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-rw-r--r--drivers/mailbox/mailbox.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mailbox/mailbox.h b/drivers/mailbox/mailbox.h
new file mode 100644
index 0000000000..046d6d258b
--- /dev/null
+++ b/drivers/mailbox/mailbox.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MAILBOX_H
+#define __MAILBOX_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 */
+
+#endif /* __MAILBOX_H */