[openwrt/openwrt] ramips: add support for Zyxel NWA90AX access point

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/41934223776dc45e410ac372c6713e6a2713ff33

commit 41934223776dc45e410ac372c6713e6a2713ff33
Author: Christian Weiske <cweiske at cweiske.de>
AuthorDate: Sun Oct 5 13:41:34 2025 +0200

    ramips: add support for Zyxel NWA90AX access point
    
    The NWA90AX is hardware-wise identical to the NWA50AX which is
    already supported.
    
    The NWA90AX magic model code bytes are `77 E1`,
    and they are added to the DTS to mark the NWA50AX firmware
    as being compatible with the 90 model.
    
    Without the compat-models change, uploading the OpenWrt NWA50AX
    firmware with the official Zyxel web interface yields an error:
    > errno: -25007
    > errmsg: Firmware content error!
    
    As described on the NWA50AX firmware page[1] on the wiki, the
    "current image" slot for firmware updates has to be "1".
    If it is 0, flashing will fail.
    
    [1] https://openwrt.org/toh/zyxel/nwa50ax
    
    Vendor product page:
    https://www.zyxel.com/global/en/products/wireless/ax1800-4-stream-wifi-6-dual-radio-nebulaflex-access-point-nwa90ax
    
    Vendor support page stating that the hardware is identical:
    https://support.zyxel.eu/hc/en-us/articles/4416989548178-Access-Point-NWA50-55AXEE-90AX-110AX-210AX-Differences-in-Hardware-and-Features
    > NWA90AX: Identical hardware as in NWA50AX, but with added features
    > like Captive portal for Guest access and WPA Enterprise for
    > AD/Radius (Credential) authentication.
    
    Signed-off-by: Christian Weiske <cweiske at cweiske.de>
    Link: https://github.com/openwrt/openwrt/pull/20308
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/ramips/image/mt7621.mk | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index ffe59bdab2..532aad4b7b 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -228,8 +228,9 @@ define Build/zytrx-header
 endef
 
 define Build/zyxel-nwa-fit
+	# "77 e1" is NWA90AX
 	$(TOPDIR)/scripts/mkits-zyxel-fit.sh \
-		$@.its $@ "6b e1 6f e1 ff ff ff ff ff ff"
+		$@.its $@ "6b e1 6f e1 77 e1 ff ff ff ff"
 	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $@.its $@.new
 	@mv $@.new $@
 endef
@@ -3717,6 +3718,8 @@ endef
 define Device/zyxel_nwa50ax
   $(Device/zyxel_nwa-ax)
   DEVICE_MODEL := NWA50AX
+  DEVICE_ALT0_VENDOR := Zyxel
+  DEVICE_ALT0_MODEL := NWA90AX
 endef
 TARGET_DEVICES += zyxel_nwa50ax