radxa-nio-12l: u-boot: fix u-boot env conflict; include userspace tooling

- u-boot stores env in UFS LUN 1
- use a 2mb offset (different from vendor/Collabora's) to avoid any env conflict
- point fw_printenv/setenv at it at the correct offset and size

Author: rpardini

config/boards/radxa-nio-12l.conf

@@ -13,3 +13,26 @@ declare -g BOOTCONFIG="genio_1200_radxa_nio_12l_d8_defconfig" # d4/d8/d16 are ir
 declare -g BOOT_SOC="mt8395"                                  # the NIO-12L is a MT8395, but everything is named mt8195 in OPTEE/TF-A/Libbase/etc.
 declare -g MEDIATEK_GENIO_SOC_PLATFORM="mt8195"               # The actual PLAT= for TF-A, libbase, etc.
 # blobs live at https://github.com/armbian/mtkbin/tree/main/radxa-nio-12l
+
+# Important: we change u-boot's env offset to half-way through the UFS LUN, so we don't conflict or inherit env from
+#            vendor or Collabora version of u-boot, in case the user had ran `saveenv` previously. It would conflict
+#            with Armbian's version ("env default -f -a" to clean), which boots OS from SD cards first, Eth last, etc.
+function post_config_uboot_target__nio_12l_armbian_specific_environment_location() {
+	display_alert "u-boot for ${BOARD}/${BRANCH}" "u-boot: board-specific configs" "info"
+	run_host_command_logged scripts/config --set-val CONFIG_ENV_OFFSET "0x200000"
+}
+
+# Include fw_setenv, configured to point to the correct spot on the UFS LUN number
+declare -g PACKAGE_LIST_BOARD="libubootenv-tool" # libubootenv-tool provides fw_printenv and fw_setenv, for talking to U-Boot environment
+function post_family_tweaks__config_radxa_nio_12l_fwenv() {
+	display_alert "Configuring fw_printenv and fw_setenv" "for ${BOARD}" "info"
+	# Addresses below come from CONFIG_ENV_OFFSET and CONFIG_ENV_SIZE in defconfig
+	cat <<- 'FW_ENV_CONFIG' > "${SDCARD}"/etc/fw_env.config
+		# UFS LUN 2 (scsi 1 in u-boot) u-boot env for the ${BOARD_NAME}
+		# The correct way to access the device would be /dev/disk/by-path/platform-11270000.ufshci-scsi-0:0:0:1
+		#   but unfortunately libubootenv-tool can't handle the colons in that path; so use /dev/sdb instead
+		# ATTENTION: Offset is set to 0x200000 to avoid conflict with Collabora/vendor build u-boot env area
+		# Device name    Device offset Env. size Flash sector size Number of sectors
+		/dev/sdb         0x200000      0x2000
+	FW_ENV_CONFIG
+}