Re: [PATCH v7 5/6] Documentation: dt-bindings: pci: altera pcie device tree binding

[Marc Zyngier]

On Fri, 2 Oct 2015 23:56:37 +0200
Arnd Bergmann <arnd@xxxxxxxx> wrote:

> On Friday 02 October 2015 15:53:44 Ley Foon Tan wrote:
> > > Strictly speaking, if you have undocumented bindings downstream that
> > > is your problem and we don't have to accept them as-is upstream. I'm
> > > not going to worry about that here.
> > >
> > >>> txs contains the config space?
> > >> It is not the config space, but a memory slave port.
> > >
> > > Then where is the config space? It should not be part of "ranges" is
> > > all I care about.
> > The config space is not part of "ranges". Our IP uses TLP packet to
> > access config space.
> > 
> 
> It took me a bit to figure out what you mean here. To save others
> from reading the source, here is what I found:
> 
> * The config space is accessed indirectly through registers from the
>   "cra" register range, which is the right approach according to the
>   point that Rob made.
> * hardware-wise this basically looks like bit-banged PCIe, which is
>   both awesome and scary ;-)

drivers/pcie/host/pcie-host-gpio.c anyone? ;-)

	M.
-- 
Jazz is not dead. It just smells funny.
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