Implement open() and close() methods for the input device so that we
do not start the device unless there are users listening to the events.
Signed-off-by: Dmitry Torokhov <dtor@xxxxxxx>
---
drivers/input/touchscreen/wacom_w8001.c | 21 ++++++++++++++++++++-
1 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/drivers/input/touchscreen/wacom_w8001.c b/drivers/input/touchscreen/wacom_w8001.c
index c14412e..5ece6c1 100644
--- a/drivers/input/touchscreen/wacom_w8001.c
+++ b/drivers/input/touchscreen/wacom_w8001.c
@@ -367,6 +367,20 @@ static int w8001_command(struct w8001 *w8001, unsigned char command,
return rc;
}
+static int w8001_open(struct input_dev *dev)
+{
+ struct w8001 *w8001 = input_get_drvdata(dev);
+
+ return w8001_command(w8001, W8001_CMD_START, false);
+}
+
+static void w8001_close(struct input_dev *dev)
+{
+ struct w8001 *w8001 = input_get_drvdata(dev);
+
+ w8001_command(w8001, W8001_CMD_STOP, false);
+}
+
static int w8001_setup(struct w8001 *w8001)
{
struct input_dev *dev = w8001->dev;
@@ -474,7 +488,7 @@ static int w8001_setup(struct w8001 *w8001)
strlcat(w8001->name, " Touchscreen", sizeof(w8001->name));
- return w8001_command(w8001, W8001_CMD_START, false);
+ return 0;
}
/*
@@ -534,6 +548,11 @@ static int w8001_connect(struct serio *serio, struct serio_driver *drv)
input_dev->id.version = 0x0100;
input_dev->dev.parent = &serio->dev;
+ input_dev->open = w8001_open;
+ input_dev->close = w8001_close;
+
+ input_set_drvdata(input_dev, w8001);
+
err = input_register_device(w8001->dev);
if (err)
goto fail3;
--
1.7.6
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