Date:	Wed, 09 May 2012 10:27:19 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	Greg KH <gregkh@...uxfoundation.org>, Arnd Bergmann <arnd@...db.de>
Cc:	"myungjoo.ham@...sung.com" <myungjoo.ham@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 2/2] misc: MAX8997: Remove max8997-muic driver

This patch remove old max8997-muic drvier because of newly Extcon framework.
Extcon framework manages the external connector, so add extcon-max8997
driver
by using Extcon interface to support MUIC feature of Maxim 8997 PMIC instead
of max8997-muic driver(drivers/misc/max8997-muic.c).

Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 drivers/misc/Kconfig        |    8 -
 drivers/misc/Makefile       |    1 -
 drivers/misc/max8997-muic.c |  495
-------------------------------------------
 include/linux/mfd/max8997.h |   23 --
 4 files changed, 0 insertions(+), 527 deletions(-)
 delete mode 100644 drivers/misc/max8997-muic.c

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index c779509..5e86d88 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -490,14 +490,6 @@ config USB_SWITCH_FSA9480
 	  stereo and mono audio, video, microphone and UART data to use
 	  a common connector port.

-config MAX8997_MUIC
-	tristate "MAX8997 MUIC Support"
-	depends on MFD_MAX8997
-	help
-	  If you say yes here you get support for the MUIC device of
-	  Maxim MAX8997 PMIC.
-	  The MAX8997 MUIC is a USB port accessory detector and switch.
-
 source "drivers/misc/c2port/Kconfig"
 source "drivers/misc/eeprom/Kconfig"
 source "drivers/misc/cb710/Kconfig"
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 3e1d801..b26495a 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -48,4 +48,3 @@ obj-y				+= lis3lv02d/
 obj-y				+= carma/
 obj-$(CONFIG_USB_SWITCH_FSA9480) += fsa9480.o
 obj-$(CONFIG_ALTERA_STAPL)	+=altera-stapl/
-obj-$(CONFIG_MAX8997_MUIC)	+= max8997-muic.o
diff --git a/drivers/misc/max8997-muic.c b/drivers/misc/max8997-muic.c
deleted file mode 100644
index 19591ea..0000000
--- a/drivers/misc/max8997-muic.c
+++ /dev/null
@@ -1,495 +0,0 @@
-/*
- * max8997-muic.c - MAX8997 muic driver for the Maxim 8997
- *
- *  Copyright (C) 2011 Samsung Electrnoics
- *  Donggeun Kim <dg77.kim@...sung.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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 USA
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/kobject.h>
-#include <linux/mfd/max8997.h>
-#include <linux/mfd/max8997-private.h>
-
-/* MAX8997-MUIC STATUS1 register */
-#define STATUS1_ADC_SHIFT		0
-#define STATUS1_ADCLOW_SHIFT		5
-#define STATUS1_ADCERR_SHIFT		6
-#define STATUS1_ADC_MASK		(0x1f << STATUS1_ADC_SHIFT)
-#define STATUS1_ADCLOW_MASK		(0x1 << STATUS1_ADCLOW_SHIFT)
-#define STATUS1_ADCERR_MASK		(0x1 << STATUS1_ADCERR_SHIFT)
-
-/* MAX8997-MUIC STATUS2 register */
-#define STATUS2_CHGTYP_SHIFT		0
-#define STATUS2_CHGDETRUN_SHIFT		3
-#define STATUS2_DCDTMR_SHIFT		4
-#define STATUS2_DBCHG_SHIFT		5
-#define STATUS2_VBVOLT_SHIFT		6
-#define STATUS2_CHGTYP_MASK		(0x7 << STATUS2_CHGTYP_SHIFT)
-#define STATUS2_CHGDETRUN_MASK		(0x1 << STATUS2_CHGDETRUN_SHIFT)
-#define STATUS2_DCDTMR_MASK		(0x1 << STATUS2_DCDTMR_SHIFT)
-#define STATUS2_DBCHG_MASK		(0x1 << STATUS2_DBCHG_SHIFT)
-#define STATUS2_VBVOLT_MASK		(0x1 << STATUS2_VBVOLT_SHIFT)
-
-/* MAX8997-MUIC STATUS3 register */
-#define STATUS3_OVP_SHIFT		2
-#define STATUS3_OVP_MASK		(0x1 << STATUS3_OVP_SHIFT)
-
-/* MAX8997-MUIC CONTROL1 register */
-#define COMN1SW_SHIFT			0
-#define COMP2SW_SHIFT			3
-#define COMN1SW_MASK			(0x7 << COMN1SW_SHIFT)
-#define COMP2SW_MASK			(0x7 << COMP2SW_SHIFT)
-#define SW_MASK				(COMP2SW_MASK | COMN1SW_MASK)
-
-#define MAX8997_SW_USB		((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
-#define MAX8997_SW_AUDIO	((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
-#define MAX8997_SW_UART		((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
-#define MAX8997_SW_OPEN		((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))
-
-#define	MAX8997_ADC_GROUND		0x00
-#define	MAX8997_ADC_MHL			0x01
-#define	MAX8997_ADC_JIG_USB_1		0x18
-#define	MAX8997_ADC_JIG_USB_2		0x19
-#define	MAX8997_ADC_DESKDOCK		0x1a
-#define	MAX8997_ADC_JIG_UART		0x1c
-#define	MAX8997_ADC_CARDOCK		0x1d
-#define	MAX8997_ADC_OPEN		0x1f
-
-struct max8997_muic_irq {
-	unsigned int irq;
-	const char *name;
-};
-
-static struct max8997_muic_irq muic_irqs[] = {
-	{ MAX8997_MUICIRQ_ADCError, "muic-ADC_error" },
-	{ MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" },
-	{ MAX8997_MUICIRQ_ADC, "muic-ADC" },
-	{ MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" },
-	{ MAX8997_MUICIRQ_DBChg, "muic-DB_charger" },
-	{ MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" },
-	{ MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" },
-	{ MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" },
-	{ MAX8997_MUICIRQ_OVP, "muic-over_voltage" },
-};
-
-struct max8997_muic_info {
-	struct device *dev;
-	struct max8997_dev *iodev;
-	struct i2c_client *muic;
-	struct max8997_muic_platform_data *muic_pdata;
-
-	int irq;
-	struct work_struct irq_work;
-
-	enum max8997_muic_charger_type pre_charger_type;
-	int pre_adc;
-
-	struct mutex mutex;
-};
-
-static int max8997_muic_handle_usb(struct max8997_muic_info *info,
-			enum max8997_muic_usb_type usb_type, bool attached)
-{
-	struct max8997_muic_platform_data *mdata = info->muic_pdata;
-	int ret = 0;
-
-	if (usb_type == MAX8997_USB_HOST) {
-		/* switch to USB */
-		ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
-				attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
-				SW_MASK);
-		if (ret) {
-			dev_err(info->dev, "failed to update muic register\n");
-			goto out;
-		}
-	}
-
-	if (mdata->usb_callback)
-		mdata->usb_callback(usb_type, attached);
-out:
-	return ret;
-}
-
-static void max8997_muic_handle_mhl(struct max8997_muic_info *info,
-			bool attached)
-{
-	struct max8997_muic_platform_data *mdata = info->muic_pdata;
-
-	if (mdata->mhl_callback)
-		mdata->mhl_callback(attached);
-}
-
-static int max8997_muic_handle_dock(struct max8997_muic_info *info,
-			int adc, bool attached)
-{
-	struct max8997_muic_platform_data *mdata = info->muic_pdata;
-	int ret = 0;
-
-	/* switch to AUDIO */
-	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
-				attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
-				SW_MASK);
-	if (ret) {
-		dev_err(info->dev, "failed to update muic register\n");
-		goto out;
-	}
-
-	switch (adc) {
-	case MAX8997_ADC_DESKDOCK:
-		if (mdata->deskdock_callback)
-			mdata->deskdock_callback(attached);
-		break;
-	case MAX8997_ADC_CARDOCK:
-		if (mdata->cardock_callback)
-			mdata->cardock_callback(attached);
-		break;
-	default:
-		break;
-	}
-out:
-	return ret;
-}
-
-static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
-			bool attached)
-{
-	struct max8997_muic_platform_data *mdata = info->muic_pdata;
-	int ret = 0;
-
-	/* switch to UART */
-	ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
-				attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
-				SW_MASK);
-	if (ret) {
-		dev_err(info->dev, "failed to update muic register\n");
-		goto out;
-	}
-
-	if (mdata->uart_callback)
-		mdata->uart_callback(attached);
-out:
-	return ret;
-}
-
-static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
-{
-	int ret = 0;
-
-	switch (info->pre_adc) {
-	case MAX8997_ADC_GROUND:
-		ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
-		break;
-	case MAX8997_ADC_MHL:
-		max8997_muic_handle_mhl(info, false);
-		break;
-	case MAX8997_ADC_JIG_USB_1:
-	case MAX8997_ADC_JIG_USB_2:
-		ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
-		break;
-	case MAX8997_ADC_DESKDOCK:
-	case MAX8997_ADC_CARDOCK:
-		ret = max8997_muic_handle_dock(info, info->pre_adc, false);
-		break;
-	case MAX8997_ADC_JIG_UART:
-		ret = max8997_muic_handle_jig_uart(info, false);
-		break;
-	default:
-		break;
-	}
-
-	return ret;
-}
-
-static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc)
-{
-	int ret = 0;
-
-	switch (adc) {
-	case MAX8997_ADC_GROUND:
-		ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true);
-		break;
-	case MAX8997_ADC_MHL:
-		max8997_muic_handle_mhl(info, true);
-		break;
-	case MAX8997_ADC_JIG_USB_1:
-	case MAX8997_ADC_JIG_USB_2:
-		ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true);
-		break;
-	case MAX8997_ADC_DESKDOCK:
-	case MAX8997_ADC_CARDOCK:
-		ret = max8997_muic_handle_dock(info, adc, true);
-		break;
-	case MAX8997_ADC_JIG_UART:
-		ret = max8997_muic_handle_jig_uart(info, true);
-		break;
-	case MAX8997_ADC_OPEN:
-		ret = max8997_muic_handle_adc_detach(info);
-		break;
-	default:
-		break;
-	}
-
-	info->pre_adc = adc;
-
-	return ret;
-}
-
-static int max8997_muic_handle_charger_type(struct max8997_muic_info *info,
-				enum max8997_muic_charger_type charger_type)
-{
-	struct max8997_muic_platform_data *mdata = info->muic_pdata;
-	u8 adc;
-	int ret;
-
-	ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc);
-	if (ret) {
-		dev_err(info->dev, "failed to read muic register\n");
-		goto out;
-	}
-
-	switch (charger_type) {
-	case MAX8997_CHARGER_TYPE_NONE:
-		if (mdata->charger_callback)
-			mdata->charger_callback(false, charger_type);
-		if (info->pre_charger_type == MAX8997_CHARGER_TYPE_USB) {
-			max8997_muic_handle_usb(info,
-					MAX8997_USB_DEVICE, false);
-		}
-		break;
-	case MAX8997_CHARGER_TYPE_USB:
-		if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) {
-			max8997_muic_handle_usb(info,
-					MAX8997_USB_DEVICE, true);
-		}
-		if (mdata->charger_callback)
-			mdata->charger_callback(true, charger_type);
-		break;
-	case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
-	case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
-	case MAX8997_CHARGER_TYPE_500MA:
-	case MAX8997_CHARGER_TYPE_1A:
-		if (mdata->charger_callback)
-			mdata->charger_callback(true, charger_type);
-		break;
-	default:
-		break;
-	}
-
-	info->pre_charger_type = charger_type;
-out:
-	return ret;
-}
-
-static void max8997_muic_irq_work(struct work_struct *work)
-{
-	struct max8997_muic_info *info = container_of(work,
-			struct max8997_muic_info, irq_work);
-	struct max8997_platform_data *pdata =
-				dev_get_platdata(info->iodev->dev);
-	u8 status[3];
-	u8 adc, chg_type;
-
-	int irq_type = info->irq - pdata->irq_base;
-	int ret;
-
-	mutex_lock(&info->mutex);
-
-	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
-				3, status);
-	if (ret) {
-		dev_err(info->dev, "failed to read muic register\n");
-		mutex_unlock(&info->mutex);
-		return;
-	}
-
-	dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
-			status[0], status[1]);
-
-	switch (irq_type) {
-	case MAX8997_MUICIRQ_ADC:
-		adc = status[0] & STATUS1_ADC_MASK;
-		adc >>= STATUS1_ADC_SHIFT;
-
-		max8997_muic_handle_adc(info, adc);
-		break;
-	case MAX8997_MUICIRQ_ChgTyp:
-		chg_type = status[1] & STATUS2_CHGTYP_MASK;
-		chg_type >>= STATUS2_CHGTYP_SHIFT;
-
-		max8997_muic_handle_charger_type(info, chg_type);
-		break;
-	default:
-		dev_info(info->dev, "misc interrupt: %s occurred\n",
-			 muic_irqs[irq_type].name);
-		break;
-	}
-
-	mutex_unlock(&info->mutex);
-
-	return;
-}
-
-static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
-{
-	struct max8997_muic_info *info = data;
-
-	dev_dbg(info->dev, "irq:%d\n", irq);
-	info->irq = irq;
-
-	schedule_work(&info->irq_work);
-
-	return IRQ_HANDLED;
-}
-
-static void max8997_muic_detect_dev(struct max8997_muic_info *info)
-{
-	int ret;
-	u8 status[2], adc, chg_type;
-
-	ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
-				2, status);
-	if (ret) {
-		dev_err(info->dev, "failed to read muic register\n");
-		return;
-	}
-
-	dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n",
-			status[0], status[1]);
-
-	adc = status[0] & STATUS1_ADC_MASK;
-	adc >>= STATUS1_ADC_SHIFT;
-
-	chg_type = status[1] & STATUS2_CHGTYP_MASK;
-	chg_type >>= STATUS2_CHGTYP_SHIFT;
-
-	max8997_muic_handle_adc(info, adc);
-	max8997_muic_handle_charger_type(info, chg_type);
-}
-
-static void max8997_initialize_device(struct max8997_muic_info *info)
-{
-	struct max8997_muic_platform_data *mdata = info->muic_pdata;
-	int i;
-
-	for (i = 0; i < mdata->num_init_data; i++) {
-		max8997_write_reg(info->muic, mdata->init_data[i].addr,
-				mdata->init_data[i].data);
-	}
-}
-
-static int __devinit max8997_muic_probe(struct platform_device *pdev)
-{
-	struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
-	struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);
-	struct max8997_muic_info *info;
-	int ret, i;
-
-	info = kzalloc(sizeof(struct max8997_muic_info), GFP_KERNEL);
-	if (!info) {
-		dev_err(&pdev->dev, "failed to allocate memory\n");
-		ret = -ENOMEM;
-		goto err_kfree;
-	}
-
-	if (!pdata->muic_pdata) {
-		dev_err(&pdev->dev, "failed to get platform_data\n");
-		ret = -EINVAL;
-		goto err_pdata;
-	}
-	info->muic_pdata = pdata->muic_pdata;
-
-	info->dev = &pdev->dev;
-	info->iodev = iodev;
-	info->muic = iodev->muic;
-
-	platform_set_drvdata(pdev, info);
-	mutex_init(&info->mutex);
-
-	INIT_WORK(&info->irq_work, max8997_muic_irq_work);
-
-	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
-		struct max8997_muic_irq *muic_irq = &muic_irqs[i];
-
-		ret = request_threaded_irq(pdata->irq_base + muic_irq->irq,
-				NULL, max8997_muic_irq_handler,
-				0, muic_irq->name,
-				info);
-		if (ret) {
-			dev_err(&pdev->dev,
-				"failed: irq request (IRQ: %d,"
-				" error :%d)\n",
-				muic_irq->irq, ret);
-
-			for (i = i - 1; i >= 0; i--)
-				free_irq(muic_irq->irq, info);
-
-			goto err_irq;
-		}
-	}
-
-	/* Initialize registers according to platform data */
-	max8997_initialize_device(info);
-
-	/* Initial device detection */
-	max8997_muic_detect_dev(info);
-
-	return ret;
-
-err_irq:
-err_pdata:
-	kfree(info);
-err_kfree:
-	return ret;
-}
-
-static int __devexit max8997_muic_remove(struct platform_device *pdev)
-{
-	struct max8997_muic_info *info = platform_get_drvdata(pdev);
-	struct max8997_platform_data *pdata =
-				dev_get_platdata(info->iodev->dev);
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
-		free_irq(pdata->irq_base + muic_irqs[i].irq, info);
-	cancel_work_sync(&info->irq_work);
-
-	kfree(info);
-
-	return 0;
-}
-
-static struct platform_driver max8997_muic_driver = {
-	.driver		= {
-		.name	= "max8997-muic",
-		.owner	= THIS_MODULE,
-	},
-	.probe		= max8997_muic_probe,
-	.remove		= __devexit_p(max8997_muic_remove),
-};
-
-module_platform_driver(max8997_muic_driver);
-
-MODULE_DESCRIPTION("Maxim MAX8997 MUIC driver");
-MODULE_AUTHOR("Donggeun Kim <dg77.kim@...sung.com>");
-MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max8997.h b/include/linux/mfd/max8997.h
index 28726dd..b40c08c 100644
--- a/include/linux/mfd/max8997.h
+++ b/include/linux/mfd/max8997.h
@@ -99,34 +99,11 @@ struct max8997_muic_reg_data {

 /**
  * struct max8997_muic_platform_data
- * @usb_callback: callback function for USB
- *		  inform callee of USB type (HOST or DEVICE)
- *		  and attached state(true or false)
- * @charger_callback: callback function for charger
- *		  inform callee of charger_type
- *		  and attached state(true or false)
- * @deskdock_callback: callback function for desk dock
- *		  inform callee of attached state(true or false)
- * @cardock_callback: callback function for car dock
- *		  inform callee of attached state(true or false)
- * @mhl_callback: callback function for MHL (Mobile High-definition Link)
- *		  inform callee of attached state(true or false)
- * @uart_callback: callback function for JIG UART
- *		   inform callee of attached state(true or false)
  * @init_data: array of max8997_muic_reg_data
  *	       used for initializing registers of MAX8997 MUIC device
  * @num_init_data: array size of init_data
  */
 struct max8997_muic_platform_data {
-	void (*usb_callback)(enum max8997_muic_usb_type usb_type,
-		bool attached);
-	void (*charger_callback)(bool attached,
-		enum max8997_muic_charger_type charger_type);
-	void (*deskdock_callback) (bool attached);
-	void (*cardock_callback) (bool attached);
-	void (*mhl_callback) (bool attached);
-	void (*uart_callback) (bool attached);
-
 	struct max8997_muic_reg_data *init_data;
 	int num_init_data;
 };
-- 
1.7.0.4

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