configs/asus_tinker_rk3288: fix boot by prepending tpl to spl+u-boot

During the last U-boot version bump it's not been noted that the TPL
was not prepended to SPL anymore preventing the board to boot, so
let's copy TPL to the image folder, prepend it to u-boot-spl-dtb.bin
and place it at offset 32KB, where RK3288 bootrom expects to find
it. Let's also place u-boot-dtb separated from SPL at offset 8M, where
the SPL expects it to find it.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/asus/tinker/genimage.cfg

@@ -2,12 +2,19 @@ image sdcard.img {
 	hdimage {
 	}
 
-	partition u-boot-spl-dtb {
+	partition u-boot-tpl-spl-dtb {
 		in-partition-table = "no"
-		image = "u-boot-spl-dtb.img"
+		image = "u-boot-tpl-spl-dtb.img"
 		offset = 32K
 	}
 
+	partition u-boot-dtb {
+		in-partition-table = "no"
+		image = "u-boot-dtb.img"
+		offset = 8M
+		size = 30M
+	}
+
 	partition rootfs {
 		partition-type = 0x83
 		image = "rootfs.ext4"

board/asus/tinker/post-build.sh

@@ -3,7 +3,7 @@
 MKIMAGE=$HOST_DIR/bin/mkimage
 BOARD_DIR="$(dirname $0)"
 
-$MKIMAGE -n rk3288 -T rksd -d $BINARIES_DIR/u-boot-spl-dtb.bin $BINARIES_DIR/u-boot-spl-dtb.img
-cat $BINARIES_DIR/u-boot-dtb.bin >> $BINARIES_DIR/u-boot-spl-dtb.img
+$MKIMAGE -n rk3288 -T rksd -d $BINARIES_DIR/u-boot-tpl.bin $BINARIES_DIR/u-boot-tpl.img
+cat $BINARIES_DIR/u-boot-tpl.img $BINARIES_DIR/u-boot-spl-dtb.bin > $BINARIES_DIR/u-boot-tpl-spl-dtb.img
 
 install -m 0644 -D $BOARD_DIR/extlinux.conf $TARGET_DIR/boot/extlinux/extlinux.conf

configs/asus_tinker_rk3288_defconfig

@@ -17,9 +17,8 @@ BR2_TARGET_UBOOT_NEEDS_PYTHON3=y
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
 BR2_TARGET_UBOOT_NEEDS_OPENSSL=y
 BR2_TARGET_UBOOT_FORMAT_DTB_IMG=y
-BR2_TARGET_UBOOT_FORMAT_DTB_BIN=y
 BR2_TARGET_UBOOT_SPL=y
-BR2_TARGET_UBOOT_SPL_NAME="spl/u-boot-spl-dtb.bin"
+BR2_TARGET_UBOOT_SPL_NAME="spl/u-boot-spl-dtb.bin tpl/u-boot-tpl.bin"
 
 # Kernel
 BR2_LINUX_KERNEL=y