RT8973A_INT2_OCP: 476 case RT8973A_INT2_OVP_OCP: 477 default: 478 dev_dbg(info->dev, 479 "Cannot handle this interrupt (%d)\n", irq_type); 480 break; 481 } 482 483 schedule_work(&info->irq_work); 484 485 return IRQ_HANDLED; 486 } 487 488 static void rt8973a_muic_detect_cable_wq(struct work_struct *work) 489 { 490 struct rt8973a_muic_info *info = container_of(to_delayed_work(work), 491 struct rt8973a_muic_info, wq_detcable); 492 int ret; 493 494 /* Notify the state of connector cable or not */ 495 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); 496 if (ret < 0) 497 dev_warn(info->dev, "failed to detect cable state\n"); 498 } 499 500 static void rt8973a_init_dev_type(struct rt8973a_muic_info *info) 501 { 502 unsigned int data, vendor_id, version_id; 503 int i, ret; 504 505 /* To test I2C, Print version_id and vendor_id of RT8973A */ 506 ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data); 507 if (ret) { 508 dev_err(info->dev, 509 "failed to read DEVICE_ID register: %d\n", ret); 510 return; 511 } 512 513 vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >> 514 RT8973A_REG_DEVICE_ID_VENDOR_SHIFT); 515 version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >> 516 RT8973A_REG_DEVICE_ID_VERSION_SHIFT); 517 518 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", 519 version_id, vendor_id); 520 521 /* Initiazle the register of RT8973A device to bring-up */ 522 for (i = 0; i < info->num_reg_data; i++) { 523 u8 reg = info->reg_data[i].reg; 524 u8 mask = info->reg_data[i].mask; 525 u8 val = 0; 526 527 if (info->reg_data[i].invert) 528 val = ~info->reg_data[i].val; 529 else 530 val = info->reg_data[i].val; 531 532 regmap_update_bits(info->regmap, reg, mask, val); 533 } 534 535 /* Check whether RT8973A is auto switching mode or not */ 536 ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data); 537 if (ret) { 538 dev_err(info->dev, 539 "failed to read CONTROL1 register: %d\n", ret); 540 return; 541 } 542 543 data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK; 544 if (data) { 545 info->auto_config = true; 546 dev_info(info->dev, 547 "Enable Auto-configuration for internal path\n"); 548 } 549 } 550 551 static int rt8973a_muic_i2c_probe(struct i2c_client *i2c, 552 const struct i2c_device_id *id) 553 { 554 struct device_node *np = i2c->dev.of_node; 555 struct rt8973a_muic_info *info; 556 int i, ret, irq_flags; 557 558 if (!np) 559 return -EINVAL; 560 561 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); 562 if (!info) 563 return -ENOMEM; 564 i2c_set_clientdata(i2c, info); 565 566 info->dev = &i2c->dev; 567 info->i2c = i2c; 568 info->irq = i2c->irq; 569 info->muic_irqs = rt8973a_muic_irqs; 570 info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs); 571 info->reg_data = rt8973a_reg_data; 572 info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data); 573 574 mutex_init(&info->mutex); 575 576 INIT_WORK(&info->irq_work, rt8973a_muic_irq_work); 577 578 info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config); 579 if (IS_ERR(info->regmap)) { 580 ret = PTR_ERR(info->regmap); 581 dev_err(info->dev, "failed to allocate register map: %d\n", 582 ret); 583 return ret; 584 } 585 586 /* Support irq domain for RT8973A MUIC device */ 587 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; 588 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, 589 &rt8973a_muic_irq_chip, &info->irq_data); 590 if (ret != 0) { 591 dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n", 592 info->irq, ret); 593 return ret; 594 } 595 596 for (i = 0; i < info->num_muic_irqs; i++) { 597 struct muic_irq *muic_irq = &info->muic_irqs[i]; 598 int virq = 0; 599 600 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); 601 if (virq <= 0) 602 return -EINVAL; 603 muic_irq->virq = virq; 604 605 ret = devm_request_threaded_irq(info->dev, virq, NULL, 606 rt8973a_muic_irq_handler, 607 IRQF_NO_SUSPEND | IRQF_ONESHOT, 608 muic_irq->name, info); 609 if (ret) { 610 dev_err(info->dev, 611 "failed: irq request (IRQ: %d, error :%d)\n", 612 muic_irq->irq, ret); 613 return ret; 614 } 615 } 616 617 /* Allocate extcon device */ 618 info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable); 619 if (IS_ERR(info->edev)) { 620 dev_err(info->dev, "failed to allocate memory for extcon\n"); 621 return -ENOMEM; 622 } 623 624 /* Register extcon device */ 625 ret = devm_extcon_dev_register(info->dev, info->edev); 626 if (ret) { 627 dev_err(info->dev, "failed to register extcon device\n"); 628 return ret; 629 } 630 631 /* 632 * Detect accessory after completing the initialization of platform 633 * 634 * - Use delayed workqueue to detect cable state and then 635 * notify cable state to notifiee/platform through uevent. 636 * After completing the booting of platform, the extcon provider 637 * driver should notify cable state to upper layer. 638 */ 639 INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq); 640 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 641 msecs_to_jiffies(DELAY_MS_DEFAULT)); 642 643 /* Initialize RT8973A device and print vendor id and version id */ 644 rt8973a_init_dev_type(info); 645 646 return 0; 647 } 648 649 static int rt8973a_muic_i2c_remove(struct i2c_client *i2c) 650 { 651 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 652 653 regmap_del_irq_chip(info->irq, info->irq_data); 654 655 return 0; 656 } 657 658 static const struct of_device_id rt8973a_dt_match[] = { 659 { .compatible = "richtek,rt8973a-muic" }, 660 { }, 661 }; 662 MODULE_DEVICE_TABLE(of, rt8973a_dt_match); 663 664 #ifdef CONFIG_PM_SLEEP 665 static int rt8973a_muic_suspend(struct device *dev) 666 { 667 struct i2c_client *i2c = to_i2c_client(dev); 668 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 669 670 enable_irq_wake(info->irq); 671 672 return 0; 673 } 674 675 static int rt8973a_muic_resume(struct device *dev) 676 { 677 struct i2c_client *i2c = to_i2c_client(dev); 678 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 679 680 disable_irq_wake(info->irq); 681 682 return 0; 683 } 684 #endif 685 686 static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops, 687 rt8973a_muic_suspend, rt8973a_muic_resume); 688 689 static const struct i2c_device_id rt8973a_i2c_id[] = { 690 { "rt8973a", TYPE_RT8973A }, 691 { } 692 }; 693 MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id); 694 695 static struct i2c_driver rt8973a_muic_i2c_driver = { 696 .driver = { 697 .name = "rt8973a", 698 .pm = &rt8973a_muic_pm_ops, 699 .of_match_table = rt8973a_dt_match, 700 }, 701 .probe = rt8973a_muic_i2c_probe, 702 .remove = rt8973a_muic_i2c_remove, 703 .id_table = rt8973a_i2c_id, 704 }; 705 706 static int __init rt8973a_muic_i2c_init(void) 707 { 708 return i2c_add_driver(&rt8973a_muic_i2c_driver); 709 } 710 subsys_initcall(rt8973a_muic_i2c_init); 711 712 MODULE_DESCRIPTION("Richtek RT8973A Extcon driver"); 713 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 714 MODULE_LICENSE("GPL"); 715