linux-imx

/*

 * drivers/extcon/extcon-adc-jack.c

 *

 * Analog Jack extcon driver with ADC-based detection capability.

 *

 * Copyright (C) 2016 Samsung Electronics

 * Chanwoo Choi <cw00.choi@samsung.com>

 *

 * 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/module.h>

#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-provider.h>

​

/**

 * struct adc_jack_data - internal data for adc_jack device driver

 * @edev:       extcon device.

 * @cable_names:    list of supported cables.

 * @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 device *dev;

    struct extcon_dev *edev;

​

    const unsigned int **cable_names;

    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;

    bool wakeup_source;

};

​

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);