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- From 417e4745f7470ca8b9809056485eb7a81305019b Mon Sep 17 00:00:00 2001
- From: Jim Quinlan <[email protected]>
- Date: Mon, 15 Jan 2018 18:28:39 -0500
- Subject: [PATCH] dt-bindings: pci: Add DT docs for Brcmstb PCIe device
- 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.
- Signed-off-by: Jim Quinlan <[email protected]>
- ---
- .../devicetree/bindings/pci/brcmstb-pcie.txt | 59 +++++++++++++++++++
- 1 file changed, 59 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/pci/brcmstb-pcie.txt
- --- /dev/null
- +++ b/Documentation/devicetree/bindings/pci/brcmstb-pcie.txt
- @@ -0,0 +1,59 @@
- +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,enable-ssc -- (boolean) indicates usage of spread-spectrum clocking.
- +- max-link-speed -- (integer) indicates desired generation of link:
- + 1 => 2.5 Gbps (gen1), 2 => 5.0 Gbps (gen2), 3 => 8.0 Gbps (gen3).
- +
- +Example Node:
- +
- +pcie0: pcie@f0460000 {
- + reg = <0x0 0xf0460000 0x0 0x9310>;
- + interrupts = <0x0 0x0 0x4>;
- + compatible = "brcm,bcm7445-pcie";
- + #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>;
- + };
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