linux-kernel - Re: [PATCH] arm64: dts: qcom: ipq5424: Add support for emergency download mode

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Message-ID: <vzxop3tp6zjql23juykhnyf6fq6df45ikppw7jwp3oktfrymvg@iys54hjpk65p>
Date: Mon, 1 Sep 2025 11:06:59 -0500
From: Bjorn Andersson <andersson@...nel.org>
To: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
Cc: Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: ipq5424: Add support for emergency
 download mode

On Thu, Aug 28, 2025 at 01:25:31PM +0530, Kathiravan Thirumoorthy wrote:
> Enable support for the vendor-specific SYSTEM_RESET2 reset in PSCI reboot
> modes. Using "edl" as the reboot mode will reboot the device into emergency
> download mode, allowing image loading via the USB interface at the Primary
> Boot Loader (PBL) stage.
> 
> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
> ---
> Depends-on:
> https://lore.kernel.org/linux-arm-msm/20250815-arm-psci-system_reset2-vendor-reboots-v14-10-37d29f59ac9a@oss.qualcomm.com/

This hasn't been merged, so there's not much I can do with this patch.
Please resubmit once the dependencies are in linux-next.

Thank you,
Bjorn

> ---
>  arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts | 6 ++++++
>  arch/arm64/boot/dts/qcom/ipq5424.dtsi       | 2 +-
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> index 738618551203b9fb58ee3d6f7b7a46b38eea4bf4..b47b0be41a61438c922b1e29d9a2ebc37fca2d70 100644
> --- a/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> +++ b/arch/arm64/boot/dts/qcom/ipq5424-rdp466.dts
> @@ -108,6 +108,12 @@ &pcie3_phy {
>  	status = "okay";
>  };
>  
> +&psci {
> +	reboot-mode {
> +		mode-edl = <0 0x1>;
> +	};
> +};
> +
>  &qusb_phy_0 {
>  	vdd-supply = <&vreg_misc_0p925>;
>  	vdda-pll-supply = <&vreg_misc_1p8>;
> diff --git a/arch/arm64/boot/dts/qcom/ipq5424.dtsi b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
> index 67877fbbdf3a0dcb587e696ed4241f1075000366..8f2ee755d2cc406374faf9e76b0d409d159a7b12 100644
> --- a/arch/arm64/boot/dts/qcom/ipq5424.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq5424.dtsi
> @@ -184,7 +184,7 @@ pmu-dsu {
>  		cpus = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>;
>  	};
>  
> -	psci {
> +	psci: psci {
>  		compatible = "arm,psci-1.0";
>  		method = "smc";
>  	};
> 
> ---
> base-commit: 8cd53fb40a304576fa86ba985f3045d5c55b0ae3
> change-id: 20250828-ipq5424-edl-8c826a2af996
> prerequisite-change-id: 20250709-arm-psci-system_reset2-vendor-reboots-46c80044afcf:v14
> prerequisite-patch-id: 38f76a48b6b824f3fa8d8cbc05ae76b43ce79556
> prerequisite-patch-id: ae7ae183210708f64fb3ff4f097de3c8af31680a
> prerequisite-patch-id: 5ba323084ac74aa744696b54ff0c17d34e26b7de
> prerequisite-patch-id: 3a2cedabc1bff24067dc224b2c077373c08b39a0
> prerequisite-patch-id: e30b97929026120277585907cde2dc000a25a621
> prerequisite-patch-id: e3ff400e6c72e835612b733b5573b01b045e7336
> prerequisite-patch-id: 50e081a2a21166aee74af428934bc3b52d3cf43b
> prerequisite-patch-id: a0148031385883a309dc165fac299d3eb5d4bcd4
> prerequisite-patch-id: 3c0f5c0e93261f6dab1d9e7293a1a28ef64e2a66
> prerequisite-patch-id: bb68380b11f9e868eacb0db9f97cc5f3ae8aa29a
> 
> Best regards,
> -- 
> Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
>