diff --git a/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c b/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c
index 8edfa71ad08c..48464ad10393 100644
--- a/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c
@@ -217,6 +217,8 @@
 #define RX_S0D3_DESKEW_CON0		(0xF40)
 #define RX_S0D3_DESKEW_CON2		(0xF48)
 #define RX_S0D3_DESKEW_CON4		(0xF50)
+#define RX_S0D3_ADI_STAT0		(0XFEC)
+#define MIPI_DCPHY_MAX_REGISGER		RX_S0D3_ADI_STAT0
 
 struct samsung_mipi_dphy_timing {
 	unsigned int max_lane_mbps;
@@ -2363,7 +2365,7 @@ static const struct regmap_config samsung_mipi_dcphy_regmap_config = {
 	.reg_bits = 32,
 	.val_bits = 32,
 	.reg_stride = 4,
-	.max_register = 0x10000,
+	.max_register = MIPI_DCPHY_MAX_REGISGER,
 };
 
 static int samsung_mipi_dcphy_probe(struct platform_device *pdev)