[PATCH] doc: PCI: altera: Fix the 'ranges' property in example
marex at denx.de
Sun Dec 27 23:34:52 PST 2015
On Monday, December 28, 2015 at 07:56:15 AM, Ley Foon Tan wrote:
> On Thu, 2015-12-24 at 10:45 +0100, Marek Vasut wrote:
> > The example does not work on real hardware with the PCIe HIP .
> > The problem is with incorrect "ranges" property in the example, so
> > one cannot just copy-paste the example into his DT and expect this
> > to work. This patches aligns the "ranges" in the example with the
> > reference FPGA design.
> Hi Marek
> The original "ranges" is working for me. What error did you encounter?
Every time a driver accessed the Txs range, the system got stuck hard.
The Cra access always worked fine though, so the PCIe devices were always
I checked with signaltap and my impression is that the wrong address
propagated into the request passed to the Txs port of the HardIP block,
unless I change the range configuration.
Note that I tested Intel Centrino 6235 WiFi card and Atheros AR5006 WiFi
card. The intel in particular uses both the Txs and even MSI , so to use
the intel, the whole PCIe block has to work properly ; with this change,
it does and I can use the intel card just fine.
> >  http://rocketboards.org/foswiki/view/Projects/PCIeRootPortWithMSI
> > Signed-off-by: Marek Vasut <marex at denx.de>
> > Cc: Bjorn Helgaas <bhelgaas at google.com>
> > Cc: Ley Foon Tan <lftan at altera.com>
> > Cc: Marc Zyngier <marc.zyngier at arm.com>
> > Cc: Rob Herring <robh at kernel.org>
> > ---
> > Documentation/devicetree/bindings/pci/altera-pcie.txt | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> > diff --git a/Documentation/devicetree/bindings/pci/altera-pcie.txt
> > b/Documentation/devicetree/bindings/pci/altera-pcie.txt index
> > 2951a6a..d2427c1 100644
> > --- a/Documentation/devicetree/bindings/pci/altera-pcie.txt
> > +++ b/Documentation/devicetree/bindings/pci/altera-pcie.txt
> > @@ -44,6 +44,6 @@ Example
> > <0 0 0 2 &pcie_0 2>,
> > <0 0 0 3 &pcie_0 3>,
> > <0 0 0 4 &pcie_0 4>;
> > - ranges = <0x82000000 0x00000000 0x00000000 0xc0000000 0x00000000
> > 0x10000000 - 0x82000000 0x00000000 0x10000000
> > 0x00000000 0x10000000>; + ranges = <0x82000000 0x00000000
> > 0xc0000000 0x00000000 0x10000000 + 0x82000000 0x00000000
> > 0xd0000000 0x00000000 0x10000000>;
> > };
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