From: Tim Harvey <thar...@gateworks.com> Sent: Friday, April 07, 2017 10:47 PM >To: netdev <netdev@vger.kernel.org> >Cc: Fabio Estevam <fabio.este...@nxp.com>; Lucas Stach ><l.st...@pengutronix.de>; Andy Duan <fugang.d...@nxp.com>; Koen >Vandeputte <koen.vandepu...@ncentric.com> >Subject: IMX6 FEC connection drops occasionally with 'MDIO read timeout' > >Greetings, > >I've had a couple of users report that they are getting occasional link drops >when using IMX6 FEC on our boards which are using a Marvell >88E1510 PHY: > >[ 9348.474418] fec 2188000.ethernet eth0: MDIO read timeout [ 9350.478804] >fec 2188000.ethernet eth0: Link is Down > >If they bring the interface back up it works fine. > >The most recent version of Linux they have tested and seen this on is >v4.9 with CONFIG_MARVELL_PHY=y > >Has anyone else run into this or know what the issue could be? Should there >be any retries at the MDIO level or above? > >Regards, > >Tim
Pls keep ipg clock always on and try it. In general, MDIO timeout maybe caused by ipg clock off and mii interrupt lost. Regards, Andy
