On 05/02/15 12:25, Pavel Machek wrote: > Hi! > > This happened on more than one project: there's gigabit-capable chip, > but the connector is not designed for gigabit speed. > > I'd like to have speed autonegotiation, but not offer gigabit (as it > will not work). > > Is there way to do that without hacking the kernel? Should mii-tool do > that?
Since you use the PHY library, you should be able to do something like this in your PHY driver prior to starting the PHY state machine: phydev->supported &= PHY_BASIC_FEATURES (effectively masking Gigabit capability) See drivers/net/ethernet/broadcom/genet/bcmmii.c for instance where this is done based on the type of interface (RevMII, MII) we are connected to. > > Thanks, > Pavel > > root@ib8315:~# mii-tool.net-tools -A 100baseTx,10baseT eth1 > restarting autonegotiation... > root@ib8315:~# [32432.443883] libphy: mdio@e0024520:01 - Link is Down > > root@ib8315:~# [32435.447863] libphy: mdio@e0024520:01 - Link is Up - > 1000/Full > > root@ib8315:~# mii-tool.net-tools -v eth1 > eth1: negotiated 1000baseT-FD flow-control, link ok > product info: vendor 00:01:c1, model 3 rev 1 > basic mode: autonegotiation enabled > basic status: autonegotiation complete, link ok > capabilities: 1000baseT-FD 100baseTx-FD 100baseTx-HD > 10baseT-FD 10baseT-HD > advertising: 1000baseT-FD 100baseTx-FD 100baseTx-HD > 10baseT-FD 10baseT-HD > link partner: 1000baseT-FD 100baseTx-FD 100baseTx-HD > 10baseT-FD 10baseT-HD flow-control > root@ib8315:~# mii-tool.net-tools -V > $Id: mii-tool.c,v 1.9 2006/09/27 20:59:18 ecki Exp $ > (Author: David Hinds based on Donald Becker's mii-diag) > net-tools 1.60 > root@ib8315:~# > > -- Florian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
