[PATCH v2 19/35] rockchip: Add a template for SPL

[Jonas Karlman]

Hi Simon,

On 2025-02-09 22:14, Simon Glass wrote:
> The SPL phase has a single SPL binary plus a devicetree for each board
> we need to support.
> 
> The devicetree is run through fdtgrep to remove unwanted nodes and
> properties and reduce its size.
> 
> While it would be nicer to just have a single FIT holding both the SPL
> and U-Boot images, there may not be enough SRAM to support that. So we
> end up providing this special image just for SPL.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> 
> (no changes since v1)
> 
>  arch/arm/dts/rockchip-u-boot.dtsi | 43 +++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
> 
> diff --git a/arch/arm/dts/rockchip-u-boot.dtsi b/arch/arm/dts/rockchip-u-boot.dtsi
> index c2a795957fb..9525cb9c21a 100644
> --- a/arch/arm/dts/rockchip-u-boot.dtsi
> +++ b/arch/arm/dts/rockchip-u-boot.dtsi
> @@ -153,6 +153,49 @@
>  			};
>  		};
>  	};
> +
> +	spl_template: template-2 {
> +		type = "fit";
> +		description = "FIT image for U-Boot SPL";
> +		#address-cells = <1>;
> +		fit,fdt-list = "of-list";
> +		fit,align = <512>;
> +		fit,external-offset = <0>;
> +		images {
> +			spl {
> +				description = "U-Boot SPL";
> +				type = "firmware";
> +				os = "u-boot";
> +				arch = ARCH;
> +				compression = "lz4";
> +				load = <CONFIG_SPL_TEXT_BASE>;
> +				entry = <CONFIG_SPL_TEXT_BASE>;
> +				section {
> +					compress = "lz4";
> +					u-boot-spl-nodtb {
> +					};
> +					u-boot-spl-bss-pad {
> +					};
> +				};
> +			};
> +			@fdt-SEQ {
> +				description = "fdt-NAME";
> +				compression = "none";
> +				type = "flat_dt";
> +				fit,fdt-phase = "spl";
> +			};
> +		};
> +		configurations {
> +			default = "@config-DEFAULT-SEQ";
> +			@config-SEQ {
> +				description = "NAME.dtb";
> +				fdt = "fdt-SEQ";
> +				fit,firmware = "spl";
> +				fit,loadables;
> +				fit,compatible;
> +			};
> +		};
> +	};

This template look very specific to VBE/VPL and can probably also be
moved to rockchip-vpl-u-boot.dtsi. Else this could need a comment on
e.g. why this does not use COMP as compression algo.

Regards,
Jonas

>  #endif /* HAS_FIT */
>  
>  	simple-bin {