2 files changed, 39 insertions, 0 deletions
diff --git a/include/linux/apple-mailbox.h b/include/linux/apple-mailbox.h
new file mode 100644
index 000000000000..720fbb70294a
--- /dev/null
+++ b/include/linux/apple-mailbox.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+/*
+ * Apple mailbox message format
+ *
+ * Copyright (C) 2021 The Asahi Linux Contributors
+ */
+
+#ifndef _LINUX_APPLE_MAILBOX_H_
+#define _LINUX_APPLE_MAILBOX_H_
+
+#include <linux/types.h>
+
+/* encodes a single 96bit message sent over the single channel */
+struct apple_mbox_msg {
+	u64 msg0;
+	u32 msg1;
+};
+
+#endif
diff --git a/include/linux/firmware/imx/s4.h b/include/linux/firmware/imx/s4.h
new file mode 100644
index 000000000000..9e34923ae1d6
--- /dev/null
+++ b/include/linux/firmware/imx/s4.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2021 NXP
+ *
+ * Header file for the IPC implementation.
+ */
+
+#ifndef _S4_IPC_H
+#define _S4_IPC_H
+
+struct imx_s4_ipc;
+
+struct imx_s4_rpc_msg {
+	uint8_t ver;
+	uint8_t size;
+	uint8_t cmd;
+	uint8_t tag;
+} __packed;
+
+#endif /* _S4_IPC_H */