ath79: Add support for OpenMesh A40

Device specifications:
======================

* Qualcomm/Atheros QCA9558 ver 1 rev 0
* 720/600/240 MHz (CPU/DDR/AHB)
* 128 MB of RAM
* 16 MB of SPI NOR flash
  - 2x 7 MB available; but one of the 7 MB regions is the recovery image
* 2T2R 2.4 GHz Wi-Fi (11n)
* 2T2R 5 GHz Wi-Fi (11ac)
* multi-color LED (controlled via red/green/blue GPIOs)
* 1x GPIO-button (reset)
* external h/w watchdog (enabled by default))
* TTL pins are on board (arrow points to VCC, then follows: GND, TX, RX)
* 2x ethernet
  - eth0
    + Label: Ethernet 1
    + AR8035 ethernet PHY (RGMII)
    + 10/100/1000 Mbps Ethernet
    + 802.3af POE
    + used as WAN interface
  - eth1
    + Label: Ethernet 2
    + AR8035 ethernet PHY (SGMII)
    + 10/100/1000 Mbps Ethernet
    + used as LAN interface
* 1x USB
* internal antennas

Flashing instructions:
======================

Various methods can be used to install the actual image on the flash.
Two easy ones are:

ap51-flash
----------

The tool ap51-flash (https://github.com/ap51-flash/ap51-flash) should be
used to transfer the image to the u-boot when the device boots up.

initramfs from TFTP
-------------------

The serial console must be used to access the u-boot shell during bootup.
It can then be used to first boot up the initramfs image from a TFTP server
(here with the IP 192.168.1.21):

   setenv serverip 192.168.1.21
   setenv ipaddr 192.168.1.1
   tftpboot 0c00000 <filename-of-initramfs-kernel>.bin && bootm $fileaddr

The actual sysupgrade image can then be transferred (on the LAN port) to the
device via

  scp <filename-of-squashfs-sysupgrade>.bin root@192.168.1.1:/tmp/

On the device, the sysupgrade must then be started using

  sysupgrade -n /tmp/<filename-of-squashfs-sysupgrade>.bin

Signed-off-by: Sven Eckelmann <sven@narfation.org>

6 files changed, 22 insertions, 0 deletions

diff --git a/package/boot/uboot-envtools/files/ath79 b/package/boot/uboot-envtools/files/ath79
index 1fc484df52..91ba587bf8 100644
--- a/package/boot/uboot-envtools/files/ath79
+++ b/package/boot/uboot-envtools/files/ath79
@@ -48,6 +48,7 @@ netgear,wnr2200-16m|\
 netgear,wnr612-v2|\
 ocedo,koala|\
 ocedo,raccoon|\
+openmesh,a40|\
 openmesh,a60|\
 openmesh,mr600-v1|\
 openmesh,mr600-v2|\
diff --git a/target/linux/ath79/dts/qca9558_openmesh_a40.dts b/target/linux/ath79/dts/qca9558_openmesh_a40.dts
new file mode 100644
index 0000000000..d2b817031a
--- /dev/null
+++ b/target/linux/ath79/dts/qca9558_openmesh_a40.dts
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "qca9558_openmesh_a60.dtsi"
+
+/ {
+	compatible = "openmesh,a40", "qca,qca9558";
+	model = "OpenMesh A40";
+};
diff --git a/target/linux/ath79/generic/base-files/etc/board.d/02_network b/target/linux/ath79/generic/base-files/etc/board.d/02_network
index d2b55f0ba6..87aaf0bcad 100644
--- a/target/linux/ath79/generic/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/generic/base-files/etc/board.d/02_network
@@ -170,6 +170,7 @@ ath79_setup_interfaces()
 	comfast,cf-e120a-v3|\
 	comfast,cf-e314n-v2|\
 	compex,wpj531-16m|\
+	openmesh,a40|\
 	openmesh,a60|\
 	openmesh,om2p-v4|\
 	openmesh,om2p-hs-v4|\
diff --git a/target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/11-ath10k-caldata b/target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
index 1402c5529a..a7986a98ec 100644
--- a/target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
+++ b/target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/11-ath10k-caldata
@@ -98,6 +98,7 @@ case "$FIRMWARE" in
 		caldata_extract "art" 0x5000 0x844
 		ath10k_patch_mac $(mtd_get_mac_binary art 0xc)
 		;;
+	openmesh,a40|\
 	openmesh,a60|\
 	openmesh,mr1750-v1|\
 	openmesh,mr1750-v2)
diff --git a/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh b/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
index 9b6a0cf9bc..20041e4c95 100644
--- a/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
@@ -65,6 +65,7 @@ platform_do_upgrade() {
 	jjplus,ja76pf2)
 		redboot_fis_do_upgrade "$1" linux
 		;;
+	openmesh,a40|\
 	openmesh,a60|\
 	openmesh,mr600-v1|\
 	openmesh,mr600-v2|\
diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index 7c26f5dc1f..86aae57266 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -1628,6 +1628,16 @@ define Device/openmesh_common_256k
 	openmesh-image ce_type=$$$$(OPENMESH_CE_TYPE) | append-metadata
 endef
 
+define Device/openmesh_a40
+  $(Device/openmesh_common_64k)
+  SOC := qca9558
+  DEVICE_MODEL := A40
+  DEVICE_PACKAGES += kmod-ath10k-ct ath10k-firmware-qca988x-ct kmod-usb2
+  OPENMESH_CE_TYPE := A60
+  SUPPORTED_DEVICES += a40
+endef
+TARGET_DEVICES += openmesh_a40
+
 define Device/openmesh_a60
   $(Device/openmesh_common_64k)
   SOC := qca9558