arm64: dts: marvell: Add Sophos XGS 107w NPU board

Add a device tree for the network processing unit (NPU) of the Sophos
XGS 87/107 desktop firewalls. The appliance pairs an AMD x86 host with the
NPU, a Marvell Armada CN9130 SoC with its own eMMC and SPI NOR flash that
runs independently of the host and serves the front panel ports.

The eight RJ45 ports and the SFP cage are connected through a Marvell
88E6193X switch on the MDIO bus of the SoC, at address 2. Switch port 0
is the CPU port, a 10GBASE-R link to the first mvpp2 port. Ports 1 to 8
are the RJ45 ports, which use the internal PHYs of the switch, and
port 9 is the SFP cage, connected over 1000BASE-X.

Describe the UART console, the eMMC, the SPI NOR flash that holds the boot
loader and its environment (read-only), the SFP cage and the switch with
its ports. The port LEDs, the PCIe link to the x86 host and the USB ports
are not described.

The switch is reset through CP GPIO2 pin 17.

Tested on an XGS 107w with Linux 6.18: boot from eMMC, eMMC and SPI NOR
access, the mvpp2 link to the switch at 10 Gb/s, the 88E6193X probing with
its eight user ports, and 936 Mbit/s through a front port. The SFP cage is
untested.

Assisted-by: LLM
Signed-off-by: Nicolo Giuliani <nicolo.giuliani6@studio.unibo.it>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

0 files changed, 0 insertions, 0 deletions