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dt-bindings: iio: document envelope-detector bindings

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Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Peter Rosin 2016-11-08 12:58:57 +01:00 committed by Jonathan Cameron
parent 7fde1484af
commit e778aa142a
2 changed files with 60 additions and 0 deletions
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54
Documentation/devicetree/bindings/iio/adc/envelope-detector.txt Normal file
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@ -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";
};

6
MAINTAINERS
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@ -6127,6 +6127,12 @@ 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@axentia.se>
L: linux-iio@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/iio/adc/envelope-detector.txt
IIO SUBSYSTEM AND DRIVERS
M: Jonathan Cameron <jic23@kernel.org>
R: Hartmut Knaack <knaack.h@gmx.de>