1* UPISEMI us5182d I2C ALS and Proximity sensor
2
3Required properties:
4- compatible: must be "upisemi,usd5182"
5- reg: the I2C address of the device
6
7Optional properties:
8- upisemi,glass-coef: glass attenuation factor - compensation factor of
9                      resolution 1000 for material transmittance.
10
11- upisemi,dark-ths: array of 8 elements containing 16-bit thresholds (adc
12                    counts) corresponding to every scale.
13
14- upisemi,upper-dark-gain: 8-bit dark gain compensation factor(4 int and 4
15                           fractional bits - Q4.4) applied when light > threshold
16
17- upisemi,lower-dark-gain: 8-bit dark gain compensation factor(4 int and 4
18                           fractional bits - Q4.4) applied when light < threshold
19
20- upisemi,continuous: This chip has two power modes: one-shot (chip takes one
21                      measurement and then shuts itself down) and continuous (
22                      chip takes continuous measurements). The one-shot mode is
23                      more power-friendly but the continuous mode may be more
24                      reliable. If this property is specified the continuous
25                      mode will be used instead of the default one-shot one for
26                      raw reads.
27
28If the optional properties are not specified these factors will default to the
29values in the below example.
30The glass-coef defaults to no compensation for the covering material.
31The threshold array defaults to experimental values that work with US5182D
32sensor on evaluation board - roughly between 12-32 lux.
33There will be no dark-gain compensation by default when ALS > thresh
34(0 * dark-gain), and a 1.35 compensation factor when ALS < thresh.
35
36Example:
37
38    usd5182@39 {
39                compatible = "upisemi,usd5182";
40                reg = <0x39>;
41                upisemi,glass-coef = < 1000 >;
42                upisemi,dark-ths = /bits/ 16 <170 200 512 512 800 2000 4000 8000>;
43                upisemi,upper-dark-gain = /bits/ 8 <0x00>;
44                upisemi,lower-dark-gain = /bits/ 8 <0x16>;
45    };
46