0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/arm/vexpress-sysreg.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: ARM Versatile Express system registers bindings
0008
0009 maintainers:
0010 - Andre Przywara <andre.przywara@arm.com>
0011
0012 description:
0013 This is a system control registers block, providing multiple low level
0014 platform functions like board detection and identification, software
0015 interrupt generation, MMC and NOR Flash control, etc.
0016
0017 properties:
0018 compatible:
0019 const: arm,vexpress-sysreg
0020
0021 reg:
0022 maxItems: 1
0023
0024 "#address-cells":
0025 const: 1
0026
0027 "#size-cells":
0028 const: 1
0029
0030 ranges: true
0031
0032 gpio-controller:
0033 deprecated: true
0034
0035 "#gpio-cells":
0036 deprecated: true
0037 const: 2
0038
0039 additionalProperties: false
0040
0041 patternProperties:
0042 '^gpio@[0-9a-f]+$':
0043 type: object
0044 additionalProperties: false
0045 description:
0046 GPIO children
0047
0048 properties:
0049 compatible:
0050 enum:
0051 - arm,vexpress-sysreg,sys_led
0052 - arm,vexpress-sysreg,sys_mci
0053 - arm,vexpress-sysreg,sys_flash
0054
0055 gpio-controller: true
0056
0057 "#gpio-cells":
0058 const: 2
0059 description: |
0060 The first cell is the function number:
0061 for sys_led : 0..7 = LED 0..7
0062 for sys_mci : 0 = MMC CARDIN, 1 = MMC WPROT
0063 for sys_flash : 0 = NOR FLASH WPn
0064 The second cell can take standard GPIO flags.
0065
0066 reg:
0067 maxItems: 1
0068
0069 required:
0070 - compatible
0071 - reg
0072 - gpio-controller
0073 - "#gpio-cells"
0074
0075 required:
0076 - compatible
0077 - reg
0078
0079 examples:
0080 - |
0081 sysreg@0 {
0082 compatible = "arm,vexpress-sysreg";
0083 reg = <0x00000 0x1000>;
0084 #address-cells = <1>;
0085 #size-cells = <1>;
0086 ranges = <0 0 0x1000>;
0087
0088 v2m_led_gpios: gpio@8 {
0089 compatible = "arm,vexpress-sysreg,sys_led";
0090 reg = <0x008 4>;
0091 gpio-controller;
0092 #gpio-cells = <2>;
0093 };
0094 };
0095
0096 ...
