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# 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 <laurent.pinchart@ideasonboard.com>
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 <dt-bindings/interrupt-controller/irq.h>
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>;
};
};
};
};
...
|
