Re: [PATCH 07/14] net: axienet: Fix SGMII support
From: Andrew Lunn <andrew@lunn.ch>
Date: 2020-01-10 14:04:32
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linux-arm-kernel, lkml
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