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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
+
+ 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>;
+ };
+ };
+
+...