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>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
index b639006da7e1..f3b6219cc09e 100644
--- 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",