[PATCH] net: mvneta: properly disable HW PHY polling and ensure adjust_link() works

[Jason Cooper]

On Thu, Sep 05, 2013 at 10:26:59AM +0200, Thomas Petazzoni wrote:
> On Thu, 5 Sep 2013 09:44:26 +0200, Willy Tarreau wrote:
> > One simpler solution for them could be to slightly modify the boot loader
> > so that it sets the MAC address on the two ethernet controllers prior to
> > boot. Then your code which checks if a MAC is already set will simply
> > work.
> 
> This works when the network driver is compiled 'statically' inside the
> kernel. When compiled as a module, then the gatable clock of the
> network interface will be gated at the end of the kernel boot, before
> the mvneta module is probe. And gating the network interface clocks
> means that it will loose its state, including its MAC address. So it's
> not an entirely perfect solution either, but I admit that on such
> platforms, the network driver is most likely compiled statically, so it
> would probably suit the needs of most people.

Up until sleep and standby modes are supported.  Proper power savings
would include gating the clock...

thx,

Jason.