From 5731cb4bef55d1fb649bc862b8e6f8e4cfd10e92 Mon Sep 17 00:00:00 2001 From: Patrick Rudolph Date: Tue, 30 Jan 2024 17:49:00 +0530 Subject: [PATCH] dt-bindings: i2c: pca954x: Add custom properties for MAX7357 Maxim Max7357 has a configuration register to enable additional features. These features aren't enabled by default & its up to board designer to enable the same as it may have unexpected side effects. These should be validated for proper functioning & detection of devices in secondary bus as sometimes it can cause secondary bus being disabled. Add booleans for: - maxim,isolate-stuck-channel - maxim,send-flush-out-sequence - maxim,preconnection-wiggle-test-enable Signed-off-by: Patrick Rudolph Signed-off-by: Naresh Solanki Reviewed-by: Rob Herring Signed-off-by: Andi Shyti --- .../bindings/i2c/i2c-mux-pca954x.yaml | 30 +++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml index 2d7bb998b0e9d..9aa0585200c9c 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml +++ b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml @@ -71,6 +71,23 @@ properties: 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 @@ -95,6 +112,19 @@ allOf: "#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: -- 2.30.2