ASoC: dt-bindings: mt8183: add missing update

Headset codec is optional.  Add missing update to DT binding document.

Fixes: a962a809e5e4 ("ASoC: mediatek: mt8183: make headset codec optional")
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20190920112320.166052-1-tzungbi@google.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/mt8183-mt6358-ts3a227-max98357.txt b/Documentation/devicetree/bindings/sound/mt8183-mt6358-ts3a227-max98357.txt
index d6d5207fa996a27009c220fce439f3fb539ac7bb..17ff3892f4391946e708b8efda24dd66756a0b8d 100644 (file)
--- a/Documentation/devicetree/bindings/sound/mt8183-mt6358-ts3a227-max98357.txt
+++ b/Documentation/devicetree/bindings/sound/mt8183-mt6358-ts3a227-max98357.txt
@@ -2,9 +2,11 @@ MT8183 with MT6358, TS3A227 and MAX98357 CODECS
 
 Required properties:
 - compatible : "mediatek,mt8183_mt6358_ts3a227_max98357"
-- mediatek,headset-codec: the phandles of ts3a227 codecs
 - mediatek,platform: the phandle of MT8183 ASoC platform
 
+Optional properties:
+- mediatek,headset-codec: the phandles of ts3a227 codecs
+
 Example:
 
        sound {