diff --git a/include/dt-bindings/power/r8a774a1-sysc.h b/include/dt-bindings/power/r8a774a1-sysc.h
new file mode 100644
index 000000000000..580f431cd32e
--- /dev/null
+++ b/include/dt-bindings/power/r8a774a1-sysc.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2018 Renesas Electronics Corp.
+ */
+#ifndef __DT_BINDINGS_POWER_R8A774A1_SYSC_H__
+#define __DT_BINDINGS_POWER_R8A774A1_SYSC_H__
+
+/*
+ * These power domain indices match the numbers of the interrupt bits
+ * representing the power areas in the various Interrupt Registers
+ * (e.g. SYSCISR, Interrupt Status Register)
+ */
+
+#define R8A774A1_PD_CA57_CPU0		 0
+#define R8A774A1_PD_CA57_CPU1		 1
+#define R8A774A1_PD_CA53_CPU0		 5
+#define R8A774A1_PD_CA53_CPU1		 6
+#define R8A774A1_PD_CA53_CPU2		 7
+#define R8A774A1_PD_CA53_CPU3		 8
+#define R8A774A1_PD_CA57_SCU		12
+#define R8A774A1_PD_A3VC		14
+#define R8A774A1_PD_3DG_A		17
+#define R8A774A1_PD_3DG_B		18
+#define R8A774A1_PD_CA53_SCU		21
+#define R8A774A1_PD_A2VC0		25
+#define R8A774A1_PD_A2VC1		26
+
+/* Always-on power area */
+#define R8A774A1_PD_ALWAYS_ON		32
+
+#endif /* __DT_BINDINGS_POWER_R8A774A1_SYSC_H__ */