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_SDP, 97 EXTCON_CHG_USB_DCP, 98 EXTCON_JIG, 99 EXTCON_NONE, 100 }; 101 102 /* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */ 103 enum rt8973a_event_type { 104 RT8973A_EVENT_ATTACH = 1, 105 RT8973A_EVENT_DETACH, 106 RT8973A_EVENT_OVP, 107 RT8973A_EVENT_OTP, 108 }; 109 110 /* Define supported accessory type */ 111 enum rt8973a_muic_acc_type { 112 RT8973A_MUIC_ADC_OTG = 0x0, 113 RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, 114 RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, 115 RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, 116 RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, 117 RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, 118 RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, 119 RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, 120 RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, 121 RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, 122 RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, 123 RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, 124 RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, 125 RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, 126 RT8973A_MUIC_ADC_RESERVED_ACC_1, 127 RT8973A_MUIC_ADC_RESERVED_ACC_2, 128 RT8973A_MUIC_ADC_RESERVED_ACC_3, 129 RT8973A_MUIC_ADC_RESERVED_ACC_4, 130 RT8973A_MUIC_ADC_RESERVED_ACC_5, 131 RT8973A_MUIC_ADC_AUDIO_TYPE2, 132 RT8973A_MUIC_ADC_PHONE_POWERED_DEV, 133 RT8973A_MUIC_ADC_UNKNOWN_ACC_1, 134 RT8973A_MUIC_ADC_UNKNOWN_ACC_2, 135 RT8973A_MUIC_ADC_TA, 136 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, 137 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, 138 RT8973A_MUIC_ADC_UNKNOWN_ACC_3, 139 RT8973A_MUIC_ADC_UNKNOWN_ACC_4, 140 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, 141 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, 142 RT8973A_MUIC_ADC_UNKNOWN_ACC_5, 143 RT8973A_MUIC_ADC_OPEN = 0x1f, 144 145 /* The below accessories has same ADC value (0x1f). 146 So, Device type1 is used to separate specific accessory. */ 147 /* |---------|--ADC| */ 148 /* | [7:5]|[4:0]| */ 149 RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */ 150 }; 151 152 /* List of supported interrupt for RT8973A */ 153 static struct muic_irq rt8973a_muic_irqs[] = { 154 { RT8973A_INT1_ATTACH, "muic-attach" }, 155 { RT8973A_INT1_DETACH, "muic-detach" }, 156 { RT8973A_INT1_CHGDET, "muic-chgdet" }, 157 { RT8973A_INT1_DCD_T, "muic-dcd-t" }, 158 { RT8973A_INT1_OVP, "muic-ovp" }, 159 { RT8973A_INT1_CONNECT, "muic-connect" }, 160 { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, 161 { RT8973A_INT1_OTP, "muic-otp" }, 162 { RT8973A_INT2_UVLO, "muic-uvlo" }, 163 { RT8973A_INT2_POR, "muic-por" }, 164 { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, 165 { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, 166 { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, 167 { RT8973A_INT2_OCP, "muic-ocp" }, 168 { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" }, 169 }; 170 171 /* Define interrupt list of RT8973A to register regmap_irq */ 172 static const struct regmap_irq rt8973a_irqs[] = { 173 /* INT1 interrupts */ 174 { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, 175 { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, 176 { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, 177 { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, 178 { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, 179 { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, 180 { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, 181 { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, 182 183 /* INT2 interrupts */ 184 { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, 185 { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, 186 { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, 187 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, 188 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, 189 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, 190 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, }, 191 }; 192 193 static const struct regmap_irq_chip rt8973a_muic_irq_chip = { 194 .name = "rt8973a", 195 .status_base = RT8973A_REG_INT1, 196 .mask_base = RT8973A_REG_INTM1, 197 .mask_invert = false, 198 .num_regs = 2, 199 .irqs = rt8973a_irqs, 200 .num_irqs = ARRAY_SIZE(rt8973a_irqs), 201 }; 202 203 /* Define regmap configuration of RT8973A for I2C communication */ 204 static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) 205 { 206 switch (reg) { 207 case RT8973A_REG_INTM1: 208 case RT8973A_REG_INTM2: 209 return true; 210 default: 211 break; 212 } 213 return false; 214 } 215 216 static const struct regmap_config rt8973a_muic_regmap_config = { 217 .reg_bits = 8, 218 .val_bits = 8, 219 .volatile_reg = rt8973a_muic_volatile_reg, 220 .max_register = RT8973A_REG_END, 221 }; 222 223 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ 224 static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, 225 unsigned int con_sw, bool attached) 226 { 227 int ret; 228 229 /* 230 * Don't need to set h/w path according to cable type 231 * if Auto-configuration mode of CONTROL1 register is true. 232 */ 233 if (info->auto_config) 234 return 0; 235 236 if (!attached) 237 con_sw = DM_DP_SWITCH_UART; 238 239 switch (con_sw) { 240 case DM_DP_SWITCH_OPEN: 241 case DM_DP_SWITCH_USB: 242 case DM_DP_SWITCH_UART: 243 ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, 244 RT8973A_REG_MANUAL_SW1_DP_MASK | 245 RT8973A_REG_MANUAL_SW1_DM_MASK, 246 con_sw); 247 if (ret < 0) { 248 dev_err(info->dev, 249 "cannot update DM_CON/DP_CON switch\n"); 250 return ret; 251 } 252 break; 253 default: 254 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", 255 con_sw); 256 return -EINVAL; 257 } 258 259 return 0; 260 } 261 262 static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) 263 { 264 unsigned int adc, dev1; 265 int ret, cable_type; 266 267 /* Read ADC value according to external cable or button */ 268 ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); 269 if (ret) { 270 dev_err(info->dev, "failed to read ADC register\n"); 271 return ret; 272 } 273 cable_type = adc & RT8973A_REG_ADC_MASK; 274 275 /* Read Device 1 reigster to identify correct cable type */ 276 ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); 277 if (ret) { 278 dev_err(info->dev, "failed to read DEV1 register\n"); 279 return ret; 280 } 281 282 switch (adc) { 283 case RT8973A_MUIC_ADC_OPEN: 284 if (dev1 & RT8973A_REG_DEV1_USB_MASK) 285 cable_type = RT8973A_MUIC_ADC_USB; 286 else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) 287 cable_type = RT8973A_MUIC_ADC_TA; 288 else 289 cable_type = RT8973A_MUIC_ADC_OPEN; 290 break; 291 default: 292 break; 293 } 294 295 return cable_type; 296 } 297 298 static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, 299 enum rt8973a_event_type event) 300 { 301 static unsigned int prev_cable_type; 302 unsigned int con_sw = DM_DP_SWITCH_UART; 303 int ret, cable_type; 304 unsigned int id; 305 bool attached = false; 306 307 switch (event) { 308 case RT8973A_EVENT_ATTACH: 309 cable_type = rt8973a_muic_get_cable_type(info); 310 attached = true; 311 break; 312 case RT8973A_EVENT_DETACH: 313 cable_type = prev_cable_type; 314 attached = false; 315 break; 316 case RT8973A_EVENT_OVP: 317 case RT8973A_EVENT_OTP: 318 dev_warn(info->dev, 319 "happen Over %s issue. Need to disconnect all cables\n", 320 event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); 321 cable_type = prev_cable_type; 322 attached = false; 323 break; 324 default: 325 dev_err(info->dev, 326 "Cannot handle this event (event:%d)\n", event); 327 return -EINVAL; 328 } 329 prev_cable_type = cable_type; 330 331 switch (cable_type) { 332 case RT8973A_MUIC_ADC_OTG: 333 id = EXTCON_USB_HOST; 334 con_sw = DM_DP_SWITCH_USB; 335 break; 336 case RT8973A_MUIC_ADC_TA: 337 id = EXTCON_CHG_USB_DCP; 338 con_sw = DM_DP_SWITCH_OPEN; 339 break; 340 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: 341 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: 342 id = EXTCON_JIG; 343 con_sw = DM_DP_SWITCH_USB; 344 break; 345 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: 346 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: 347 id = EXTCON_JIG; 348 con_sw = DM_DP_SWITCH_UART; 349 break; 350 case RT8973A_MUIC_ADC_USB: 351 id = EXTCON_USB; 352 con_sw = DM_DP_SWITCH_USB; 353 break; 354 case RT8973A_MUIC_ADC_OPEN: 355 return 0; 356 case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: 357 case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: 358 case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: 359 case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: 360 case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: 361 dev_warn(info->dev, 362 "Unknown accessory type (adc:0x%x)\n", cable_type); 363 return 0; 364 case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: 365 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: 366 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: 367 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: 368 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: 369 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: 370 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: 371 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: 372 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: 373 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: 374 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: 375 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: 376 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: 377 case RT8973A_MUIC_ADC_AUDIO_TYPE2: 378 dev_warn(info->dev, 379 "Audio device/button type (adc:0x%x)\n", cable_type); 380 return 0; 381 case RT8973A_MUIC_ADC_RESERVED_ACC_1: 382 case RT8973A_MUIC_ADC_RESERVED_ACC_2: 383 case RT8973A_MUIC_ADC_RESERVED_ACC_3: 384 case RT8973A_MUIC_ADC_RESERVED_ACC_4: 385 case RT8973A_MUIC_ADC_RESERVED_ACC_5: 386 case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: 387 return 0; 388 default: 389 dev_err(info->dev, 390 "Cannot handle this cable_type (adc:0x%x)\n", 391 cable_type); 392 return -EINVAL; 393 } 394 395 /* Change internal hardware path(DM_CON/DP_CON) */ 396 ret = rt8973a_muic_set_path(info, con_sw, attached); 397 if (ret < 0) 398 return ret; 399 400 /* Change the state of external accessory */ 401 extcon_set_cable_state_(info->edev, id, attached); 402 if (id == EXTCON_USB) 403 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SDP, 404 attached); 405 406 return 0; 407 } 408 409 static void rt8973a_muic_irq_work(struct work_struct *work) 410 { 411 struct rt8973a_muic_info *info = container_of(work, 412 struct rt8973a_muic_info, irq_work); 413 int ret = 0; 414 415 if (!info->edev) 416 return; 417 418 mutex_lock(&info->mutex); 419 420 /* Detect attached or detached cables */ 421 if (info->irq_attach) { 422 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); 423 info->irq_attach = false; 424 } 425 426 if (info->irq_detach) { 427 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); 428 info->irq_detach = false; 429 } 430 431 if (info->irq_ovp) { 432 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); 433 info->irq_ovp = false; 434 } 435 436 if (info->irq_otp) { 437 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); 438 info->irq_otp = false; 439 } 440 441 if (ret < 0) 442 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 443 444 mutex_unlock(&info->mutex); 445 } 446 447 static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) 448 { 449 struct rt8973a_muic_info *info = data; 450 int i, irq_type = -1; 451 452 for (i = 0; i < info->num_muic_irqs; i++) 453 if (irq == info->muic_irqs[i].virq) 454 irq_type = info->muic_irqs[i].irq; 455 456 switch (irq_type) { 457 case RT8973A_INT1_ATTACH: 458 info->irq_attach = true; 459 break; 460 case RT8973A_INT1_DETACH: 461 info->irq_detach = true; 462 break; 463 case RT8973A_INT1_OVP: 464 info->irq_ovp = true; 465 break; 466 case RT8973A_INT1_OTP: 467 info->irq_otp = true; 468 break; 469 case RT8973A_INT1_CHGDET: 470 case RT8973A_INT1_DCD_T: 471 case RT8973A_INT1_CONNECT: 472 case RT8973A_INT1_ADC_CHG: 473 case RT8973A_INT2_UVLO: 474 case RT8973A_INT2_POR: 475 case RT8973A_INT2_OTP_FET: 476 case RT8973A_INT2_OVP_FET: 477 case RT8973A_INT2_OCP_LATCH: 478 case RT8973A_INT2_OCP: 479 case RT8973A_INT2_OVP_OCP: 480 default: 481 dev_dbg(info->dev, 482 "Cannot handle this interrupt (%d)\n", irq_type); 483 break; 484 } 485 486 schedule_work(&info->irq_work); 487 488 return IRQ_HANDLED; 489 } 490 491 static void rt8973a_muic_detect_cable_wq(struct work_struct *work) 492 { 493 struct rt8973a_muic_info *info = container_of(to_delayed_work(work), 494 struct rt8973a_muic_info, wq_detcable); 495 int ret; 496 497 /* Notify the state of connector cable or not */ 498 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); 499 if (ret < 0) 500 dev_warn(info->dev, "failed to detect cable state\n"); 501 } 502 503 static void rt8973a_init_dev_type(struct rt8973a_muic_info *info) 504 { 505 unsigned int data, vendor_id, version_id; 506 int i, ret; 507 508 /* To test I2C, Print version_id and vendor_id of RT8973A */ 509 ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data); 510 if (ret) { 511 dev_err(info->dev, 512 "failed to read DEVICE_ID register: %d\n", ret); 513 return; 514 } 515 516 vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >> 517 RT8973A_REG_DEVICE_ID_VENDOR_SHIFT); 518 version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >> 519 RT8973A_REG_DEVICE_ID_VERSION_SHIFT); 520 521 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", 522 version_id, vendor_id); 523 524 /* Initiazle the register of RT8973A device to bring-up */ 525 for (i = 0; i < info->num_reg_data; i++) { 526 u8 reg = info->reg_data[i].reg; 527 u8 mask = info->reg_data[i].mask; 528 u8 val = 0; 529 530 if (info->reg_data[i].invert) 531 val = ~info->reg_data[i].val; 532 else 533 val = info->reg_data[i].val; 534 535 regmap_update_bits(info->regmap, reg, mask, val); 536 } 537 538 /* Check whether RT8973A is auto swithcing mode or not */ 539 ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data); 540 if (ret) { 541 dev_err(info->dev, 542 "failed to read CONTROL1 register: %d\n", ret); 543 return; 544 } 545 546 data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK; 547 if (data) { 548 info->auto_config = true; 549 dev_info(info->dev, 550 "Enable Auto-configuration for internal path\n"); 551 } 552 } 553 554 static int rt8973a_muic_i2c_probe(struct i2c_client *i2c, 555 const struct i2c_device_id *id) 556 { 557 struct device_node *np = i2c->dev.of_node; 558 struct rt8973a_muic_info *info; 559 int i, ret, irq_flags; 560 561 if (!np) 562 return -EINVAL; 563 564 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); 565 if (!info) 566 return -ENOMEM; 567 i2c_set_clientdata(i2c, info); 568 569 info->dev = &i2c->dev; 570 info->i2c = i2c; 571 info->irq = i2c->irq; 572 info->muic_irqs = rt8973a_muic_irqs; 573 info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs); 574 info->reg_data = rt8973a_reg_data; 575 info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data); 576 577 mutex_init(&info->mutex); 578 579 INIT_WORK(&info->irq_work, rt8973a_muic_irq_work); 580 581 info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config); 582 if (IS_ERR(info->regmap)) { 583 ret = PTR_ERR(info->regmap); 584 dev_err(info->dev, "failed to allocate register map: %d\n", 585 ret); 586 return ret; 587 } 588 589 /* Support irq domain for RT8973A MUIC device */ 590 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; 591 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, 592 &rt8973a_muic_irq_chip, &info->irq_data); 593 if (ret != 0) { 594 dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n", 595 info->irq, ret); 596 return ret; 597 } 598 599 for (i = 0; i < info->num_muic_irqs; i++) { 600 struct muic_irq *muic_irq = &info->muic_irqs[i]; 601 int virq = 0; 602 603 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); 604 if (virq <= 0) 605 return -EINVAL; 606 muic_irq->virq = virq; 607 608 ret = devm_request_threaded_irq(info->dev, virq, NULL, 609 rt8973a_muic_irq_handler, 610 IRQF_NO_SUSPEND | IRQF_ONESHOT, 611 muic_irq->name, info); 612 if (ret) { 613 dev_err(info->dev, 614 "failed: irq request (IRQ: %d, error :%d)\n", 615 muic_irq->irq, ret); 616 return ret; 617 } 618 } 619 620 /* Allocate extcon device */ 621 info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable); 622 if (IS_ERR(info->edev)) { 623 dev_err(info->dev, "failed to allocate memory for extcon\n"); 624 return -ENOMEM; 625 } 626 627 /* Register extcon device */ 628 ret = devm_extcon_dev_register(info->dev, info->edev); 629 if (ret) { 630 dev_err(info->dev, "failed to register extcon device\n"); 631 return ret; 632 } 633 634 /* 635 * Detect accessory after completing the initialization of platform 636 * 637 * - Use delayed workqueue to detect cable state and then 638 * notify cable state to notifiee/platform through uevent. 639 * After completing the booting of platform, the extcon provider 640 * driver should notify cable state to upper layer. 641 */ 642 INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq); 643 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 644 msecs_to_jiffies(DELAY_MS_DEFAULT)); 645 646 /* Initialize RT8973A device and print vendor id and version id */ 647 rt8973a_init_dev_type(info); 648 649 return 0; 650 } 651 652 static int rt8973a_muic_i2c_remove(struct i2c_client *i2c) 653 { 654 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 655 656 regmap_del_irq_chip(info->irq, info->irq_data); 657 658 return 0; 659 } 660 661 static const struct of_device_id rt8973a_dt_match[] = { 662 { .compatible = "richtek,rt8973a-muic" }, 663 { }, 664 }; 665 MODULE_DEVICE_TABLE(of, rt8973a_dt_match); 666 667 #ifdef CONFIG_PM_SLEEP 668 static int rt8973a_muic_suspend(struct device *dev) 669 { 670 struct i2c_client *i2c = to_i2c_client(dev); 671 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 672 673 enable_irq_wake(info->irq); 674 675 return 0; 676 } 677 678 static int rt8973a_muic_resume(struct device *dev) 679 { 680 struct i2c_client *i2c = to_i2c_client(dev); 681 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); 682 683 disable_irq_wake(info->irq); 684 685 return 0; 686 } 687 #endif 688 689 static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops, 690 rt8973a_muic_suspend, rt8973a_muic_resume); 691 692 static const struct i2c_device_id rt8973a_i2c_id[] = { 693 { "rt8973a", TYPE_RT8973A }, 694 { } 695 }; 696 MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id); 697 698 static struct i2c_driver rt8973a_muic_i2c_driver = { 699 .driver = { 700 .name = "rt8973a", 701 .pm = &rt8973a_muic_pm_ops, 702 .of_match_table = rt8973a_dt_match, 703 }, 704 .probe = rt8973a_muic_i2c_probe, 705 .remove = rt8973a_muic_i2c_remove, 706 .id_table = rt8973a_i2c_id, 707 }; 708 709 static int __init rt8973a_muic_i2c_init(void) 710 { 711 return i2c_add_driver(&rt8973a_muic_i2c_driver); 712 } 713 subsys_initcall(rt8973a_muic_i2c_init); 714 715 MODULE_DESCRIPTION("Richtek RT8973A Extcon driver"); 716 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 717 MODULE_LICENSE("GPL"); 718