| * 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>; |
| }; |
