cfda05c1dd
It is valid for arm,vexpress-sysreg to have no child nodes when either the deprecated binding without child nodes is used or a platform has no GPIOs. If there are no child nodes, then "#address-cells" and "#size-cells" should not be required. However, "reg" should be present in all cases, so let's add it now. Cc: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20220613171809.3928949-2-robh@kernel.org
97 lines
1.9 KiB
YAML
97 lines
1.9 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/arm/vexpress-sysreg.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: ARM Versatile Express system registers bindings
|
|
|
|
maintainers:
|
|
- Andre Przywara <andre.przywara@arm.com>
|
|
|
|
description:
|
|
This is a system control registers block, providing multiple low level
|
|
platform functions like board detection and identification, software
|
|
interrupt generation, MMC and NOR Flash control, etc.
|
|
|
|
properties:
|
|
compatible:
|
|
const: arm,vexpress-sysreg
|
|
|
|
reg:
|
|
maxItems: 1
|
|
|
|
"#address-cells":
|
|
const: 1
|
|
|
|
"#size-cells":
|
|
const: 1
|
|
|
|
ranges: true
|
|
|
|
gpio-controller:
|
|
deprecated: true
|
|
|
|
"#gpio-cells":
|
|
deprecated: true
|
|
const: 2
|
|
|
|
additionalProperties: false
|
|
|
|
patternProperties:
|
|
'^gpio@[0-9a-f]+$':
|
|
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
|
|
- reg
|
|
|
|
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>;
|
|
};
|
|
};
|
|
|
|
...
|