ath79: add support for MikroTik RouterBOARD 750 r2 (hEX lite)
This patch adds support for the MikroTik RouterBOARD 750 r2, marketed as
hEX lite, a small indoor router with 5x 10/100 Mbps Ethernet ports, one
with PoE in. The device was already supported by the ar71xx target.
Specifications:
- SoC: Qualcomm Atheros QCA9533
- Flash: 16 MB SPI NOR
- RAM: 64 MB
- Ethernet: 4x 10/100 Mbps LAN, 1x 10/100 Mbps WAN (PoE in)
- LEDs: 5x Ethernet port activity (green), 1x user (green)
- Buttons: 1x reset
See https://mikrotik.com/product/RB750r2 for more details.
Not working:
- Serial port (already not working in ar71xx)
Flashing:
TFTP boot initramfs image and then perform sysupgrade. Only the
"Internet" port will ask for an initramfs image. Follow common
MikroTik procedure as in https://openwrt.org/toh/mikrotik/common.
Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>