linux-kernel - Re: [Patch v2 15/15] arm64: dts: fsd: Add MFC related DT enteries

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Message-ID: <783df4f0-0b7e-8604-d61f-f78e0375c321@linaro.org>
Date:   Wed, 7 Sep 2022 13:25:48 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Smitha T Murthy <smitha.t@...sung.com>,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc:     m.szyprowski@...sung.com, andrzej.hajda@...el.com,
        mchehab@...nel.org, hverkuil-cisco@...all.nl,
        ezequiel@...guardiasur.com.ar, jernej.skrabec@...il.com,
        benjamin.gaignard@...labora.com, stanimir.varbanov@...aro.org,
        dillon.minfei@...il.com, david.plowman@...pberrypi.com,
        mark.rutland@....com, robh+dt@...nel.org, krzk+dt@...nel.org,
        andi@...zian.org, alim.akhtar@...sung.com,
        aswani.reddy@...sung.com, pankaj.dubey@...sung.com,
        linux-fsd@...la.com, aakarsh.jain@...sung.com
Subject: Re: [Patch v2 15/15] arm64: dts: fsd: Add MFC related DT enteries

On 07/09/2022 08:47, Smitha T Murthy wrote:
> Add MFC DT node and reserve memory node for MFC usage.
> 
> Cc: linux-fsd@...la.com
> Signed-off-by: Smitha T Murthy <smitha.t@...sung.com>
> ---
>  arch/arm64/boot/dts/tesla/fsd-evb.dts |  4 ++++
>  arch/arm64/boot/dts/tesla/fsd.dtsi    | 22 ++++++++++++++++++++++
>  2 files changed, 26 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/tesla/fsd-evb.dts b/arch/arm64/boot/dts/tesla/fsd-evb.dts
> index 1db6ddf03f01..17bb048f9d47 100644
> --- a/arch/arm64/boot/dts/tesla/fsd-evb.dts
> +++ b/arch/arm64/boot/dts/tesla/fsd-evb.dts
> @@ -30,6 +30,10 @@
>  	};
>  };
>  
> +&clock_mfc {
> +	status = "okay";

clock node was never disabled, so there is no need to enable it.

> +};
> +
>  &fin_pll {
>  	clock-frequency = <24000000>;
>  };
> diff --git a/arch/arm64/boot/dts/tesla/fsd.dtsi b/arch/arm64/boot/dts/tesla/fsd.dtsi
> index f35bc5a288c2..bca0ba030ee7 100644
> --- a/arch/arm64/boot/dts/tesla/fsd.dtsi
> +++ b/arch/arm64/boot/dts/tesla/fsd.dtsi
> @@ -340,6 +340,18 @@
>  		#clock-cells = <0>;
>  	};
>  
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		mfc_left: region@...00000 {
> +			compatible = "shared-dma-pool";
> +			no-map;
> +			reg = <0 0x84000000 0 0x8000000>;
> +		};
> +	};
> +
>  	soc: soc@0 {
>  		compatible = "simple-bus";
>  		#address-cells = <2>;
> @@ -832,6 +844,16 @@
>  			clock-names = "fin_pll", "mct";
>  		};
>  
> +		mfc: mfc@...80000 {
> +			compatible = "samsung,fsd-mfc";
> +			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 = "okay";

Okay is by default, don't add it.

> +		};
> +
>  		ufs: ufs@...20000 {
>  			compatible = "tesla,fsd-ufs";
>  			reg = <0x0 0x15120000 0x0 0x200>,  /* 0: HCI standard */


Best regards,
Krzysztof