Re: [PATCH v4] arm64: dts: mt8173-elm: Switch to SMC watchdog

[AngeloGioacchino Del Regno]

Il 29/07/22 05:24, Pin-yen Lin ha scritto:
> 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@xxxxxxxxxxxx>
> ---
>
> 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 | 13 +++++++++++++
>   1 file changed, 13 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> index e21feb85d822..421bb2945135 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173-elm.dtsi
> @@ -161,6 +161,19 @@ hdmi_connector_in: endpoint {
>   			};
>   		};
>   	};
> +
> +

You don't need two blank lines, just one is enough (please fix).

After which:

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>

> +	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 {