linux-kernel - Re: [PATCH] arm64: dts: qcom: sm8450: delete incorrect ufs interconnect fields

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Message-ID: <e41c26c2-8aa4-cfd2-27b0-eb011f45eda0@linaro.org>
Date:   Thu, 7 Apr 2022 22:40:27 +0300
From:   Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>
To:     Jonathan Marek <jonathan@...ek.ca>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Vinod Koul <vkoul@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sm8450: delete incorrect ufs
 interconnect fields

On 4/7/22 20:21, Jonathan Marek wrote:
> Upstream sm8450.dtsi has #interconnect-cells = <2>; so these are wrong.
> Ignored and undocumented with upstream UFS driver so delete for now.

Basically the description was added by a commit 462c5c0aa798 ("dt-bindings: ufs:
qcom,ufs: convert to dtschema").

It's questionable, if an example in the new yaml file is totally correct
in connection to the discussed issue.

> Fixes: aa2d0bf04a3c ("arm64: dts: qcom: sm8450: add interconnect nodes")
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> ---
>   arch/arm64/boot/dts/qcom/sm8450.dtsi | 3 ---
>   1 file changed, 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 2c18e1ef9e82d..90cdbec3cac99 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -1663,9 +1663,6 @@ ufs_mem_hc: ufshc@...4000 {
>   
>   			iommus = <&apps_smmu 0xe0 0x0>;
>   
> -			interconnects = <&aggre1_noc MASTER_UFS_MEM &mc_virt SLAVE_EBI1>,
> -					<&gem_noc MASTER_APPSS_PROC &config_noc SLAVE_UFS_MEM_CFG>;
> -			interconnect-names = "ufs-ddr", "cpu-ufs";
>   			clock-names =
>   				"core_clk",
>   				"bus_aggr_clk",

You may look at https://lore.kernel.org/linux-arm-msm/20220310221934.1560729-1-vladimir.zapolskiy@linaro.org/

--
Best wishes,
Vladimir