# SPDX-License-Identifier: GPL-2.0 %YAML 1.2 --- $id: http://devicetree.org/schemas/iio/multiplexer/io-channel-mux.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: I/O channel multiplexer maintainers: - Peter Rosin description: | If a multiplexer is used to select which hardware signal is fed to e.g. an ADC channel, these bindings describe that situation. For each non-empty string in the channels property, an io-channel will be created. The number of this io-channel is the same as the index into the list of strings in the channels property, and also matches the mux controller state. The mux controller state is described in Documentation/devicetree/bindings/mux/mux-controller.yaml properties: compatible: const: io-channel-mux io-channels: maxItems: 1 description: Channel node of the parent channel that has multiplexed input. io-channel-names: const: parent mux-controls: true mux-control-names: true channels: $ref: /schemas/types.yaml#/definitions/non-unique-string-array description: List of strings, labeling the mux controller states. An empty string for a state means that the channel is not available. settle-time-us: default: 0 description: Time required for analog signals to settle after muxing. "#io-channel-cells": const: 1 required: - compatible - io-channels - io-channel-names - mux-controls - channels additionalProperties: false examples: - | #include mux: mux-controller { compatible = "gpio-mux"; #mux-control-cells = <0>; mux-gpios = <&pioA 0 GPIO_ACTIVE_HIGH>, <&pioA 1 GPIO_ACTIVE_HIGH>; }; adc-mux { compatible = "io-channel-mux"; io-channels = <&adc 0>; io-channel-names = "parent"; mux-controls = <&mux>; channels = "sync", "in", "system-regulator"; }; ...