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Input: wacom_w8001 - implement open and close 

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.

Acked-by: Chris Bagwell <chris@cnpbagwell.com>
Tested-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2011-08-23 22:57:00 -07:00
parent c17ca3f5a2
commit e9496746cc
1 changed files with 20 additions and 1 deletions
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21
drivers/input/touchscreen/wacom_w8001.c
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@ -367,6 +367,20 @@ static int w8001_command(struct w8001 *w8001, unsigned char command,
return rc; 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) static int w8001_setup(struct w8001 *w8001)
{ {
struct input_dev *dev = w8001->dev; struct input_dev *dev = w8001->dev;
@ -474,7 +488,7 @@ static int w8001_setup(struct w8001 *w8001)
strlcat(w8001->name, " Touchscreen", sizeof(w8001->name)); 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->id.version = 0x0100;
input_dev->dev.parent = &serio->dev; 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); err = input_register_device(w8001->dev);
if (err) if (err)
goto fail3; goto fail3;