linux-kernel - [PATCH v3 08/19] dt-bindings: media: i2c: max96712: add support for I2C ATR

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Message-ID: <20250512212832.3674722-9-demonsingur@gmail.com>
Date: Tue, 13 May 2025 00:28:17 +0300
From: Cosmin Tanislav <demonsingur@...il.com>
To: 
Cc: Cosmin Tanislav <cosmin.tanislav@...log.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Niklas Söderlund <niklas.soderlund@...natech.se>,
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	Catalin Marinas <catalin.marinas@....com>,
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	Mark Brown <broonie@...nel.org>,
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	Dan Carpenter <dan.carpenter@...aro.org>,
	Ricardo Ribalda <ribalda@...omium.org>,
	Laurentiu Palcu <laurentiu.palcu@....nxp.com>,
	linux-media@...r.kernel.org,
	devicetree@...r.kernel.org,
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	Cosmin Tanislav <demonsingur@...il.com>
Subject: [PATCH v3 08/19] dt-bindings: media: i2c: max96712: add support for I2C ATR

MAX96712 and MAX96724 have more than one GMSL2 link, and each link is
capable of connecting to a separate serializer. If these serializers
have the same CFG pins configuration, they will also have the same I2C
address, causing conflicts unless the deserializer changes the address
of the connected serializers.

The MAX96712 and MAX96724 support changing the I2C address of the
connected serializers.

Document this capability.

Signed-off-by: Cosmin Tanislav <demonsingur@...il.com>
---
 .../bindings/media/i2c/maxim,max96712.yaml    | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max96712.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max96712.yaml
index f712d7cfc35f..758c0223977d 100644
--- a/Documentation/devicetree/bindings/media/i2c/maxim,max96712.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/maxim,max96712.yaml
@@ -37,6 +37,30 @@ properties:
 
   enable-gpios: true
 
+  i2c-alias-pool:
+    maxItems: 4
+
+  i2c-atr:
+    type: object
+    additionalProperties: false
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+    patternProperties:
+      '^i2c@[0-3]$':
+        $ref: /schemas/i2c/i2c-controller.yaml#
+        unevaluatedProperties: false
+        properties:
+          reg:
+            items:
+              minimum: 0
+              maximum: 3
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
 
@@ -79,6 +103,13 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - $ref: /schemas/i2c/i2c-atr.yaml#
+
+dependentRequired:
+  i2c-atr: [i2c-alias-pool]
+  i2c-alias-pool: [i2c-atr]
+
 examples:
   - |
     #include <dt-bindings/gpio/gpio.h>
-- 
2.49.0