forked from Qortal/Brooklyn
60 lines
2.4 KiB
Plaintext
60 lines
2.4 KiB
Plaintext
Brcmstb PCIe Host Controller Device Tree Bindings
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Required Properties:
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- compatible
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"brcm,bcm7425-pcie" -- for 7425 family MIPS-based SOCs.
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"brcm,bcm7435-pcie" -- for 7435 family MIPS-based SOCs.
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"brcm,bcm7445-pcie" -- for 7445 and later ARM based SOCs (not including
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the 7278).
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"brcm,bcm7278-pcie" -- for 7278 family ARM-based SOCs.
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- reg -- the register start address and length for the PCIe reg block.
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- interrupts -- two interrupts are specified; the first interrupt is for
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the PCI host controller and the second is for MSI if the built-in
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MSI controller is to be used.
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- interrupt-names -- names of the interrupts (above): "pcie" and "msi".
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- #address-cells -- set to <3>.
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- #size-cells -- set to <2>.
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- #interrupt-cells: set to <1>.
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- interrupt-map-mask and interrupt-map, standard PCI properties to define the
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mapping of the PCIe interface to interrupt numbers.
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- ranges: ranges for the PCI memory and I/O regions.
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- linux,pci-domain -- should be unique per host controller.
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Optional Properties:
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- clocks -- phandle of pcie clock.
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- clock-names -- set to "sw_pcie" if clocks is used.
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- dma-ranges -- Specifies the inbound memory mapping regions when
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an "identity map" is not possible.
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- msi-controller -- this property is typically specified to have the
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PCIe controller use its internal MSI controller.
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- msi-parent -- set to use an external MSI interrupt controller.
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- brcm,enable-ssc -- (boolean) indicates usage of spread-spectrum clocking.
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- max-link-speed -- (integer) indicates desired generation of link:
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1 => 2.5 Gbps (gen1), 2 => 5.0 Gbps (gen2), 3 => 8.0 Gbps (gen3).
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Example Node:
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pcie0: pcie@f0460000 {
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reg = <0x0 0xf0460000 0x0 0x9310>;
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interrupts = <0x0 0x0 0x4>;
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compatible = "brcm,bcm7445-pcie";
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#address-cells = <3>;
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#size-cells = <2>;
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ranges = <0x02000000 0x00000000 0x00000000 0x00000000 0xc0000000 0x00000000 0x08000000
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0x02000000 0x00000000 0x08000000 0x00000000 0xc8000000 0x00000000 0x08000000>;
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#interrupt-cells = <1>;
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interrupt-map-mask = <0 0 0 7>;
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interrupt-map = <0 0 0 1 &intc 0 47 3
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0 0 0 2 &intc 0 48 3
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0 0 0 3 &intc 0 49 3
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0 0 0 4 &intc 0 50 3>;
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clocks = <&sw_pcie0>;
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clock-names = "sw_pcie";
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msi-parent = <&pcie0>; /* use PCIe's internal MSI controller */
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msi-controller; /* use PCIe's internal MSI controller */
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brcm,ssc;
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max-link-speed = <1>;
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linux,pci-domain = <0>;
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};
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