linux-kernel - Re: [PATCH v17 09/12] arm64: dts: qcom: qcs6490-rb3gen2: Add PSCI SYSTEM

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Message-ID: <20251110122824.5je5jfoanivl6xrh@hu-mojha-hyd.qualcomm.com>
Date: Mon, 10 Nov 2025 17:58:24 +0530
From: Mukesh Ojha <mukesh.ojha@....qualcomm.com>
To: Shivendra Pratap <shivendra.pratap@....qualcomm.com>
Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        Souvik Chakravarty <Souvik.Chakravarty@....com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>, Andy Yan <andy.yan@...k-chips.com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Konrad Dybcio <konradybcio@...nel.org>,
        cros-qcom-dts-watchers@...omium.org, Vinod Koul <vkoul@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Moritz Fischer <moritz.fischer@...us.com>,
        John Stultz <john.stultz@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Stephen Boyd <swboyd@...omium.org>,
        Andre Draszik <andre.draszik@...aro.org>,
        Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org,
        Elliot Berman <quic_eberman@...cinc.com>,
        Xin Liu <xin.liu@....qualcomm.com>,
        Srinivas Kandagatla <srini@...nel.org>,
        Elliot Berman <elliot.berman@....qualcomm.com>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v17 09/12] arm64: dts: qcom: qcs6490-rb3gen2: Add PSCI
 SYSTEM_RESET2 types

On Sun, Nov 09, 2025 at 08:07:22PM +0530, Shivendra Pratap wrote:
> From: Elliot Berman <elliot.berman@....qualcomm.com>
> 
> Add support for SYSTEM_RESET2 vendor-specific resets in
> qcs6490-rb3gen2 as reboot-modes.  Describe the resets:
> "bootloader" will cause device to reboot and stop in the
> bootloader's fastboot mode. "edl" will cause device to reboot
> into "emergency download mode", which permits loading images via
> the Firehose protocol.
> 
> Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
> Signed-off-by: Elliot Berman <elliot.berman@....qualcomm.com>
> Signed-off-by: Shivendra Pratap <shivendra.pratap@....qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> index 721a26d49ccaeb1429e2cc1c3a5c8d9517da3be6..cebdedd5d614b9efb6dfbee91dd67f3c3e322a38 100644
> --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> @@ -935,6 +935,13 @@ &pon_resin {
>  	status = "okay";
>  };
>  
> +&psci {
> +	reboot-mode {
> +		mode-bootloader = <0x10001 0x2>;
> +		mode-edl = <0 0x1>;
> +	};
> +};
> +

Make sense for this as it leverages sc7280 and adding it there would not
have made sense.

Acked-by: Mukesh Ojha <mukesh.ojha@....qualcomm.com>

>  &qup_uart7_cts {
>  	/*
>  	 * Configure a bias-bus-hold on CTS to lower power
> 
> -- 
> 2.34.1
> 

-- 
-Mukesh Ojha