linux-kernel - [PATCH v2] dt-bindings: i3c: renesas,i3c: Add RZ/V2H(P) and RZ/V2N support

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Message-ID: <20250908093930.12591-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Mon,  8 Sep 2025 10:39:30 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Frank Li <Frank.Li@....com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>
Cc: linux-i3c@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v2] dt-bindings: i3c: renesas,i3c: Add RZ/V2H(P) and RZ/V2N support

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Add device tree binding support for the I3C Bus Interface on Renesas
RZ/V2H(P) and RZ/V2N SoCs. The I3C IP on these SoCs is identical to
that found on the RZ/G3E SoC.

Add new compatible strings "renesas,r9a09g056-i3c" for RZ/V2N and
"renesas,r9a09g057-i3c" for RZ/V2H(P). Both variants use
"renesas,r9a09g047-i3c" as a fallback compatible to indicate hardware
compatibility with the RZ/G3E implementation.

Update the title to be more generic as it now covers multiple SoC
families beyond just RZ/G3S and RZ/G3E.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
---
v1->v2:
- Updated title to be more generic.
- Updated commit message to reflect changes.
- Added Reviewed-by tag.
---
 .../devicetree/bindings/i3c/renesas,i3c.yaml     | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/i3c/renesas,i3c.yaml b/Documentation/devicetree/bindings/i3c/renesas,i3c.yaml
index fe2e9633c46f..a20d875086d4 100644
--- a/Documentation/devicetree/bindings/i3c/renesas,i3c.yaml
+++ b/Documentation/devicetree/bindings/i3c/renesas,i3c.yaml
@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/i3c/renesas,i3c.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Renesas RZ/G3S and RZ/G3E I3C Bus Interface
+title: Renesas I3C Bus Interface
 
 maintainers:
   - Wolfram Sang <wsa+renesas@...g-engineering.com>
@@ -12,10 +12,16 @@ maintainers:
 
 properties:
   compatible:
-    items:
-      - enum:
-          - renesas,r9a08g045-i3c # RZ/G3S
-          - renesas,r9a09g047-i3c # RZ/G3E
+    oneOf:
+      - items:
+          - enum:
+              - renesas,r9a08g045-i3c # RZ/G3S
+              - renesas,r9a09g047-i3c # RZ/G3E
+      - items:
+          - enum:
+              - renesas,r9a09g056-i3c # RZ/V2N
+              - renesas,r9a09g057-i3c # RZ/V2H(P)
+          - const: renesas,r9a09g047-i3c
 
   reg:
     maxItems: 1
-- 
2.51.0