treewide: Fix typo in Documentation/DocBook
This patch fix spelling typo in Documentation/DocBook.
It is because .html and .xml files are generated by make htmldocs,
I have to fix a typo within the source files.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index d85f313..d59aa96 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2134,7 +2134,7 @@
* @regulator: regulator source
*
* Returns positive if the regulator driver backing the source/client
- * can change its voltage, false otherwise. Usefull for detecting fixed
+ * can change its voltage, false otherwise. Useful for detecting fixed
* or dummy regulators and disabling voltage change logic in the client
* driver.
*/