1Capella Microsystems CM3605
2Ambient Light and Short Distance Proximity Sensor
3
4The CM3605 is an entirely analog part which however require quite a bit of
5software logic to interface a host operating system.
6
7This ALS and proximity sensor was one of the very first deployed in mobile
8handsets, notably it is used in the very first Nexus One Android phone from
92010.
10
11Required properties:
12- compatible: must be: "capella,cm3605"
13- aset-gpios: GPIO line controlling the ASET line (drive low
14  to activate the ALS, should be flagged GPIO_ACTIVE_LOW)
15- interrupts: the IRQ line (such as a GPIO) that is connected to
16  the POUT (proximity sensor out) line. The edge detection must
17  be set to IRQ_TYPE_EDGE_BOTH so as to detect movements toward
18  and away from the proximity sensor.
19- io-channels: the ADC channel used for converting the voltage from
20  AOUT to a digital representation.
21- io-channel-names: must be "aout"
22
23Optional properties:
24- vdd-supply: regulator supplying VDD power to the component.
25- capella,aset-resistance-ohms: the sensitivity calibration resistance,
26  in Ohms. Valid values are: 50000, 100000, 300000 and 600000,
27  as these are the resistance values that we are supplied with
28  calibration curves for. If not supplied, 100 kOhm will be assumed
29  but it is strongly recommended to supply this.
30
31Example:
32
33cm3605 {
34	compatible = "capella,cm3605";
35	vdd-supply = <&foo_reg>;
36	aset-gpios = <&foo_gpio 1 GPIO_ACTIVE_LOW>;
37	capella,aset-resistance-ohms = <100000>;
38	interrupts = <1 IRQ_TYPE_EDGE_BOTH>;
39	io-channels = <&adc 0x01>;
40	io-channel-names = "aout";
41};
42