linux-kernel - [PATCH 1/2] dt-binding: Add custom property for MAX7357

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Date:   Wed, 30 Aug 2023 13:57:42 +0200
From:   Naresh Solanki <naresh.solanki@...ements.com>
To:     Peter Rosin <peda@...ntia.se>, Andi Shyti <andi.shyti@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Patrick Rudolph <patrick.rudolph@...ements.com>,
        Naresh Solanki <Naresh.Solanki@...ements.com>,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] dt-binding: Add custom property for MAX7357

From: Patrick Rudolph <patrick.rudolph@...ements.com>

Add a custom property "maxim,bus-lockup-fix" to enable proprietary
features on MAX7357. The driver configures MAX7357 to isolate the
failing channel and trigger a flush-out sequence for bus lock-up
resolution.

Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
---
 .../devicetree/bindings/i2c/i2c-mux-pca954x.yaml  | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
index 2d7bb998b0e9..984d4614a270 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
+++ b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
@@ -71,6 +71,11 @@ 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,bus-lockup-fix:
+    type: boolean
+    description: Isolates only the stuck channel and generates a flush-out sequence
+      to attempt to clear the bus lock-up.
+
 required:
   - compatible
   - reg
@@ -95,6 +100,16 @@ allOf:
         "#interrupt-cells": false
         interrupt-controller: false
 
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              const: maxim,max7357
+    then:
+      properties:
+        maxim,bus-lockup-fix: false
+
 unevaluatedProperties: false
 
 examples:

base-commit: f9ea75e087b81081f33e34c4e1ba8b4abe841d9f
-- 
2.41.0