On Tue, Oct 24, 2017 at 02:15:43PM -0400, Jim Quinlan wrote:
> The DT bindings description of the Brcmstb PCIe device is described. This
> node can be used by almost all Broadcom settop box chips, using
> ARM, ARM64, or MIPS CPU architectures.
"dt-bindings: pci: ..." for the subject please.
>
> Signed-off-by: Jim Quinlan <jim2101024@xxxxxxxxx>
> ---
> .../devicetree/bindings/pci/brcmstb-pci.txt | 63 ++++++++++++++++++++++
> 1 file changed, 63 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pci/brcmstb-pci.txt
>
> diff --git a/Documentation/devicetree/bindings/pci/brcmstb-pci.txt b/Documentation/devicetree/bindings/pci/brcmstb-pci.txt
> new file mode 100644
> index 0000000..49f9852
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/brcmstb-pci.txt
> @@ -0,0 +1,63 @@
> +Brcmstb PCIe Host Controller Device Tree Bindings
> +
> +Required Properties:
> +- compatible
> + "brcm,bcm7425-pcie" -- for 7425 family MIPS-based SOCs.
> + "brcm,bcm7435-pcie" -- for 7435 family MIPS-based SOCs.
> + "brcm,bcm7445-pcie" -- for 7445 and later ARM based SOCs (not including
> + the 7278).
> + "brcm,bcm7278-pcie" -- for 7278 family ARM-based SOCs.
> +
> +- reg -- the register start address and length for the PCIe reg block.
> +- interrupts -- two interrupts are specified; the first interrupt is for
> + the PCI host controller and the second is for MSI if the built-in
> + MSI controller is to be used.
> +- interrupt-names -- names of the interrupts (above): "pcie" and "msi".
> +- #address-cells -- set to <3>.
> +- #size-cells -- set to <2>.
> +- #interrupt-cells: set to <1>.
> +- interrupt-map-mask and interrupt-map, standard PCI properties to define the
> + mapping of the PCIe interface to interrupt numbers.
> +- ranges: ranges for the PCI memory and I/O regions.
> +- linux,pci-domain -- should be unique per host controller.
> +
> +Optional Properties:
> +- clocks -- phandle of pcie clock.
> +- clock-names -- set to "sw_pcie" if clocks is used.
> +- dma-ranges -- Specifies the inbound memory mapping regions when
> + an "identity map" is not possible.
> +- msi-controller -- this property is typically specified to have the
> + PCIe controller use its internal MSI controller.
> +- msi-parent -- set to use an external MSI interrupt controller.
> +- brcm,ssc -- (boolean) indicates usage of spread-spectrum clocking.
Use the same one already defined for Broadcom SATA phy.
> +- max-link-speed -- (integer) indicates desired generation of link:
> + 1 => 2.5 Gbps (gen1), 2 => 5.0 Gbps (gen2), 3 => 8.0 Gbps (gen3).
> +- xyz-supply -- set to a voltage regulator phandle that the root
> + complex should turn off/on/on on suspend/resume/boot. Any property
> + matching '-supply' will be added to an internal list of phandles.
Still not really liking this...
> +
> +
> +Example Node:
> +
> +pcie0: pcie@f0460000 {
> + reg = <0x0 0xf0460000 0x0 0x9310>;
> + interrupts = <0x0 0x0 0x4>;
> + compatible = "brcm,pci-plat-dev";
> + #address-cells = <3>;
> + #size-cells = <2>;
> + ranges = <0x02000000 0x00000000 0x00000000 0x00000000 0xc0000000 0x00000000 0x08000000
> + 0x02000000 0x00000000 0x08000000 0x00000000 0xc8000000 0x00000000 0x08000000>;
> + #interrupt-cells = <1>;
> + interrupt-map-mask = <0 0 0 7>;
> + interrupt-map = <0 0 0 1 &intc 0 47 3
> + 0 0 0 2 &intc 0 48 3
> + 0 0 0 3 &intc 0 49 3
> + 0 0 0 4 &intc 0 50 3>;
> + clocks = <&sw_pcie0>;
> + clock-names = "sw_pcie";
> + msi-parent = <&pcie0>; /* use PCIe's internal MSI controller */
> + msi-controller; /* use PCIe's internal MSI controller */
> + brcm,ssc;
> + max-link-speed = <1>;
> + linux,pci-domain = <0>;
> + };
> --
> 1.9.0.138.g2de3478
>
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