radxa-zero3: add edge branch (6.9.y) by picking DT from linux-rockc…

…hip#for-next & using Kwiboo's 24.07 u-boot

- u-boot:
   - unset `BOOT_FDT_FILE` for edge branch; that lets Armbian bootscript use the fdtfile auto-detected and set by u-boot
   - unset `BOOTFS_TYPE`, since mainline u-boot can boot ext4 directly
- kernel DTs from https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git/tree/arch/arm64/boot/dts/rockchip?h=84a3d3b435e7c109d2141c5bbb9eaab146c94df0

Co-authored-by: Jonas Karlman <[email protected]>
Co-authored-by: Ricardo Pardini <[email protected]> (null-patch to bare-dt)

config/boards/radxa-zero3.conf

@@ -3,13 +3,18 @@ BOARD_NAME="Radxa ZERO 3"
 BOARDFAMILY="rk35xx"
 BOARD_MAINTAINER="Radxa"
 BOOTCONFIG="radxa-zero3-rk3566_defconfig"
-KERNEL_TARGET="legacy,vendor"
+KERNEL_TARGET="legacy,vendor,edge"
 FULL_DESKTOP="yes"
 BOOT_LOGO="desktop"
 BOOT_FDT_FILE="rockchip/rk3566-radxa-zero3.dtb"
 IMAGE_PARTITION_TABLE="gpt"
 BOOT_SCENARIO="spl-blobs"
-BOOTFS_TYPE="fat"
+BOOTFS_TYPE="fat" # Only for vendor/legacy
+
+function post_family_config_branch_edge__use_mainline_dtb_name() {
+	unset BOOT_FDT_FILE # boot.scr will use whatever u-boot detects and sets 'fdtfile' to
+	unset BOOTFS_TYPE   # mainline u-boot can boot ext4 directly
+}
 
 # Override family config for this board; let's avoid conditionals in family config.
 function post_family_config__radxa-zero3_use_vendor_uboot() {
@@ -25,3 +30,18 @@ function post_family_config__radxa-zero3_use_vendor_uboot() {
 		dd if=$1/u-boot-rockchip.bin of=$2 seek=64 conv=notrunc status=none
 	}
 }
+
+function post_family_config_branch_edge__radxa-zero3_use_kwiboo_uboot() {
+	BOOTCONFIG="radxa-zero-3-rk3566_defconfig"
+	BOOTSOURCE='https://github.com/Kwiboo/u-boot-rockchip.git'
+	BOOTBRANCH='branch:rk3xxx-2024.07'
+	BOOTPATCHDIR="u-boot-zero3" # Empty
+
+	UBOOT_TARGET_MAP="BL31=$RKBIN_DIR/$BL31_BLOB ROCKCHIP_TPL=$RKBIN_DIR/$DDR_BLOB;;u-boot-rockchip.bin"
+
+	unset uboot_custom_postprocess write_uboot_platform write_uboot_platform_mtd
+
+	function write_uboot_platform() {
+		dd if=$1/u-boot-rockchip.bin of=$2 seek=64 conv=notrunc status=none
+	}
+}