0001 # SPDX-License-Identifier: GPL-2.0
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/iio/adc/samsung,exynos-adc.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Samsung Exynos Analog to Digital Converter (ADC)
0008
0009 maintainers:
0010 - Krzysztof Kozlowski <krzk@kernel.org>
0011
0012 properties:
0013 compatible:
0014 enum:
0015 - samsung,exynos-adc-v1 # Exynos5250
0016 - samsung,exynos-adc-v2
0017 - samsung,exynos3250-adc
0018 - samsung,exynos4212-adc # Exynos4212 and Exynos4412
0019 - samsung,exynos7-adc
0020 - samsung,s3c2410-adc
0021 - samsung,s3c2416-adc
0022 - samsung,s3c2440-adc
0023 - samsung,s3c2443-adc
0024 - samsung,s3c6410-adc
0025 - samsung,s5pv210-adc
0026
0027 reg:
0028 maxItems: 1
0029
0030 clocks:
0031 description:
0032 Phandle to ADC bus clock. For Exynos3250 additional clock is needed.
0033 minItems: 1
0034 maxItems: 2
0035
0036 clock-names:
0037 description:
0038 Must contain clock names (adc, sclk) matching phandles in clocks
0039 property.
0040 minItems: 1
0041 maxItems: 2
0042
0043 interrupts:
0044 description:
0045 ADC interrupt followed by optional touchscreen interrupt.
0046 minItems: 1
0047 maxItems: 2
0048
0049 "#io-channel-cells":
0050 const: 1
0051
0052 vdd-supply: true
0053
0054 samsung,syscon-phandle:
0055 $ref: '/schemas/types.yaml#/definitions/phandle'
0056 description:
0057 Phandle to the PMU system controller node (to access the ADC_PHY
0058 register on Exynos3250/4x12/5250/5420/5800).
0059
0060 has-touchscreen:
0061 description:
0062 If present, indicates that a touchscreen is connected and usable.
0063 type: boolean
0064
0065 required:
0066 - compatible
0067 - reg
0068 - clocks
0069 - clock-names
0070 - interrupts
0071 - "#io-channel-cells"
0072 - vdd-supply
0073
0074 additionalProperties:
0075 type: object
0076
0077 allOf:
0078 - if:
0079 properties:
0080 compatible:
0081 contains:
0082 enum:
0083 - samsung,exynos-adc-v1
0084 - samsung,exynos-adc-v2
0085 - samsung,exynos3250-adc
0086 - samsung,exynos4212-adc
0087 then:
0088 required:
0089 - samsung,syscon-phandle
0090
0091 - if:
0092 properties:
0093 compatible:
0094 contains:
0095 enum:
0096 - samsung,exynos3250-adc
0097 then:
0098 properties:
0099 clocks:
0100 minItems: 2
0101 maxItems: 2
0102 clock-names:
0103 items:
0104 - const: adc
0105 - const: sclk
0106 else:
0107 properties:
0108 clocks:
0109 minItems: 1
0110 maxItems: 1
0111 clock-names:
0112 items:
0113 - const: adc
0114
0115 - if:
0116 required:
0117 - has-touchscreen
0118 then:
0119 properties:
0120 interrupts:
0121 minItems: 2
0122 maxItems: 2
0123
0124 examples:
0125 - |
0126 adc: adc@12d10000 {
0127 compatible = "samsung,exynos-adc-v1";
0128 reg = <0x12d10000 0x100>;
0129 interrupts = <0 106 0>;
0130 #io-channel-cells = <1>;
0131
0132 clocks = <&clock 303>;
0133 clock-names = "adc";
0134
0135 vdd-supply = <&buck5_reg>;
0136 samsung,syscon-phandle = <&pmu_system_controller>;
0137
0138 /* NTC thermistor is a hwmon device */
0139 thermistor {
0140 compatible = "murata,ncp15wb473";
0141 pullup-uv = <1800000>;
0142 pullup-ohm = <47000>;
0143 pulldown-ohm = <0>;
0144 io-channels = <&adc 4>;
0145 };
0146 };
0147
0148 - |
0149 #include <dt-bindings/clock/exynos3250.h>
0150
0151 adc@126c0000 {
0152 compatible = "samsung,exynos3250-adc";
0153 reg = <0x126C0000 0x100>;
0154 interrupts = <0 137 0>;
0155 #io-channel-cells = <1>;
0156
0157 clocks = <&cmu CLK_TSADC>,
0158 <&cmu CLK_SCLK_TSADC>;
0159 clock-names = "adc", "sclk";
0160
0161 vdd-supply = <&buck5_reg>;
0162 samsung,syscon-phandle = <&pmu_system_controller>;
0163 };
