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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/arm/vexpress-sysreg.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ARM Versatile Express system registers bindings
maintainers:
- Andre Przywara <andre.przywara@arm.com>
description:
This is a system control registers block, providing multiple low level
platform functions like board detection and identification, software
interrupt generation, MMC and NOR Flash control, etc.
properties:
compatible:
const: arm,vexpress-sysreg
reg:
maxItems: 1
"#address-cells":
const: 1
"#size-cells":
const: 1
ranges: true
additionalProperties: false
patternProperties:
'^gpio@[0-9a-f]+$':
type: object
additionalProperties: false
description:
GPIO children
properties:
compatible:
enum:
- arm,vexpress-sysreg,sys_led
- arm,vexpress-sysreg,sys_mci
- arm,vexpress-sysreg,sys_flash
gpio-controller: true
"#gpio-cells":
const: 2
description: |
The first cell is the function number:
for sys_led : 0..7 = LED 0..7
for sys_mci : 0 = MMC CARDIN, 1 = MMC WPROT
for sys_flash : 0 = NOR FLASH WPn
The second cell can take standard GPIO flags.
reg:
maxItems: 1
required:
- compatible
- reg
- gpio-controller
- "#gpio-cells"
required:
- compatible
- "#address-cells"
- "#size-cells"
examples:
- |
sysreg@0 {
compatible = "arm,vexpress-sysreg";
reg = <0x00000 0x1000>;
#address-cells = <1>;
#size-cells = <1>;
ranges = <0 0 0x1000>;
v2m_led_gpios: gpio@8 {
compatible = "arm,vexpress-sysreg,sys_led";
reg = <0x008 4>;
gpio-controller;
#gpio-cells = <2>;
};
};
...
|
