Re: [PATCH 3/3] arm64: dts: marvell: Add Sophos XGS 107w NPU board
flat view
From: Andrew Lunn <andrew@lunn.ch>
Date: 2026-09-19 22:23:24
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The reset line of the switch (CP GPIO2 pin 17) is deliberately not given to the mv88e6xxx driver as reset-gpios. The 88E6193X needs about two seconds after a reset before it can be used, much longer than the driver waits, so the probe would time out.
The obvious question is, why is your 88E6193X special? I've seen issues when there is an EEPROM attached and it has a lot of content to setup the switch. But that goes against using DSA, where you want Linux to control the switch, not a fixed configuration.
quoted hunk ↗ jump to hunk
+&cp0_i2c0 { + clock-frequency = <100000>; + status = "okay"; + + /* Drives the port speed LEDs, which are not described yet */ + gpio@20 {
Which port?
+&cp0_i2c1 {
+ /* SFP EEPROM (0x50/0x51) */The addresses are not that simple. When a copper module is inserted, other addresses are used. The SFP driver assumes it has access to all addresses on the bus. Andrew