[PATCH 1/2] dt-bindings: can: renesas,rcar-canfd: Document renesas,fd-only property

From: Biju

Date: Tue Nov 18 2025 - 09:29:53 EST


From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>

The CANFD on RZ/{G2L,G3E} and R-Car Gen4 support 3 modes FD-Only mode,
Classical CAN mode and CAN-FD mode. In FD-Only mode, communication in
Classical CAN frame format is disabled. Document renesas,fd-only to handle
this mode. As these SoCs support 3 modes, update the description of
renesas,no-can-fd property.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
.../bindings/net/can/renesas,rcar-canfd.yaml | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
index f4ac21c68427..bf9a7d5288d3 100644
--- a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
+++ b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
@@ -125,9 +125,17 @@ properties:
renesas,no-can-fd:
$ref: /schemas/types.yaml#/definitions/flag
description:
- The controller can operate in either CAN FD only mode (default) or
- Classical CAN only mode. The mode is global to all channels.
- Specify this property to put the controller in Classical CAN only mode.
+ The controller can operate in either CAN-FD mode (default) or FD-Only
+ mode (RZ/{G2L,G3E} and R-Car Gen4) or Classical CAN mode. Specify this
+ property to put the controller in Classical CAN mode.
+
+ renesas,fd-only:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ The CANFD on RZ/{G2L,G3E} and R-Car Gen4 SoCs support 3 modes FD-Only
+ mode, Classical CAN mode and CAN-FD mode (default). In FD-Only mode,
+ communication in Classical CAN frame format is disabled. Specify this
+ property to put the controller in FD-Only mode.

assigned-clocks:
description:
--
2.43.0