From d7c7c051e8e5f781c98310709f3feaf7e634251b Mon Sep 17 00:00:00 2001 From: Mayank Rana Date: Mon, 16 Jun 2025 15:42:58 -0700 Subject: [PATCH] dt-bindings: PCI: qcom,pcie-sa8255p: Document ECAM compliant PCIe root complex Document the required configuration to enable the PCIe Root Complex on SA8255p, which is managed by firmware using power-domain based handling and configured as ECAM compliant. Signed-off-by: Mayank Rana Signed-off-by: Manivannan Sadhasivam [bhelgaas: add "ECAM" in reg description] Signed-off-by: Bjorn Helgaas Reviewed-by: Rob Herring (Arm) Link: https://patch.msgid.link/20250616224259.3549811-4-mayank.rana@oss.qualcomm.com --- .../bindings/pci/qcom,pcie-sa8255p.yaml | 122 ++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/qcom,pcie-sa8255p.yaml diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-sa8255p.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-sa8255p.yaml new file mode 100644 index 0000000000000..ef705a02fcd97 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/qcom,pcie-sa8255p.yaml @@ -0,0 +1,122 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pci/qcom,pcie-sa8255p.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm SA8255p based firmware managed and ECAM compliant PCIe Root Complex + +maintainers: + - Bjorn Andersson + - Manivannan Sadhasivam + +description: + Qualcomm SA8255p SoC PCIe root complex controller is based on the Synopsys + DesignWare PCIe IP which is managed by firmware, and configured in ECAM mode. + +properties: + compatible: + const: qcom,pcie-sa8255p + + reg: + description: + The base address and size of the ECAM area for accessing PCI + Configuration Space, as accessed from the parent bus. The base + address corresponds to the first bus in the "bus-range" property. If + no "bus-range" is specified, this will be bus 0 (the default). + maxItems: 1 + + ranges: + description: + As described in IEEE Std 1275-1994, but must provide at least a + definition of non-prefetchable memory. One or both of prefetchable Memory + may also be provided. + minItems: 1 + maxItems: 2 + + interrupts: + minItems: 8 + maxItems: 8 + + interrupt-names: + items: + - const: msi0 + - const: msi1 + - const: msi2 + - const: msi3 + - const: msi4 + - const: msi5 + - const: msi6 + - const: msi7 + + power-domains: + maxItems: 1 + + dma-coherent: true + iommu-map: true + +required: + - compatible + - reg + - ranges + - power-domains + - interrupts + - interrupt-names + +allOf: + - $ref: /schemas/pci/pci-host-bridge.yaml# + +unevaluatedProperties: false + +examples: + - | + #include + + soc { + #address-cells = <2>; + #size-cells = <2>; + + pci@1c00000 { + compatible = "qcom,pcie-sa8255p"; + reg = <0x4 0x00000000 0 0x10000000>; + device_type = "pci"; + #address-cells = <3>; + #size-cells = <2>; + ranges = <0x02000000 0x0 0x40100000 0x0 0x40100000 0x0 0x1ff00000>, + <0x43000000 0x4 0x10100000 0x4 0x10100000 0x0 0x40000000>; + bus-range = <0x00 0xff>; + dma-coherent; + linux,pci-domain = <0>; + power-domains = <&scmi5_pd 0>; + iommu-map = <0x0 &pcie_smmu 0x0000 0x1>, + <0x100 &pcie_smmu 0x0001 0x1>; + interrupt-parent = <&intc>; + interrupts = , + , + , + , + , + , + , + ; + interrupt-names = "msi0", "msi1", "msi2", "msi3", + "msi4", "msi5", "msi6", "msi7"; + + #interrupt-cells = <1>; + interrupt-map-mask = <0 0 0 0x7>; + interrupt-map = <0 0 0 1 &intc GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 2 &intc GIC_SPI 149 IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 3 &intc GIC_SPI 150 IRQ_TYPE_LEVEL_HIGH>, + <0 0 0 4 &intc GIC_SPI 151 IRQ_TYPE_LEVEL_HIGH>; + + pcie@0 { + device_type = "pci"; + reg = <0x0 0x0 0x0 0x0 0x0>; + bus-range = <0x01 0xff>; + + #address-cells = <3>; + #size-cells = <2>; + ranges; + }; + }; + }; -- 2.47.2