[RFC] imx8mm-evk: Generate a bootable flash.bin again

[Fabio Estevam]

After the convesion to binman in commit 8996e6b7c6a1 ("imx8mm_evk: switch
to use binman to pack images"), it is necessary to flash both flash.bin and
u-boot.itb to get a bootable system. Prior to this commit, only flash.bin
was needed.

Such new requirement breaks existing distro mechanisms to generate the
final image because the extra u-boot.itb is now required.

Generate a final flash.bin image that can be used again as a single
bootable image to keep the original behavior.

Suggested-by: Heiko Schocher <hs at denx.de>
Signed-off-by: Fabio Estevam <festevam at denx.de>
---
 arch/arm/dts/imx8mm-evk-u-boot.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm/dts/imx8mm-evk-u-boot.dtsi b/arch/arm/dts/imx8mm-evk-u-boot.dtsi
index f200afac9f..ad3056c7c8 100644
--- a/arch/arm/dts/imx8mm-evk-u-boot.dtsi
+++ b/arch/arm/dts/imx8mm-evk-u-boot.dtsi
@@ -217,4 +217,19 @@
 			};
 		};
 	};
+
+	imx-boot {
+		filename = "flash.bin";
+		pad-byte = <0x00>;
+
+		spl: blob-ext at 1 {
+			offset = <0x0>;
+			filename = "flash.bin";
+		};
+
+		uboot: blob-ext at 2 {
+			offset = <0x57c00>;
+			filename = "u-boot.itb";
+		};
+	};
 };
-- 
2.25.1