Register the RPMsg channel driver and populate remote devices defined
under the "rpmsg" subnode upon receiving their notification messages.

The following illustrates the expected DTS layout structure:

	cm33: remoteproc-cm33 {
		compatible = "fsl,imx8ulp-cm33";

		rpmsg {
			rpmsg-io-channel {
				gpio@0 {
					compatible = "fsl,imx-rpmsg-gpio";
					reg = <0>;
				};

				gpio@1 {
					compatible = "fsl,imx-rpmsg-gpio";
					reg = <1>;
				};

				...
			};

			...
		};
	};

Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>
---
 drivers/remoteproc/imx_rproc.c   | 143 +++++++++++++++++++++++++++++++
 include/linux/rpmsg/rpdev_info.h |  33 +++++++
 2 files changed, 176 insertions(+)
 create mode 100644 include/linux/rpmsg/rpdev_info.h

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 33f21ab24c92..65ee16fd66d1 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -15,6 +15,8 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
 #include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
@@ -22,6 +24,8 @@
 #include <linux/reboot.h>
 #include <linux/regmap.h>
 #include <linux/remoteproc.h>
+#include <linux/rpmsg.h>
+#include <linux/rpmsg/rpdev_info.h>
 #include <linux/workqueue.h>
 
 #include "imx_rproc.h"
@@ -1016,6 +1020,141 @@ static void imx_rproc_destroy_workqueue(void *data)
 	destroy_workqueue(workqueue);
 }
 
+struct imx_rpmsg_driver {
+	struct rpmsg_driver rpdrv;
+	const char *compat;
+	void *driver_data;
+};
+
+static const char *channel_device_map[][2] = {
+	{"rpmsg-io-channel", "rpmsg-gpio"},
+};
+
+static int imx_rpmsg_endpoint_cb(struct rpmsg_device *rpdev, void *data,
+				 int len, void *priv, u32 src)
+{
+	struct rpdev_platform_info *drvdata;
+
+	drvdata = dev_get_drvdata(&rpdev->dev);
+	if (drvdata && drvdata->rx_callback)
+		return drvdata->rx_callback(rpdev, data, len, priv, src);
+
+	return 0;
+}
+
+static void imx_rpmsg_endpoint_remove(struct rpmsg_device *rpdev)
+{
+	of_platform_depopulate(&rpdev->dev);
+}
+
+static int imx_rpmsg_endpoint_probe(struct rpmsg_device *rpdev)
+{
+	struct rpdev_platform_info *drvdata;
+	struct imx_rpmsg_driver *imx_rpdrv;
+	struct device *dev = &rpdev->dev;
+	struct of_dev_auxdata *auxdata;
+	struct rpmsg_driver *rpdrv;
+
+	rpdrv = container_of(dev->driver, struct rpmsg_driver, drv);
+	imx_rpdrv = container_of(rpdrv, struct imx_rpmsg_driver, rpdrv);
+
+	if (!imx_rpdrv->driver_data)
+		return -EINVAL;
+
+	drvdata = devm_kmemdup(dev, imx_rpdrv->driver_data, sizeof(*drvdata), GFP_KERNEL);
+	if (!drvdata)
+		return -ENOMEM;
+
+	auxdata = devm_kzalloc(dev, sizeof(*auxdata) * 2, GFP_KERNEL);
+	if (!auxdata)
+		return -ENOMEM;
+
+	drvdata->rpdev = rpdev;
+	auxdata[0].compatible = devm_kstrdup(dev, imx_rpdrv->compat, GFP_KERNEL);
+	auxdata[0].platform_data = drvdata;
+	dev_set_drvdata(dev, drvdata);
+
+	of_platform_populate(drvdata->channel_node, NULL, auxdata, dev);
+
+	return 0;
+}
+
+static const char *imx_of_rpmsg_is_in_map(const char *name)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(channel_device_map); i++) {
+		if (strcmp(name, channel_device_map[i][0]) == 0)
+			return channel_device_map[i][1];
+	}
+
+	return NULL;
+}
+
+static int imx_of_rpmsg_register_rpdriver(struct device_node *channel,
+					  struct device *dev,
+					  const char *name,
+					  const char *compat)
+{
+	struct rpdev_platform_info *driver_data;
+	struct imx_rpmsg_driver *rp_driver;
+	struct rpmsg_device_id *rpdev_id;
+
+	/* rpmsg_device_id is a NULL terminated array */
+	rpdev_id = devm_kzalloc(dev, sizeof(*rpdev_id) * 2, GFP_KERNEL);
+	if (!rpdev_id)
+		return -ENOMEM;
+
+	strscpy(rpdev_id[0].name, name, RPMSG_NAME_SIZE);
+
+	rp_driver = devm_kzalloc(dev, sizeof(*rp_driver), GFP_KERNEL);
+	if (!rp_driver)
+		return -ENOMEM;
+
+	driver_data = devm_kzalloc(dev, sizeof(*driver_data), GFP_KERNEL);
+	if (!driver_data)
+		return -ENOMEM;
+
+	driver_data->rproc_name = dev->of_node->name;
+	driver_data->channel_node = channel;
+
+	rp_driver->rpdrv.drv.name = name;
+	rp_driver->rpdrv.id_table = rpdev_id;
+	rp_driver->rpdrv.probe = imx_rpmsg_endpoint_probe;
+	rp_driver->rpdrv.remove = imx_rpmsg_endpoint_remove;
+	rp_driver->rpdrv.callback = imx_rpmsg_endpoint_cb;
+	rp_driver->driver_data = driver_data;
+	rp_driver->compat = compat;
+
+	register_rpmsg_driver(&rp_driver->rpdrv);
+
+	return 0;
+}
+
+static int rproc_of_rpmsg_node_init(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const char *compat;
+	int ret;
+
+	struct device_node *np __free(device_node) = of_get_child_by_name(dev->of_node, "rpmsg");
+	if (!np)
+		return 0;
+
+	for_each_child_of_node_scoped(np, child) {
+		compat = imx_of_rpmsg_is_in_map(child->name);
+		if (!compat)
+			ret = of_platform_default_populate(child, NULL, dev);
+		else
+			ret = imx_of_rpmsg_register_rpdriver(child, dev, child->name, compat);
+
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
 static int imx_rproc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -1114,6 +1253,10 @@ static int imx_rproc_probe(struct platform_device *pdev)
 		goto err_put_pm;
 	}
 
+	ret = rproc_of_rpmsg_node_init(pdev);
+	if (ret < 0)
+		dev_info(dev, "populating 'rpmsg' node failed\n");
+
 	return 0;
 
 err_put_pm:
diff --git a/include/linux/rpmsg/rpdev_info.h b/include/linux/rpmsg/rpdev_info.h
new file mode 100644
index 000000000000..13e020cd028b
--- /dev/null
+++ b/include/linux/rpmsg/rpdev_info.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright 2025 NXP */
+
+/*
+ * @file linux/rpdev_info.h
+ *
+ * @brief Global header file for RPDEV Info
+ *
+ * @ingroup RPMSG
+ */
+#ifndef __LINUX_RPDEV_INFO_H__
+#define __LINUX_RPDEV_INFO_H__
+
+#define MAX_DEV_PER_CHANNEL    10
+
+/**
+ * rpdev_platform_info - store the platform information of rpdev
+ * @rproc_name: the name of the remote proc.
+ * @rpdev: rpmsg channel device
+ * @device_node: pointer to the device node of the rpdev.
+ * @rx_callback: rx callback handler of the rpdev.
+ * @channel_devices: an array of the devices related to the rpdev.
+ */
+struct rpdev_platform_info {
+	const char *rproc_name;
+	struct rpmsg_device *rpdev;
+	struct device_node *channel_node;
+	int (*rx_callback)(struct rpmsg_device *rpdev, void *data,
+			   int len, void *priv, u32 src);
+	void *channel_devices[MAX_DEV_PER_CHANNEL];
+};
+
+#endif /* __LINUX_RPDEV_INFO_H__ */
-- 
2.43.0