vexpress-sysreg.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/arm/vexpress-sysreg.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: ARM Versatile Express system registers bindings
    8 
    9 maintainers:
   10   - Andre Przywara <andre.przywara@arm.com>
   11 
   12 description:
   13   This is a system control registers block, providing multiple low level
   14   platform functions like board detection and identification, software
   15   interrupt generation, MMC and NOR Flash control, etc.
   16 
   17 properties:
   18   compatible:
   19     const: arm,vexpress-sysreg
   20 
   21   reg:
   22     maxItems: 1
   23 
   24   "#address-cells":
   25     const: 1
   26 
   27   "#size-cells":
   28     const: 1
   29 
   30   ranges: true
   31 
   32   gpio-controller:
   33     deprecated: true
   34 
   35   "#gpio-cells":
   36     deprecated: true
   37     const: 2
   38 
   39 additionalProperties: false
   40 
   41 patternProperties:
   42   '^gpio@[0-9a-f]+$':
   43     type: object
   44     additionalProperties: false
   45     description:
   46       GPIO children
   47 
   48     properties:
   49       compatible:
   50         enum:
   51           - arm,vexpress-sysreg,sys_led
   52           - arm,vexpress-sysreg,sys_mci
   53           - arm,vexpress-sysreg,sys_flash
   54 
   55       gpio-controller: true
   56 
   57       "#gpio-cells":
   58         const: 2
   59         description: |
   60           The first cell is the function number:
   61           for sys_led : 0..7 = LED 0..7
   62           for sys_mci : 0 = MMC CARDIN, 1 = MMC WPROT
   63           for sys_flash : 0 = NOR FLASH WPn
   64           The second cell can take standard GPIO flags.
   65 
   66       reg:
   67         maxItems: 1
   68 
   69     required:
   70       - compatible
   71       - reg
   72       - gpio-controller
   73       - "#gpio-cells"
   74 
   75 required:
   76   - compatible
   77   - reg
   78 
   79 examples:
   80   - |
   81     sysreg@0 {
   82         compatible = "arm,vexpress-sysreg";
   83         reg = <0x00000 0x1000>;
   84         #address-cells = <1>;
   85         #size-cells = <1>;
   86         ranges = <0 0 0x1000>;
   87 
   88         v2m_led_gpios: gpio@8 {
   89             compatible = "arm,vexpress-sysreg,sys_led";
   90             reg = <0x008 4>;
   91             gpio-controller;
   92             #gpio-cells = <2>;
   93         };
   94     };
   95 
   96 ...

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sys/contrib/device-tree/Bindings/arm/vexpress-sysreg.yaml