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