linux-kernel - Re: [PATCH v5] arm64: dts: mt8173-elm: Switch to SMC watchdog

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Message-ID: <8b9e509c-2ff8-7948-17a8-54c2d98713cb@gmail.com>
Date:   Wed, 1 Feb 2023 14:17:41 +0100
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Pin-yen Lin <treapking@...omium.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Evan Benn <evanbenn@...omium.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Eizan Miyamoto <eizan@...omium.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v5] arm64: dts: mt8173-elm: Switch to SMC watchdog



On 29/07/2022 07:32, Pin-yen Lin wrote:
> Switch to SMC watchdog because we need direct control of HW watchdog
> registers from kernel. The corresponding firmware was uploaded in
> https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3405.
> 
> Signed-off-by: Pin-yen Lin <treapking@...omium.org>

Applied, sorry for the delay!

Matthias

> ---
> 
> Changes in v5:
> - Remove redundant new line.
> 
> Changes in v4:
> - Rename the watchdog node (smc_watchdog -> watchdog)
> - Correct the patch summary (mt8173-oak -> mt8173-elm)
> 
> Changes in v3:
> - Remove /delete-node/ and create a new node for SMC watchdog.
> 
> Changes in v2:
> - Move the modifications to mt8173-elm.dtsi and add some comments.
> 
>   arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> index e21feb85d822..abe3140cfcc6 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> @@ -161,6 +161,18 @@ hdmi_connector_in: endpoint {
>   			};
>   		};
>   	};
> +
> +	watchdog {
> +		compatible = "arm,smc-wdt";
> +	};
> +};
> +
> +/*
> + * Disable the original MMIO watch dog and switch to the SMC watchdog, which
> + * operates on the same MMIO.
> + */
> +&watchdog {
> +	status = "disabled";
>   };
>   
>   &mfg_async {