linux-kernel - [PATCH v3 1/5] dt-bindings: i2c: nvidia,tegra20-i2c: Document Tegra264 I2C

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Message-ID: <20250609093420.3050641-2-kkartik@nvidia.com>
Date: Mon, 9 Jun 2025 15:04:16 +0530
From: Kartik Rajput <kkartik@...dia.com>
To: <akhilrajeev@...dia.com>, <andi.shyti@...nel.org>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>, <thierry.reding@...il.com>,
	<jonathanh@...dia.com>, <ldewangan@...dia.com>, <digetx@...il.com>,
	<linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v3 1/5] dt-bindings: i2c: nvidia,tegra20-i2c: Document Tegra264 I2C

iTegra264 has 17 generic I2C controllers, two of which are in always-on
partition of the SoC. In addition to the features supported by Tegra194
it also supports a SW mutex register to allow sharing the same I2C
instance across multiple firmware.

Document compatible string "nvidia,tegra264-i2c" for Tegra264 I2C.

Signed-off-by: Kartik Rajput <kkartik@...dia.com>
---
v2 -> v3:
	* Add constraints for "nvidia,tegra264-i2c".
v1 -> v2:
	* Fixed typos.
---
 .../devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml        | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
index 6b6f6762d122..f0693b872cb6 100644
--- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
@@ -80,6 +80,12 @@ properties:
           support for 64 KiB transactions whereas earlier chips supported no
           more than 4 KiB per transactions.
         const: nvidia,tegra194-i2c
+      - description:
+          Tegra264 has 17 generic I2C controllers, two of which are in the AON
+          (always-on) partition of the SoC. In addition to the features from
+          Tegra194, a SW mutex register is added to support use of the same I2C
+          instance across multiple firmwares.
+        const: nvidia,tegra264-i2c
 
   reg:
     maxItems: 1
@@ -186,6 +192,7 @@ allOf:
             contains:
               enum:
                 - nvidia,tegra194-i2c
+                - nvidia,tegra264-i2c
     then:
       required:
         - resets
-- 
2.43.0