Re: [PATCH 19/20] arm64: dts: fsd: Add MFC related DT enteries

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

On 17/05/2022 14:55, Smitha T Murthy wrote:
> Add MFC DT node and reserve memory node for MFC usage.
> 
> Cc: linux-fsd@tesla.com
> Signed-off-by: Smitha T Murthy <smitha.t@samsung.com>
> ---
>  arch/arm64/boot/dts/tesla/fsd-evb.dts |  8 ++++++++
>  arch/arm64/boot/dts/tesla/fsd.dtsi    | 22 ++++++++++++++++++++++
>  2 files changed, 30 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/tesla/fsd-evb.dts b/arch/arm64/boot/dts/tesla/fsd-evb.dts
> index 5af560c1b5e6..36f6b013ce99 100644
> --- a/arch/arm64/boot/dts/tesla/fsd-evb.dts
> +++ b/arch/arm64/boot/dts/tesla/fsd-evb.dts
> @@ -37,3 +37,11 @@
>  &serial_0 {
>  	status = "okay";
>  };
> +
> +&clock_mfc {
> +	status = "okay";
> +};
> +
> +&mfc_0 {
> +	status = "okay";
> +};

Labels are ordered by name.

> diff --git a/arch/arm64/boot/dts/tesla/fsd.dtsi b/arch/arm64/boot/dts/tesla/fsd.dtsi
> index 9a652abcbcac..434ae75421d8 100644
> --- a/arch/arm64/boot/dts/tesla/fsd.dtsi
> +++ b/arch/arm64/boot/dts/tesla/fsd.dtsi
> @@ -249,6 +249,18 @@
>  		#clock-cells = <0>;
>  	};
>  
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		mfc_left: region@84000000 {
> +			compatible = "shared-dma-pool";
> +			no-map;
> +			reg = <0 0x84000000 0 0x8000000>;
> +		};
> +	};
> +
>  	soc: soc@0 {
>  		compatible = "simple-bus";
>  		#address-cells = <2>;
> @@ -748,6 +760,16 @@
>  			clocks = <&fin_pll>, <&clock_imem IMEM_MCT_PCLK>;
>  			clock-names = "fin_pll", "mct";
>  		};
> +
> +		mfc_0: mfc0@12880000 {

Generic node names, so mfc.

> +			compatible = "samsung,mfc-v12";
> +			reg = <0x0 0x12880000 0x0 0x10000>;
> +			interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>;
> +			clock-names = "mfc";
> +			clocks = <&clock_mfc MFC_MFC_IPCLKPORT_ACLK>;
> +			memory-region = <&mfc_left>;
> +			status = "disabled";

Why exactly this is disabled? Usually we disable nodes which needs
resources from the boards, but this is not the case here. Unless it is?

> +		};
>  	};
>  };
>  


Best regards,
Krzysztof