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