commit c87992d1fa51a6a3d8f0e980ca4d2bdec7e78a17
author AceLan Kao <acelan.kao@canonical.com> Tue Mar 20 09:53:08 2012 +0100
committer Matthew Garrett <mjg@redhat.com> Mon Mar 26 15:05:41 2012 -0400
tree c702643e69183fcc5cb5f5b8b4f1e429ff1366fb
parent bde9e5098c121cfca6d9c7e3a26e6ae44a3c9632

asus-wmi: add scalar board brightness adj. support

Some ASUS ET2012E/I All-in-One machines that use a scalar board
to control the brightness, and they only accept brightness up and down
command. So, I introduced a get_scalar_command() function to pass the
command to the scalar board through WMI.

Besides, we have to store the brightness value locally, for we need the
old value to know the brightness value is increasing or decreasing.

BTW, since there is no way to retrieve the actual brightness(it would be
a fixed value), and the max brightness value would be fixed to 1, so we
have to keep passing the brightness up/down command when we reached the
max brightness value or 0.

Signed-off-by: AceLan Kao <acelan.kao@canonical.com>
Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>