ath79: Add support for OpenMesh MR900 v2

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
* 3T3R 2.4 GHz Wi-Fi
* 3T3R 5 GHz Wi-Fi
* 6x GPIO-LEDs (2x wifi, 2x status, 1x lan, 1x power)
* 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)
* 1x ethernet
  - AR8035 ethernet PHY (RGMII)
  - 10/100/1000 Mbps Ethernet
  - 802.3af POE
  - used as LAN interface
* 12-24V 1A DC
* 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>
[rebase, add LED migration]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

4 files changed, 6 insertions, 2 deletions

diff --git a/target/linux/ath79/generic/base-files/etc/board.d/01_leds b/target/linux/ath79/generic/base-files/etc/board.d/01_leds
index 034c2d2933..8fba9bc0e7 100755
--- a/target/linux/ath79/generic/base-files/etc/board.d/01_leds
+++ b/target/linux/ath79/generic/base-files/etc/board.d/01_leds
@@ -158,7 +158,8 @@ telco,t1)
 comfast,cf-wr752ac-v1|\
 engenius,eap300-v2|\
 enterasys,ws-ap3705i|\
-openmesh,mr900-v1)
+openmesh,mr900-v1|\
+openmesh,mr900-v2)
 	ucidef_set_led_netdev "lan" "LAN" "blue:lan" "eth0"
 	;;
 compex,wpj344-16m|\
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 8a15d2ad55..76bbd92c21 100755
--- a/target/linux/ath79/generic/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/generic/base-files/etc/board.d/02_network
@@ -49,6 +49,7 @@ ath79_setup_interfaces()
 	openmesh,mr600-v1|\
 	openmesh,mr600-v2|\
 	openmesh,mr900-v1|\
+	openmesh,mr900-v2|\
 	pcs,cap324|\
 	pisen,ts-d084|\
 	pisen,wmb001n|\
diff --git a/target/linux/ath79/generic/base-files/etc/uci-defaults/04_led_migration b/target/linux/ath79/generic/base-files/etc/uci-defaults/04_led_migration
index ad14eb2941..453bf3b911 100644
--- a/target/linux/ath79/generic/base-files/etc/uci-defaults/04_led_migration
+++ b/target/linux/ath79/generic/base-files/etc/uci-defaults/04_led_migration
@@ -23,7 +23,8 @@ openmesh,mr600-v1)
 openmesh,mr600-v2)
 	migrate_leds ":wlan24=:wifi2g" ":wlan58=:wifi5g"
 	;;
-openmesh,mr900-v1)
+openmesh,mr900-v1|\
+openmesh,mr900-v2)
 	migrate_leds ":wlan24=:wifi2g" ":wlan58=:wifi5g" ":wan=:lan"
 	;;
 pcs,cap324)
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 40197cfaa8..76512758b6 100644
--- a/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ath79/generic/base-files/lib/upgrade/platform.sh
@@ -53,6 +53,7 @@ platform_do_upgrade() {
 	openmesh,mr600-v1|\
 	openmesh,mr600-v2|\
 	openmesh,mr900-v1|\
+	openmesh,mr900-v2|\
 	openmesh,om2p-v2|\
 	openmesh,om2p-v4|\
 	openmesh,om2p-hs-v1|\