diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 972da5d..c3c8ceb 100755
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -80,6 +80,7 @@
 #define DIV_PERIC4		0x10568
 #define SCLK_DIV_ISP0		0x10580
 #define SCLK_DIV_ISP1		0x10584
+#define DIV2_RATIO0		0x10590
 #define GATE_BUS_TOP		0x10700
 #define GATE_BUS_FSYS0		0x10740
 #define GATE_BUS_PERIC		0x10750
@@ -165,6 +166,7 @@ static unsigned long exynos5420_clk_regs[] __initdata = {
 	DIV_PERIC4,
 	SCLK_DIV_ISP0,
 	SCLK_DIV_ISP1,
+	DIV2_RATIO0,
 	GATE_BUS_TOP,
 	GATE_BUS_FSYS0,
 	GATE_BUS_PERIC,
@@ -572,6 +574,11 @@ static struct samsung_div_clock exynos5420_div_clks[] __initdata = {
 	DIV(0, "dout_pre_spi1", "dout_spi1", DIV_PERIC4, 16, 8),
 	DIV(0, "dout_pre_spi2", "dout_spi2", DIV_PERIC4, 24, 8),
 
+	/* GSCL Block */
+	DIV(0, "dout_gscl_blk_300", "mout_user_aclk300_gscl",
+		DIV2_RATIO0, 4, 2),
+	DIV(0, "dout_gscl_blk_333", "aclk333_432_gscl", DIV2_RATIO0, 6, 2),
+
 	/* ISP Block */
 	DIV(0, "dout_aclk400_isp", "mout_aclk400_isp", DIV_TOP0, 0, 3),
 	DIV(0, "dout_aclk333_432_isp0", "mout_aclk333_432_isp0",
@@ -666,9 +673,9 @@ static struct samsung_gate_clock exynos5420_gate_clks[] __initdata = {
 	GATE(CLK_SCLK_USBD301, "sclk_unipro", "dout_unipro",
 		SRC_MASK_FSYS, 24, CLK_SET_RATE_PARENT, 0),
 
-	GATE(CLK_SCLK_GSCL_WA, "sclk_gscl_wa", "aclK333_432_gscl",
+	GATE(CLK_SCLK_GSCL_WA, "sclk_gscl_wa", "mout_user_aclk333_432_gscl",
 		GATE_TOP_SCLK_GSCL, 6, CLK_SET_RATE_PARENT, 0),
-	GATE(CLK_SCLK_GSCL_WB, "sclk_gscl_wb", "aclk333_432_gscl",
+	GATE(CLK_SCLK_GSCL_WB, "sclk_gscl_wb", "mout_user_aclk333_432_gscl",
 		GATE_TOP_SCLK_GSCL, 7, CLK_SET_RATE_PARENT, 0),
 
 	/* Display */
@@ -766,22 +773,25 @@ static struct samsung_gate_clock exynos5420_gate_clks[] __initdata = {
 
 	GATE(CLK_GSCL0, "gscl0", "aclk300_gscl", GATE_IP_GSCL0, 0, 0, 0),
 	GATE(CLK_GSCL1, "gscl1", "aclk300_gscl", GATE_IP_GSCL0, 1, 0, 0),
-	GATE(CLK_CLK_3AA, "clk_3aa", "aclk300_gscl", GATE_IP_GSCL0, 4, 0, 0),
+	GATE(CLK_FIMC_3AA, "fimc_3aa", "aclk333_432_gscl",
+			GATE_IP_GSCL0, 4, 0, 0),
 
-	GATE(CLK_SMMU_3AA, "smmu_3aa", "aclk333_432_gscl", GATE_IP_GSCL1, 2, 0,
-		0),
-	GATE(CLK_SMMU_FIMCL0, "smmu_fimcl0", "aclk333_432_gscl",
+	GATE(CLK_SMMU_3AA, "smmu_3aa", "dout_gscl_blk_333",
+			GATE_IP_GSCL1, 2, 0, 0),
+	GATE(CLK_SMMU_FIMCL0, "smmu_fimcl0", "dout_gscl_blk_333",
 			GATE_IP_GSCL1, 3, 0, 0),
-	GATE(CLK_SMMU_FIMCL1, "smmu_fimcl1", "aclk333_432_gscl",
+	GATE(CLK_SMMU_FIMCL1, "smmu_fimcl1", "dout_gscl_blk_333",
 			GATE_IP_GSCL1, 4, 0, 0),
-	GATE(CLK_SMMU_GSCL0, "smmu_gscl0", "aclk300_gscl", GATE_IP_GSCL1, 6, 0,
-		0),
-	GATE(CLK_SMMU_GSCL1, "smmu_gscl1", "aclk300_gscl", GATE_IP_GSCL1, 7, 0,
-		0),
-	GATE(CLK_GSCL_WA, "gscl_wa", "aclk300_gscl", GATE_IP_GSCL1, 12, 0, 0),
-	GATE(CLK_GSCL_WB, "gscl_wb", "aclk300_gscl", GATE_IP_GSCL1, 13, 0, 0),
-	GATE(CLK_SMMU_FIMCL3, "smmu_fimcl3,", "aclk333_432_gscl",
+	GATE(CLK_SMMU_GSCL0, "smmu_gscl0", "dout_gscl_blk_300",
+			GATE_IP_GSCL1, 6, 0, 0),
+	GATE(CLK_SMMU_GSCL1, "smmu_gscl1", "dout_gscl_blk_300",
+			GATE_IP_GSCL1, 7, 0, 0),
+	GATE(CLK_GSCL_WA, "gscl_wa", "sclk_gscl_wa", GATE_IP_GSCL1, 12, 0, 0),
+	GATE(CLK_GSCL_WB, "gscl_wb", "sclk_gscl_wb", GATE_IP_GSCL1, 13, 0, 0),
+	GATE(CLK_SMMU_FIMCL3, "smmu_fimcl3,", "dout_gscl_blk_333",
 			GATE_IP_GSCL1, 16, 0, 0),
+	GATE(0, "fimc_lite0", "aclk333_432_gscl", GATE_IP_GSCL0, 5, 0, 0),
+	GATE(0, "fimc_lite1", "aclk333_432_gscl", GATE_IP_GSCL0, 6, 0, 0),
 	GATE(CLK_FIMC_LITE3, "fimc_lite3", "aclk333_432_gscl",
 			GATE_IP_GSCL1, 17, 0, 0),
 
@@ -818,6 +828,9 @@ static struct samsung_gate_clock exynos5420_gate_clks[] __initdata = {
 		0),
 	GATE(CLK_SMMU_MIXER, "smmu_mixer", "aclk200_disp1", GATE_IP_DISP1, 9, 0,
 		0),
+	/* gating of aclk300_gscl causes system hang. It should not be gated. */
+	GATE(CLK_ACLK400_MSCL, "aclk400_mscl", "mout_user_aclk400_mscl",
+			GATE_BUS_TOP, 17, CLK_IGNORE_UNUSED, 0),
 	GATE(0, "aclk266_isp", "mout_user_aclk266_isp",
 			GATE_BUS_TOP, 13, 0, 0),
 	GATE(0, "aclk400_isp", "mout_user_aclk400_isp",
diff --git a/include/dt-bindings/clock/exynos5420.h b/include/dt-bindings/clock/exynos5420.h
index 5eefd88..223925f 100644
--- a/include/dt-bindings/clock/exynos5420.h
+++ b/include/dt-bindings/clock/exynos5420.h
@@ -159,7 +159,7 @@
 #define CLK_GSCL_WB		464
 #define CLK_GSCL0		465
 #define CLK_GSCL1		466
-#define CLK_CLK_3AA		467
+#define CLK_FIMC_3AA		467
 #define CLK_ACLK266_G2D		470
 #define CLK_SSS			471
 #define CLK_SLIM_SSS		472
