linux-kernel - [PATCH] arm64: dts: rockchip: Enable i2c2 on Orange Pi 3B

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Message-Id: <20251120-orangepi3-enable-i2c2-v1-1-2e023a74012a@rootcommit.com>
Date: Thu, 20 Nov 2025 19:00:34 +0000 (UTC)
From: Michael Opdenacker <michael.opdenacker@...tcommit.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Michael Opdenacker <michael.opdenacker@...tcommit.com>
Subject: [PATCH] arm64: dts: rockchip: Enable i2c2 on Orange Pi 3B

Enable the "i2c2" bus on header pins 3 (I2C_SDA_M1)
and 5 (I2C2_SCL_M1) of the Orange Pi 3B board.

As documented on http://www.orangepi.org/img/pi3b/0719-pi3b-19.png,
such pins are the only ones offering I2C functionality
without conflicting with other SoC blocks.

Signed-off-by: Michael Opdenacker <michael.opdenacker@...tcommit.com>
---
 arch/arm64/boot/dts/rockchip/rk3566-orangepi-3b.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-orangepi-3b.dtsi b/arch/arm64/boot/dts/rockchip/rk3566-orangepi-3b.dtsi
index d539570f531e..e2f0ccc6dbe7 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-orangepi-3b.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3566-orangepi-3b.dtsi
@@ -435,6 +435,11 @@ regulator-state-mem {
 	};
 };
 
+&i2c2 {
+	pinctrl-0 = <&i2c2m1_xfer>;
+	status = "okay";
+};
+
 &i2s0_8ch {
 	status = "okay";
 };

---
base-commit: 8e621c9a337555c914cf1664605edfaa6f839774
change-id: 20251120-orangepi3-enable-i2c2-fe6d25ec681a

Best regards,
-- 
Michael Opdenacker <michael.opdenacker@...tcommit.com>