ARM: shmobile: r8a7791: add audio clock on DTSI

audio_clk_a/b/c are required from sound driver

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
(cherry picked from commit 0d3dbde84a45977cdd7d85115cd5ea1b4ede312e)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
index 76150f1..37a4ea7 100644 (file)
--- a/arch/arm/boot/dts/r8a7791.dtsi
+++ b/arch/arm/boot/dts/r8a7791.dtsi
@@ -532,6 +532,29 @@
                        clock-output-names = "extal";
                };
 
+               /*
+                * The external audio clocks are configured as 0 Hz fixed frequency clocks by
+                * default. Boards that provide audio clocks should override them.
+                */
+               audio_clk_a: audio_clk_a {
+                       compatible = "fixed-clock";
+                       #clock-cells = <0>;
+                       clock-frequency = <0>;
+                       clock-output-names = "audio_clk_a";
+               };
+               audio_clk_b: audio_clk_b {
+                       compatible = "fixed-clock";
+                       #clock-cells = <0>;
+                       clock-frequency = <0>;
+                       clock-output-names = "audio_clk_b";
+               };
+               audio_clk_c: audio_clk_c {
+                       compatible = "fixed-clock";
+                       #clock-cells = <0>;
+                       clock-frequency = <0>;
+                       clock-output-names = "audio_clk_c";
+               };
+
                /* Special CPG clocks */
                cpg_clocks: cpg_clocks@e6150000 {
                        compatible = "renesas,r8a7791-cpg-clocks",