From: Adriana Reus Date: Wed, 16 Sep 2015 08:14:12 +0000 (+0300) Subject: devicetree: Add documentation for UPISEMI us5182d ALS and Proximity sensor X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9214185b515ed550fe67c912ca446b4524f01603;p=linux-beck.git devicetree: Add documentation for UPISEMI us5182d ALS and Proximity sensor Added entries in i2c/vendor-prefixes for the us5182d als and proximity sensor. Also added a documentation file for this sensor's properties. Signed-off-by: Adriana Reus Acked-by: Rob Herring Signed-off-by: Jonathan Cameron --- diff --git a/Documentation/devicetree/bindings/iio/light/us5182d.txt b/Documentation/devicetree/bindings/iio/light/us5182d.txt new file mode 100644 index 000000000000..6f0a530144fd --- /dev/null +++ b/Documentation/devicetree/bindings/iio/light/us5182d.txt @@ -0,0 +1,34 @@ +* 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 + +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>; + }; diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index d5915611036b..f2b1d6fe0329 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -214,6 +214,7 @@ toshiba Toshiba Corporation toumaz Toumaz tplink TP-LINK Technologies Co., Ltd. truly Truly Semiconductors Limited +upisemi uPI Semiconductor Corp. usi Universal Scientific Industrial Co., Ltd. v3 V3 Semiconductor variscite Variscite Ltd.