tree 97cd25981ce3a642721462216be9c9908e424a48
parent b172e89d374a3e151473ed5caf04e298107103a4
author Mike Lockwood <lockwood@android.com> 1229370716 -0500
committer Dmitry Shmidt <dimitrysh@google.com> 1484861503 -0800

ANDROID: input: keychord: Add keychord driver

This driver allows userspace to receive notification when client
specified key combinations are pressed.
The client opens /dev/keychord and writes a list of keychords
for the driver to monitor.
The client then reads or polls /dev/keychord for notifications.
A client specified ID for the keychord is returned from read()
when a keychord press is detected.

Signed-off-by: Mike Lockwood <lockwood@android.com>

keychord: fix to build without CONFIG_PREEMPT

Change-Id: I911f13aeda4224b6fa57863bc7e8972fec8837fb