[PATCH] ARM: shmobile: Lager: add Micrel KSZ8041 PHY fixup

[Simon Horman]

On Wed, Sep 25, 2013 at 11:50:45PM -0700, Magnus Damm wrote:
> On Fri, Sep 13, 2013 at 5:29 PM, Sergei Shtylyov
> <sergei.shtylyov at cogentembedded.com> wrote:
> > Currently on the Lager board NFS timeouts/delays are seen when booting.  That
> > turned out to happen because the SoC's ETH_LINK signal turns on and off after
> > each packet.  It is connected to Micrel KSZ8041 PHY's LED0 signal. Ether LEDs
> > on the Lager board are named LINK and ACTIVE which corresponds to non-default
> > 01 setting of the PHY control register 1 bits 14-15. The 'sh_eth' driver resets
> > the PHY when opening the network device, so we have to set the mentioned bits
> > back to 01 from the default 00 value which causes bouncing of ETH_LINK.  That
> > can be achieved using the PHY platform fixup mechanism if we also modify the
> > driver to use it..
> >
> > Signed-off-by: Sergei Shtylyov <sergei.shtylyov at cogentembedded.com>
> 
> Hi Sergei,
> 
> Thanks for your efforts on this. Nice to see that Ethernet for Lager
> board support is improving.
> 
> Can you please share with us with link speeds you tested? I suspect
> that this patch is only needed for some case, like for instance 100
> MBit Full Duplex. Fixing the PHY settings makes sense even though only
> a single mode needs it, but knowing which link speeds that are known
> to work would help a lot.

Magnus,

I currently have this queued up as a fix for v3.12.
Let me know if you would like me to drop it for now.