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authorJohannes Berg <johannes@sipsolutions.net>2008-10-27 18:59:26 -0400
committerDavid S. Miller <davem@davemloft.net>2008-10-27 20:06:18 -0400
commite174961ca1a0b28f7abf0be47973ad57cb74e5f0 (patch)
treee8f74ecd420a0e380a71670e5aec5c2a0c15640a /drivers/net/3c509.c
parent0c68ae2605dbcf67414d8d1f19af93be44b355fb (diff)
net: convert print_mac to %pM
This converts pretty much everything to print_mac. There were a few things that had conflicts which I have just dropped for now, no harm done. I've built an allyesconfig with this and looked at the files that weren't built very carefully, but it's a huge patch. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/3c509.c')
-rw-r--r--drivers/net/3c509.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/net/3c509.c b/drivers/net/3c509.c
index 3a7bc524af33..cc970c49fb34 100644
--- a/drivers/net/3c509.c
+++ b/drivers/net/3c509.c
@@ -541,7 +541,6 @@ static int __init el3_common_init(struct net_device *dev)
541{ 541{
542 struct el3_private *lp = netdev_priv(dev); 542 struct el3_private *lp = netdev_priv(dev);
543 int err; 543 int err;
544 DECLARE_MAC_BUF(mac);
545 const char *if_names[] = {"10baseT", "AUI", "undefined", "BNC"}; 544 const char *if_names[] = {"10baseT", "AUI", "undefined", "BNC"};
546 545
547 spin_lock_init(&lp->lock); 546 spin_lock_init(&lp->lock);
@@ -575,9 +574,9 @@ static int __init el3_common_init(struct net_device *dev)
575 } 574 }
576 575
577 printk(KERN_INFO "%s: 3c5x9 found at %#3.3lx, %s port, " 576 printk(KERN_INFO "%s: 3c5x9 found at %#3.3lx, %s port, "
578 "address %s, IRQ %d.\n", 577 "address %pM, IRQ %d.\n",
579 dev->name, dev->base_addr, if_names[(dev->if_port & 0x03)], 578 dev->name, dev->base_addr, if_names[(dev->if_port & 0x03)],
580 print_mac(mac, dev->dev_addr), dev->irq); 579 dev->dev_addr, dev->irq);
581 580
582 if (el3_debug > 0) 581 if (el3_debug > 0)
583 printk(KERN_INFO "%s", version); 582 printk(KERN_INFO "%s", version);
id='n364' href='#n364'>364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752
/*
 * extcon-max14577.c - MAX14577 extcon driver to support MAX14577 MUIC
 *
 * Copyright (C) 2013 Samsung Electrnoics
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/mfd/max14577.h>
#include <linux/mfd/max14577-private.h>
#include <linux/extcon.h>

#define	DELAY_MS_DEFAULT		17000		/* unit: millisecond */

enum max14577_muic_adc_debounce_time {
	ADC_DEBOUNCE_TIME_5MS = 0,
	ADC_DEBOUNCE_TIME_10MS,
	ADC_DEBOUNCE_TIME_25MS,
	ADC_DEBOUNCE_TIME_38_62MS,
};

enum max14577_muic_status {
	MAX14577_MUIC_STATUS1 = 0,
	MAX14577_MUIC_STATUS2 = 1,
	MAX14577_MUIC_STATUS_END,
};

struct max14577_muic_info {
	struct device *dev;
	struct max14577 *max14577;
	struct extcon_dev *edev;
	int prev_cable_type;
	int prev_chg_type;
	u8 status[MAX14577_MUIC_STATUS_END];

	bool irq_adc;
	bool irq_chg;
	struct work_struct irq_work;
	struct mutex mutex;

	/*
	 * 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;

	/*
	 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
	 * h/w path of COMP2/COMN1 on CONTROL1 register.
	 */
	int path_usb;
	int path_uart;
};

enum max14577_muic_cable_group {
	MAX14577_CABLE_GROUP_ADC = 0,
	MAX14577_CABLE_GROUP_CHG,
};

/**
 * struct max14577_muic_irq
 * @irq: the index of irq list of MUIC device.
 * @name: the name of irq.
 * @virq: the virtual irq to use irq domain
 */
struct max14577_muic_irq {
	unsigned int irq;
	const char *name;
	unsigned int virq;
};

static struct max14577_muic_irq max14577_muic_irqs[] = {
	{ MAX14577_IRQ_INT1_ADC,	"muic-ADC" },
	{ MAX14577_IRQ_INT1_ADCLOW,	"muic-ADCLOW" },
	{ MAX14577_IRQ_INT1_ADCERR,	"muic-ADCError" },
	{ MAX14577_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
	{ MAX14577_IRQ_INT2_CHGDETRUN,	"muic-CHGDETRUN" },
	{ MAX14577_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
	{ MAX14577_IRQ_INT2_DBCHG,	"muic-DBCHG" },
	{ MAX14577_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
};

/* Define supported accessory type */
enum max14577_muic_acc_type {
	MAX14577_MUIC_ADC_GROUND = 0x0,
	MAX14577_MUIC_ADC_SEND_END_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S1_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S2_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S3_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S4_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S5_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S6_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S7_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S8_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S9_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S10_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S11_BUTTON,
	MAX14577_MUIC_ADC_REMOTE_S12_BUTTON,
	MAX14577_MUIC_ADC_RESERVED_ACC_1,
	MAX14577_MUIC_ADC_RESERVED_ACC_2,
	MAX14577_MUIC_ADC_RESERVED_ACC_3,
	MAX14577_MUIC_ADC_RESERVED_ACC_4,
	MAX14577_MUIC_ADC_RESERVED_ACC_5,
	MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2,
	MAX14577_MUIC_ADC_PHONE_POWERED_DEV,
	MAX14577_MUIC_ADC_TTY_CONVERTER,
	MAX14577_MUIC_ADC_UART_CABLE,
	MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG,
	MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF,
	MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON,
	MAX14577_MUIC_ADC_AV_CABLE_NOLOAD,
	MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG,
	MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF,
	MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON,
	MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */
	MAX14577_MUIC_ADC_OPEN,
};

/* max14577 MUIC device support below list of accessories(external connector) */
enum {
	EXTCON_CABLE_USB = 0,
	EXTCON_CABLE_TA,
	EXTCON_CABLE_FAST_CHARGER,
	EXTCON_CABLE_SLOW_CHARGER,
	EXTCON_CABLE_CHARGE_DOWNSTREAM,
	EXTCON_CABLE_JIG_USB_ON,
	EXTCON_CABLE_JIG_USB_OFF,
	EXTCON_CABLE_JIG_UART_OFF,
	EXTCON_CABLE_JIG_UART_ON,

	_EXTCON_CABLE_NUM,
};

static const char *max14577_extcon_cable[] = {
	[EXTCON_CABLE_USB]			= "USB",
	[EXTCON_CABLE_TA]			= "TA",
	[EXTCON_CABLE_FAST_CHARGER]		= "Fast-charger",
	[EXTCON_CABLE_SLOW_CHARGER]		= "Slow-charger",
	[EXTCON_CABLE_CHARGE_DOWNSTREAM]	= "Charge-downstream",
	[EXTCON_CABLE_JIG_USB_ON]		= "JIG-USB-ON",
	[EXTCON_CABLE_JIG_USB_OFF]		= "JIG-USB-OFF",
	[EXTCON_CABLE_JIG_UART_OFF]		= "JIG-UART-OFF",
	[EXTCON_CABLE_JIG_UART_ON]		= "JIG-UART-ON",

	NULL,
};

/*
 * max14577_muic_set_debounce_time - Set the debounce time of ADC
 * @info: the instance including private data of max14577 MUIC
 * @time: the debounce time of ADC
 */
static int max14577_muic_set_debounce_time(struct max14577_muic_info *info,
		enum max14577_muic_adc_debounce_time time)
{
	u8 ret;

	switch (time) {
	case ADC_DEBOUNCE_TIME_5MS:
	case ADC_DEBOUNCE_TIME_10MS:
	case ADC_DEBOUNCE_TIME_25MS:
	case ADC_DEBOUNCE_TIME_38_62MS:
		ret = max14577_update_reg(info->max14577->regmap,
					  MAX14577_MUIC_REG_CONTROL3,
					  CTRL3_ADCDBSET_MASK,
					  time << CTRL3_ADCDBSET_SHIFT);
		if (ret) {
			dev_err(info->dev, "failed to set ADC debounce time\n");
			return ret;
		}
		break;
	default:
		dev_err(info->dev, "invalid ADC debounce time\n");
		return -EINVAL;
	}

	return 0;
};

/*
 * max14577_muic_set_path - Set hardware line according to attached cable
 * @info: the instance including private data of max14577 MUIC
 * @value: the path according to attached cable
 * @attached: the state of cable (true:attached, false:detached)
 *
 * The max14577 MUIC device share outside H/W line among a varity of cables
 * so, this function set internal path of H/W line according to the type of
 * attached cable.
 */
static int max14577_muic_set_path(struct max14577_muic_info *info,
		u8 val, bool attached)
{
	int ret = 0;
	u8 ctrl1, ctrl2 = 0;

	/* Set open state to path before changing hw path */
	ret = max14577_update_reg(info->max14577->regmap,
				MAX14577_MUIC_REG_CONTROL1,
				CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN);
	if (ret < 0) {
		dev_err(info->dev, "failed to update MUIC register\n");
		return ret;
	}

	if (attached)
		ctrl1 = val;
	else
		ctrl1 = CTRL1_SW_OPEN;

	ret = max14577_update_reg(info->max14577->regmap,
				MAX14577_MUIC_REG_CONTROL1,
				CLEAR_IDBEN_MICEN_MASK, ctrl1);
	if (ret < 0) {
		dev_err(info->dev, "failed to update MUIC register\n");
		return ret;
	}

	if (attached)
		ctrl2 |= CTRL2_CPEN_MASK;	/* LowPwr=0, CPEn=1 */
	else
		ctrl2 |= CTRL2_LOWPWR_MASK;	/* LowPwr=1, CPEn=0 */

	ret = max14577_update_reg(info->max14577->regmap,
			MAX14577_REG_CONTROL2,
			CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2);
	if (ret < 0) {
		dev_err(info->dev, "failed to update MUIC register\n");
		return ret;
	}

	dev_dbg(info->dev,
		"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
		ctrl1, ctrl2, attached ? "attached" : "detached");

	return 0;
}

/*
 * max14577_muic_get_cable_type - Return cable type and check cable state
 * @info: the instance including private data of max14577 MUIC
 * @group: the path according to attached cable
 * @attached: store cable state and return
 *
 * This function check the cable state either attached or detached,
 * and then divide precise type of cable according to cable group.
 *	- max14577_CABLE_GROUP_ADC
 *	- max14577_CABLE_GROUP_CHG
 */
static int max14577_muic_get_cable_type(struct max14577_muic_info *info,
		enum max14577_muic_cable_group group, bool *attached)
{
	int cable_type = 0;
	int adc;
	int chg_type;

	switch (group) {
	case MAX14577_CABLE_GROUP_ADC:
		/*
		 * Read ADC value to check cable type and decide cable state
		 * according to cable type
		 */
		adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;
		adc >>= STATUS1_ADC_SHIFT;

		/*
		 * Check current cable state/cable type and store cable type
		 * (info->prev_cable_type) for handling cable when cable is
		 * detached.
		 */
		if (adc == MAX14577_MUIC_ADC_OPEN) {
			*attached = false;

			cable_type = info->prev_cable_type;
			info->prev_cable_type = MAX14577_MUIC_ADC_OPEN;
		} else {
			*attached = true;

			cable_type = info->prev_cable_type = adc;
		}
		break;
	case MAX14577_CABLE_GROUP_CHG:
		/*
		 * Read charger type to check cable type and decide cable state
		 * according to type of charger cable.
		 */
		chg_type = info->status[MAX14577_MUIC_STATUS2] &
			STATUS2_CHGTYP_MASK;
		chg_type >>= STATUS2_CHGTYP_SHIFT;

		if (chg_type == MAX14577_CHARGER_TYPE_NONE) {
			*attached = false;

			cable_type = info->prev_chg_type;
			info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE;
		} else {
			*attached = true;

			/*
			 * Check current cable state/cable type and store cable
			 * type(info->prev_chg_type) for handling cable when
			 * charger cable is detached.
			 */
			cable_type = info->prev_chg_type = chg_type;
		}

		break;
	default:
		dev_err(info->dev, "Unknown cable group (%d)\n", group);
		cable_type = -EINVAL;
		break;
	}

	return cable_type;
}

static int max14577_muic_jig_handler(struct max14577_muic_info *info,
		int cable_type, bool attached)
{
	char cable_name[32];
	int ret = 0;
	u8 path = CTRL1_SW_OPEN;

	dev_dbg(info->dev,
		"external connector is %s (adc:0x%02x)\n",
		attached ? "attached" : "detached", cable_type);

	switch (cable_type) {
	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:	/* ADC_JIG_USB_OFF */
		/* PATH:AP_USB */
		strcpy(cable_name, "JIG-USB-OFF");
		path = CTRL1_SW_USB;
		break;
	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:	/* ADC_JIG_USB_ON */
		/* PATH:AP_USB */
		strcpy(cable_name, "JIG-USB-ON");
		path = CTRL1_SW_USB;
		break;
	case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:	/* ADC_JIG_UART_OFF */
		/* PATH:AP_UART */
		strcpy(cable_name, "JIG-UART-OFF");
		path = CTRL1_SW_UART;
		break;
	default:
		dev_err(info->dev, "failed to detect %s jig cable\n",
			attached ? "attached" : "detached");
		return -EINVAL;
	}

	ret = max14577_muic_set_path(info, path, attached);
	if (ret < 0)
		return ret;

	extcon_set_cable_state(info->edev, cable_name, attached);

	return 0;
}

static int max14577_muic_adc_handler(struct max14577_muic_info *info)
{
	int cable_type;
	bool attached;
	int ret = 0;

	/* Check accessory state which is either detached or attached */
	cable_type = max14577_muic_get_cable_type(info,
				MAX14577_CABLE_GROUP_ADC, &attached);

	dev_dbg(info->dev,
		"external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
		attached ? "attached" : "detached", cable_type,
		info->prev_cable_type);

	switch (cable_type) {
	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:
	case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:
	case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:
		/* JIG */
		ret = max14577_muic_jig_handler(info, cable_type, attached);
		if (ret < 0)
			return ret;
		break;
	case MAX14577_MUIC_ADC_GROUND:
	case MAX14577_MUIC_ADC_SEND_END_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON:
	case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON:
	case MAX14577_MUIC_ADC_RESERVED_ACC_1:
	case MAX14577_MUIC_ADC_RESERVED_ACC_2:
	case MAX14577_MUIC_ADC_RESERVED_ACC_3:
	case MAX14577_MUIC_ADC_RESERVED_ACC_4:
	case MAX14577_MUIC_ADC_RESERVED_ACC_5:
	case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2:
	case MAX14577_MUIC_ADC_PHONE_POWERED_DEV:
	case MAX14577_MUIC_ADC_TTY_CONVERTER:
	case MAX14577_MUIC_ADC_UART_CABLE:
	case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG:
	case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD:
	case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG:
	case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON:
	case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1:
		/*
		 * This accessory isn't used in general case if it is specially
		 * needed to detect additional accessory, should implement
		 * proper operation when this accessory is attached/detached.
		 */
		dev_info(info->dev,
			"accessory is %s but it isn't used (adc:0x%x)\n",
			attached ? "attached" : "detached", cable_type);
		return -EAGAIN;
	default:
		dev_err(info->dev,
			"failed to detect %s accessory (adc:0x%x)\n",
			attached ? "attached" : "detached", cable_type);
		return -EINVAL;
	}

	return 0;
}

static int max14577_muic_chg_handler(struct max14577_muic_info *info)
{
	int chg_type;
	bool attached;
	int ret = 0;

	chg_type = max14577_muic_get_cable_type(info,
				MAX14577_CABLE_GROUP_CHG, &attached);

	dev_dbg(info->dev,
		"external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
			attached ? "attached" : "detached",
			chg_type, info->prev_chg_type);

	switch (chg_type) {
	case MAX14577_CHARGER_TYPE_USB:
		/* PATH:AP_USB */
		ret = max14577_muic_set_path(info, info->path_usb, attached);
		if (ret < 0)
			return ret;

		extcon_set_cable_state(info->edev, "USB", attached);
		break;
	case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
		extcon_set_cable_state(info->edev, "TA", attached);
		break;
	case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
		extcon_set_cable_state(info->edev,
				"Charge-downstream", attached);
		break;
	case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
		extcon_set_cable_state(info->edev, "Slow-charger", attached);
		break;
	case MAX14577_CHARGER_TYPE_SPECIAL_1A:
		extcon_set_cable_state(info->edev, "Fast-charger", attached);
		break;
	case MAX14577_CHARGER_TYPE_NONE:
	case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
		break;
	default:
		dev_err(info->dev,
			"failed to detect %s accessory (chg_type:0x%x)\n",
			attached ? "attached" : "detached", chg_type);
		return -EINVAL;
	}

	return 0;
}

static void max14577_muic_irq_work(struct work_struct *work)
{
	struct max14577_muic_info *info = container_of(work,
			struct max14577_muic_info, irq_work);
	int ret = 0;

	if (!info->edev)
		return;

	mutex_lock(&info->mutex);

	ret = max14577_bulk_read(info->max14577->regmap,
			MAX14577_MUIC_REG_STATUS1, info->status, 2);
	if (ret) {
		dev_err(info->dev, "failed to read MUIC register\n");
		mutex_unlock(&info->mutex);
		return;
	}

	if (info->irq_adc) {
		ret = max14577_muic_adc_handler(info);
		info->irq_adc = false;
	}
	if (info->irq_chg) {
		ret = max14577_muic_chg_handler(info);
		info->irq_chg = false;
	}

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

	mutex_unlock(&info->mutex);

	return;
}

static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
{
	struct max14577_muic_info *info = data;
	int i, irq_type = -1;

	/*
	 * We may be called multiple times for different nested IRQ-s.
	 * Including changes in INT1_ADC and INT2_CGHTYP at once.
	 * However we only need to know whether it was ADC, charger
	 * or both interrupts so decode IRQ and turn on proper flags.
	 */
	for (i = 0; i < ARRAY_SIZE(max14577_muic_irqs); i++)
		if (irq == max14577_muic_irqs[i].virq)
			irq_type = max14577_muic_irqs[i].irq;

	switch (irq_type) {
	case MAX14577_IRQ_INT1_ADC:
	case MAX14577_IRQ_INT1_ADCLOW:
	case MAX14577_IRQ_INT1_ADCERR:
		/* Handle all of accessory except for
		   type of charger accessory */
		info->irq_adc = true;
		break;
	case MAX14577_IRQ_INT2_CHGTYP:
	case MAX14577_IRQ_INT2_CHGDETRUN:
	case MAX14577_IRQ_INT2_DCDTMR:
	case MAX14577_IRQ_INT2_DBCHG:
	case MAX14577_IRQ_INT2_VBVOLT:
		/* Handle charger accessory */
		info->irq_chg = true;
		break;
	default:
		dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
				irq_type);
		return IRQ_HANDLED;
	}
	schedule_work(&info->irq_work);

	return IRQ_HANDLED;
}

static int max14577_muic_detect_accessory(struct max14577_muic_info *info)
{
	int ret = 0;
	int adc;
	int chg_type;
	bool attached;

	mutex_lock(&info->mutex);

	/* Read STATUSx register to detect accessory */
	ret = max14577_bulk_read(info->max14577->regmap,
			MAX14577_MUIC_REG_STATUS1, info->status, 2);
	if (ret) {
		dev_err(info->dev, "failed to read MUIC register\n");
		mutex_unlock(&info->mutex);
		return ret;
	}

	adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
					&attached);
	if (attached && adc != MAX14577_MUIC_ADC_OPEN) {
		ret = max14577_muic_adc_handler(info);
		if (ret < 0) {
			dev_err(info->dev, "Cannot detect accessory\n");
			mutex_unlock(&info->mutex);
			return ret;
		}
	}

	chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG,
					&attached);
	if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) {
		ret = max14577_muic_chg_handler(info);
		if (ret < 0) {
			dev_err(info->dev, "Cannot detect charger accessory\n");
			mutex_unlock(&info->mutex);
			return ret;
		}
	}

	mutex_unlock(&info->mutex);

	return 0;
}

static void max14577_muic_detect_cable_wq(struct work_struct *work)
{
	struct max14577_muic_info *info = container_of(to_delayed_work(work),
				struct max14577_muic_info, wq_detcable);

	max14577_muic_detect_accessory(info);
}

static int max14577_muic_probe(struct platform_device *pdev)
{
	struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
	struct max14577_muic_info *info;
	int delay_jiffies;
	int ret;
	int i;
	u8 id;

	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	if (!info) {
		dev_err(&pdev->dev, "failed to allocate memory\n");
		return -ENOMEM;
	}
	info->dev = &pdev->dev;
	info->max14577 = max14577;

	platform_set_drvdata(pdev, info);
	mutex_init(&info->mutex);

	INIT_WORK(&info->irq_work, max14577_muic_irq_work);

	/* Support irq domain for max14577 MUIC device */
	for (i = 0; i < ARRAY_SIZE(max14577_muic_irqs); i++) {
		struct max14577_muic_irq *muic_irq = &max14577_muic_irqs[i];
		unsigned int virq = 0;

		virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
		if (!virq)
			return -EINVAL;
		muic_irq->virq = virq;

		ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
				max14577_muic_irq_handler,
				IRQF_NO_SUSPEND,
				muic_irq->name, info);
		if (ret) {
			dev_err(&pdev->dev,
				"failed: irq request (IRQ: %d,"
				" error :%d)\n",
				muic_irq->irq, ret);
			return ret;
		}
	}

	/* Initialize extcon device */
	info->edev = devm_kzalloc(&pdev->dev, sizeof(*info->edev), GFP_KERNEL);
	if (!info->edev) {
		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
		return -ENOMEM;
	}

	info->edev->name = dev_name(&pdev->dev);
	info->edev->supported_cable = max14577_extcon_cable;
	ret = extcon_dev_register(info->edev);
	if (ret) {
		dev_err(&pdev->dev, "failed to register extcon device\n");
		return ret;
	}

	/* Default h/w line path */
	info->path_usb = CTRL1_SW_USB;
	info->path_uart = CTRL1_SW_UART;
	delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);

	/* Set initial path for UART */
	max14577_muic_set_path(info, info->path_uart, true);

	/* Check revision number of MUIC device*/
	ret = max14577_read_reg(info->max14577->regmap,
			MAX14577_REG_DEVICEID, &id);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to read revision number\n");
		goto err_extcon;
	}
	dev_info(info->dev, "device ID : 0x%x\n", id);

	/* Set ADC debounce time */
	max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);

	/*
	 * 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, max14577_muic_detect_cable_wq);
	ret = queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
			delay_jiffies);
	if (ret < 0) {
		dev_err(&pdev->dev,
			"failed to schedule delayed work for cable detect\n");
		goto err_extcon;
	}

	return ret;

err_extcon:
	extcon_dev_unregister(info->edev);
	return ret;
}

static int max14577_muic_remove(struct platform_device *pdev)
{
	struct max14577_muic_info *info = platform_get_drvdata(pdev);

	cancel_work_sync(&info->irq_work);
	extcon_dev_unregister(info->edev);

	return 0;
}

static struct platform_driver max14577_muic_driver = {
	.driver		= {
		.name	= "max14577-muic",
		.owner	= THIS_MODULE,
	},
	.probe		= max14577_muic_probe,
	.remove		= max14577_muic_remove,
};

module_platform_driver(max14577_muic_driver);

MODULE_DESCRIPTION("MAXIM 14577 Extcon driver");
MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:extcon-max14577");