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|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/interrupt-controller/loongson,liointc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Loongson Local I/O Interrupt Controller
maintainers:
- Jiaxun Yang <jiaxun.yang@flygoat.com>
description: |
This interrupt controller is found in the Loongson-3 family of chips and
Loongson-2K series chips, as the primary package interrupt controller which
can route local I/O interrupt to interrupt lines of cores.
Be aware of the following points.
1.The Loongson-2K0500 is a single core CPU;
2.The Loongson-2K0500/2K1000 has 64 device interrupt sources as inputs, so we
need to define two nodes in dts{i} to describe the "0-31" and "32-61" interrupt
sources respectively.
allOf:
- $ref: /schemas/interrupt-controller.yaml#
properties:
compatible:
enum:
- loongson,liointc-1.0
- loongson,liointc-1.0a
- loongson,liointc-2.0
reg:
minItems: 1
maxItems: 3
reg-names:
items:
- const: main
- const: isr0
- const: isr1
minItems: 2
interrupt-controller: true
interrupts:
description:
Interrupt source of the CPU interrupts.
minItems: 1
maxItems: 4
interrupt-names:
description: List of names for the parent interrupts.
items:
pattern: int[0-3]
minItems: 1
maxItems: 4
'#interrupt-cells':
const: 2
loongson,parent_int_map:
description: |
This property points how the children interrupts will be mapped into CPU
interrupt lines. Each cell refers to a parent interrupt line from 0 to 3
and each bit in the cell refers to a child interrupt from 0 to 31.
If a CPU interrupt line didn't connect with liointc, then keep its
cell with zero.
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 4
maxItems: 4
required:
- compatible
- reg
- interrupts
- interrupt-names
- interrupt-controller
- '#interrupt-cells'
- loongson,parent_int_map
unevaluatedProperties: false
if:
properties:
compatible:
contains:
enum:
- loongson,liointc-2.0
then:
properties:
reg:
minItems: 2
maxItems: 3
required:
- reg-names
else:
properties:
reg:
maxItems: 1
examples:
- |
iointc: interrupt-controller@3ff01400 {
compatible = "loongson,liointc-1.0";
reg = <0x3ff01400 0x64>;
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&cpuintc>;
interrupts = <2>, <3>;
interrupt-names = "int0", "int1";
loongson,parent_int_map = <0xf0ffffff>, /* int0 */
<0x0f000000>, /* int1 */
<0x00000000>, /* int2 */
<0x00000000>; /* int3 */
};
...
|
