macintosh/ams/ams: Add header file macro definition

Add header file macro definition.

Signed-off-by: Li zeming <zeming@nfschina.com>
[mpe: Add endif comment]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220707015352.3391-1-zeming@nfschina.com

diff --git a/drivers/macintosh/ams/ams.h b/drivers/macintosh/ams/ams.h
index 935bdd9cd9a63c3b6915ac6d53cfa1234d35f369..2c159c8844c198cfcba9ee032b4c717e5deeb37e 100644 (file)
--- a/drivers/macintosh/ams/ams.h
+++ b/drivers/macintosh/ams/ams.h
@@ -1,4 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _AMS_H
+#define _AMS_H
+
 #include <linux/i2c.h>
 #include <linux/input.h>
 #include <linux/kthread.h>
@@ -69,3 +72,5 @@ extern int ams_i2c_init(struct device_node *np);
 
 extern int ams_input_init(void);
 extern void ams_input_exit(void);
+
+#endif /* _AMS_H */