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| author | David Herrmann <dh.herrmann@googlemail.com> | 2012-06-10 15:16:22 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2012-06-18 13:42:02 +0200 |
| commit | e7191474a5459e6ba7039fadca6a32f3a5731909 (patch) | |
| tree | 004e573b35323ae0b92907334a4ef12e4aed4fe2 | |
| parent | ec4b7dea453e0f9fd0fbf1761b2d01eff64f264b (diff) | |
| download | linux-e7191474a5459e6ba7039fadca6a32f3a5731909.tar.gz linux-e7191474a5459e6ba7039fadca6a32f3a5731909.tar.bz2 linux-e7191474a5459e6ba7039fadca6a32f3a5731909.zip | |
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 <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | drivers/hid/uhid.c | 7 | ||||
| -rw-r--r-- | include/linux/uhid.h | 2 |
2 files changed, 8 insertions, 1 deletions
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, diff --git a/include/linux/uhid.h b/include/linux/uhid.h index f8ce6f7571d8..351650b7a0f6 100644 --- a/include/linux/uhid.h +++ b/include/linux/uhid.h @@ -27,6 +27,8 @@ enum uhid_event_type { UHID_DESTROY, UHID_START, UHID_STOP, + UHID_OPEN, + UHID_CLOSE, UHID_INPUT, }; |