dm: core: Add a function to look up a uclass by name

Each uclass has a driver name which we can use to look up the uclass. This
is useful for logging, where the uclass ID is used as the category.

Add a function to handle this, as well as a test.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c
index f5e4067..1aedaa0 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -158,6 +158,20 @@ const char *uclass_get_name(enum uclass_id id)
 	return uc->uc_drv->name;
 }
 
+enum uclass_id uclass_get_by_name(const char *name)
+{
+	int i;
+
+	for (i = 0; i < UCLASS_COUNT; i++) {
+		struct uclass_driver *uc_drv = lists_uclass_lookup(i);
+
+		if (uc_drv && !strcmp(uc_drv->name, name))
+			return i;
+	}
+
+	return UCLASS_INVALID;
+}
+
 int uclass_find_device(enum uclass_id id, int index, struct udevice **devp)
 {
 	struct uclass *uc;