| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/arm/vexpress-sysreg.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: ARM Versatile Express system registers |
| |
| maintainers: |
| - Andre Przywara <andre.przywara@arm.com> |
| |
| description: |
| This is a system control registers block, providing multiple low level |
| platform functions like board detection and identification, software |
| interrupt generation, MMC and NOR Flash control, etc. |
| |
| properties: |
| compatible: |
| const: arm,vexpress-sysreg |
| |
| reg: |
| maxItems: 1 |
| |
| "#address-cells": |
| const: 1 |
| |
| "#size-cells": |
| const: 1 |
| |
| ranges: true |
| |
| gpio-controller: |
| deprecated: true |
| |
| "#gpio-cells": |
| deprecated: true |
| const: 2 |
| |
| additionalProperties: false |
| |
| patternProperties: |
| '^gpio@[0-9a-f]+$': |
| 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>; |
| }; |
| }; |
| |
| ... |
