Re: [PATCH net-next v1 2/3] net: dsa: microchip: lan937x: force RGMII interface into PHY mode

[Vladimir Oltean]

On Thu, Jun 27, 2024 at 02:39:10PM +0200, Oleksij Rempel wrote:
> From: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> 
> The register manual and datasheet documentation for the LAN937x series
> disagree about the polarity of the MII mode strap. As a consequence
> there are hardware designs that have the RGMII interface strapped into
> MAC mode, which is a invalid configuration and will prevent the internal
> clock from being fed into the port TX interface.
> 
> Force the MII mode to PHY for RGMII interfaces where this is the only
> valid mode, to override the inproper strapping.
> 
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
> ---

What's the difference between MAC mode and PHY mode with RGMII for this switch?