Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/rtc/allwinner,sun6i-a31-rtc.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Allwinner A31 RTC Device Tree Bindings
   8
   9 maintainers:
  10   - Chen-Yu Tsai <wens@csie.org>
  11   - Maxime Ripard <mripard@kernel.org>
  12
  13 properties:
  14   "#clock-cells":
  15     const: 1
  16
  17   compatible:
  18     oneOf:
  19       - const: allwinner,sun6i-a31-rtc
  20       - const: allwinner,sun8i-a23-rtc
  21       - const: allwinner,sun8i-h3-rtc
  22       - const: allwinner,sun8i-r40-rtc
  23       - const: allwinner,sun8i-v3-rtc
  24       - const: allwinner,sun50i-h5-rtc
  25       - items:
  26           - const: allwinner,sun50i-a64-rtc
  27           - const: allwinner,sun8i-h3-rtc
  28       - const: allwinner,sun50i-h6-rtc
  29
  30   reg:
  31     maxItems: 1
  32
  33   interrupts:
  34     minItems: 1
  35     maxItems: 2
  36     items:
  37       - description: RTC Alarm 0
  38       - description: RTC Alarm 1
  39
  40   clocks:
  41     maxItems: 1
  42
  43   clock-output-names:
  44     minItems: 1
  45     maxItems: 3
  46     description:
  47       The RTC provides up to three clocks
  48         - the Low Frequency Oscillator or LOSC, at index 0,
  49         - the Low Frequency Oscillator External output (X32KFOUT in
  50           the datasheet), at index 1,
  51         - the Internal Oscillator, at index 2.
  52
  53 allOf:
  54   - $ref: "rtc.yaml#"
  55   - if:
  56       properties:
  57         compatible:
  58           contains:
  59             const: allwinner,sun6i-a31-rtc
  60
  61     then:
  62       properties:
  63         clock-output-names:
  64           minItems: 1
  65           maxItems: 1
  66
  67   - if:
  68       properties:
  69         compatible:
  70           contains:
  71             enum:
  72               - allwinner,sun8i-a23-rtc
  73               - allwinner,sun8i-r40-rtc
  74               - allwinner,sun8i-v3-rtc
  75
  76     then:
  77       properties:
  78         clock-output-names:
  79           minItems: 2
  80           maxItems: 2
  81
  82   - if:
  83       properties:
  84         compatible:
  85           contains:
  86             enum:
  87               - allwinner,sun8i-h3-rtc
  88               - allwinner,sun50i-h5-rtc
  89
  90     then:
  91       properties:
  92         clock-output-names:
  93           minItems: 3
  94           maxItems: 3
  95
  96   - if:
  97       properties:
  98         compatible:
  99           contains:
 100             const: allwinner,sun50i-h6-rtc
 101
 102     then:
 103       properties:
 104         clock-output-names:
 105           minItems: 3
 106           maxItems: 3
 107
 108   - if:
 109       properties:
 110         compatible:
 111           contains:
 112             const: allwinner,sun8i-r40-rtc
 113
 114     then:
 115       properties:
 116         interrupts:
 117           minItems: 1
 118           maxItems: 1
 119
 120     else:
 121       properties:
 122         interrupts:
 123           minItems: 2
 124           maxItems: 2
 125
 126 required:
 127   - "#clock-cells"
 128   - compatible
 129   - reg
 130   - interrupts
 131   - clocks
 132   - clock-output-names
 133
 134 additionalProperties: false
 135
 136 examples:
 137   - |
 138     rtc: rtc@1f00000 {
 139         compatible = "allwinner,sun6i-a31-rtc";
 140         reg = <0x01f00000 0x400>;
 141         interrupts = <0 40 4>, <0 41 4>;
 142         clock-output-names = "osc32k";
 143         clocks = <&ext_osc32k>;
 144         #clock-cells = <1>;
 145     };
 146
 147 ...