netdev - Re: Q: force netif ON even when there is no real link ?

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Date:   Fri, 20 Apr 2018 13:55:56 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Ran Shalit <ranshalit@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: Q: force netif ON even when there is no real link ?

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.

    Andrew