linux-kernel - Re: [PATCH RFC 2/6] arm64: dts: qcom: ipq5424: Add the IMEM node

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Message-ID: <6298f149-caae-49d0-af68-c3d102d0ef7d@oss.qualcomm.com>
Date: Wed, 9 Apr 2025 20:41:19 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org
Subject: Re: [PATCH RFC 2/6] arm64: dts: qcom: ipq5424: Add the IMEM node

On 4/8/25 10:49 AM, Kathiravan Thirumoorthy wrote:
> Add the IMEM node to the device tree to extract debugging information
> like system restart reason, which is populated via IMEM. Define the
> IMEM region to enable this functionality. Corresponding DTS and driver
> changes will be added incrementally.
> 
> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/ipq5424.dtsi | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq5424.dtsi b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
> index 5d6ed2172b1bb0a57c593f121f387ec917f42419..a772736f314f46d11c473160c522af4edeb900b7 100644
> --- a/arch/arm64/boot/dts/qcom/ipq5424.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
> @@ -486,6 +486,15 @@ ssphy_0: phy@...00 {
>  			status = "disabled";
>  		};
>  
> +		sram@...0000 {
> +			compatible = "qcom,ipq5424-imem", "syscon", "simple-mfd";
> +			reg = <0 0x08600000 0 0x1000>;
> +			ranges = <0 0 0x08600000 0x1000>;

It looks like this should be a little longer

Konrad