linux-kernel - Re: [PATCH 5/5] ARM: dts: qcom: apq8026-samsung-matisse-wifi: Add reboot-mode node

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Message-ID: <3cfacc54-6cc5-1a11-d7db-96409097f290@linaro.org>
Date:   Sat, 20 May 2023 01:27:04 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Matti Lehtimäki <matti.lehtimaki@...il.com>,
        linux-arm-msm@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] ARM: dts: qcom: apq8026-samsung-matisse-wifi: Add
 reboot-mode node



On 19.05.2023 23:09, Matti Lehtimäki wrote:
> This enables userspace to signal the bootloader to go into the
> bootloader or recovery mode.
> 
> The magic values can be found in both the downstream kernel and the LK
> kernel (bootloader).
> 
> Signed-off-by: Matti Lehtimäki <matti.lehtimaki@...il.com>
> ---
>  .../arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts b/arch/arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts
> index 91b860e24681..a05c41191efd 100644
> --- a/arch/arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts
> +++ b/arch/arm/boot/dts/qcom-apq8026-samsung-matisse-wifi.dts
> @@ -279,6 +279,16 @@ touchscreen@4a {
>  	};
>  };
>  
> +&imem {
> +	status = "okay";
Drop, undisable in dtsi

> +
> +	reboot-mode {
You can add a label like imem_reboot_mode and refer to just this
thing from the device dt. Though I'm fairly sure the modes should
be common.

Konrad
> +		mode-bootloader = <0x77665500>;
> +		mode-normal     = <0x77665501>;
> +		mode-recovery   = <0x77665502>;
> +	};
> +};
> +
>  &rpm_requests {
>  	regulators {
>  		compatible = "qcom,rpm-pm8226-regulators";