1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/iio/potentiometer/renesas,x9250.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Renesas X9250 quad potentiometers
8
9 maintainers:
10 - Herve Codina <herve.codina@bootlin.com>
11
12 description:
13 The Renesas X9250 integrates four digitally controlled potentiometers.
14 On each potentiometer, the X9250T has a 100 kOhms total resistance and the
15 X9250U has a 50 kOhms total resistance.
16
17 allOf:
18 - $ref: /schemas/spi/spi-peripheral-props.yaml
19
20 properties:
21 compatible:
22 enum:
23 - renesas,x9250t
24 - renesas,x9250u
25
26 reg:
27 maxItems: 1
28
29 vcc-supply:
30 description:
31 Regulator for the VCC power supply.
32
33 avp-supply:
34 description:
35 Regulator for the analog V+ power supply.
36
37 avn-supply:
38 description:
39 Regulator for the analog V- power supply.
40
41 '#io-channel-cells':
42 const: 1
43
44 spi-max-frequency:
45 maximum: 2000000
46
47 wp-gpios:
48 maxItems: 1
49 description:
50 GPIO connected to the write-protect pin.
51
52 required:
53 - compatible
54 - reg
55 - vcc-supply
56 - avp-supply
57 - avn-supply
58 - '#io-channel-cells'
59
60 unevaluatedProperties: false
61
62 examples:
63 - |
64 #include <dt-bindings/gpio/gpio.h>
65 spi {
66 #address-cells = <1>;
67 #size-cells = <0>;
68 potentiometer@0 {
69 compatible = "renesas,x9250t";
70 reg = <0>;
71 vcc-supply = <&vcc_regulator>;
72 avp-supply = <&avp_regulator>;
73 avn-supply = <&avp_regulator>;
74 wp-gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
75 spi-max-frequency = <2000000>;
76 #io-channel-cells = <1>;
77 };
78 };
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