[PATCH 1/3] fec: restart autoneg at open instead of init

[Eric Bénard]

Hi Sascha,

Le Fri, 7 Sep 2012 08:57:03 +0200,
Sascha Hauer <s.hauer at pengutronix.de> a écrit :

> Hi Eric,
> 
> On Thu, Sep 06, 2012 at 09:39:29PM +0200, Eric Bénard wrote:
> > this saves some time during boot when ethernet is not needed in barebox
> 
> Is this really significant on your hardware? I made a measurement here
> and the miidev_restart_aneg() takes 130us on an i.MX27 board.
> 
> The original intention of doing it at init time was that autonegotation
> is already completed when we actually use the network. And this time
> really is significant:
> 
> without the patch:
> 
> barebox at Phytec phyCORE-i.MX27:/ time ping 192.168.23.4
> warning: No MAC address set. Using random address 62:FE:FE:0B:09:A8
> phy0: Link is up - 100/Full
> host 192.168.23.4 is alive
> time: 10ms
> 
> with the patch:
> 
> barebox at Phytec phyCORE-i.MX27:/ time ping 192.168.23.4
> warning: No MAC address set. Using random address A6:1B:AB:80:FA:E7
> phy0: Link is up - 100/Full
> host 192.168.23.4 is alive
> time: 2040ms
> 
that strange. I don't see why miidev_restart_aneg() would take less
time at boot than at open.

Eric