----- Original Message ----- > From: "Scott Wood" <scottw...@freescale.com> > Sent: Tuesday, August 26, 2014 3:52:56 PM > > On Mon, 2014-08-25 at 18:54 -0500, Aaron Sierra wrote: > > The following commit prevents the MPC8548E on the XPedite5200 PrPMC > > module from enumerating its PCI/PCI-X bus: > > > > powerpc/fsl-pci: use 'Header Type' to identify PCIE mode > > > > The previous patch prevents any Freescale PCI-X bridge from enumerating > > the bus, if it is hardware strapped into Agent mode. > > > > In PCI-X, the Host is responsible for driving the PCI-X initialization > > pattern to devices on the bus, so that they know whether to operate in > > conventional PCI or PCI-X mode as well as what the bus timing will be. > > For a PCI-X PrPMC, the pattern is driven by the mezzanine carrier it is > > installed onto. Therefore, PrPMCs are PCI-X Agents, but one per system > > may still enumerate the bus. > > > > This patch causes the device node of any PCI/PCI-X bridge strapped into > > Agent mode to be checked for the fsl,pci-agent-force-enum property. If > > the property is present in the node, the bridge will be allowed to > > enumerate the bus. > > > > Cc: Minghuan Lian <minghuan.l...@freescale.com> > > Signed-off-by: Aaron Sierra <asie...@xes-inc.com> > > --- > > .../bindings/pci/fsl,pci-agent-force-enum.txt | 27 > > ++++++++++++++++++++++ > > arch/powerpc/sysdev/fsl_pci.c | 3 ++- > > 2 files changed, 29 insertions(+), 1 deletion(-) > > create mode 100644 > > Documentation/devicetree/bindings/pci/fsl,pci-agent-force-enum.txt > > > > diff --git > > a/Documentation/devicetree/bindings/pci/fsl,pci-agent-force-enum.txt > > b/Documentation/devicetree/bindings/pci/fsl,pci-agent-force-enum.txt > > new file mode 100644 > > index 0000000..d8ac4a7 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/pci/fsl,pci-agent-force-enum.txt > > This ought to be part of a general fsl,pci binding, rather than its own > file. Unfortunately there isn't such a binding yet, but let's call this > something like "fsl,pci.txt" anyway so that there's a place to add the > rest of the binding to.
Ok, no problem. > Also, CC devicet...@vger.kernel.org on all device tree patches. Will do. > Otherwise it looks OK. > > -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
