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

Enable CANFD channel 0, which is available on the CN55 connector.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 .../dts/renesas/r9a09g077m44-rzt2h-evk.dts    | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
index d1474f1bd523..e6d6012a5154 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
@@ -138,6 +138,16 @@ led-8 {
 	};
 };
 
+&canfd {
+	pinctrl-0 = <&can0_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	channel0 {
+		status = "okay";
+	};
+};
+
 &i2c0 {
 	pinctrl-0 = <&i2c0_pins>;
 	pinctrl-names = "default";
@@ -166,6 +176,17 @@ &mdio2_phy {
 };
 
 &pinctrl {
+	/*
+	 * CAN0 Pin Configuration:
+	 *
+	 * SW7[1] OFF; SW7[2] ON - Use P24_4 as CANTX0.
+	 * SW7[3] OFF; SW7[4] ON - Use P24_3 as CANRX0.
+	 */
+	can0_pins: can0-pins {
+		pinmux = <RZT2H_PORT_PINMUX(24, 3, 0x19)>, /* CANRX0 */
+			 <RZT2H_PORT_PINMUX(24, 4, 0x19)>; /* CANTX0 */
+	};
+
 	/*
 	 * GMAC2 Pin Configuration:
 	 *
-- 
2.52.0

On Wed, 24 Dec 2025 at 18:52, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Enable CANFD channel 0, which is available on the CN55 connector.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v6.20.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds