auxdisplay: charlcd: add include guard to charlcd.h

Add a header include guard just in case.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>

diff --git a/drivers/auxdisplay/charlcd.h b/drivers/auxdisplay/charlcd.h
index 8cf6c18b0adbd7abed3a0fd122f413a23ebc1665..00911ad0f3debeb15e735768b1683869b662b986 100644 (file)
--- a/drivers/auxdisplay/charlcd.h
+++ b/drivers/auxdisplay/charlcd.h
@@ -6,6 +6,9 @@
  * Copyright (C) 2016-2017 Glider bvba
  */
 
+#ifndef _CHARLCD_H
+#define _CHARLCD_H
+
 struct charlcd {
        const struct charlcd_ops *ops;
        const unsigned char *char_conv; /* Optional */
@@ -37,3 +40,5 @@ int charlcd_register(struct charlcd *lcd);
 int charlcd_unregister(struct charlcd *lcd);
 
 void charlcd_poke(struct charlcd *lcd);
+
+#endif /* CHARLCD_H */