rcar_gen3: drivers: i2c dvfs

Signed-off-by: ldts <jramirez@baylibre.com>
diff --git a/drivers/renesas/rcar/iic_dvfs/iic_dvfs.h b/drivers/renesas/rcar/iic_dvfs/iic_dvfs.h
new file mode 100644
index 0000000..3c4a9a5
--- /dev/null
+++ b/drivers/renesas/rcar/iic_dvfs/iic_dvfs.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef IIC_DVFS_H__
+#define IIC_DVFS_H__
+
+/* PMIC slave */
+#define PMIC			(0x30)
+#define	BKUP_MODE_CNT		(0x20)
+#define	DVFS_SET_VID		(0x54)
+#define	REG_KEEP10		(0x79)
+
+/* EEPROM slave */
+#define EEPROM			(0x50)
+#define	BOARD_ID		(0x70)
+
+int32_t rcar_iic_dvfs_receive(uint8_t slave, uint8_t reg, uint8_t *data);
+int32_t rcar_iic_dvfs_send(uint8_t slave, uint8_t regr, uint8_t data);
+
+#endif