linux-kernel - [PATCH 2/5] dt-bindings: i2c: nvidia,tegra20-i2c: Document Tegra264 I2C

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Message-ID: <20250108110620.86900-3-kkartik@nvidia.com>
Date: Wed, 8 Jan 2025 16:36:17 +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 2/5] dt-bindings: i2c: nvidia,tegra20-i2c: Document Tegra264 I2C

Tegra264 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 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>
---
 .../devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml         | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
index b57ae6963e62..2a016359328e 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
+          T194, a MUTEX register is added to support use of the same I2C
+          instance across multiple firmware.
+        const: nvidia,tegra264-i2c
 
   reg:
     maxItems: 1
-- 
2.43.0