Re: [PATCH] net: ethernet: mvneta: add support for 2.5G DRSGMII mode

From: Jan Luebbe <redacted>
Date: Mon, 23 Jan 2017 15:22:06 +0100

The Marvell MVNETA Ethernet controller supports a 2.5 Gbps SGMII mode
called DRSGMII.

This patch adds a corresponding phy-mode string 'drsgmii' and parses it
from DT. The MVNETA then configures the SERDES protocol value
accordingly.

It was successfully tested on a MV78460 connected to a FPGA.

Signed-off-by: Jan Luebbe <redacted>

I still haven't seen a sufficient explanation as to why this change
works without any explicit MAC programming changes to this driver.

That really needs to be explained before I will apply this patch.

Thanks.
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