[PATCH net-next] net: mvneta: Add support for 2500Mbps SGMII
davem at davemloft.net
Wed Sep 26 20:27:35 PDT 2018
From: Maxime Chevallier <maxime.chevallier at bootlin.com>
Date: Tue, 25 Sep 2018 15:59:39 +0200
> The mvneta controller can handle speeds up to 2500Mbps on the SGMII
> interface. This relies on serdes configuration, the lane must be
> configured at 3.125Gbps and we can't use in-band autoneg at that speed.
> The main issue when supporting that speed on this particular controller
> is that the link partner can send ethernet frames with a shortened
> preamble, which if not explicitly enabled in the controller will cause
> unexpected behaviours.
> This was tested on Armada 385, with the comphy configuration done in
> Signed-off-by: Maxime Chevallier <maxime.chevallier at bootlin.com>
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