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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: Heungjun Kim <riverful.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Heungjun Kim 2011-02-23 21:40:11 -08:00 committed by Dmitry Torokhov
parent 5ad567ffba
commit adf779c1ee
2 changed files with 48 additions and 1 deletions
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48
drivers/input/keyboard/mcs_touchkey.c
View File

@ -1,5 +1,5 @@
/*
* 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
include/linux/i2c/mcs.h
View File

@ -18,6 +18,7 @@
#define MCS_KEY_CODE(v) ((v) & 0xffff)
struct mcs_platform_data {
void (*poweron)(bool);
void (*cfg_pin)(void);
/* touchscreen */