Re: [PATCH net-next 10/10] arm64: dts: mt7986: move dlm in a dedicated node

[Matthias Brugger <matthias.bgg@xxxxxxxxx>]

On 20/03/2023 17:58, Lorenzo Bianconi wrote:
> Since the dlm memory region is not part of the RAM SoC, move dlm in a
> deidicated syscon node.
> This patch helps to keep backward-compatibility with older version of
> uboot codebase where we have a limit of 8 reserved-memory dts child
> nodes.
>
> Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>

Acked-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>

> ---
>   arch/arm64/boot/dts/mediatek/mt7986a.dtsi | 30 ++++++++++++-----------
>   1 file changed, 16 insertions(+), 14 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
> index a0d96d232ee5..0ae6aa59d3c6 100644
> --- a/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt7986a.dtsi
> @@ -93,16 +93,6 @@ wo_data: wo-data@4fd80000 {
>   			reg = <0 0x4fd80000 0 0x240000>;
>   			no-map;
>   		};
> -
> -		wo_dlm0: wo-dlm@151e8000 {
> -			reg = <0 0x151e8000 0 0x2000>;
> -			no-map;
> -		};
> -
> -		wo_dlm1: wo-dlm@151f8000 {
> -			reg = <0 0x151f8000 0 0x2000>;
> -			no-map;
> -		};
>   	};
>   
>   	timer {
> @@ -444,10 +434,11 @@ wed0: wed@15010000 {
>   			reg = <0 0x15010000 0 0x1000>;
>   			interrupt-parent = <&gic>;
>   			interrupts = <GIC_SPI 205 IRQ_TYPE_LEVEL_HIGH>;
> -			memory-region = <&wo_emi0>, <&wo_dlm0>, <&wo_data>;
> -			memory-region-names = "wo-emi", "wo-dlm", "wo-data";
> +			memory-region = <&wo_emi0>, <&wo_data>;
> +			memory-region-names = "wo-emi", "wo-data";
>   			mediatek,wo-ccif = <&wo_ccif0>;
>   			mediatek,wo-ilm = <&wo_ilm0>;
> +			mediatek,wo-dlm = <&wo_dlm0>;
>   			mediatek,wo-cpuboot = <&wo_cpuboot>;
>   		};
>   
> @@ -457,10 +448,11 @@ wed1: wed@15011000 {
>   			reg = <0 0x15011000 0 0x1000>;
>   			interrupt-parent = <&gic>;
>   			interrupts = <GIC_SPI 206 IRQ_TYPE_LEVEL_HIGH>;
> -			memory-region = <&wo_emi1>, <&wo_dlm1>, <&wo_data>;
> -			memory-region-names = "wo-emi", "wo-dlm", "wo-data";
> +			memory-region = <&wo_emi1>, <&wo_data>;
> +			memory-region-names = "wo-emi", "wo-data";
>   			mediatek,wo-ccif = <&wo_ccif1>;
>   			mediatek,wo-ilm = <&wo_ilm1>;
> +			mediatek,wo-dlm = <&wo_dlm1>;
>   			mediatek,wo-cpuboot = <&wo_cpuboot>;
>   		};
>   
> @@ -488,6 +480,16 @@ wo_ilm1: syscon@151f0000 {
>   			reg = <0 0x151f0000 0 0x8000>;
>   		};
>   
> +		wo_dlm0: syscon@151e8000 {
> +			compatible = "mediatek,mt7986-wo-dlm", "syscon";
> +			reg = <0 0x151e8000 0 0x2000>;
> +		};
> +
> +		wo_dlm1: syscon@151f8000 {
> +			compatible = "mediatek,mt7986-wo-dlm", "syscon";
> +			reg = <0 0x151f8000 0 0x2000>;
> +		};
> +
>   		wo_cpuboot: syscon@15194000 {
>   			compatible = "mediatek,mt7986-wo-cpuboot", "syscon";
>   			reg = <0 0x15194000 0 0x1000>;