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Message-Id: <1442391252-7368-3-git-send-email-adriana.reus@intel.com>
Date: Wed, 16 Sep 2015 11:14:12 +0300
From: Adriana Reus <adriana.reus@...el.com>
To: robherring2@...il.com, jic23@...nel.org
Cc: pmeerw@...erw.net, daniel.baluta@...el.com,
linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, robh+dt@...nel.org, pawel.moll@....com,
mark.rutland@....com, ijc+devicetree@...lion.org.uk,
galak@...eaurora.org, Adriana Reus <adriana.reus@...el.com>
Subject: [v7 PATCH 2/2] 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 <adriana.reus@...el.com>
---
Changes since v6:
* Added some aditional clarifications on the optional
properties, as suggested by Rob.
.../devicetree/bindings/iio/light/us5182d.txt | 34 ++++++++++++++++++++++
.../devicetree/bindings/vendor-prefixes.txt | 1 +
2 files changed, 35 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/light/us5182d.txt
diff --git a/Documentation/devicetree/bindings/iio/light/us5182d.txt b/Documentation/devicetree/bindings/iio/light/us5182d.txt
new file mode 100644
index 0000000..6f0a530
--- /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 341695b..85ba915 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -213,6 +213,7 @@ 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.
--
1.9.1
--
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