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 <[email protected]>
Reviewed-by: Fabrizio Castro <[email protected]>
---
 arch/arm/boot/dts/r8a7743.dtsi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7743.dtsi b/arch/arm/boot/dts/r8a7743.dtsi
index c09c667..2f0ec9d 100644
--- 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";
-- 
1.9.1

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