event: Add events for device probe/remove

Generate events when devices are probed or removed, allowing hooks
to be added for these situations.

This is controlled by the DM_EVENT config option.

Signed-off-by: Simon Glass <[email protected]>

2 files changed, 25 insertions, 0 deletions

diff --git a/include/dm/device-internal.h b/include/dm/device-internal.h
index 02002acb787..c420726287e 100644
--- a/include/dm/device-internal.h
+++ b/include/dm/device-internal.h
@@ -10,6 +10,7 @@
 #ifndef _DM_DEVICE_INTERNAL_H
 #define _DM_DEVICE_INTERNAL_H
 
+#include <event.h>
 #include <linker_lists.h>
 #include <dm/ofnode.h>
 
@@ -426,4 +427,13 @@ static inline void devres_release_all(struct udevice *dev)
 }
 
 #endif /* ! CONFIG_DEVRES */
+
+static inline int device_notify(const struct udevice *dev, enum event_t type)
+{
+#if CONFIG_IS_ENABLED(DM_EVENT)
+	return event_notify(type, &dev, sizeof(dev));
+#else
+	return 0;
+#endif
+}
 #endif
diff --git a/include/event.h b/include/event.h
index effd58c7047..f4c12d768b4 100644
--- a/include/event.h
+++ b/include/event.h
@@ -19,6 +19,12 @@ enum event_t {
 	EVT_NONE,
 	EVT_TEST,
 
+	/* Events related to driver model */
+	EVT_DM_PRE_PROBE,
+	EVT_DM_POST_PROBE,
+	EVT_DM_PRE_REMOVE,
+	EVT_DM_POST_REMOVE,
+
 	EVT_COUNT
 };
 
@@ -31,6 +37,15 @@ union event_data {
 	struct event_data_test {
 		int signal;
 	} test;
+
+	/**
+	 * struct event_dm - driver model event
+	 *
+	 * @dev: Device this event relates to
+	 */
+	struct event_dm {
+		struct udevice *dev;
+	} dm;
 };
 
 /**