Revert "Extcon: adc_jack: adc-jack driver to support 3.5 pi or simliar devices"

This reverts commit 980d7929 as it
breaks the build with the error:
	ERROR: "extcon_cable_name" [drivers/extcon/extcon-adc-jack.ko] undefined!

Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: anish kumar <anish.singh@samsung.com>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/extcon/Kconfig

@@ -21,12 +21,6 @@ config EXTCON_GPIO
 	  Say Y here to enable GPIO based extcon support. Note that GPIO
 	  extcon supports single state per extcon instance.
 
-config EXTCON_ADC_JACK
-	tristate "ADC Jack extcon support"
-	depends on IIO
-	help
-	  Say Y here to enable extcon device driver based on ADC values.
-
 config EXTCON_MAX77693
 	tristate "MAX77693 EXTCON Support"
 	depends on MFD_MAX77693

drivers/extcon/Makefile

@@ -4,7 +4,6 @@
 
 obj-$(CONFIG_EXTCON)		+= extcon_class.o
 obj-$(CONFIG_EXTCON_GPIO)	+= extcon_gpio.o
-obj-$(CONFIG_EXTCON_ADC_JACK)	+= extcon-adc-jack.o
 obj-$(CONFIG_EXTCON_MAX77693)	+= extcon-max77693.o
 obj-$(CONFIG_EXTCON_MAX8997)	+= extcon-max8997.o
 obj-$(CONFIG_EXTCON_ARIZONA)	+= extcon-arizona.o

drivers/extcon/extcon-adc-jack.c

-/*
- * drivers/extcon/extcon-adc-jack.c
- *
- * Analog Jack extcon driver with ADC-based detection capability.
- *
- * Copyright (C) 2012 Samsung Electronics
- * MyungJoo Ham <myungjoo.ham@samsung.com>
- *
- * Modified for calling to IIO to get adc by <anish.singh@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/err.h>
-#include <linux/interrupt.h>
-#include <linux/workqueue.h>
-#include <linux/iio/consumer.h>
-#include <linux/extcon/extcon-adc-jack.h>
-#include <linux/extcon.h>
-
-/**
- * struct adc_jack_data - internal data for adc_jack device driver
- * @edev        - extcon device.
- * @cable_names - list of supported cables.
- * @num_cables  - size of cable_names.
- * @adc_conditions       - list of adc value conditions.
- * @num_conditions       - size of adc_conditions.
- * @irq         - irq number of attach/detach event (0 if not exist).
- * @handling_delay      - interrupt handler will schedule extcon event
- *                      handling at handling_delay jiffies.
- * @handler     - extcon event handler called by interrupt handler.
- * @chan	- iio channel being queried.
- */
-struct adc_jack_data {
-	struct extcon_dev edev;
-
-	const char **cable_names;
-	int num_cables;
-	struct adc_jack_cond *adc_conditions;
-	int num_conditions;
-
-	int irq;
-	unsigned long handling_delay; /* in jiffies */
-	struct delayed_work handler;
-
-	struct iio_channel *chan;
-};
-
-static void adc_jack_handler(struct work_struct *work)
-{
-	struct adc_jack_data *data = container_of(to_delayed_work(work),
-						  struct adc_jack_data,
-						  handler);
-	u32 state = 0;
-	int ret, adc_val;
-	int i;
-
-	ret = iio_read_channel_raw(data->chan, &adc_val);
-	if (ret < 0) {
-		dev_err(data->edev.dev, "read channel() error: %d\n", ret);
-		return;
-	}
-
-	/* Get state from adc value with adc_conditions */
-	for (i = 0; i < data->num_conditions; i++) {
-		struct adc_jack_cond *def = &data->adc_conditions[i];
-		if (!def->state)
-			break;
-		if (def->min_adc <= adc_val && def->max_adc >= adc_val) {
-			state = def->state;
-			break;
-		}
-	}
-	/* if no def has met, it means state = 0 (no cables attached) */
-
-	extcon_set_state(&data->edev, state);
-}
-
-static irqreturn_t adc_jack_irq_thread(int irq, void *_data)
-{
-	struct adc_jack_data *data = _data;
-
-	schedule_delayed_work(&data->handler, data->handling_delay);
-	return IRQ_HANDLED;
-}
-
-static int __devinit adc_jack_probe(struct platform_device *pdev)
-{
-	struct adc_jack_data *data;
-	struct adc_jack_pdata *pdata = pdev->dev.platform_data;
-	int i, err = 0;
-
-	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	data->edev.name = pdata->name;
-
-	if (pdata->cable_names)
-		data->edev.supported_cable = pdata->cable_names;
-	else
-		data->edev.supported_cable = extcon_cable_name;
-
-	/* Check the length of array and set num_cables */
-	for (i = 0; data->edev.supported_cable[i]; i++)
-		;
-	if (i == 0 || i > SUPPORTED_CABLE_MAX) {
-		err = -EINVAL;
-		dev_err(&pdev->dev, "error: pdata->cable_names size = %d\n",
-			i - 1);
-		goto out;
-	}
-	data->num_cables = i;
-
-	if (!pdata->adc_conditions ||
-	    !pdata->adc_conditions[0].state) {
-		err = -EINVAL;
-		dev_err(&pdev->dev, "error: adc_conditions not defined.\n");
-		goto out;
-	}
-	data->adc_conditions = pdata->adc_conditions;
-
-	/* Check the length of array and set num_conditions */
-	for (i = 0; data->adc_conditions[i].state; i++)
-		;
-	data->num_conditions = i;
-
-	data->chan = iio_channel_get(dev_name(&pdev->dev),
-						pdata->consumer_channel);
-	if (IS_ERR(data->chan)) {
-		err = PTR_ERR(data->chan);
-		goto out;
-	}
-
-	data->handling_delay = msecs_to_jiffies(pdata->handling_delay_ms);
-
-	INIT_DELAYED_WORK_DEFERRABLE(&data->handler, adc_jack_handler);
-
-	platform_set_drvdata(pdev, data);
-
-	err = extcon_dev_register(&data->edev, &pdev->dev);
-	if (err)
-		goto out;
-
-	data->irq = platform_get_irq(pdev, 0);
-	if (!data->irq) {
-		dev_err(&pdev->dev, "platform_get_irq failed\n");
-		err = -ENODEV;
-		goto err_irq;
-	}
-
-	err = request_any_context_irq(data->irq, adc_jack_irq_thread,
-				pdata->irq_flags, pdata->name, data);
-
-	if (err) {
-		dev_err(&pdev->dev, "error: irq %d\n", data->irq);
-		err = -EINVAL;
-		goto err_irq;
-	}
-
-	goto out;
-
-err_irq:
-	extcon_dev_unregister(&data->edev);
-out:
-	return err;
-}
-
-static int __devexit adc_jack_remove(struct platform_device *pdev)
-{
-	struct adc_jack_data *data = platform_get_drvdata(pdev);
-
-	free_irq(data->irq, data);
-	cancel_work_sync(&data->handler.work);
-	extcon_dev_unregister(&data->edev);
-
-	return 0;
-}
-
-static struct platform_driver adc_jack_driver = {
-	.probe		= adc_jack_probe,
-	.remove		= __devexit_p(adc_jack_remove),
-	.driver		= {
-		.name	= "adc-jack",
-		.owner	= THIS_MODULE,
-	},
-};
-
-module_platform_driver(adc_jack_driver);

include/linux/extcon/extcon-adc-jack.h

-/*
- * include/linux/extcon/extcon-adc-jack.h
- *
- * Analog Jack extcon driver with ADC-based detection capability.
- *
- * Copyright (C) 2012 Samsung Electronics
- * MyungJoo Ham <myungjoo.ham@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#ifndef _EXTCON_ADC_JACK_H_
-#define _EXTCON_ADC_JACK_H_ __FILE__
-
-#include <linux/module.h>
-#include <linux/extcon.h>
-
-/**
- * struct adc_jack_cond - condition to use an extcon state
- * @state	- the corresponding extcon state (if 0, this struct denotes
- *		the last adc_jack_cond element among the array)
- * @min_adc	- min adc value for this condition
- * @max_adc	- max adc value for this condition
- *
- * For example, if { .state = 0x3, .min_adc = 100, .max_adc = 200}, it means
- * that if ADC value is between (inclusive) 100 and 200, than the cable 0 and
- * 1 are attached (1<<0 | 1<<1 == 0x3)
- *
- * Note that you don't need to describe condition for "no cable attached"
- * because when no adc_jack_cond is met, state = 0 is automatically chosen.
- */
-struct adc_jack_cond {
-	u32 state; /* extcon state value. 0 if invalid */
-	u32 min_adc;
-	u32 max_adc;
-};
-
-/**
- * struct adc_jack_pdata - platform data for adc jack device.
- * @name	- name of the extcon device. If null, "adc-jack" is used.
- * @consumer_channel - Unique name to identify the channel on the consumer
- *                   side. This typically describes the channels used within
- *                   the consumer. E.g. 'battery_voltage'
- * @cable_names	- array of cable names ending with null. If the array itself
- *		if null, extcon standard cable names are chosen.
- * @adc_contitions	- array of struct adc_jack_cond conditions ending
- *			with .state = 0 entry. This describes how to decode
- *			adc values into extcon state.
- * @irq_flags	- irq flags used for the @irq
- * @handling_delay_ms	- in some devices, we need to read ADC value some
- *			milli-seconds after the interrupt occurs. You may
- *			describe such delays with @handling_delay_ms, which
- *			is rounded-off by jiffies.
- */
-struct adc_jack_pdata {
-	const char *name;
-	const char *consumer_channel;
-	/*
-	 * NULL if standard extcon names are used.
-	 * The last entry should be NULL
-	 */
-	const char **cable_names;
-	/* The last entry's state should be 0 */
-	struct adc_jack_cond *adc_conditions;
-
-	unsigned long irq_flags;
-	unsigned long handling_delay_ms; /* in ms */
-};
-
-#endif /* _EXTCON_ADC_JACK_H */