[PATCH v3 0/3] Add support for Renesas RZ/G3L CANFD

[PATCH v3 0/3] Add support for Renesas RZ/G3L CANFD

[Biju Das]

Add support for Renesas RZ/G3L CANFD.
The RZ/G3L CANFD IP has 3 channels and 11 interrupts compared to 2 channels
and 8 interrupts that of RZ/G3S. RZ/G3L has 288 buffers compared to 192
buffers on RZ/G3S SoC.

This patch series depend upon [1]
[1] https://lore.kernel.org/all/20260902141544.565763-1-claudiu.beznea+renesas@tuxon.dev/

v2->v3:
 * Collected tags.
 * Added check against RCANFD_NUM_CHANNELS, to avoid overrunning the
   fixed-size rcar_canfd_global.ch[] and transceivers[] arrays.
 * Fixed typo 198->192 buffers in commit description.
v1->v2:
 * Added support for deriving max_channels from the device tree.
 * Dropped clock patch as it is accepted.
 * Dropped devicetree patches, will send it later.
 * Updated commit description
 * Dropped RZ/G3S fallback as there are lot of differences.

Biju Das (3):
  dt-bindings: can: renesas,rcar-canfd: Document RZ/G3L SoC
  can: rcar_canfd: Derive max_channels from the device tree
  can: rcar_canfd: Add support for Renesas RZ/G3L

 .../bindings/net/can/renesas,rcar-canfd.yaml  | 27 ++++++++++++-
 drivers/net/can/rcar/rcar_canfd.c             | 40 +++++++++----------
 2 files changed, 46 insertions(+), 21 deletions(-)

-- 
2.43.0

[PATCH v3 1/3] dt-bindings: can: renesas,rcar-canfd: Document RZ/G3L SoC

[Biju Das]

Document the RZ/G3L (R9A08G046) SoC support.

RZ/G3L has 11 interrupts and 3 CANFD channels compared to 8 interrupts
and 2 CANFD channels on RZ/G3S. RZ/G3L has 288 buffers in total
compared to 192 buffers in RZ/G3S.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
v2->v3:
 * Collected tag.
v1->v2:
 * Updated commit description
 * Dropped RZ/G3S fallback as there are lot of differences.
---
 .../bindings/net/can/renesas,rcar-canfd.yaml  | 27 ++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
index bbaaef8f4282..71b756c26cec 100644
--- a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
+++ b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
@@ -14,6 +14,7 @@ properties:
     oneOf:
       - enum:
           - renesas,r9a08g045-canfd        # RZ/G3S
+          - renesas,r9a08g046-canfd        # RZ/G3L
           - renesas,r9a09g047-canfd        # RZ/G3E
           - renesas,r9a09g077-canfd        # RZ/T2H
 
@@ -292,6 +293,28 @@ allOf:
       patternProperties:
         "^channel[6-7]$": false
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a08g046-canfd
+    then:
+      properties:
+        interrupts:
+          minItems: 11
+          maxItems: 11
+
+        interrupt-names:
+          minItems: 11
+          maxItems: 11
+
+        resets:
+          minItems: 2
+          maxItems: 2
+
+      patternProperties:
+        "^channel[3-7]$": false
+
   - if:
       properties:
         compatible:
@@ -356,7 +379,9 @@ allOf:
       properties:
         compatible:
           contains:
-            const: renesas,r9a08g045-canfd
+            enum:
+              - renesas,r9a08g045-canfd
+              - renesas,r9a08g046-canfd
     then:
       properties:
         renesas,no-can-fd: false
-- 
2.43.0

Re: [PATCH v3 1/3] dt-bindings: can: renesas,rcar-canfd: Document RZ/G3L SoC

[Krzysztof Kozlowski]

On Fri, Sep 25, 2026 at 09:21:28AM +0100, Biju Das wrote:
> +    then:
> +      properties:
> +        interrupts:
> +          minItems: 11
> +          maxItems: 11
> +
> +        interrupt-names:
> +          minItems: 11
> +          maxItems: 11
> +
> +        resets:
> +          minItems: 2
> +          maxItems: 2

Drop maxItems

I'll fix existing code.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof

Re: [PATCH v3 0/3] Add support for Renesas RZ/G3L CANFD

[Marc Kleine-Budde]

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On 25.09.2026 09:21:27, Biju Das wrote:
> Add support for Renesas RZ/G3L CANFD.
> The RZ/G3L CANFD IP has 3 channels and 11 interrupts compared to 2 channels
> and 8 interrupts that of RZ/G3S. RZ/G3L has 288 buffers compared to 192
> buffers on RZ/G3S SoC.
>
> This patch series depend upon [1]
> [1] https://lore.kernel.org/all/20260902141544.565763-1-claudiu.beznea+renesas@tuxon.dev/

Is the DT bindings update (#1/3) going through the Renesas tree?

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde          |
Embedded Linux                   | https://www.pengutronix.de |
Vertretung Nürnberg              | Phone: +49-5121-206917-129 |
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RE: [PATCH v3 0/3] Add support for Renesas RZ/G3L CANFD

[Biju Das]

Hi Marc,

> -----Original Message-----
> From: Marc Kleine-Budde <mkl@pengutronix.de>
> Sent: 29 September 2026 15:24
> Subject: Re: [PATCH v3 0/3] Add support for Renesas RZ/G3L CANFD
> 
> On 25.09.2026 09:21:27, Biju Das wrote:
> > Add support for Renesas RZ/G3L CANFD.
> > The RZ/G3L CANFD IP has 3 channels and 11 interrupts compared to 2
> > channels and 8 interrupts that of RZ/G3S. RZ/G3L has 288 buffers
> > compared to 192 buffers on RZ/G3S SoC.
> >
> > This patch series depend upon [1]
> > [1]
> > https://lore.kernel.org/all/20260902141544.565763-1-claudiu.beznea+ren
> > esas@tuxon.dev/
> 
> Is the DT bindings update (#1/3) going through the Renesas tree?

No, It is through CAN tree.

Cheers,
Biju