Re: [RFC v1 12/14] arm64: dts: mediatek: mt7988: add reserved memory

[AngeloGioacchino Del Regno]

Il 29/10/24 11:39, Frank Wunderlich ha scritto:
> From: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>
>
> Add memory range handled by ATF to not be touched by linux kernel.
>
> Signed-off-by: Frank Wunderlich <frank-w@xxxxxxxxxxxxxxx>

If you are really sure that this is always the same for all boards based on MT7988,
I will trust you and give you my R-b once this series gets out of RFC state.

Cheers,
Angelo

> ---
>   arch/arm64/boot/dts/mediatek/mt7988a.dtsi | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
> index a3a7deda35a5..7721d2ec06ee 100644
> --- a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
> @@ -81,6 +81,18 @@ reg_3p3v: regulator-3p3v {
>   		regulator-always-on;
>   	};
>   
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		/* 320 KiB reserved for ARM Trusted Firmware (BL31 and BL32) */
> +		secmon_reserved: secmon@43000000 {
> +			reg = <0 0x43000000 0 0x50000>;
> +			no-map;
> +		};
> +	};
> +
>   	soc {
>   		compatible = "simple-bus";
>   		ranges;