diff --git a/include/dt-bindings/mailbox/qcom-ipcc.h b/include/dt-bindings/mailbox/qcom-ipcc.h
new file mode 100644
index 0000000..fbfa3fe
--- /dev/null
+++ b/include/dt-bindings/mailbox/qcom-ipcc.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/*
+ * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef __DT_BINDINGS_MAILBOX_IPCC_H
+#define __DT_BINDINGS_MAILBOX_IPCC_H
+
+/* Signal IDs for MPROC protocol */
+#define IPCC_MPROC_SIGNAL_GLINK_QMP	0
+#define IPCC_MPROC_SIGNAL_TZ		1
+#define IPCC_MPROC_SIGNAL_SMP2P		2
+#define IPCC_MPROC_SIGNAL_PING		3
+
+/* Client IDs */
+#define IPCC_CLIENT_AOP			0
+#define IPCC_CLIENT_TZ			1
+#define IPCC_CLIENT_MPSS		2
+#define IPCC_CLIENT_LPASS		3
+#define IPCC_CLIENT_SLPI		4
+#define IPCC_CLIENT_SDC			5
+#define IPCC_CLIENT_CDSP		6
+#define IPCC_CLIENT_NPU			7
+#define IPCC_CLIENT_APSS		8
+#define IPCC_CLIENT_GPU			9
+#define IPCC_CLIENT_CVP			10
+#define IPCC_CLIENT_CAM			11
+#define IPCC_CLIENT_VPU			12
+#define IPCC_CLIENT_PCIE0		13
+#define IPCC_CLIENT_PCIE1		14
+#define IPCC_CLIENT_PCIE2		15
+#define IPCC_CLIENT_SPSS		16
+#define IPCC_CLIENT_NSP1		18
+#define IPCC_CLIENT_TME			23
+#define IPCC_CLIENT_WPSS		24
+
+#endif