Automatically detecting when to use kirkwood-tsXXX-6281.dtb vs -6282.dtb (Was: Re: [PATCH 21/21] ARM: Kirkwood: Remove DT support)

[Ian Campbell]

On Sat, 2014-05-03 at 16:40 +0200, Andrew Lunn wrote:
> > However on my 6281 based TS-219 system there seems to be no visible PCI
> > bus when running the 3.2 kernel in the current Debian stable release
> > (which of course uses board support). Some info:
> 
> The old PCI driver looks to see if there is anything on the bus, and
> if not, does not register the PCI bus to the PCI core. The new PCI
> driver always registers the busses, allowing hotplug of PCI devices.

Got it, thanks.

> > Is the lack of anything on the PCI bus itself sufficient to determine
> > that this is a 6281 based ts219 rather than a 6282 one (I don't have any
> > 6282 ts219 systems to try)?
> 
> No, this is not sufficient, as far as i know. I have a 6282 based
> ts119. It also does not have any PCI devices. However, the 6282 DT
> file works fine on it. There is no need to differentiate between 119
> and 219, just between 6281 and 6282.

Thanks.

> Your idea about Ethernet PHY is probably the best way to tell them
> apart. But i will see if i can find anything else.

Thanks, I'll start on the PHY base solution, it'll be easy enough to
switch if something even better gets thought up.

Cheers,
Ian.