radxa-nio-12l: include u-boot userspace to manipulate u-boot env from Linux

- u-boot stores env in UFS LUN 1
- point fw_printenv/setenv at it at the correct offset and size

Author: rpardini

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

@@ -13,3 +13,17 @@ 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
+
+# Include fw_setenv, configured to point to the correct spot on the UFS LUN number 1 (0 is bootloader, 1 is env, 2 is rootfs)
+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
+		# Device name    Device offset Env. size Flash sector size Number of sectors
+		/dev/sdb         0x0           0x2000
+	FW_ENV_CONFIG
+}