linux-kernel - Re: [PATCH v3 7/8] dt-bindings: iio: document envelope-detector bindings

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Message-ID: <0f054fa3-5b38-ce19-d9b6-d5f862f43ee2@kernel.org>
Date:   Sun, 30 Oct 2016 13:35:26 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Peter Rosin <peda@...ntia.se>, linux-kernel@...r.kernel.org
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-iio@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 7/8] dt-bindings: iio: document envelope-detector
 bindings

On 23/10/16 23:39, Peter Rosin wrote:
> Signed-off-by: Peter Rosin <peda@...ntia.se>
I'm happy with this, but again it's odd enough I'd like some input from
a device tree bindings maintainer.

Thanks,

Jonathan
> ---
>  .../bindings/iio/adc/envelope-detector.txt         | 54 ++++++++++++++++++++++
>  MAINTAINERS                                        |  6 +++
>  2 files changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/envelope-detector.txt
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/envelope-detector.txt b/Documentation/devicetree/bindings/iio/adc/envelope-detector.txt
> new file mode 100644
> index 000000000000..27544bdd4478
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/envelope-detector.txt
> @@ -0,0 +1,54 @@
> +Bindings for ADC envelope detector using a DAC and a comparator
> +
> +The DAC is used to find the peak level of an alternating voltage input
> +signal by a binary search using the output of a comparator wired to
> +an interrupt pin. Like so:
> +                          _
> +                         | \
> +    input +------>-------|+ \
> +                         |   \
> +           .-------.     |    }---.
> +           |       |     |   /    |
> +           |    dac|-->--|- /     |
> +           |       |     |_/      |
> +           |       |              |
> +           |       |              |
> +           |    irq|------<-------'
> +           |       |
> +           '-------'
> +
> +Required properties:
> +- compatible: Should be "axentia,tse850-envelope-detector"
> +- io-channels: Channel node of the dac to be used for comparator input.
> +- io-channel-names: Should be "dac".
> +- interrupt specification for one client interrupt,
> +  see ../../interrupt-controller/interrupts.txt for details.
> +- interrupt-names: Should be "comp".
> +
> +Example:
> +
> +	&i2c {
> +		dpot: mcp4651-104@28 {
> +			compatible = "microchip,mcp4651-104";
> +			reg = <0x28>;
> +			#io-channel-cells = <1>;
> +		};
> +	};
> +
> +	dac: dac {
> +		compatible = "dpot-dac";
> +		vref-supply = <&reg_3v3>;
> +		io-channels = <&dpot 0>;
> +		io-channel-names = "dpot";
> +		#io-channel-cells = <1>;
> +	};
> +
> +	envelope-detector {
> +		compatible = "axentia,tse850-envelope-detector";
> +		io-channels = <&dac 0>;
> +		io-channel-names = "dac";
> +
> +		interrupt-parent = <&gpio>;
> +		interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
> +		interrupt-names = "comp";
> +	};
> diff --git a/MAINTAINERS b/MAINTAINERS
> index d7375f45ff0f..fca35d16037d 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -6119,6 +6119,12 @@ F:	Documentation/ABI/testing/sysfs-bus-iio-dac-dpot-dac
>  F:	Documentation/devicetree/bindings/iio/dac/dpot-dac.txt
>  F:	drivers/iio/dac/dpot-dac.c
>  
> +IIO ENVELOPE DETECTOR
> +M:	Peter Rosin <peda@...ntia.se>
> +L:	linux-iio@...r.kernel.org
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/iio/adc/envelope-detector.txt
> +
>  IIO SUBSYSTEM AND DRIVERS
>  M:	Jonathan Cameron <jic23@...nel.org>
>  R:	Hartmut Knaack <knaack.h@....de>
>