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Commit adf779c1 authored by Heungjun Kim's avatar Heungjun Kim Committed by Dmitry Torokhov
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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
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+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),
+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 */