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-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";
- };