[dm][core] Add rt_bus_probe_device API

Add rt_bus_probe_device() to retry driver matching for a registered
but unbound device. Use it when an OFW-created platform device
is requested again, while preserving native-bus ownership
for I2C, SPI, and other non-platform devices.
Also instantiate eligible child platform devices after a parent node is registered.

Signed-off-by: GuEe-GUI <[email protected]>

3 files changed, 46 insertions, 4 deletions

diff --git a/components/drivers/core/bus.c b/components/drivers/core/bus.c
index 72ff49628d..659c2fbe63 100644
--- a/components/drivers/core/bus.c
+++ b/components/drivers/core/bus.c
@@ -242,6 +242,29 @@ static int bus_probe_device(rt_driver_t drv, void *dev_ptr)
 }
 
 /**
+ *  @brief Retry matching an unbound device against the drivers on its bus
+ *
+ *  @param dev the device to probe
+ *
+ *  @return RT_EOK if the device is already bound or a probe succeeds
+ */
+rt_err_t rt_bus_probe_device(rt_device_t dev)
+{
+    if (!dev || !dev->bus)
+    {
+        return -RT_EINVAL;
+    }
+
+    if (dev->drv)
+    {
+        return RT_EOK;
+    }
+
+    return rt_bus_for_each_drv(dev->bus, dev, bus_probe_device);
+}
+RTM_EXPORT(rt_bus_probe_device);
+
+/**
  *  @brief This function add a driver to the drv_list of a specific bus
  *
  *  @param bus the bus to add
diff --git a/components/drivers/core/platform_ofw.c b/components/drivers/core/platform_ofw.c
index d617f112fa..4bc2deed5d 100644
--- a/components/drivers/core/platform_ofw.c
+++ b/components/drivers/core/platform_ofw.c
@@ -227,14 +227,22 @@ rt_err_t rt_platform_ofw_request(struct rt_ofw_node *np)
             /*
              * Device was already created (np->dev != NULL).
              * - If it's already probed (dev->drv != NULL), nothing to do.
-             * - If not yet probed (dev->drv == NULL), it belongs to its native bus
-             *   (e.g. I2C/SPI) which will handle probing; platform bus should not reload
-             *   or transfer it, to avoid cross-bus conflicts.
+             * - Retry only devices created by the OFW platform scanner. Other
+             *   devices belong to their native bus (e.g. I2C/SPI) and must not
+             *   be transferred to or probed through the platform bus.
              */
-            err = RT_EOK;
+            if (!dev->drv && rt_ofw_node_test_flag(np, RT_OFW_F_PLATFORM))
+            {
+                err = rt_bus_probe_device(dev);
+            }
+            else
+            {
+                err = RT_EOK;
+            }
         }
         else
         {
+            struct rt_ofw_node_id *id;
             struct rt_platform_device *pdev = alloc_ofw_platform_device(np);
 
             if (pdev)
@@ -244,6 +252,16 @@ rt_err_t rt_platform_ofw_request(struct rt_ofw_node *np)
                 LOG_D("%s register to bus", np->full_name);
 
                 err = rt_platform_device_register(pdev);
+
+                if (!err && np->child && (id = rt_ofw_node_match(np, platform_ofw_ids)))
+                {
+                    rt_err_t sub_err;
+
+                    if ((sub_err = platform_ofw_device_probe_once(np)))
+                    {
+                        LOG_W("%s child platform device probe failed", np->full_name);
+                    }
+                }
             }
             else
             {
diff --git a/components/drivers/include/drivers/core/bus.h b/components/drivers/include/drivers/core/bus.h
index ab821240bb..bef8421eaf 100644
--- a/components/drivers/include/drivers/core/bus.h
+++ b/components/drivers/include/drivers/core/bus.h
@@ -41,6 +41,7 @@ rt_err_t rt_bus_for_each_drv(rt_bus_t bus, void *data, int (*fn)(rt_driver_t drv
 
 rt_err_t rt_bus_add_driver(rt_bus_t bus, rt_driver_t drv);
 rt_err_t rt_bus_add_device(rt_bus_t bus, rt_device_t dev);
+rt_err_t rt_bus_probe_device(rt_device_t dev);
 rt_err_t rt_bus_remove_driver(rt_driver_t drv);
 rt_err_t rt_bus_remove_device(rt_device_t dev);