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Diffstat (limited to 'Documentation/devicetree/bindings/pci')
3 files changed, 133 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt index ed0d9b9fff2b..9f4faa8e8d00 100644 --- a/Documentation/devicetree/bindings/pci/designware-pcie.txt +++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt @@ -23,3 +23,6 @@ Required properties: Optional properties: - reset-gpio: gpio pin number of power good signal +- bus-range: PCI bus numbers covered (it is recommended for new devicetrees to + specify this property, to keep backwards compatibility a range of 0x00-0xff + is assumed if not present) diff --git a/Documentation/devicetree/bindings/pci/pci-keystone.txt b/Documentation/devicetree/bindings/pci/pci-keystone.txt new file mode 100644 index 000000000000..ceb3e2424742 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/pci-keystone.txt @@ -0,0 +1,68 @@ +TI Keystone PCIe interface + +Keystone PCI host Controller is based on Designware PCI h/w version 3.65. +It shares common functions with PCIe Designware core driver and inherit +common properties defined in +Documentation/devicetree/bindings/pci/designware-pci.txt + +Please refer to Documentation/devicetree/bindings/pci/designware-pci.txt +for the details of Designware DT bindings. Additional properties are +described here as well as properties that are not applicable. + +Required Properties:- + +compatibility: "ti,keystone-pcie" +reg: index 1 is the base address and length of DW application registers. + index 2 is the base address and length of PCI mode configuration + register. + index 3 is the base address and length of PCI device ID register. + +pcie_msi_intc : Interrupt controller device node for MSI IRQ chip + interrupt-cells: should be set to 1 + interrupt-parent: Parent interrupt controller phandle + interrupts: GIC interrupt lines connected to PCI MSI interrupt lines + + Example: + pcie_msi_intc: msi-interrupt-controller { + interrupt-controller; + #interrupt-cells = <1>; + interrupt-parent = <&gic>; + interrupts = <GIC_SPI 30 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 31 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 32 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 33 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 34 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 35 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 36 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 37 IRQ_TYPE_EDGE_RISING>; + }; + +pcie_intc: Interrupt controller device node for Legacy IRQ chip + interrupt-cells: should be set to 1 + interrupt-parent: Parent interrupt controller phandle + interrupts: GIC interrupt lines connected to PCI Legacy interrupt lines + + Example: + pcie_intc: legacy-interrupt-controller { + interrupt-controller; + #interrupt-cells = <1>; + interrupt-parent = <&gic>; + interrupts = <GIC_SPI 26 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 27 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 28 IRQ_TYPE_EDGE_RISING>, + <GIC_SPI 29 IRQ_TYPE_EDGE_RISING>; + }; + +Optional properties:- + phys: phandle to Generic Keystone SerDes phy for PCI + phy-names: name of the Generic Keystine SerDes phy for PCI + - If boot loader already does PCI link establishment, then phys and + phy-names shouldn't be present. + +Designware DT Properties not applicable for Keystone PCI + +1. pcie_bus clock-names not used. Instead, a phandle to phys is used. + +Note for PCI driver usage +========================= +Driver requires pci=pcie_bus_perf in the bootargs for proper functioning. diff --git a/Documentation/devicetree/bindings/pci/xilinx-pcie.txt b/Documentation/devicetree/bindings/pci/xilinx-pcie.txt new file mode 100644 index 000000000000..3e2c88d97ad4 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/xilinx-pcie.txt @@ -0,0 +1,62 @@ +* Xilinx AXI PCIe Root Port Bridge DT description + +Required properties: +- #address-cells: Address representation for root ports, set to <3> +- #size-cells: Size representation for root ports, set to <2> +- #interrupt-cells: specifies the number of cells needed to encode an + interrupt source. The value must be 1. +- compatible: Should contain "xlnx,axi-pcie-host-1.00.a" +- reg: Should contain AXI PCIe registers location and length +- device_type: must be "pci" +- interrupts: Should contain AXI PCIe interrupt +- interrupt-map-mask, + interrupt-map: standard PCI properties to define the mapping of the + PCI interface to interrupt numbers. +- ranges: ranges for the PCI memory regions (I/O space region is not + supported by hardware) + Please refer to the standard PCI bus binding document for a more + detailed explanation + +Optional properties: +- bus-range: PCI bus numbers covered + +Interrupt controller child node ++++++++++++++++++++++++++++++++ +Required properties: +- interrupt-controller: identifies the node as an interrupt controller +- #address-cells: specifies the number of cells needed to encode an + address. The value must be 0. +- #interrupt-cells: specifies the number of cells needed to encode an + interrupt source. The value must be 1. + +NOTE: +The core provides a single interrupt for both INTx/MSI messages. So, +created a interrupt controller node to support 'interrupt-map' DT +functionality. The driver will create an IRQ domain for this map, decode +the four INTx interrupts in ISR and route them to this domain. + + +Example: +++++++++ + + pci_express: axi-pcie@50000000 { + #address-cells = <3>; + #size-cells = <2>; + #interrupt-cells = <1>; + compatible = "xlnx,axi-pcie-host-1.00.a"; + reg = < 0x50000000 0x10000000 >; + device_type = "pci"; + interrupts = < 0 52 4 >; + interrupt-map-mask = <0 0 0 7>; + interrupt-map = <0 0 0 1 &pcie_intc 1>, + <0 0 0 2 &pcie_intc 2>, + <0 0 0 3 &pcie_intc 3>, + <0 0 0 4 &pcie_intc 4>; + ranges = < 0x02000000 0 0x60000000 0x60000000 0 0x10000000 >; + + pcie_intc: interrupt-controller { + interrupt-controller; + #address-cells = <0>; + #interrupt-cells = <1>; + } + }; |