linux-kernel - Re: [PATCH 1/1] arm64: dts: imx8mp: remove arm,primecell-periphid at etm nodes

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Message-ID: <ZLVMCpNWB1xCvQzM@lizhi-Precision-Tower-5810>
Date:   Mon, 17 Jul 2023 10:11:22 -0400
From:   Frank Li <Frank.li@....com>
To:     suzuki.poulose@....com, coresight@...ts.linaro.org,
        imx@...ts.linux.dev, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Marek Vasut <marex@...x.de>, Peng Fan <peng.fan@....com>,
        Alexander Stein <alexander.stein@...tq-group.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Adam Ford <aford173@...il.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] arm64: dts: imx8mp: remove arm,primecell-periphid at
 etm nodes

On Wed, Jul 05, 2023 at 04:59:53PM -0400, Frank Li wrote:
> The reg size of etm nodes is incorrectly set to 64k instead of 4k. This
> leads to a crash when calling amba_read_periphid().  After corrected reg
> size, amba_read_periphid() retrieve the correct periphid.
> arm,primecell-periphid were removed from the etm nodes.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---

@shawn:
	Acutally the all comments is clear. No further change needed.

Frank

>  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> index cc406bb338fe..e0ca82ff6f15 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -306,8 +306,7 @@ soc: soc@0 {
>  
>  		etm0: etm@...40000 {
>  			compatible = "arm,coresight-etm4x", "arm,primecell";
> -			reg = <0x28440000 0x10000>;
> -			arm,primecell-periphid = <0xbb95d>;
> +			reg = <0x28440000 0x1000>;
>  			cpu = <&A53_0>;
>  			clocks = <&clk IMX8MP_CLK_MAIN_AXI>;
>  			clock-names = "apb_pclk";
> @@ -323,8 +322,7 @@ etm0_out_port: endpoint {
>  
>  		etm1: etm@...40000 {
>  			compatible = "arm,coresight-etm4x", "arm,primecell";
> -			reg = <0x28540000 0x10000>;
> -			arm,primecell-periphid = <0xbb95d>;
> +			reg = <0x28540000 0x1000>;
>  			cpu = <&A53_1>;
>  			clocks = <&clk IMX8MP_CLK_MAIN_AXI>;
>  			clock-names = "apb_pclk";
> @@ -340,8 +338,7 @@ etm1_out_port: endpoint {
>  
>  		etm2: etm@...40000 {
>  			compatible = "arm,coresight-etm4x", "arm,primecell";
> -			reg = <0x28640000 0x10000>;
> -			arm,primecell-periphid = <0xbb95d>;
> +			reg = <0x28640000 0x1000>;
>  			cpu = <&A53_2>;
>  			clocks = <&clk IMX8MP_CLK_MAIN_AXI>;
>  			clock-names = "apb_pclk";
> @@ -357,8 +354,7 @@ etm2_out_port: endpoint {
>  
>  		etm3: etm@...40000 {
>  			compatible = "arm,coresight-etm4x", "arm,primecell";
> -			reg = <0x28740000 0x10000>;
> -			arm,primecell-periphid = <0xbb95d>;
> +			reg = <0x28740000 0x1000>;
>  			cpu = <&A53_3>;
>  			clocks = <&clk IMX8MP_CLK_MAIN_AXI>;
>  			clock-names = "apb_pclk";
> -- 
> 2.34.1
>