xref: /linux/Documentation/devicetree/bindings/iio/light/capella,cm3605.yaml (revision 69bfec7548f4c1595bac0e3ddfc0458a5af31f4c) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/iio/light/capella,cm3605.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title:
8  Capella Microsystems CM3605 Ambient Light and Short Distance Proximity Sensor
9
10maintainers:
11  - Linus Walleij <linus.walleij@linaro.org>
12  - Kevin Tsai <ktsai@capellamicro.com>
13
14description: |
15  The CM3605 is an entirely analog part. However, it requires quite a bit of
16  software logic to interface a host operating system.
17
18  This ALS and proximity sensor was one of the very first deployed in mobile
19  handsets, notably it is used in the very first Nexus One Android phone from
20  2010.
21
22properties:
23  compatible:
24    const: capella,cm3605
25
26  aset-gpios:
27    maxItems: 1
28    description:
29      ASET line (drive low to activate the ALS, should be flagged
30      GPIO_ACTIVE_LOW)
31
32  interrupts:
33    maxItems: 1
34    description:
35      Connected to the POUT (proximity sensor out) line. The edge
36      detection must be set to IRQ_TYPE_EDGE_BOTH so as to detect
37      movements toward and away from the proximity sensor.
38
39  io-channels:
40    maxItems: 1
41    description:
42      ADC channel used for converting the voltage from AOUT to a digital
43      representation.
44
45  io-channel-names:
46    const: aout
47
48  vdd-supply: true
49
50  capella,aset-resistance-ohms:
51    enum: [50000, 100000, 300000, 600000]
52    description: >
53      Sensitivity calibration resistance. Note that calibration curves
54      are only provided for specific allowed values. Default: 100 kOhms.
55
56required:
57  - compatible
58  - aset-gpios
59  - interrupts
60  - io-channels
61  - io-channel-names
62
63additionalProperties: false
64
65examples:
66  - |
67    #include <dt-bindings/gpio/gpio.h>
68    #include <dt-bindings/interrupt-controller/irq.h>
69    light-sensor {
70        compatible = "capella,cm3605";
71        vdd-supply = <&foo_reg>;
72        aset-gpios = <&foo_gpio 1 GPIO_ACTIVE_LOW>;
73        capella,aset-resistance-ohms = <100000>;
74        interrupts = <1 IRQ_TYPE_EDGE_BOTH>;
75        io-channels = <&adc 0x01>;
76        io-channel-names = "aout";
77    };
78...
79