[PATCH] ARM: enable PCI bridges after assigning resources (was orion/kirkwood pcie issue still open with 2.6.32-rc6 (marvell stock 2.6.22.18 works!))

[Dieter Kiermaier]

Am Donnerstag 12 November 2009 08:31:26 schrieb Simon Kagstrom:
> On Thu, 12 Nov 2009 08:23:44 +0100
> Dieter Kiermaier <dk-arm-linux at gmx.de> wrote:
> 
> > > When kernel is doing PCI resource assignment on ARM, nothing ever
> > > enables PCI bridges, preventing any device behind them from working. The
> > > following patch fixes this.
> > 
> > You hit it :)
> > With your patch my FPGA works behind the bridge together with the marvell git u-boot.
> >
> > To see things clear:
> > Is it possible that the marvell stock u-boot enables all devices before it starts the kernel
> > and that's the reason why it worked if I booted the kernel from stock u-boot and it didn't
> > work with the git u-boot?
> 
> The upstream (I suppose this is what you mean with "git"!) U-boot
> doesn't touch the PCIe configuration at all as far as I know, but
> probably the old Marvell U-boot does, and I guess that's the difference
> we're seeing here.
> 
Yes i meant upstream u-boot (u-boot-marvell tree from denx git repository).

> Anyway, if U-boot isn't using PCIe, it shouldn't touch it, so it's good
> to get the fixes into the kernel.

Yes. IMHO, too.

> 
> // Simon
>