mvebu: implement compatibility version for DSA migration

This implements the newly introduced compat-version to prevent
upgrade between swconfig and DSA for mvebu.

Just define a compat version with minor increment and an appropriate
message for both image (in Makefile) and device (in base-files).

Having taken care of sysupgrade, we can put back the SUPPORTED_DEVICES
that have been removed in previous patches to prevent broken config.

Attention:

All users that already updated to the DSA versions in master will
receive the same incompatibility warning since their devices are still
"1.0" as far as fwtool can tell.
Those, and only those, can bypass the upgrade check by using force (-F)
without having to reset config again. In addition, the new version
string needs to be put into uci config manually, so the new fwtool
knows that it actually deals with a "1.1":

   uci set "system.@system[-1].compat_version=1.1"
   uci commit system

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/mvebu/cortexa9/base-files/etc/board.d/05_compat-version

@@ -0,0 +1,25 @@
+#!/bin/sh
+#
+# Copyright (C) 2020 OpenWrt.org
+#
+
+. /lib/functions.sh
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+case "$(board_name)" in
+	linksys,wrt1200ac|\
+	linksys,wrt1900ac-v1|\
+	linksys,wrt1900ac-v2|\
+	linksys,wrt1900acs|\
+	linksys,wrt3200acm|\
+	linksys,wrt32x|\
+	solidrun,clearfog-pro-a1)
+		ucidef_set_compat_version "1.1"
+		;;
+esac
+
+board_config_flush
+
+exit 0

target/linux/mvebu/image/cortexa9.mk

@@ -6,6 +6,11 @@
 # See /LICENSE for more information.
 #
 
+define Device/dsa-migration
+  DEVICE_COMPAT_VERSION := 1.1
+  DEVICE_COMPAT_MESSAGE := Config cannot be migrated from swconfig to DSA
+endef
+
 define Device/buffalo_ls421de
   $(Device/NAND-128K)
   DEVICE_VENDOR := Buffalo
@@ -77,16 +82,19 @@ endef
 
 define Device/linksys_wrt1200ac
   $(call Device/linksys)
+  $(Device/dsa-migration)
   DEVICE_MODEL := WRT1200AC
   DEVICE_ALT0_VENDOR := Linksys
   DEVICE_ALT0_MODEL := Caiman
   DEVICE_DTS := armada-385-linksys-caiman
   DEVICE_PACKAGES += mwlwifi-firmware-88w8864
+  SUPPORTED_DEVICES += armada-385-linksys-caiman linksys,caiman
 endef
 TARGET_DEVICES += linksys_wrt1200ac
 
 define Device/linksys_wrt1900acs
   $(call Device/linksys)
+  $(Device/dsa-migration)
   DEVICE_MODEL := WRT1900ACS
   DEVICE_VARIANT := v1
   DEVICE_ALT0_VENDOR := Linksys
@@ -96,11 +104,13 @@ define Device/linksys_wrt1900acs
   DEVICE_ALT1_MODEL := Shelby
   DEVICE_DTS := armada-385-linksys-shelby
   DEVICE_PACKAGES += mwlwifi-firmware-88w8864
+  SUPPORTED_DEVICES += armada-385-linksys-shelby linksys,shelby
 endef
 TARGET_DEVICES += linksys_wrt1900acs
 
 define Device/linksys_wrt1900ac-v1
   $(call Device/linksys)
+  $(Device/dsa-migration)
   DEVICE_MODEL := WRT1900AC
   DEVICE_VARIANT := v1
   DEVICE_ALT0_VENDOR := Linksys
@@ -108,33 +118,39 @@ define Device/linksys_wrt1900ac-v1
   DEVICE_DTS := armada-xp-linksys-mamba
   DEVICE_PACKAGES += mwlwifi-firmware-88w8864
   KERNEL_SIZE := 3072k
+  SUPPORTED_DEVICES += armada-xp-linksys-mamba linksys,mamba
   DEFAULT := n
 endef
 TARGET_DEVICES += linksys_wrt1900ac-v1
 
 define Device/linksys_wrt1900ac-v2
   $(call Device/linksys)
+  $(Device/dsa-migration)
   DEVICE_MODEL := WRT1900AC
   DEVICE_VARIANT := v2
   DEVICE_ALT0_VENDOR := Linksys
   DEVICE_ALT0_MODEL := Cobra
   DEVICE_DTS := armada-385-linksys-cobra
   DEVICE_PACKAGES += mwlwifi-firmware-88w8864
+  SUPPORTED_DEVICES += armada-385-linksys-cobra linksys,cobra
 endef
 TARGET_DEVICES += linksys_wrt1900ac-v2
 
 define Device/linksys_wrt3200acm
   $(call Device/linksys)
+  $(Device/dsa-migration)
   DEVICE_MODEL := WRT3200ACM
   DEVICE_ALT0_VENDOR := Linksys
   DEVICE_ALT0_MODEL := Rango
   DEVICE_DTS := armada-385-linksys-rango
   DEVICE_PACKAGES += kmod-btmrvl kmod-mwifiex-sdio mwlwifi-firmware-88w8964
+  SUPPORTED_DEVICES += armada-385-linksys-rango linksys,rango
 endef
 TARGET_DEVICES += linksys_wrt3200acm
 
 define Device/linksys_wrt32x
   $(call Device/linksys)
+  $(Device/dsa-migration)
   DEVICE_MODEL := WRT32X
   DEVICE_ALT0_VENDOR := Linksys
   DEVICE_ALT0_MODEL := Venom
@@ -142,6 +158,7 @@ define Device/linksys_wrt32x
   DEVICE_PACKAGES += kmod-btmrvl kmod-mwifiex-sdio mwlwifi-firmware-88w8964
   KERNEL_SIZE := 3072k
   KERNEL := kernel-bin | append-dtb
+  SUPPORTED_DEVICES += armada-385-linksys-venom linksys,venom
   DEFAULT := n
 endef
 TARGET_DEVICES += linksys_wrt32x
@@ -234,6 +251,7 @@ endef
 TARGET_DEVICES += solidrun_clearfog-base-a1
 
 define Device/solidrun_clearfog-pro-a1
+  $(Device/dsa-migration)
   DEVICE_VENDOR := SolidRun
   DEVICE_MODEL := ClearFog Pro
   KERNEL_INSTALL := 1
@@ -244,5 +262,6 @@ define Device/solidrun_clearfog-pro-a1
   DEVICE_DTS := armada-388-clearfog-pro armada-388-clearfog-base
   UBOOT := clearfog-u-boot-spl.kwb
   BOOT_SCRIPT := clearfog
+  SUPPORTED_DEVICES += armada-388-clearfog armada-388-clearfog-pro
 endef
 TARGET_DEVICES += solidrun_clearfog-pro-a1