linux-kernel - Re: [PATCH] arm64: dts: mt8183: support coresight-cpu-debug for mt8183

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Message-ID: <84ab5c30-7661-f225-96c3-59ead2391eec@gmail.com>
Date:   Tue, 14 Sep 2021 20:05:34 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Seiya Wang <seiya.wang@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        srv_heupstream@...iatek.com
Subject: Re: [PATCH] arm64: dts: mt8183: support coresight-cpu-debug for
 mt8183



On 13/09/2021 11:27, Seiya Wang wrote:
> Add coresight-cpu-debug nodes to mt8183 for dumping
> EDPRSR, EDPCSR, EDCIDSR, EDVIDSR
> while kernel panic happens
> 
> Signed-off-by: Seiya Wang <seiya.wang@...iatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8183.dtsi | 64 ++++++++++++++++++++++++++++++++
>   1 file changed, 64 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> index 409cf827970c..3ad4dd47518a 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> @@ -367,6 +367,70 @@
>   			reg = <0 0x0c530a80 0 0x50>;
>   		};
>   
> +		cpu_debug0: cpu-debug@...0000 {
> +			compatible = "arm,coresight-cpu-debug","arm,primecell";

Missing a space:  "arm,coresight-cpu-debug", "arm,primecell";

I suppose that's a copy-paste from the binding doc which is wrong. Other then 
that, things look fine.

Regards,
Matthias

> +			reg = <0x0 0xd410000 0x0 0x1000>;
> +			clocks = <&infracfg CLK_INFRA_DEBUGSYS>;
> +			clock-names = "apb_pclk";
> +			cpu = <&cpu0>;
> +		};
> +
> +		cpu_debug1: cpu-debug@...0000 {
> +			compatible = "arm,coresight-cpu-debug","arm,primecell";
> +			reg = <0x0 0xd510000 0x0 0x1000>;
> +			clocks = <&infracfg CLK_INFRA_DEBUGSYS>;
> +			clock-names = "apb_pclk";
> +			cpu = <&cpu1>;
> +		};
> +
> +		cpu_debug2: cpu-debug@...0000 {
> +			compatible = "arm,coresight-cpu-debug","arm,primecell";
> +			reg = <0x0 0xd610000 0x0 0x1000>;
> +			clocks = <&infracfg CLK_INFRA_DEBUGSYS>;
> +			clock-names = "apb_pclk";
> +			cpu = <&cpu2>;
> +		};
> +
> +		cpu_debug3: cpu-debug@...0000 {
> +			compatible = "arm,coresight-cpu-debug","arm,primecell";
> +			reg = <0x0 0xd710000 0x0 0x1000>;
> +			clocks = <&infracfg CLK_INFRA_DEBUGSYS>;
> +			clock-names = "apb_pclk";
> +			cpu = <&cpu3>;
> +		};
> +
> +		cpu_debug4: cpu-debug@...0000 {
> +			compatible = "arm,coresight-cpu-debug","arm,primecell";
> +			reg = <0x0 0xd810000 0x0 0x1000>;
> +			clocks = <&infracfg CLK_INFRA_DEBUGSYS>;
> +			clock-names = "apb_pclk";
> +			cpu = <&cpu4>;
> +		};
> +
> +		cpu_debug5: cpu-debug@...0000 {
> +			compatible = "arm,coresight-cpu-debug","arm,primecell";
> +			reg = <0x0 0xd910000 0x0 0x1000>;
> +			clocks = <&infracfg CLK_INFRA_DEBUGSYS>;
> +			clock-names = "apb_pclk";
> +			cpu = <&cpu5>;
> +		};
> +
> +		cpu_debug6: cpu-debug@...0000 {
> +			compatible = "arm,coresight-cpu-debug","arm,primecell";
> +			reg = <0x0 0xda10000 0x0 0x1000>;
> +			clocks = <&infracfg CLK_INFRA_DEBUGSYS>;
> +			clock-names = "apb_pclk";
> +			cpu = <&cpu6>;
> +		};
> +
> +		cpu_debug7: cpu-debug@...0000 {
> +			compatible = "arm,coresight-cpu-debug","arm,primecell";
> +			reg = <0x0 0xdb10000 0x0 0x1000>;
> +			clocks = <&infracfg CLK_INFRA_DEBUGSYS>;
> +			clock-names = "apb_pclk";
> +			cpu = <&cpu7>;
> +		};
> +
>   		topckgen: syscon@...00000 {
>   			compatible = "mediatek,mt8183-topckgen", "syscon";
>   			reg = <0 0x10000000 0 0x1000>;
>