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