riscv: dts: starfive: generate u-boot-spl.bin.normal.out

The StarFive VisionFive 2 board cannot load spl/u-boot-spl.bin but needs a
prefixed header. We have referring to a vendor tool (spl_tool) for this
task. 'mkimage -T sfspl' can generate the prefixed file.

Use binman to invoke mkimage for the generation of file
spl/u-boot-spl.bin.normal.out.

Update the documentation.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Tested-by: Milan P. Stanić <mps@arvanta.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/riscv/dts/jh7110-starfive-visionfive-2-u-boot.dtsi b/arch/riscv/dts/jh7110-starfive-visionfive-2-u-boot.dtsi
index 13f69da..5518531 100644
--- a/arch/riscv/dts/jh7110-starfive-visionfive-2-u-boot.dtsi
+++ b/arch/riscv/dts/jh7110-starfive-visionfive-2-u-boot.dtsi
@@ -103,4 +103,15 @@
 			};
 		};
 	};
+
+	spl-img {
+		filename = "spl/u-boot-spl.bin.normal.out";
+
+		mkimage {
+			args = "-T sfspl";
+
+			u-boot-spl {
+			};
+	};
+};
 };