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-rw-r--r--drivers/mailbox/mailbox.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mailbox/mailbox.h b/drivers/mailbox/mailbox.h
index 046d6d258b32..e1ec4efab693 100644
--- a/drivers/mailbox/mailbox.h
+++ b/drivers/mailbox/mailbox.h
@@ -3,6 +3,8 @@
#ifndef __MAILBOX_H
#define __MAILBOX_H
+#include <linux/bits.h>
+
#define TXDONE_BY_IRQ BIT(0) /* controller has remote RTR irq */
#define TXDONE_BY_POLL BIT(1) /* controller can read status of last TX */
#define TXDONE_BY_ACK BIT(2) /* S/W ACK received by Client ticks the TX */