Re: [PATCH net-next 0/5] net: ethernet: adi: adin1110: Add OPEN Alliance TC6 support

[Stolniceanu, Iustin]

On Tue, Nov 03, 2026 at 20:49 UTC, Andrew Lunn wrote:
> On Tue, Nov 03, 2026 at 06:09:13PM +0200, Iustin Stolniceanu wrote:
> > The ADIN1110 supports two SPI host interface protocols: the generic SPI
> > protocol, which the adin1110 driver implements today, and the OPEN
> > Alliance TC6 protocol. The protocol is selected by the SPI_CFG1 pin,
> > which the device latches when it comes out of reset.
>
> Is it possible to read the status of this pin from a register?

No, not for SPI_CFG1. The ADIN1110 has no register that reports the 
SPI_CFG1 level or the selected host protocol.

The only way to detect the mode at runtime would be to probe it:
read the PHYID register using one framing and fall back to the
other if the value does not match. I have not tried that yet, and I
am not sure that clocking a transaction in the wrong framing is
harmless for the device, so I went with a DT property describing how
the board straps the pin.

If you would prefer autodetection, I can try it on hardware for V2.

Thanks,
Iustin