From e7191474a5459e6ba7039fadca6a32f3a5731909 Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Sun, 10 Jun 2012 15:16:22 +0200 Subject: HID: uhid: forward open/close events to user-space HID core notifies us with *_open/*_close callbacks when there is an actual user of our device. We forward these to user-space so they can react on this. This allows user-space to skip I/O unless they receive an OPEN event. When they receive a CLOSE event they can stop I/O again to save energy. Signed-off-by: David Herrmann Signed-off-by: Jiri Kosina --- drivers/hid/uhid.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/hid/uhid.c') diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c index 2e7f3a023975..0226ba3f5307 100644 --- a/drivers/hid/uhid.c +++ b/drivers/hid/uhid.c @@ -97,11 +97,16 @@ static void uhid_hid_stop(struct hid_device *hid) static int uhid_hid_open(struct hid_device *hid) { - return 0; + struct uhid_device *uhid = hid->driver_data; + + return uhid_queue_event(uhid, UHID_OPEN); } static void uhid_hid_close(struct hid_device *hid) { + struct uhid_device *uhid = hid->driver_data; + + uhid_queue_event(uhid, UHID_CLOSE); } static int uhid_hid_input(struct input_dev *input, unsigned int type, -- cgit v1.2.3