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|
# 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,t8112-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;
};
};
};
|
