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| -rw-r--r-- | Documentation/devicetree/bindings/pci/apple,pcie.yaml | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pci/apple,pcie.yaml b/Documentation/devicetree/bindings/pci/apple,pcie.yaml new file mode 100644 index 000000000..aa38680aa --- /dev/null +++ b/Documentation/devicetree/bindings/pci/apple,pcie.yaml @@ -0,0 +1,174 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pci/apple,pcie.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple PCIe host controller + +maintainers: + - Mark Kettenis <kettenis@openbsd.org> + +description: | + The Apple PCIe host controller is a PCIe host controller with + multiple root ports present in Apple ARM SoC platforms, including + various iPhone and iPad devices and the "Apple Silicon" Macs. + The controller incorporates Synopsys DesigWare PCIe logic to + implements its root ports. But the ATU found on most DesignWare + PCIe host bridges is absent. + + All root ports share a single ECAM space, but separate GPIOs are + used to take the PCI devices on those ports out of reset. Therefore + the standard "reset-gpios" and "max-link-speed" properties appear on + the child nodes that represent the PCI bridges that correspond to + the individual root ports. + + MSIs are handled by the PCIe controller and translated into regular + interrupts. A range of 32 MSIs is provided. These 32 MSIs can be + distributed over the root ports as the OS sees fit by programming + the PCIe controller's port registers. + +properties: + compatible: + items: + - enum: + - apple,t8103-pcie + - apple,t6000-pcie + - const: apple,pcie + + reg: + minItems: 3 + maxItems: 6 + + reg-names: + minItems: 3 + items: + - const: config + - const: rc + - const: port0 + - const: port1 + - const: port2 + - const: port3 + + ranges: + minItems: 2 + maxItems: 2 + + interrupts: + description: + Interrupt specifiers, one for each root port. + minItems: 1 + maxItems: 4 + + msi-parent: true + + msi-ranges: + maxItems: 1 + + iommu-map: true + iommu-map-mask: true + + power-domains: + maxItems: 1 + +required: + - compatible + - reg + - reg-names + - bus-range + - interrupts + - msi-controller + - msi-parent + - msi-ranges + +unevaluatedProperties: false + +allOf: + - $ref: /schemas/pci/pci-bus.yaml# + - $ref: /schemas/interrupt-controller/msi-controller.yaml# + - if: + properties: + compatible: + contains: + const: apple,t8103-pcie + then: + properties: + reg: + maxItems: 5 + interrupts: + maxItems: 3 + +examples: + - | + #include <dt-bindings/interrupt-controller/apple-aic.h> + + soc { + #address-cells = <2>; + #size-cells = <2>; + + pcie0: pcie@690000000 { + compatible = "apple,t8103-pcie", "apple,pcie"; + device_type = "pci"; + + reg = <0x6 0x90000000 0x0 0x1000000>, + <0x6 0x80000000 0x0 0x100000>, + <0x6 0x81000000 0x0 0x4000>, + <0x6 0x82000000 0x0 0x4000>, + <0x6 0x83000000 0x0 0x4000>; + reg-names = "config", "rc", "port0", "port1", "port2"; + + interrupt-parent = <&aic>; + interrupts = <AIC_IRQ 695 IRQ_TYPE_LEVEL_HIGH>, + <AIC_IRQ 698 IRQ_TYPE_LEVEL_HIGH>, + <AIC_IRQ 701 IRQ_TYPE_LEVEL_HIGH>; + + msi-controller; + msi-parent = <&pcie0>; + msi-ranges = <&aic AIC_IRQ 704 IRQ_TYPE_EDGE_RISING 32>; + + iommu-map = <0x100 &dart0 1 1>, + <0x200 &dart1 1 1>, + <0x300 &dart2 1 1>; + iommu-map-mask = <0xff00>; + + bus-range = <0 3>; + #address-cells = <3>; + #size-cells = <2>; + ranges = <0x43000000 0x6 0xa0000000 0x6 0xa0000000 0x0 0x20000000>, + <0x02000000 0x0 0xc0000000 0x6 0xc0000000 0x0 0x40000000>; + + power-domains = <&ps_apcie_gp>; + pinctrl-0 = <&pcie_pins>; + pinctrl-names = "default"; + + pci@0,0 { + device_type = "pci"; + reg = <0x0 0x0 0x0 0x0 0x0>; + reset-gpios = <&pinctrl_ap 152 0>; + + #address-cells = <3>; + #size-cells = <2>; + ranges; + }; + + pci@1,0 { + device_type = "pci"; + reg = <0x800 0x0 0x0 0x0 0x0>; + reset-gpios = <&pinctrl_ap 153 0>; + + #address-cells = <3>; + #size-cells = <2>; + ranges; + }; + + pci@2,0 { + device_type = "pci"; + reg = <0x1000 0x0 0x0 0x0 0x0>; + reset-gpios = <&pinctrl_ap 33 0>; + + #address-cells = <3>; + #size-cells = <2>; + ranges; + }; + }; + }; |