commit ddf9ea21f5fa0832c9711ae13dd467d1f5c4cd87
author Anatol Pomozov <anatol.pomozov@gmail.com> Thu Jan 22 15:47:16 2015 -0800
committer Mark Brown <broonie@kernel.org> Tue Jan 27 18:32:04 2015 +0000
tree a72a5aa558b54829932842b7e5b73bef262908b1
parent 97bf6af1f928216fd6c5a66e8a57bfa95a659672

ASoC: ts3a227e: Remap keys to match Android headset specification

ts3a227e datasheet says typical key resistance is
  key1 50 Ohm
  key2 135 Ohm
  key3 240 Ohm
  key4 470 Ohm

The android headset specification expect buttons impedance:
  A (MEDIA) 0-70 Ohm
  D (VOICECOMMAND) 110-180 Ohm
  B (VOLUMEUP) 210-290 Ohm
  C (VOLUMEDOWN) 360-680 Ohm

Thus key mapping should be
  key1 - MEDIA
  key2 - VOICECOMMAND
  key3 - VOLUMEUP
  key3 - VOLUMEDOWN

Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Acked-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/ts3a227e.c

diff --git a/sound/soc/codecs/ts3a227e.c b/sound/soc/codecs/ts3a227e.c
index 1d12057..b55034f 100644
--- a/sound/soc/codecs/ts3a227e.c
+++ b/sound/soc/codecs/ts3a227e.c
@@ -221,9 +221,9 @@
 	struct ts3a227e *ts3a227e = snd_soc_component_get_drvdata(component);
 
 	snd_jack_set_key(jack->jack, SND_JACK_BTN_0, KEY_MEDIA);
-	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOLUMEUP);
-	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEDOWN);
-	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOICECOMMAND);
+	snd_jack_set_key(jack->jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
+	snd_jack_set_key(jack->jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
+	snd_jack_set_key(jack->jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
 
 	ts3a227e->jack = jack;
 	ts3a227e_jack_report(ts3a227e);