1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/fsl,imx25-gcq.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Freescale ADC GCQ device
8
9 description:
10 This is a generic conversion queue device that can convert any of the
11 analog inputs using the ADC unit of the i.MX25.
12
13 maintainers:
14 - Jonathan Cameron <jic23@kernel.org>
15
16 properties:
17 compatible:
18 const: fsl,imx25-gcq
19
20 reg:
21 maxItems: 1
22
23 interrupts:
24 maxItems: 1
25
26 vref-ext-supply:
27 description:
28 The regulator supplying the ADC reference voltage.
29 Required when at least one subnode uses the this reference.
30
31 vref-xp-supply:
32 description:
33 The regulator supplying the ADC reference voltage on pin XP.
34 Required when at least one subnode uses this reference.
35
36 vref-yp-supply:
37 description:
38 The regulator supplying the ADC reference voltage on pin YP.
39 Required when at least one subnode uses this reference.
40
41 "#io-channel-cells":
42 const: 1
43
44 "#address-cells":
45 const: 1
46
47 "#size-cells":
48 const: 0
49
50 required:
51 - compatible
52 - reg
53 - interrupts
54 - "#address-cells"
55 - "#size-cells"
56
57 patternProperties:
58 "[a-z][a-z0-9]+@[0-9a-f]+$":
59 type: object
60 description:
61 Child nodes used to define the reference voltages used for each channel
62
63 properties:
64 reg:
65 description: |
66 Number of the analog input.
67 0: xp
68 1: yp
69 2: xn
70 3: yn
71 4: wiper
72 5: inaux0
73 6: inaux1
74 7: inaux2
75 items:
76 - minimum: 0
77 maximum: 7
78
79 fsl,adc-refp:
80 $ref: /schemas/types.yaml#/definitions/uint32
81 description: |
82 Specifies the positive reference input as defined in
83 <dt-bindings/iio/adc/fsl-imx25-gcq.h>
84 0: YP voltage reference
85 1: XP voltage reference
86 2: External voltage reference
87 3: Internal voltage reference (default)
88 minimum: 0
89 maximum: 3
90
91 fsl,adc-refn:
92 $ref: /schemas/types.yaml#/definitions/uint32
93 description: |
94 Specifies the negative reference input as defined in
95 <dt-bindings/iio/adc/fsl-imx25-gcq.h>
96 0: XN ground reference
97 1: YN ground reference
98 2: Internal ground reference
99 3: External ground reference (default)
100 minimum: 0
101 maximum: 3
102
103 required:
104 - reg
105
106 additionalProperties: false
107
108 additionalProperties: false
109
110 examples:
111 - |
112 #include <dt-bindings/iio/adc/fsl-imx25-gcq.h>
113 soc {
114 #address-cells = <1>;
115 #size-cells = <1>;
116 adc@50030800 {
117 compatible = "fsl,imx25-gcq";
118 reg = <0x50030800 0x60>;
119 interrupt-parent = <&tscadc>;
120 interrupts = <1>;
121 #address-cells = <1>;
122 #size-cells = <0>;
123
124 inaux@5 {
125 reg = <5>;
126 fsl,adc-refp = <MX25_ADC_REFP_INT>;
127 fsl,adc-refn = <MX25_ADC_REFN_NGND>;
128 };
129 };
130 };
131 ...
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