1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 # Copyright 2019-2020 Artur Rojek
3 %YAML 1.2
4 ---
5 $id: http://devicetree.org/schemas/iio/adc/ingenic,adc.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7
8 title: Ingenic JZ47xx ADC controller IIO
9
10 maintainers:
11 - Artur Rojek <contact@artur-rojek.eu>
12
13 description: >
14 Industrial I/O subsystem bindings for ADC controller found in
15 Ingenic JZ47xx SoCs.
16
17 ADC clients must use the format described in
18 https://github.com/devicetree-org/dt-schema/blob/master/schemas/iio/iio-consumer.yaml,
19 giving a phandle and IIO specifier pair ("io-channels") to the ADC controller.
20
21 properties:
22 compatible:
23 enum:
24 - ingenic,jz4725b-adc
25 - ingenic,jz4740-adc
26 - ingenic,jz4760-adc
27 - ingenic,jz4760b-adc
28 - ingenic,jz4770-adc
29
30 '#io-channel-cells':
31 const: 1
32 description:
33 Must be set to <1> to indicate channels are selected by index.
34
35 reg:
36 maxItems: 1
37
38 clocks:
39 maxItems: 1
40
41 clock-names:
42 items:
43 - const: adc
44
45 interrupts:
46 maxItems: 1
47
48 ingenic,use-internal-divider:
49 description:
50 If present, battery voltage is read from the VBAT_IR pin, which has an
51 internal 1/4 divider. If absent, it is read through the VBAT_ER pin,
52 which does not have such a divider.
53 type: boolean
54
55 if:
56 not:
57 properties:
58 compatible:
59 contains:
60 const: ingenic,jz4760b-adc
61 then:
62 properties:
63 ingenic,use-internal-divider: false
64
65 required:
66 - compatible
67 - '#io-channel-cells'
68 - reg
69 - clocks
70 - clock-names
71 - interrupts
72
73 additionalProperties: false
74
75 examples:
76 - |
77 #include <dt-bindings/clock/ingenic,jz4740-cgu.h>
78 #include <dt-bindings/iio/adc/ingenic,adc.h>
79
80 adc@10070000 {
81 compatible = "ingenic,jz4740-adc";
82 #io-channel-cells = <1>;
83
84 reg = <0x10070000 0x30>;
85
86 clocks = <&cgu JZ4740_CLK_ADC>;
87 clock-names = "adc";
88
89 interrupt-parent = <&intc>;
90 interrupts = <18>;
91 };
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