[PATCH] arm64: dts: renesas: eagle: Add x1 clock

[Kieran Bingham]

Hi Geert, Valentine,

On 04/05/2021 10:14, Geert Uytterhoeven wrote:
> From: Valentine Barshak <valentine.barshak at cogentembedded.com>
> 
> This adds X1 clock which supplies a frequency of 148.5 MHz.
> This clock is connected to the external dot clock input signal.
> 
> Signed-off-by: Valentine Barshak <valentine.barshak at cogentembedded.com>
> [geert: Verified schematics]
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> ---
> Untested due to lack of hardware

Tested on my Eagle-V3M with running the DU tests:

  Testing composition on CRTC 46: SUCCESS
  Testing connector HDMI-A-1: SUCCESS
  Testing plane formats: SUCCESS
  Testing legacy mode set on connector HDMI-A-1: SUCCESS
  Testing modes on connector HDMI-A-1: SUCCESS
  Testing atomic mode set on connector HDMI-A-1: SUCCESS
  Testing page flip on connector HDMI-A-1: SUCCESS
  Testing plane positioning boundaries: SUCCESS

and verifying that the output visible was as expected.

Tested-by: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>

> ---
>  arch/arm64/boot/dts/renesas/r8a77970-eagle.dts | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> index 874a7fc2730b00db..5c84681703edad2e 100644
> --- a/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> +++ b/arch/arm64/boot/dts/renesas/r8a77970-eagle.dts
> @@ -73,6 +73,12 @@ memory at 48000000 {
>  		/* first 128MB is reserved for secure area. */
>  		reg = <0x0 0x48000000 0x0 0x38000000>;
>  	};
> +
> +	x1_clk: x1-clock {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <148500000>;
> +	};
>  };
>  
>  &avb {
> @@ -104,6 +110,8 @@ channel0 {
>  };
>  
>  &du {
> +	clocks = <&cpg CPG_MOD 724>, <&x1_clk>;
> +	clock-names = "du.0", "dclkin.0";
>  	status = "okay";
>  };
>  
>