extcon-sm5502.c 17.9 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
/*
 * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
 *
 * Copyright (c) 2014 Samsung Electronics Co., Ltd
 * Author: Chanwoo Choi <cw00.choi@samsung.com>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/extcon.h>
#include <linux/extcon/sm5502.h>

31 32
#define	DELAY_MS_DEFAULT		17000	/* unit: millisecond */

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
struct muic_irq {
	unsigned int irq;
	const char *name;
	unsigned int virq;
};

struct reg_data {
	u8 reg;
	unsigned int val;
	bool invert;
};

struct sm5502_muic_info {
	struct device *dev;
	struct extcon_dev *edev;

	struct i2c_client *i2c;
	struct regmap *regmap;

	struct regmap_irq_chip_data *irq_data;
	struct muic_irq *muic_irqs;
	unsigned int num_muic_irqs;
	int irq;
	bool irq_attach;
	bool irq_detach;
	struct work_struct irq_work;

	struct reg_data *reg_data;
	unsigned int num_reg_data;

	struct mutex mutex;
64 65 66 67 68 69 70 71

	/*
	 * Use delayed workqueue to detect cable state and then
	 * notify cable state to notifiee/platform through uevent.
	 * After completing the booting of platform, the extcon provider
	 * driver should notify cable state to upper layer.
	 */
	struct delayed_work wq_detcable;
72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353
};

/* Default value of SM5502 register to bring up MUIC device. */
static struct reg_data sm5502_reg_data[] = {
	{
		.reg = SM5502_REG_CONTROL,
		.val = SM5502_REG_CONTROL_MASK_INT_MASK,
		.invert = false,
	}, {
		.reg = SM5502_REG_INTMASK1,
		.val = SM5502_REG_INTM1_KP_MASK
			| SM5502_REG_INTM1_LKP_MASK
			| SM5502_REG_INTM1_LKR_MASK,
		.invert = true,
	}, {
		.reg = SM5502_REG_INTMASK2,
		.val = SM5502_REG_INTM2_VBUS_DET_MASK
			| SM5502_REG_INTM2_REV_ACCE_MASK
			| SM5502_REG_INTM2_ADC_CHG_MASK
			| SM5502_REG_INTM2_STUCK_KEY_MASK
			| SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
			| SM5502_REG_INTM2_MHL_MASK,
		.invert = true,
	},
	{ }
};

/* List of detectable cables */
enum {
	EXTCON_CABLE_USB = 0,
	EXTCON_CABLE_USB_HOST,
	EXTCON_CABLE_TA,

	EXTCON_CABLE_END,
};

static const char *sm5502_extcon_cable[] = {
	[EXTCON_CABLE_USB]	= "USB",
	[EXTCON_CABLE_USB_HOST]	= "USB-Host",
	[EXTCON_CABLE_TA]	= "TA",
	NULL,
};

/* Define supported accessory type */
enum sm5502_muic_acc_type {
	SM5502_MUIC_ADC_GROUND = 0x0,
	SM5502_MUIC_ADC_SEND_END_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
	SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
	SM5502_MUIC_ADC_RESERVED_ACC_1,
	SM5502_MUIC_ADC_RESERVED_ACC_2,
	SM5502_MUIC_ADC_RESERVED_ACC_3,
	SM5502_MUIC_ADC_RESERVED_ACC_4,
	SM5502_MUIC_ADC_RESERVED_ACC_5,
	SM5502_MUIC_ADC_AUDIO_TYPE2,
	SM5502_MUIC_ADC_PHONE_POWERED_DEV,
	SM5502_MUIC_ADC_TTY_CONVERTER,
	SM5502_MUIC_ADC_UART_CABLE,
	SM5502_MUIC_ADC_TYPE1_CHARGER,
	SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
	SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
	SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
	SM5502_MUIC_ADC_TYPE2_CHARGER,
	SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
	SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
	SM5502_MUIC_ADC_AUDIO_TYPE1,
	SM5502_MUIC_ADC_OPEN = 0x1f,

	/* The below accessories have same ADC value (0x1f or 0x1e).
	   So, Device type1 is used to separate specific accessory. */
							/* |---------|--ADC| */
							/* |    [7:5]|[4:0]| */
	SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e,	/* |      001|11110| */
	SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,	/* |      010|11110| */
							/* |Dev Type1|--ADC| */
	SM5502_MUIC_ADC_OPEN_USB = 0x5f,		/* |      010|11111| */
	SM5502_MUIC_ADC_OPEN_TA = 0xdf,			/* |      110|11111| */
	SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,		/* |      111|11111| */
};

/* List of supported interrupt for SM5502 */
static struct muic_irq sm5502_muic_irqs[] = {
	{ SM5502_IRQ_INT1_ATTACH,	"muic-attach" },
	{ SM5502_IRQ_INT1_DETACH,	"muic-detach" },
	{ SM5502_IRQ_INT1_KP,		"muic-kp" },
	{ SM5502_IRQ_INT1_LKP,		"muic-lkp" },
	{ SM5502_IRQ_INT1_LKR,		"muic-lkr" },
	{ SM5502_IRQ_INT1_OVP_EVENT,	"muic-ovp-event" },
	{ SM5502_IRQ_INT1_OCP_EVENT,	"muic-ocp-event" },
	{ SM5502_IRQ_INT1_OVP_OCP_DIS,	"muic-ovp-ocp-dis" },
	{ SM5502_IRQ_INT2_VBUS_DET,	"muic-vbus-det" },
	{ SM5502_IRQ_INT2_REV_ACCE,	"muic-rev-acce" },
	{ SM5502_IRQ_INT2_ADC_CHG,	"muic-adc-chg" },
	{ SM5502_IRQ_INT2_STUCK_KEY,	"muic-stuck-key" },
	{ SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
	{ SM5502_IRQ_INT2_MHL,		"muic-mhl" },
};

/* Define interrupt list of SM5502 to register regmap_irq */
static const struct regmap_irq sm5502_irqs[] = {
	/* INT1 interrupts */
	{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
	{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
	{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
	{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
	{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
	{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
	{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
	{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },

	/* INT2 interrupts */
	{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
	{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
	{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
	{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
	{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
	{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
};

static const struct regmap_irq_chip sm5502_muic_irq_chip = {
	.name			= "sm5502",
	.status_base		= SM5502_REG_INT1,
	.mask_base		= SM5502_REG_INTMASK1,
	.mask_invert		= false,
	.num_regs		= 2,
	.irqs			= sm5502_irqs,
	.num_irqs		= ARRAY_SIZE(sm5502_irqs),
};

/* Define regmap configuration of SM5502 for I2C communication  */
static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case SM5502_REG_INTMASK1:
	case SM5502_REG_INTMASK2:
		return true;
	default:
		break;
	}
	return false;
}

static const struct regmap_config sm5502_muic_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.volatile_reg	= sm5502_muic_volatile_reg,
	.max_register	= SM5502_REG_END,
};

/* Return cable type of attached or detached accessories */
static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
{
	unsigned int cable_type = -1, adc, dev_type1;
	int ret;

	/* Read ADC value according to external cable or button */
	ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
	if (ret) {
		dev_err(info->dev, "failed to read ADC register\n");
		return ret;
	}

	/*
	 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
	 * connected with to MUIC device.
	 */
	cable_type &= SM5502_REG_ADC_MASK;
	if (cable_type == SM5502_MUIC_ADC_GROUND)
		return SM5502_MUIC_ADC_GROUND;

	switch (cable_type) {
	case SM5502_MUIC_ADC_GROUND:
	case SM5502_MUIC_ADC_SEND_END_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
	case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
	case SM5502_MUIC_ADC_RESERVED_ACC_1:
	case SM5502_MUIC_ADC_RESERVED_ACC_2:
	case SM5502_MUIC_ADC_RESERVED_ACC_3:
	case SM5502_MUIC_ADC_RESERVED_ACC_4:
	case SM5502_MUIC_ADC_RESERVED_ACC_5:
	case SM5502_MUIC_ADC_AUDIO_TYPE2:
	case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
	case SM5502_MUIC_ADC_TTY_CONVERTER:
	case SM5502_MUIC_ADC_UART_CABLE:
	case SM5502_MUIC_ADC_TYPE1_CHARGER:
	case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
	case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
	case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
	case SM5502_MUIC_ADC_TYPE2_CHARGER:
	case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
	case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
		break;
	case SM5502_MUIC_ADC_AUDIO_TYPE1:
		/*
		 * Check whether cable type is
		 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
		 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
		 * by using Button event.
		 */
		break;
	case SM5502_MUIC_ADC_OPEN:
		ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
				  &dev_type1);
		if (ret) {
			dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
			return ret;
		}

		switch (dev_type1) {
		case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
			cable_type = SM5502_MUIC_ADC_OPEN_USB;
			break;
		case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
			cable_type = SM5502_MUIC_ADC_OPEN_TA;
			break;
		case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
			cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
			break;
		default:
			dev_dbg(info->dev,
				"cannot identify the cable type: adc(0x%x) "
				"dev_type1(0x%x)\n", adc, dev_type1);
			return -EINVAL;
		};
		break;
	default:
		dev_err(info->dev,
			"failed to identify the cable type: adc(0x%x)\n", adc);
		return -EINVAL;
	};

	return cable_type;
}

static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
				     bool attached)
{
	static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
	const char **cable_names = info->edev->supported_cable;
	unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
	unsigned int idx = 0;

	if (!cable_names)
		return 0;

	/* Get the type of attached or detached cable */
	if (attached)
		cable_type = sm5502_muic_get_cable_type(info);
	else if (!attached)
		cable_type = prev_cable_type;
	prev_cable_type = cable_type;

	switch (cable_type) {
	case SM5502_MUIC_ADC_OPEN_USB:
		idx = EXTCON_CABLE_USB;
		break;
	case SM5502_MUIC_ADC_OPEN_TA:
		idx = EXTCON_CABLE_TA;
		break;
	case SM5502_MUIC_ADC_OPEN_USB_OTG:
		idx = EXTCON_CABLE_USB_HOST;
		break;
354 355
	case SM5502_MUIC_ADC_GROUND:
		break;
356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447
	default:
		dev_dbg(info->dev,
			"cannot handle this cable_type (0x%x)\n", cable_type);
		return 0;
	};

	extcon_set_cable_state(info->edev, cable_names[idx], attached);

	return 0;
}

static void sm5502_muic_irq_work(struct work_struct *work)
{
	struct sm5502_muic_info *info = container_of(work,
			struct sm5502_muic_info, irq_work);
	int ret = 0;

	if (!info->edev)
		return;

	mutex_lock(&info->mutex);

	/* Detect attached or detached cables */
	if (info->irq_attach) {
		ret = sm5502_muic_cable_handler(info, true);
		info->irq_attach = false;
	}
	if (info->irq_detach) {
		ret = sm5502_muic_cable_handler(info, false);
		info->irq_detach = false;
	}

	if (ret < 0)
		dev_err(info->dev, "failed to handle MUIC interrupt\n");

	mutex_unlock(&info->mutex);

	return;
}

/*
 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
 */
static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
{
	switch (irq_type) {
	case SM5502_IRQ_INT1_ATTACH:
		info->irq_attach = true;
		break;
	case SM5502_IRQ_INT1_DETACH:
		info->irq_detach = true;
		break;
	case SM5502_IRQ_INT1_KP:
	case SM5502_IRQ_INT1_LKP:
	case SM5502_IRQ_INT1_LKR:
	case SM5502_IRQ_INT1_OVP_EVENT:
	case SM5502_IRQ_INT1_OCP_EVENT:
	case SM5502_IRQ_INT1_OVP_OCP_DIS:
	case SM5502_IRQ_INT2_VBUS_DET:
	case SM5502_IRQ_INT2_REV_ACCE:
	case SM5502_IRQ_INT2_ADC_CHG:
	case SM5502_IRQ_INT2_STUCK_KEY:
	case SM5502_IRQ_INT2_STUCK_KEY_RCV:
	case SM5502_IRQ_INT2_MHL:
	default:
		break;
	}

	return 0;
}

static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
{
	struct sm5502_muic_info *info = data;
	int i, irq_type = -1, ret;

	for (i = 0; i < info->num_muic_irqs; i++)
		if (irq == info->muic_irqs[i].virq)
			irq_type = info->muic_irqs[i].irq;

	ret = sm5502_parse_irq(info, irq_type);
	if (ret < 0) {
		dev_warn(info->dev, "cannot handle is interrupt:%d\n",
				    irq_type);
		return IRQ_HANDLED;
	}
	schedule_work(&info->irq_work);

	return IRQ_HANDLED;
}

448 449 450 451 452 453 454 455 456 457 458 459
static void sm5502_muic_detect_cable_wq(struct work_struct *work)
{
	struct sm5502_muic_info *info = container_of(to_delayed_work(work),
				struct sm5502_muic_info, wq_detcable);
	int ret;

	/* Notify the state of connector cable or not  */
	ret = sm5502_muic_cable_handler(info, true);
	if (ret < 0)
		dev_warn(info->dev, "failed to detect cable state\n");
}

460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572
static void sm5502_init_dev_type(struct sm5502_muic_info *info)
{
	unsigned int reg_data, vendor_id, version_id;
	int i, ret;

	/* To test I2C, Print version_id and vendor_id of SM5502 */
	ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
	if (ret) {
		dev_err(info->dev,
			"failed to read DEVICE_ID register: %d\n", ret);
		return;
	}

	vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
				SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
	version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
				SM5502_REG_DEVICE_ID_VERSION_SHIFT);

	dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
			    version_id, vendor_id);

	/* Initiazle the register of SM5502 device to bring-up */
	for (i = 0; i < info->num_reg_data; i++) {
		unsigned int val = 0;

		if (!info->reg_data[i].invert)
			val |= ~info->reg_data[i].val;
		else
			val = info->reg_data[i].val;
		regmap_write(info->regmap, info->reg_data[i].reg, val);
	}
}

static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
				 const struct i2c_device_id *id)
{
	struct device_node *np = i2c->dev.of_node;
	struct sm5502_muic_info *info;
	int i, ret, irq_flags;

	if (!np)
		return -EINVAL;

	info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;
	i2c_set_clientdata(i2c, info);

	info->dev = &i2c->dev;
	info->i2c = i2c;
	info->irq = i2c->irq;
	info->muic_irqs = sm5502_muic_irqs;
	info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
	info->reg_data = sm5502_reg_data;
	info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);

	mutex_init(&info->mutex);

	INIT_WORK(&info->irq_work, sm5502_muic_irq_work);

	info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
	if (IS_ERR(info->regmap)) {
		ret = PTR_ERR(info->regmap);
		dev_err(info->dev, "failed to allocate register map: %d\n",
				   ret);
		return ret;
	}

	/* Support irq domain for SM5502 MUIC device */
	irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
	ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
				  &sm5502_muic_irq_chip, &info->irq_data);
	if (ret != 0) {
		dev_err(info->dev, "failed to request IRQ %d: %d\n",
				    info->irq, ret);
		return ret;
	}

	for (i = 0; i < info->num_muic_irqs; i++) {
		struct muic_irq *muic_irq = &info->muic_irqs[i];
		unsigned int virq = 0;

		virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
		if (virq <= 0)
			return -EINVAL;
		muic_irq->virq = virq;

		ret = devm_request_threaded_irq(info->dev, virq, NULL,
						sm5502_muic_irq_handler,
						IRQF_NO_SUSPEND,
						muic_irq->name, info);
		if (ret) {
			dev_err(info->dev, "failed: irq request (IRQ: %d,"
				" error :%d)\n", muic_irq->irq, ret);
			return ret;
		}
	}

	/* Allocate extcon device */
	info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
	if (IS_ERR(info->edev)) {
		dev_err(info->dev, "failed to allocate memory for extcon\n");
		return -ENOMEM;
	}
	info->edev->name = np->name;

	/* Register extcon device */
	ret = devm_extcon_dev_register(info->dev, info->edev);
	if (ret) {
		dev_err(info->dev, "failed to register extcon device\n");
		return ret;
	}

573 574 575 576 577 578 579 580 581 582 583 584
	/*
	 * Detect accessory after completing the initialization of platform
	 *
	 * - Use delayed workqueue to detect cable state and then
	 * notify cable state to notifiee/platform through uevent.
	 * After completing the booting of platform, the extcon provider
	 * driver should notify cable state to upper layer.
	 */
	INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
	queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
			msecs_to_jiffies(DELAY_MS_DEFAULT));

585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
	/* Initialize SM5502 device and print vendor id and version id */
	sm5502_init_dev_type(info);

	return 0;
}

static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
{
	struct sm5502_muic_info *info = i2c_get_clientdata(i2c);

	regmap_del_irq_chip(info->irq, info->irq_data);

	return 0;
}

static struct of_device_id sm5502_dt_match[] = {
	{ .compatible = "siliconmitus,sm5502-muic" },
	{ },
};

#ifdef CONFIG_PM_SLEEP
static int sm5502_muic_suspend(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct sm5502_muic_info *info = i2c_get_clientdata(i2c);

	enable_irq_wake(info->irq);

	return 0;
}

static int sm5502_muic_resume(struct device *dev)
{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct sm5502_muic_info *info = i2c_get_clientdata(i2c);

	disable_irq_wake(info->irq);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
			 sm5502_muic_suspend, sm5502_muic_resume);

static const struct i2c_device_id sm5502_i2c_id[] = {
	{ "sm5502", TYPE_SM5502 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);

static struct i2c_driver sm5502_muic_i2c_driver = {
	.driver		= {
		.name	= "sm5502",
		.owner	= THIS_MODULE,
		.pm	= &sm5502_muic_pm_ops,
		.of_match_table = sm5502_dt_match,
	},
	.probe	= sm5022_muic_i2c_probe,
	.remove	= sm5502_muic_i2c_remove,
	.id_table = sm5502_i2c_id,
};

static int __init sm5502_muic_i2c_init(void)
{
	return i2c_add_driver(&sm5502_muic_i2c_driver);
}
subsys_initcall(sm5502_muic_i2c_init);

MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
MODULE_LICENSE("GPL");