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path: root/drivers/input/keyboard/mcs_touchkey.c
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Diffstat (limited to 'drivers/input/keyboard/mcs_touchkey.c')
-rw-r--r--drivers/input/keyboard/mcs_touchkey.c57
1 files changed, 56 insertions, 1 deletions
diff --git a/drivers/input/keyboard/mcs_touchkey.c b/drivers/input/keyboard/mcs_touchkey.c
index 63b849d..af1aab3 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 +204,57 @@ 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;
}
+static void mcs_touchkey_shutdown(struct i2c_client *client)
+{
+ struct mcs_touchkey_data *data = i2c_get_clientdata(client);
+
+ if (data->poweron)
+ data->poweron(false);
+}
+
+#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 },
@@ -213,9 +266,11 @@ 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),
+ .shutdown = mcs_touchkey_shutdown,
.id_table = mcs_touchkey_id,
};
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