[PATCH 07/14] net: axienet: Fix SGMII support

Andrew Lunn andrew at lunn.ch
Fri Jan 10 06:04:15 PST 2020


On Fri, Jan 10, 2020 at 11:54:08AM +0000, Andre Przywara wrote:
> With SGMII, the MAC and the PHY can negotiate the link speed between
> themselves, without the host needing to mediate between them.
> Linux recognises this, and will call phylink's mac_config with the speed
> member set to SPEED_UNKNOWN (-1).
> Currently the axienet driver will bail out and complain about an
> unsupported link speed.
> 
> Teach axienet's mac_config callback to leave the MAC's speed setting
> alone if the requested speed is SPEED_UNKNOWN.

Hi Andre

Is there an interrupt when SGMII signals a change in link state? If
so, you should call phylink_mac_change().

    Andrew



More information about the linux-arm-kernel mailing list