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     1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/bus/allwinner,sun50i-a64-de2.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Allwinner A64 Display Engine Bus Device Tree Bindings
    8 
    9 maintainers:
   10   - Chen-Yu Tsai <wens@csie.org>
   11   - Maxime Ripard <mripard@kernel.org>
   12 
   13 properties:
   14   $nodename:
   15     pattern: "^bus(@[0-9a-f]+)?$"
   16 
   17   "#address-cells":
   18     const: 1
   19 
   20   "#size-cells":
   21     const: 1
   22 
   23   compatible:
   24     oneOf:
   25       - const: allwinner,sun50i-a64-de2
   26       - items:
   27           - const: allwinner,sun50i-h6-de3
   28           - const: allwinner,sun50i-a64-de2
   29 
   30   reg:
   31     maxItems: 1
   32 
   33   allwinner,sram:
   34     description:
   35       The SRAM that needs to be claimed to access the display engine
   36       bus.
   37     $ref: /schemas/types.yaml#/definitions/phandle-array
   38     items:
   39       - items:
   40           - description: phandle to SRAM
   41           - description: register value for device
   42 
   43   ranges: true
   44 
   45 patternProperties:
   46   # All other properties should be child nodes with unit-address and 'reg'
   47   "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-fA-F]+$":
   48     type: object
   49     properties:
   50       reg:
   51         maxItems: 1
   52 
   53     required:
   54       - reg
   55 
   56 required:
   57   - compatible
   58   - reg
   59   - "#address-cells"
   60   - "#size-cells"
   61   - ranges
   62   - allwinner,sram
   63 
   64 additionalProperties: false
   65 
   66 examples:
   67   - |
   68     bus@1000000 {
   69         compatible = "allwinner,sun50i-a64-de2";
   70         reg = <0x1000000 0x400000>;
   71         allwinner,sram = <&de2_sram 1>;
   72         #address-cells = <1>;
   73         #size-cells = <1>;
   74         ranges = <0 0x1000000 0x400000>;
   75 
   76         display_clocks: clock@0 {
   77             compatible = "allwinner,sun50i-a64-de2-clk";
   78             reg = <0x0 0x100000>;
   79             clocks = <&ccu 52>, <&ccu 99>;
   80             clock-names = "bus", "mod";
   81             resets = <&ccu 30>;
   82             #clock-cells = <1>;
   83             #reset-cells = <1>;
   84         };
   85     };
   86 
   87 ...
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