On Thursday 05 May 2016 12:14:59 Florian Fainelli wrote: > From: Jim Quinlan <jim2101024@xxxxxxxxx> > > This patchs adds the Device Tree bindings for the Broadcom STB PCIe root > complex hardware. > > Signed-off-by: Jim Quinlan <jim2101024@xxxxxxxxx> > Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx> > --- > Changes in v2: > > - rewrite the binding document almost from scratch to include many more > references to existing documents > - describe missing properties > - give better examples > > .../devicetree/bindings/pci/brcm,brcmstb-pcie.txt | 98 ++++++++++++++++++++++ > 1 file changed, 98 insertions(+) > create mode 100644 Documentation/devicetree/bindings/pci/brcm,brcmstb-pcie.txt > > diff --git a/Documentation/devicetree/bindings/pci/brcm,brcmstb-pcie.txt b/Documentation/devicetree/bindings/pci/brcm,brcmstb-pcie.txt > new file mode 100644 > index 000000000000..3682b0f0bc26 > --- /dev/null > +++ b/Documentation/devicetree/bindings/pci/brcm,brcmstb-pcie.txt > @@ -0,0 +1,98 @@ > +Broadcom STB PCIe Host Controller Device Tree Bindings > + > +This document describes the binding of the PCIe Root Complex hardware found in > +Broadcom Set Top Box System-on-Chips such as BCM7425 (MIPS), BCM7435 (MIPS) and > +BCM7445 (ARMv7). > + > +Required properties: > +- compatible: must be one of: "brcm,bcm7425-pcie" > + "brcm,bcm7435-pcie" > + "brcm,bcm7445-pcie" > + > +- reg: specifies the physical base address of the controller registers and > + its length > + > +- interrupt-parent: must be a reference (phandle) to the parent interrupt > + controller in the system (7038-l1-intc on MIPS, GIC on ARM/ARM64) > + > +- interrrupts: first interrupt must be the Level 1 interrupt number corresponding > + to the main PCIe RC interrupt, second interrupt must be the MSI interrupt > + See the interrupt-parent documentation for the number of cells and their meaning: > + MIPS: Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7038-l1-intc.txt > + ARM/ARM64: Documentation/devicetree/bindings/interrupt-controller/arm,gic.txt > + > +- interrupt-names: must be "pcie", and if present "msi" When I suggested splitting out the MSI support, I was thinking (but not writing) that you'd use an msi-parent property to refer to the node that holds the msi-controller as well. > +- ranges: ranges for the PCI outbound windows, no I/O or prefetchable windows > + must be specified here, only non-prefetchable. 32-bits windows or 64-bits > + windows are allowed based on the host processor's capabilities (ARM w/ LPAE, > + ARM64). So this supports 64-bit non-prefetchable windows? Usually 64-bit windows are prefetchable. > +- brcm,log2-scb-sizes: log2 size of the SCB window that is mapped to PCIe space > + there must be exactly one value per memory controller present in the system > + (ranges from 1 to 3) I'm still not too happy with this property. I see no reason for the log2 format (rather than length in bytes, or offset/length tuples, or dma-ranges, or phandles pointing to the memory controllers). I think we need to discuss this some more. > +- brcm,gen: integer that indicates desired forced generation of link: 1 => 2.5 > + Gbps, 2 => 5.0 Gbps, 3 => 8.0 Gbps. Will override the auto-negotation if > + specified. to repeat my earlier comment from v1: Shouldn't the link generation be probed automatically? > +- <*>-supply: see Documentation/devicetree/bindings/regulator/regulator.txt > + > +- <*>-supply-names: see Documentation/devicetree/bindings/regulator/regulator.txt I don't see supply-names documented there. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
