linux-kernel - Re: [v7 PATCH 2/2] devicetree: Add documentation for UPISEMI us5182d ALS and Proximity sensor

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Message-ID: <56005C2E.6060906@kernel.org>
Date:	Mon, 21 Sep 2015 20:36:14 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Rob Herring <robh@...nel.org>,
	Adriana Reus <adriana.reus@...el.com>
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
Subject: Re: [v7 PATCH 2/2] devicetree: Add documentation for UPISEMI us5182d
 ALS and Proximity sensor

On 21/09/15 16:02, Rob Herring wrote:
> On 09/16/2015 03:14 AM, Adriana Reus wrote:
>> 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.
> 
> Acked-by: Rob Herring <robh@...nel.org>
Thanks. Applied to the togreg branch of iio.git - initially pushed out
as testing for the autobuilders to play with it.

Jonathan
> 
>>
>>  .../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.
>>
> 
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