ARM: dts: r8a7743: Add audio clocks

Describe the external audio clocks required by the sound driver.
Boards that provide audio clocks need to override the clock frequencies.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm/boot/dts/r8a7743.dtsi b/arch/arm/boot/dts/r8a7743.dtsi
index c09c667..2f0ec9d 100644 (file)
--- a/arch/arm/boot/dts/r8a7743.dtsi
+++ b/arch/arm/boot/dts/r8a7743.dtsi
@@ -1238,6 +1238,29 @@
                clock-frequency = <0>;
        };
 
+       /*
+        * 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>;
+       };
+
+       audio_clk_b: audio_clk_b {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <0>;
+       };
+
+       audio_clk_c: audio_clk_c {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <0>;
+       };
+
        /* External USB clock - can be overridden by the board */
        usb_extal_clk: usb_extal {
                compatible = "fixed-clock";