On Fri, Apr 20, 2018 at 3:14 PM, Ran Shalit <ransha...@gmail.com> wrote: > On Fri, Apr 20, 2018 at 3:05 PM, Andrew Lunn <and...@lunn.ch> wrote: >> On Fri, Apr 20, 2018 at 03:01:09PM +0300, Ran Shalit wrote: >>> On Fri, Apr 20, 2018 at 2:55 PM, Andrew Lunn <and...@lunn.ch> wrote: >>> > On Fri, Apr 20, 2018 at 11:44:14AM +0300, Ran Shalit wrote: >>> >> Hello, >>> >> >>> >> We configure external switch in u-boot. >>> >> The configuration is through mdio (cpu is mac and switch is phy). >>> >> >>> >> But in Linux we rather not implement any communication in mdio to >>> >> switch, but it means that we then don't have the information of link >>> >> state. >>> >> >>> >> Is it possible to force in Linux (by default in startup) Ethernet >>> >> connectivity (netif_carrier_on, netif_wake_queue) even if there is no >>> >> information of real link state ? >>> > >>> > Hi Ran >>> > >>> > Use a fixed-phy. >>> > >>> >>> Hi Andrew, >>> >>> I'll check about fixed phy, >>> but in general, is it a problem to have always netif_carrier_on, even >>> when there is no link ? >> >> The link between the CPU and the switch should be up all the >> time. That is the point of fixed-link. >> > > I understand. > But what about the mac driver, does it just do netif_start_queue ? >
By saying "mac driver", I mean Ethernet driver with fixed phy. Regards, Ranran > Thanks > > >> Andrew
