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authorHeungjun Kim <riverful.kim@samsung.com>2011-02-23 21:40:11 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-02-23 21:43:31 -0800
commitadf779c1ee1d5556ebd83e39a7189022d4ebce3a (patch)
treeadd454348d5a2eca573fa6751fb20d576a5bce8e
parent5ad567ffbaf208bd35bff4341906346c1a1d4574 (diff)
downloadop-kernel-dev-adf779c1ee1d5556ebd83e39a7189022d4ebce3a.zip
op-kernel-dev-adf779c1ee1d5556ebd83e39a7189022d4ebce3a.tar.gz
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>
-rw-r--r--drivers/input/keyboard/mcs_touchkey.c48
-rw-r--r--include/linux/i2c/mcs.h1
2 files changed, 48 insertions, 1 deletions
diff --git a/drivers/input/keyboard/mcs_touchkey.c b/drivers/input/keyboard/mcs_touchkey.c
index 63b849d..03fa59a 100644
--- a/drivers/input/keyboard/mcs_touchkey.c
+++ b/drivers/input/keyboard/mcs_touchkey.c
@@ -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),
diff --git a/include/linux/i2c/mcs.h b/include/linux/i2c/mcs.h
index 725ae7c..61bb18a 100644
--- a/include/linux/i2c/mcs.h
+++ b/include/linux/i2c/mcs.h
@@ -18,6 +18,7 @@
#define MCS_KEY_CODE(v) ((v) & 0xffff)
struct mcs_platform_data {
+ void (*poweron)(bool);
void (*cfg_pin)(void);
/* touchscreen */
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