ath79: add support for Ubiquiti Picostation M (XM)

This adds support for the Ubiquiti Picostation M (XM), which has the
same board/LEDs as the Bullet M XM, but different case and antennas.

Specifications:
- AR7241 SoC @ 400 MHz
- 32 MB RAM
- 8 MB SPI flash
- 1x 10/100 Mbps Ethernet, 24 Vdc PoE-in
- External antenna: 5 dBi (USA), 2 dBi (EU)
- POWER/LAN green LEDs
- 4x RSSI LEDs (red, orange, green, green)
- UART (115200 8N1) on PCB

Flashing via WebUI:
  Upload the factory image via the stock firmware web UI.

  Attention: airOS firmware versions >= 5.6 have a new bootloader with
  an incompatible partition table!

  Please downgrade to <= 5.5 _before_ flashing OpenWrt!
  Refer to the device's Wiki page for further information.

Flashing via TFTP:
  Same procedure as other NanoStation M boards.

- Use a pointy tool (e.g., pen cap, paper clip) and keep the reset
  button on the device or on the PoE supply pressed
- Power on the device via PoE (keep reset button pressed)
- Keep pressing until LEDs flash alternatively LED1+LED3 =>
  LED2+LED4 => LED1+LED3, etc.
- Release reset button
- The device starts a TFTP server at 192.168.1.20
- Set a static IP on the computer (e.g., 192.168.1.21/24)
- Upload via tftp the factory image:
  $ tftp 192.168.1.20
  tftp> bin
  tftp> trace
  tftp> put openwrt-ath79-generic-xxxxx-ubnt_picostation-m-squashfs-factory.bin

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

3 files changed, 3 insertions, 0 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 3567df662b..6668e15a74 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
@@ -248,6 +248,7 @@ ubnt,nanostation-loco-m|\
 ubnt,nanostation-loco-m-xw|\
 ubnt,nanostation-m|\
 ubnt,nanostation-m-xw|\
+ubnt,picostation-m|\
 ubnt,rocket-m)
 	ucidef_set_rssimon "wlan0" "200000" "1"
 	ucidef_set_led_rssi "rssilow" "RSSILOW" "ubnt:red:link1" "wlan0" "1" "100"
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 993632562f..4891affe17 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()
 	ubnt,nanostation-ac-loco|\
 	ubnt,nanostation-loco-m|\
 	ubnt,nanostation-loco-m-xw|\
+	ubnt,picostation-m|\
 	ubnt,rocket-m|\
 	ubnt,unifiac-lite|\
 	ubnt,unifiac-lr|\
diff --git a/target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom b/target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
index ea42478c61..96f9d5c0d2 100644
--- a/target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
+++ b/target/linux/ath79/generic/base-files/etc/hotplug.d/firmware/10-ath9k-eeprom
@@ -92,6 +92,7 @@ case "$FIRMWARE" in
 	ubnt,bullet-m|\
 	ubnt,nanostation-loco-m|\
 	ubnt,nanostation-m|\
+	ubnt,picostation-m|\
 	ubnt,rocket-m)
 		caldata_extract "art" 0x1000 0x1000
 		;;