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- * UPISEMI us5182d I2C ALS and Proximity sensor
- Required properties:
- - compatible: must be "upisemi,usd5182"
- - reg: the I2C address of the device
- Optional properties:
- - upisemi,glass-coef: glass attenuation factor - compensation factor of
- resolution 1000 for material transmittance.
- - upisemi,dark-ths: array of 8 elements containing 16-bit thresholds (adc
- counts) corresponding to every scale.
- - upisemi,upper-dark-gain: 8-bit dark gain compensation factor(4 int and 4
- fractional bits - Q4.4) applied when light > threshold
- - upisemi,lower-dark-gain: 8-bit dark gain compensation factor(4 int and 4
- fractional bits - Q4.4) applied when light < threshold
- - upisemi,continuous: This chip has two power modes: one-shot (chip takes one
- measurement and then shuts itself down) and continuous (
- chip takes continuous measurements). The one-shot mode is
- more power-friendly but the continuous mode may be more
- reliable. If this property is specified the continuous
- mode will be used instead of the default one-shot one for
- raw reads.
- If the optional properties are not specified these factors will default to the
- values in the below example.
- The glass-coef defaults to no compensation for the covering material.
- The threshold array defaults to experimental values that work with US5182D
- sensor on evaluation board - roughly between 12-32 lux.
- There will be no dark-gain compensation by default when ALS > thresh
- (0 * dark-gain), and a 1.35 compensation factor when ALS < thresh.
- Example:
- usd5182@39 {
- compatible = "upisemi,usd5182";
- reg = <0x39>;
- upisemi,glass-coef = < 1000 >;
- upisemi,dark-ths = /bits/ 16 <170 200 512 512 800 2000 4000 8000>;
- upisemi,upper-dark-gain = /bits/ 8 <0x00>;
- upisemi,lower-dark-gain = /bits/ 8 <0x16>;
- };
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