bbu: Add function to check if an update handler exists

This adds a function to check for the existence of an update handler
based on the supplied bbu_data.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 14 insertions, 0 deletions

diff --git a/common/bbu.c b/common/bbu.c
index bf3790d13f..a7f6b4b851 100644
--- a/common/bbu.c
+++ b/common/bbu.c
@@ -111,6 +111,20 @@ static struct bbu_handler *bbu_find_handler_by_device(const char *devicepath)
 	return NULL;
 }
 
+bool barebox_update_handler_exists(struct bbu_data *data)
+{
+	struct bbu_handler *handler;
+
+	handler = bbu_find_handler_by_device(data->devicefile);
+	if (handler)
+		return true;
+
+	if (!data->handler_name)
+		return false;
+
+	return !bbu_find_handler(data->handler_name);
+}
+
 /*
  * do a barebox update with data from *data
  */