diff --git a/arch/arm/plat-s5p/include/plat/mipi_csis.h b/arch/arm/plat-s5p/include/plat/mipi_csis.h
index 8b3ada8..9bd254c 100644
--- a/arch/arm/plat-s5p/include/plat/mipi_csis.h
+++ b/arch/arm/plat-s5p/include/plat/mipi_csis.h
@@ -11,18 +11,33 @@
 #ifndef PLAT_S5P_MIPI_CSIS_H_
 #define PLAT_S5P_MIPI_CSIS_H_ __FILE__
 
+struct platform_device;
+
 /**
  * struct s5p_platform_mipi_csis - platform data for S5P MIPI-CSIS driver
  * @clk_rate: bus clock frequency
  * @lanes: number of data lanes used
  * @alignment: data alignment in bits
  * @hs_settle: HS-RX settle time
+ * @fixed_phy_vdd: false to enable external D-PHY regulator management in the
+ *		   driver or true in case this regulator has no enable function
+ * @phy_enable: pointer to a callback controlling D-PHY enable/reset
  */
 struct s5p_platform_mipi_csis {
 	unsigned long clk_rate;
 	u8 lanes;
 	u8 alignment;
 	u8 hs_settle;
+	bool fixed_phy_vdd;
+	int (*phy_enable)(struct platform_device *pdev, bool on);
 };
 
+/**
+ * s5p_csis_phy_enable - global MIPI-CSI receiver D-PHY control
+ * @pdev: MIPI-CSIS platform device
+ * @on: true to enable D-PHY and deassert its reset
+ *	false to disable D-PHY
+ */
+int s5p_csis_phy_enable(struct platform_device *pdev, bool on);
+
 #endif /* PLAT_S5P_MIPI_CSIS_H_ */