linux-kernel - [PATCH 1/2] arm64: dts: renesas: rzg3e-smarc-som: Add I3C support

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Message-ID: <96c503737c4e913dd3a934fdbbb4545e44455a68.1763475830.git.tommaso.merciai.xr@bp.renesas.com>
Date: Tue, 18 Nov 2025 15:26:38 +0100
From: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
To: tomm.merciai@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	biju.das.jz@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] arm64: dts: renesas: rzg3e-smarc-som: Add I3C support

Add I3C support and an I3C bus alias to the rzg3e-smarc-som.dtsi.
This enables support for I3C devices on the R9A09G047E57 SMARC SoM
and prepares for future expansion.

Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
---
 arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi | 13 +++++++++++++
 1 file changed, 13 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..dce5cf3bd841 100644
--- a/arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi
@@ -29,6 +29,7 @@ aliases {
 		ethernet0 = &eth0;
 		ethernet1 = &eth1;
 		i2c2 = &i2c2;
+		i2c9 = &i3c;
 		mmc0 = &sdhi0;
 		mmc2 = &sdhi2;
 	};
@@ -122,6 +123,12 @@ raa215300: pmic@12 {
 	};
 };
 
+&i3c {
+	pinctrl-0 = <&i3c_pins>;
+	pinctrl-names = "default";
+	status = "disabled";
+};
+
 &mdio0 {
 	phy0: ethernet-phy@7 {
 		compatible = "ethernet-phy-id0022.1640",
@@ -219,6 +226,12 @@ 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