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1# SPDX-License-Identifier: GPL-2.02%YAML 1.23---4$id: http://devicetree.org/schemas/mux/gpio-mux.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: GPIO-based multiplexer controller8 9maintainers:10 - Peter Rosin <peda@axentia.se>11 12description: |+13 Define what GPIO pins are used to control a multiplexer. Or several14 multiplexers, if the same pins control more than one multiplexer.15 16 The multiplexer state is defined as the number represented by the17 multiplexer GPIO pins, where the first pin is the least significant18 bit. An active pin is a binary 1, an inactive pin is a binary 0.19 20properties:21 compatible:22 const: gpio-mux23 24 mux-gpios:25 description:26 List of gpios used to control the multiplexer, least significant bit first.27 28 '#mux-control-cells':29 enum: [ 0, 1 ]30 31 '#mux-state-cells':32 enum: [ 1, 2 ]33 34 idle-state:35 default: -136 37required:38 - compatible39 - mux-gpios40anyOf:41 - required:42 - "#mux-control-cells"43 - required:44 - "#mux-state-cells"45 46additionalProperties: false47 48examples:49 - |50 #include <dt-bindings/gpio/gpio.h>51 52 mux: mux-controller {53 compatible = "gpio-mux";54 #mux-control-cells = <0>;55 56 mux-gpios = <&pioA 0 GPIO_ACTIVE_HIGH>,57 <&pioA 1 GPIO_ACTIVE_HIGH>;58 };59 60 adc-mux {61 compatible = "io-channel-mux";62 io-channels = <&adc 0>;63 io-channel-names = "parent";64 65 mux-controls = <&mux>;66 67 channels = "sync-1", "in", "out", "sync-2";68 };69 70 i2c-mux {71 compatible = "i2c-mux";72 i2c-parent = <&i2c1>;73 74 mux-controls = <&mux>;75 76 #address-cells = <1>;77 #size-cells = <0>;78 79 i2c@0 {80 reg = <0>;81 #address-cells = <1>;82 #size-cells = <0>;83 84 ssd1307: oled@3c {85 reg = <0x3c>;86 };87 };88 89 i2c@3 {90 reg = <3>;91 #address-cells = <1>;92 #size-cells = <0>;93 94 pca9555: pca9555@20 {95 reg = <0x20>;96 };97 };98 };99...100