From 33f4acd3b214fee9662cbaf569a4876b8604f152 Mon Sep 17 00:00:00 2001
From: David Henningsson <david.henningsson@canonical.com>
Date: Wed, 7 Jan 2015 15:50:13 +0100
Subject: [PATCH] ALSA: hda - Enable mic mute hotkey and LEDs for an HP machine

On this machine, the mic mute hotkey is connected to GPIO2. We therefore
create an extra input device for this key.

Also enable LEDs connected to GPIO3 and GPIO4.

(Note: if this patch is backported to older kernels, where KEY_MIC_MUTE is
not available, change the KEY_MIC_MUTE to KEY_F20, which was previously used
for mic mute keys.)

BugLink: https://bugs.launchpad.net/bugs/1408295
Tested-by: Keng-Yu Lin <keng-yu.lin@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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