[PATCH 4/4] arm64: dts: imx8ulp: Add rpmsg node under imx_rproc

[Shenwei Wang]

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.w...@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