linux-kernel - [PATCH 1/4] dt-bindings: i3c: Add snps,dev-nack-retry-cnt property to Synopsys I3C master

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Message-ID: <9c16c22f67858e24fe7c3a7184537cb5c2c1a85c.1762245890.git.adrianhoyin.ng@altera.com>
Date: Tue,  4 Nov 2025 16:51:08 +0800
From: adrianhoyin.ng@...era.com
To: alexandre.belloni@...tlin.com,
	Frank.Li@....com,
	wsa+renesas@...g-engineering.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	dinguyen@...nel.org,
	linux-i3c@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: adrianhoyin.ng@...era.com
Subject: [PATCH 1/4] dt-bindings: i3c: Add snps,dev-nack-retry-cnt property to Synopsys I3C master

From: Adrian Ng Ho Yin <adrianhoyin.ng@...era.com>

Add a new optional property 'snps,dev-nack-retry-cnt' to the Synopsys
DesignWare I3C master device tree binding. This property allows
configuration of the Device NACK Retry count, which determines how many
times the controller retries a transaction when a slave device responds
with NACK.

Valid values range from 0 to 3, with a default of 0

Signed-off-by: Adrian Ng Ho Yin <adrianhoyin.ng@...era.com>
---
 .../devicetree/bindings/i3c/snps,dw-i3c-master.yaml       | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.yaml b/Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.yaml
index 5f6467375811..c233be2d4a3c 100644
--- a/Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.yaml
+++ b/Documentation/devicetree/bindings/i3c/snps,dw-i3c-master.yaml
@@ -37,6 +37,14 @@ properties:
   power-domains:
     maxItems: 1
 
+  snps,dev-nack-retry-cnt:
+    description: |
+      This field is used to set the Device NACK Retry count for the
+      particular slave device.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0
+    maximum: 3
+
 required:
   - compatible
   - reg
-- 
2.49.GIT