# SPDX-License-Identifier: GPL-2.0 %YAML 1.2 --- $id: http://devicetree.org/schemas/i2c/i2c-mux-pca954x.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: NXP PCA954x I2C and compatible bus switches maintainers: - Laurent Pinchart description: The NXP PCA954x and compatible devices are I2C bus multiplexer/switches that share the same functionality and register layout. The devices usually have 4 or 8 child buses, which are attached to the parent bus by using the SMBus "Send Byte" command. properties: compatible: oneOf: - enum: - maxim,max7356 - maxim,max7357 - maxim,max7358 - maxim,max7367 - maxim,max7368 - maxim,max7369 - nxp,pca9540 - nxp,pca9542 - nxp,pca9543 - nxp,pca9544 - nxp,pca9545 - nxp,pca9546 - nxp,pca9547 - nxp,pca9548 - nxp,pca9846 - nxp,pca9847 - nxp,pca9848 - nxp,pca9849 - items: - const: nxp,pca9646 - const: nxp,pca9546 reg: maxItems: 1 interrupts: maxItems: 1 "#interrupt-cells": const: 2 interrupt-controller: true reset-gpios: maxItems: 1 i2c-mux-idle-disconnect: type: boolean description: Forces mux to disconnect all children in idle state. This is necessary for example, if there are several multiplexers on the bus and the devices behind them use same I2C addresses. idle-state: description: if present, overrides i2c-mux-idle-disconnect $ref: /schemas/mux/mux-controller.yaml#/properties/idle-state vdd-supply: description: A voltage regulator supplying power to the chip. On PCA9846 the regulator supplies power to VDD2 (core logic) and optionally to VDD1. maxim,isolate-stuck-channel: type: boolean description: Allows to use non faulty channels while a stuck channel is isolated from the upstream bus. If not set all channels are isolated from the upstream bus until the fault is cleared. maxim,send-flush-out-sequence: type: boolean description: Send a flush-out sequence to stuck auxiliary buses automatically after a stuck channel is being detected. maxim,preconnection-wiggle-test-enable: type: boolean description: Send a STOP condition to the auxiliary buses when the switch register activates a channel to detect a stuck high fault. On fault the channel is isolated from the upstream bus. required: - compatible - reg allOf: - $ref: /schemas/i2c/i2c-mux.yaml# - if: not: properties: compatible: contains: enum: - maxim,max7367 - maxim,max7369 - nxp,pca9542 - nxp,pca9543 - nxp,pca9544 - nxp,pca9545 then: properties: interrupts: false "#interrupt-cells": false interrupt-controller: false - if: not: properties: compatible: contains: enum: - maxim,max7357 then: properties: maxim,isolate-stuck-channel: false maxim,send-flush-out-sequence: false maxim,preconnection-wiggle-test-enable: false unevaluatedProperties: false examples: - | #include i2c { #address-cells = <1>; #size-cells = <0>; i2c-mux@74 { compatible = "nxp,pca9545"; #address-cells = <1>; #size-cells = <0>; reg = <0x74>; vdd-supply = <&p3v3>; interrupt-parent = <&ipic>; interrupts = <17 IRQ_TYPE_LEVEL_LOW>; interrupt-controller; #interrupt-cells = <2>; i2c@2 { #address-cells = <1>; #size-cells = <0>; reg = <2>; eeprom@54 { compatible = "atmel,24c08"; reg = <0x54>; }; }; i2c@4 { #address-cells = <1>; #size-cells = <0>; reg = <4>; rtc@51 { compatible = "nxp,pcf8563"; reg = <0x51>; }; }; }; }; ...