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Commit adf779c1 authored by Heungjun Kim's avatar Heungjun Kim Committed by Dmitry Torokhov
Browse files

Input: mcs_touchkey - add support for suspend/resume 



This adds support for system-level suspend/resume to the driver.

Signed-off-by: default avatarHeungjun Kim <riverful.kim@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent 5ad567ff

drivers/input/keyboard/mcs_touchkey.c

+47 −1
Original line number Diff line number Diff line 
/*

 * mcs_touchkey.c - Touchkey driver for MELFAS MCS5000/5080 controller

 * Touchkey driver for MELFAS MCS5000/5080 controller

 *

 * Copyright (C) 2010 Samsung Electronics Co.Ltd

 * Author: HeungJun Kim <riverful.kim@samsung.com>
@@ -19,6 +19,7 @@ 
#include <linux/input.h>

#include <linux/irq.h>

#include <linux/slab.h>

#include <linux/pm.h>



/* MCS5000 Touchkey */

#define MCS5000_TOUCHKEY_STATUS		0x04
@@ -45,6 +46,8 @@ struct mcs_touchkey_chip { 
};



struct mcs_touchkey_data {

	void (*poweron)(bool);



	struct i2c_client *client;

	struct input_dev *input_dev;

	struct mcs_touchkey_chip chip;
@@ -169,6 +172,11 @@ static int __devinit mcs_touchkey_probe(struct i2c_client *client, 
	if (pdata->cfg_pin)

		pdata->cfg_pin();



	if (pdata->poweron) {

		data->poweron = pdata->poweron;

		data->poweron(true);

	}



	error = request_threaded_irq(client->irq, NULL, mcs_touchkey_interrupt,

			IRQF_TRIGGER_FALLING, client->dev.driver->name, data);

	if (error) {
@@ -196,12 +204,49 @@ static int __devexit mcs_touchkey_remove(struct i2c_client *client) 
	struct mcs_touchkey_data *data = i2c_get_clientdata(client);



	free_irq(client->irq, data);

	if (data->poweron)

		data->poweron(false);

	input_unregister_device(data->input_dev);

	kfree(data);



	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int mcs_touchkey_suspend(struct device *dev)

{

	struct mcs_touchkey_data *data = dev_get_drvdata(dev);

	struct i2c_client *client = data->client;



	/* Disable the work */

	disable_irq(client->irq);



	/* Finally turn off the power */

	if (data->poweron)

		data->poweron(false);



	return 0;

}



static int mcs_touchkey_resume(struct device *dev)

{

	struct mcs_touchkey_data *data = dev_get_drvdata(dev);

	struct i2c_client *client = data->client;



	/* Enable the device first */

	if (data->poweron)

		data->poweron(true);



	/* Enable irq again */

	enable_irq(client->irq);



	return 0;

}

#endif



static SIMPLE_DEV_PM_OPS(mcs_touchkey_pm_ops,

			 mcs_touchkey_suspend, mcs_touchkey_resume);



static const struct i2c_device_id mcs_touchkey_id[] = {

	{ "mcs5000_touchkey", MCS5000_TOUCHKEY },

	{ "mcs5080_touchkey", MCS5080_TOUCHKEY },
@@ -213,6 +258,7 @@ static struct i2c_driver mcs_touchkey_driver = { 
	.driver = {

		.name	= "mcs_touchkey",

		.owner	= THIS_MODULE,

		.pm	= &mcs_touchkey_pm_ops,

	},

	.probe		= mcs_touchkey_probe,

	.remove		= __devexit_p(mcs_touchkey_remove),

include/linux/i2c/mcs.h

+1 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#define MCS_KEY_CODE(v)		((v) & 0xffff)



struct mcs_platform_data {

	void (*poweron)(bool);

	void (*cfg_pin)(void);



	/* touchscreen */