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

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Message-ID: <56001C07.5040802@kernel.org>
Date:	Mon, 21 Sep 2015 10:02:31 -0500
From:	Rob Herring <robh@...nel.org>
To:	Adriana Reus <adriana.reus@...el.com>
Cc:	jic23@...nel.org, 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 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>

> 
>  .../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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