[PATCH v5 5/5] arm64: dts: imx8ulp: Add rpmsg node under imx_rproc

Shenwei Wang
2025-11-04T20:34:52Z

Add the RPMSG bus node along with its GPIO subnodes to the device
tree.

Enable remote device communication and GPIO control via RPMSG on
the i.MX platform.

Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>
---
arch/arm64/boot/dts/freescale/imx8ulp.dtsi | 27 ++++++++++++++++++++++
1 file changed, 27 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
index 13b01f3aa2a4..6ab1c12a3bc1 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
@@ -191,6 +191,33 @@ scmi_sensor: protocol@15 {
cm33: remoteproc-cm33 {
compatible = "fsl,imx8ulp-cm33";
status = "disabled";
+
+ rpmsg {
+ rpmsg-io-channel {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ rpmsg_gpioa: gpio@0 {
+ compatible = "fsl,imx-rpmsg-gpio";
+ reg = <0>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ interrupt-parent = <&rpmsg_gpioa>;
+ };
+
+ rpmsg_gpiob: gpio@1 {
+ compatible = "fsl,imx-rpmsg-gpio";
+ reg = <1>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ #interrupt-cells = <2>;
+ interrupt-controller;
+ interrupt-parent = <&rpmsg_gpiob>;
+ };
+ };
+ };
};

soc: soc@0 {
--
2.43.0