[PATCH 3/4] arm64: dts: renesas: rzg3s-smarc-som: Enable I3C

Wolfram Sang
2025-08-07T15:14:59Z

Enable I3C on the dedicated connector of the RZ/G3S module. Provide
safe defaults allowing to connect even to slow I2C devices.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
index 39845faec894..17fd30df3432 100644
--- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
@@ -7,6 +7,7 @@

#include <dt-bindings/clock/renesas,r9a08g045-vbattb.h>
#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/i3c/i3c.h>
#include <dt-bindings/pinctrl/rzg2l-pinctrl.h>

#include "rzg3s-smarc-switches.h"
@@ -172,6 +173,12 @@ a0 80 30 30 9c
};
};

+&i3c {
+ i2c-scl-hz = <100000>;
+ i3c-scl-hz = <12500000>;
+ status = "okay";
+};
+
#if SW_CONFIG2 == SW_ON
/* SD0 slot */
&sdhi0 {
--
2.47.2