HID: uhid: Add UHID_CREATE2 + UHID_INPUT2
authorPetri Gynther <pgynther@google.com>
Mon, 24 Mar 2014 20:50:01 +0000 (13:50 -0700)
committerJiri Kosina <jkosina@suse.cz>
Tue, 1 Apr 2014 16:27:33 +0000 (18:27 +0200)
commit4522643aa9630be17238edf1b4c0b690c5dd7f5d
tree4476b31d4cab4643baeaf0877e21da51f69c7ad2
parentc3d77fab51f40821de91a744e4b514e9e4e76a7c
HID: uhid: Add UHID_CREATE2 + UHID_INPUT2

UHID_CREATE2:
HID report descriptor data (rd_data) is an array in struct uhid_create2_req,
instead of a pointer. Enables use from languages that don't support pointers,
e.g. Python.

UHID_INPUT2:
Data array is the last field of struct uhid_input2_req. Enables userspace to
write only the required bytes to kernel (ev.type + ev.u.input2.size + the part
of the data array that matters), instead of the entire struct uhid_input2_req.

Note:
UHID_CREATE2 increases the total size of struct uhid_event slightly, thus
increasing the size of messages that are queued for userspace. However, this
won't affect the userspace processing of these events.

[Jiri Kosina <jkosina@suse.cz>: adjust to hid_get_raw_report() and
hid_output_raw_report() API changes]

Signed-off-by: Petri Gynther <pgynther@google.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Documentation/hid/uhid.txt
drivers/hid/uhid.c
include/uapi/linux/uhid.h