[PATCH v2 1/1] arm64: dts: renesas: rzg3e-smarc-som: Enable I3C support
From: Tommaso Merciai
Date: Thu Nov 20 2025 - 06:52:19 EST
Enable I3C on RZ/G3E SMARC SoM.
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@xxxxxxxxxxxxxx>
---
v1->v2:
- Dropped overlay and moved I3C support (pure bus mode) directly to the
rzg3e-smarc-som.dtsi as suggested by Wolfram Sang.
- Removed alias as suggested by Wolfram Sang.
arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi
index 7faa44510d98..f05b9fec05f0 100644
--- a/arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi
@@ -122,6 +122,14 @@ raa215300: pmic@12 {
};
};
+&i3c {
+ pinctrl-0 = <&i3c_pins>;
+ pinctrl-names = "default";
+ i2c-scl-hz = <400000>;
+ i3c-scl-hz = <12500000>;
+ status = "okay";
+};
+
&mdio0 {
phy0: ethernet-phy@7 {
compatible = "ethernet-phy-id0022.1640",
@@ -219,6 +227,12 @@ i2c2_pins: i2c {
<RZG3E_PORT_PINMUX(3, 5, 1)>; /* SDA2 */
};
+ i3c_pins: i3c {
+ pinmux = <RZG3E_PORT_PINMUX(2, 0, 2)>, /* I3C0_SCL */
+ <RZG3E_PORT_PINMUX(2, 1, 2)>; /* I3C0_SDA */
+ drive-push-pull;
+ };
+
rtc_irq_pin: rtc-irq {
pins = "PS1";
bias-pull-up;
--
2.43.0