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Date: Mon, 30 Oct 2017 11:40:25 +0100 From: Andrew Lunn <andrew@...n.ch> To: Aaro Koskinen <aaro.koskinen@....fi> Cc: "David S. Miller" <davem@...emloft.net>, Dan Carpenter <dan.carpenter@...cle.com>, netdev@...r.kernel.org Subject: Re: [REGRESSION, BISECTED] Broken networking with net/phy/marvell On Mon, Oct 30, 2017 at 02:19:54AM +0200, Aaro Koskinen wrote: > Hi, > > On Sat, Oct 28, 2017 at 09:01:39PM +0200, Andrew Lunn wrote: > > On Thu, Oct 26, 2017 at 03:28:36PM +0300, Aaro Koskinen wrote: > > > When upgrading from v4.13 to v4.14-rc6 on OpenRD Client, the box loses > > > network connectivity. > > > > What exactly is the PHY in the OpenRD? > > 88E1116R. > > > Please can you print the value of mscr before it is changed. > > [ 3.377836] MSCR BEFORE: 00001070 > [ 3.381176] MSCR AFTER: 00001040 > > One possibility, is that the bootloader is setting the PHY to > > rgmii-id. So the initial value does seem to suggest the bootloader is setting it. This is now getting cleared, where earlier it was > > preserved. If this is true, it should be solved by adding > > > > phy-mode = "rgmii-id" to the ethernet node in the device tree. > > Ok, that seems to help: > > [ 3.377852] MSCR BEFORE: 00001070 > [ 3.381189] MSCR AFTER: 00001070 Great. Thanks for testing this. I don't like it regressing though, so i want to see if it is possible to fix this without needing to add the phy mode. I hope to look at this in the next couple of days. Thanks Andrew
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