linux-kernel - Re: [PATCH v3 4/6] arm64: dts: mediatek: mt2712e: Add mediatek,infracfg phandle for IOMMU

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Date:   Fri, 10 Jun 2022 02:08:45 +0800
From:   Miles Chen <miles.chen@...iatek.com>
To:     <angelogioacchino.delregno@...labora.com>
CC:     <devicetree@...r.kernel.org>, <iommu@...ts.linux-foundation.org>,
        <joro@...tes.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <krzysztof.kozlowski@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <matthias.bgg@...il.com>,
        <robh+dt@...nel.org>, <will@...nel.org>, <yong.wu@...iatek.com>
Subject: Re: [PATCH v3 4/6] arm64: dts: mediatek: mt2712e: Add mediatek,infracfg phandle for IOMMU

> The IOMMU driver now looks for the "mediatek,infracfg" phandle as a
> new way to retrieve a syscon to that:
> even though the old way is retained, it has been deprecated and the
> driver will write a message in kmsg advertising to use the phandle
> way instead.
> 
> For this reason, assign the right phandle to mediatek,infracfg in
> the iommu node.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Reviewed-by: Miles Chen <miles.chen@...iatek.com> 

> ---
>  arch/arm64/boot/dts/mediatek/mt2712e.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt2712e.dtsi b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
> index 623eb3beabf2..4797537cb368 100644
> --- a/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
> @@ -329,6 +329,7 @@ iommu0: iommu@...05000 {
>  		interrupts = <GIC_SPI 147 IRQ_TYPE_LEVEL_LOW>;
>  		clocks = <&infracfg CLK_INFRA_M4U>;
>  		clock-names = "bclk";
> +		mediatek,infracfg = <&infracfg>;
>  		mediatek,larbs = <&larb0>, <&larb1>, <&larb2>,
>  				 <&larb3>, <&larb6>;
>  		#iommu-cells = <1>;
> @@ -346,6 +347,7 @@ iommu1: iommu@...0a000 {
>  		interrupts = <GIC_SPI 145 IRQ_TYPE_LEVEL_LOW>;
>  		clocks = <&infracfg CLK_INFRA_M4U>;
>  		clock-names = "bclk";
> +		mediatek,infracfg = <&infracfg>;
>  		mediatek,larbs = <&larb4>, <&larb5>, <&larb7>;
>  		#iommu-cells = <1>;
>  	};
> -- 
> 2.35.1
> 
>