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