On 23/10/16 23:39, Peter Rosin wrote:
> Signed-off-by: Peter Rosin <p...@axentia.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 = <®_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 <p...@axentia.se>
> +L: linux-...@vger.kernel.org
> +S: Maintained
> +F: Documentation/devicetree/bindings/iio/adc/envelope-detector.txt
> +
> IIO SUBSYSTEM AND DRIVERS
> M: Jonathan Cameron <ji...@kernel.org>
> R: Hartmut Knaack <knaac...@gmx.de>
>
