driver: implement find_device() helper

For use in commands like done in the follow-up commits, it can be useful
to have a best effort find_device, that not only finds by device name,
but also by device tree path or alias. Add such a helper.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220905103546.1476277-4-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 072870bea4..cbe1c974f4 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -46,6 +46,22 @@ LIST_HEAD(active_device_list);
 EXPORT_SYMBOL(active_device_list);
 static LIST_HEAD(deferred);
 
+struct device_d *find_device(const char *str)
+{
+	struct device_d *dev;
+	struct device_node *np;
+
+	dev = get_device_by_name(str);
+	if (dev)
+		return dev;
+
+	np = of_find_node_by_path_or_alias(NULL, str);
+	if (np)
+		return of_find_device_by_node(np);
+
+	return NULL;
+}
+
 struct device_d *get_device_by_name(const char *name)
 {
 	struct device_d *dev;