Hi, On 12/11/18 5:59 PM, Russell King - ARM Linux wrote: > Hi, > > This series adds support for dynamically switching between 1Gbps > and 2.5Gbps networking for the Marvell Armada 38x SoCs, tested on > Armada 388 on the Clearfog platform. > > This is necessary to be able to connect (eg) a Clearfog platform > with a Macchiatobin platform via the SFP sockets, as Clearfog > currently only supports 1Gbps networking via the SFP socket and > Macchiatobin defaults to 2.5Gbps when using Fiberchannel SFPs. > > In order to allow dynamic switching, we need to implement a common > phy driver to switch the ethernet serdes lane speed - 2.5Gbps is > just 1Gbps up-clocked by 2.5x. We implement a simple comphy > driver to achieve this, which only supports networking. > > With this, we are able to support both Fiberchannel SFPs operating > at 2.5Gbps or 1Gbps, and 1G ethernet SFPs plugged into the Clearfog > platform, dynamically selecting according to the SFPs abilities. > > I'm aware of the proposed changes to the PHY layer, changing > phy_set_mode() to take the ethernet phy interface type, hence why > this is RFC - there's also the question about how this will be > merged. This series is currently based on 4.20-rc1, but will > likely need to be rebased when the PHY layer changes hit. For this case, I'd prefer the phy_set_mode series and the phy and net changes here (after rebasing) go via linux-phy tree. Thanks Kishon
