From aaaa689aa29d96b74f8aaddb51bd1aa4658020bd Mon Sep 17 00:00:00 2001
From: Akhil R <akhilrajeev@nvidia.com>
Date: Tue, 3 Jun 2025 21:00:20 +0530
Subject: [PATCH] dt-bindings: i2c: nvidia,tegra20-i2c: Specify the required
 properties
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commit 903cc7096db22f889d48e2cee8840709ce04fdac upstream.

Specify the properties which are essential and which are not for the
Tegra I2C driver to function correctly. This was not added correctly when
the TXT binding was converted to yaml. All the existing DT nodes have
these properties already and hence this does not break the ABI.

dmas and dma-names which were specified as a must in the TXT binding
is now made optional since the driver can work in PIO mode if dmas are
missing.

Fixes: f10a9b722f80 ("dt-bindings: i2c: tegra: Convert to json-schema”)
Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
Cc: <stable@vger.kernel.org> # v5.17+
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Andi Shyti <andi@smida.it>
Link: https://lore.kernel.org/r/20250603153022.39434-1-akhilrajeev@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 .../bindings/i2c/nvidia,tegra20-i2c.yaml      | 24 ++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
index 424a4fc218b6..2cb311ddd912 100644
--- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
@@ -103,7 +103,10 @@ properties:
 
   resets:
     items:
-      - description: module reset
+      - description:
+          Module reset. This property is optional for controllers in Tegra194,
+          Tegra234 etc where an internal software reset is available as an
+          alternative.
 
   reset-names:
     items:
@@ -119,6 +122,13 @@ properties:
       - const: rx
       - const: tx
 
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
 allOf:
   - $ref: /schemas/i2c/i2c-controller.yaml
   - if:
@@ -172,6 +182,18 @@ allOf:
           items:
             - description: phandle to the VENC power domain
 
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - nvidia,tegra194-i2c
+    then:
+      required:
+        - resets
+        - reset-names
+
 unevaluatedProperties: false
 
 examples: