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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/mediatek-pcie-gen3.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Gen3 PCIe controller on MediaTek SoCs
maintainers:
- Jianjun Wang <jianjun.wang@mediatek.com>
description: |+
PCIe Gen3 MAC controller for MediaTek SoCs, it supports Gen3 speed
and compatible with Gen2, Gen1 speed.
This PCIe controller supports up to 256 MSI vectors, the MSI hardware
block diagram is as follows:
+-----+
| GIC |
+-----+
^
|
port->irq
|
+-+-+-+-+-+-+-+-+
|0|1|2|3|4|5|6|7| (PCIe intc)
+-+-+-+-+-+-+-+-+
^ ^ ^
| | ... |
+-------+ +------+ +-----------+
| | |
+-+-+---+--+--+ +-+-+---+--+--+ +-+-+---+--+--+
|0|1|...|30|31| |0|1|...|30|31| |0|1|...|30|31| (MSI sets)
+-+-+---+--+--+ +-+-+---+--+--+ +-+-+---+--+--+
^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
| | | | | | | | | | | | (MSI vectors)
| | | | | | | | | | | |
(MSI SET0) (MSI SET1) ... (MSI SET7)
With 256 MSI vectors supported, the MSI vectors are composed of 8 sets,
each set has its own address for MSI message, and supports 32 MSI vectors
to generate interrupt.
allOf:
- $ref: /schemas/pci/pci-bus.yaml#
properties:
compatible:
const: mediatek,mt8192-pcie
reg:
maxItems: 1
reg-names:
items:
- const: pcie-mac
interrupts:
maxItems: 1
ranges:
minItems: 1
maxItems: 8
resets:
minItems: 1
maxItems: 2
reset-names:
minItems: 1
items:
- const: phy
- const: mac
clocks:
maxItems: 6
clock-names:
items:
- const: pl_250m
- const: tl_26m
- const: tl_96m
- const: tl_32k
- const: peri_26m
- const: top_133m
assigned-clocks:
maxItems: 1
assigned-clock-parents:
maxItems: 1
phys:
maxItems: 1
'#interrupt-cells':
const: 1
interrupt-controller:
description: Interrupt controller node for handling legacy PCI interrupts.
type: object
properties:
'#address-cells':
const: 0
'#interrupt-cells':
const: 1
interrupt-controller: true
required:
- '#address-cells'
- '#interrupt-cells'
- interrupt-controller
additionalProperties: false
required:
- compatible
- reg
- reg-names
- interrupts
- ranges
- clocks
- '#interrupt-cells'
- interrupt-controller
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/interrupt-controller/irq.h>
bus {
#address-cells = <2>;
#size-cells = <2>;
pcie: pcie@11230000 {
compatible = "mediatek,mt8192-pcie";
device_type = "pci";
#address-cells = <3>;
#size-cells = <2>;
reg = <0x00 0x11230000 0x00 0x4000>;
reg-names = "pcie-mac";
interrupts = <GIC_SPI 251 IRQ_TYPE_LEVEL_HIGH 0>;
bus-range = <0x00 0xff>;
ranges = <0x82000000 0x00 0x12000000 0x00
0x12000000 0x00 0x1000000>;
clocks = <&infracfg 44>,
<&infracfg 40>,
<&infracfg 43>,
<&infracfg 97>,
<&infracfg 99>,
<&infracfg 111>;
clock-names = "pl_250m", "tl_26m", "tl_96m",
"tl_32k", "peri_26m", "top_133m";
assigned-clocks = <&topckgen 50>;
assigned-clock-parents = <&topckgen 91>;
phys = <&pciephy>;
phy-names = "pcie-phy";
resets = <&infracfg_rst 2>,
<&infracfg_rst 3>;
reset-names = "phy", "mac";
#interrupt-cells = <1>;
interrupt-map-mask = <0 0 0 0x7>;
interrupt-map = <0 0 0 1 &pcie_intc 0>,
<0 0 0 2 &pcie_intc 1>,
<0 0 0 3 &pcie_intc 2>,
<0 0 0 4 &pcie_intc 3>;
pcie_intc: interrupt-controller {
#address-cells = <0>;
#interrupt-cells = <1>;
interrupt-controller;
};
};
};
|
