0001 # SPDX-License-Identifier: GPL-2.0
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/rtc/allwinner,sun6i-a31-rtc.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Allwinner A31 RTC Device Tree Bindings
0008
0009 maintainers:
0010 - Chen-Yu Tsai <wens@csie.org>
0011 - Maxime Ripard <mripard@kernel.org>
0012
0013 properties:
0014 "#clock-cells":
0015 const: 1
0016
0017 compatible:
0018 oneOf:
0019 - enum:
0020 - allwinner,sun6i-a31-rtc
0021 - allwinner,sun8i-a23-rtc
0022 - allwinner,sun8i-h3-rtc
0023 - allwinner,sun8i-r40-rtc
0024 - allwinner,sun8i-v3-rtc
0025 - allwinner,sun50i-h5-rtc
0026 - allwinner,sun50i-h6-rtc
0027 - allwinner,sun50i-h616-rtc
0028 - allwinner,sun50i-r329-rtc
0029 - items:
0030 - const: allwinner,sun50i-a64-rtc
0031 - const: allwinner,sun8i-h3-rtc
0032 - items:
0033 - const: allwinner,sun20i-d1-rtc
0034 - const: allwinner,sun50i-r329-rtc
0035
0036 reg:
0037 maxItems: 1
0038
0039 interrupts:
0040 minItems: 1
0041 items:
0042 - description: RTC Alarm 0
0043 - description: RTC Alarm 1
0044
0045 clocks:
0046 minItems: 1
0047 maxItems: 4
0048
0049 clock-names:
0050 minItems: 1
0051 maxItems: 4
0052
0053 clock-output-names:
0054 minItems: 1
0055 maxItems: 3
0056 description:
0057 The RTC provides up to three clocks
0058 - the Low Frequency Oscillator or LOSC, at index 0,
0059 - the Low Frequency Oscillator External output (X32KFOUT in
0060 the datasheet), at index 1,
0061 - the Internal Oscillator, at index 2.
0062
0063 allOf:
0064 - $ref: "rtc.yaml#"
0065 - if:
0066 properties:
0067 compatible:
0068 contains:
0069 const: allwinner,sun6i-a31-rtc
0070
0071 then:
0072 properties:
0073 clock-output-names:
0074 maxItems: 1
0075
0076 - if:
0077 properties:
0078 compatible:
0079 contains:
0080 enum:
0081 - allwinner,sun8i-a23-rtc
0082 - allwinner,sun8i-r40-rtc
0083 - allwinner,sun8i-v3-rtc
0084
0085 then:
0086 properties:
0087 clock-output-names:
0088 minItems: 2
0089 maxItems: 2
0090
0091 - if:
0092 properties:
0093 compatible:
0094 contains:
0095 enum:
0096 - allwinner,sun8i-h3-rtc
0097 - allwinner,sun50i-h5-rtc
0098 - allwinner,sun50i-h6-rtc
0099
0100 then:
0101 properties:
0102 clock-output-names:
0103 minItems: 3
0104
0105 - if:
0106 properties:
0107 compatible:
0108 contains:
0109 const: allwinner,sun50i-h616-rtc
0110
0111 then:
0112 properties:
0113 clocks:
0114 items:
0115 - description: Bus clock for register access
0116 - description: 24 MHz oscillator
0117 - description: 32 kHz clock from the CCU
0118
0119 clock-names:
0120 items:
0121 - const: bus
0122 - const: hosc
0123 - const: pll-32k
0124
0125 required:
0126 - clocks
0127 - clock-names
0128
0129 - if:
0130 properties:
0131 compatible:
0132 contains:
0133 const: allwinner,sun50i-r329-rtc
0134
0135 then:
0136 properties:
0137 clocks:
0138 minItems: 3
0139 items:
0140 - description: Bus clock for register access
0141 - description: 24 MHz oscillator
0142 - description: AHB parent for internal SPI clock
0143 - description: External 32768 Hz oscillator
0144
0145 clock-names:
0146 minItems: 3
0147 items:
0148 - const: bus
0149 - const: hosc
0150 - const: ahb
0151 - const: ext-osc32k
0152
0153 required:
0154 - clocks
0155 - clock-names
0156
0157 - if:
0158 properties:
0159 compatible:
0160 contains:
0161 enum:
0162 - allwinner,sun8i-r40-rtc
0163 - allwinner,sun50i-h616-rtc
0164 - allwinner,sun50i-r329-rtc
0165
0166 then:
0167 properties:
0168 interrupts:
0169 maxItems: 1
0170
0171 else:
0172 properties:
0173 interrupts:
0174 minItems: 2
0175
0176 required:
0177 - "#clock-cells"
0178 - compatible
0179 - reg
0180 - interrupts
0181
0182 additionalProperties: false
0183
0184 examples:
0185 - |
0186 rtc: rtc@1f00000 {
0187 compatible = "allwinner,sun6i-a31-rtc";
0188 reg = <0x01f00000 0x400>;
0189 interrupts = <0 40 4>, <0 41 4>;
0190 clock-output-names = "osc32k";
0191 clocks = <&ext_osc32k>;
0192 #clock-cells = <1>;
0193 };
0194
0195 ...
