[PATCH] arm64: renesas: ulcb: add Sample Audio Codec settings

[Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>]

ulcb{-kf} needs amixer settings to use Audio. This patch adds Sample
settings for it, for not to forget.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
 arch/arm64/boot/dts/renesas/ulcb-kf.dtsi | 19 ++++++++++++++++++-
 arch/arm64/boot/dts/renesas/ulcb.dtsi    |  6 ++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
index 431b37bf56619..9c4a5571ad7fa 100644
--- a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
@@ -5,7 +5,24 @@
  * Copyright (C) 2017 Renesas Electronics Corp.
  * Copyright (C) 2017 Cogent Embedded, Inc.
  */
-
+/*
+ * Sample Audio settings
+ *
+ *	> amixer set "DVC Out" 1%
+ *	> amixer set "DVC In"  20%
+ *
+ *	// if you use xxxx-mix+split.dtsi
+ *	> amixer -D hw:1 set "pcm3168a DAC1" 50%
+ *	> amixer -D hw:1 set "pcm3168a DAC2" 50%
+ *	> amixer -D hw:1 set "pcm3168a DAC3" 50%
+ *	> amixer -D hw:1 set "pcm3168a DAC4" 50%
+ *
+ *	// else
+ *	> amixer -D hw:1 set "DAC1" 50%
+ *	> amixer -D hw:1 set "DAC2" 50%
+ *	> amixer -D hw:1 set "DAC3" 50%
+ *	> amixer -D hw:1 set "DAC4" 50%
+ */
 / {
 	aliases {
 		serial1 = &hscif0;
diff --git a/arch/arm64/boot/dts/renesas/ulcb.dtsi b/arch/arm64/boot/dts/renesas/ulcb.dtsi
index a2f66f9160484..8b8b5d9a19bb9 100644
--- a/arch/arm64/boot/dts/renesas/ulcb.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb.dtsi
@@ -5,6 +5,12 @@
  * Copyright (C) 2016 Renesas Electronics Corp.
  * Copyright (C) 2016 Cogent Embedded, Inc.
  */
+/*
+ * Sample Audio settings
+ *
+ *	> amixer set "DVC Out" 1%
+ *	> amixer set "DVC In"  20%
+ */
 
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
-- 
2.43.0