diff --git a/arch/arm/dts/ipq807x-hk10.dts b/arch/arm/dts/ipq807x-hk10.dts
index d8800de1d6..aa9947beb3 100644
--- a/arch/arm/dts/ipq807x-hk10.dts
+++ b/arch/arm/dts/ipq807x-hk10.dts
@@ -31,6 +31,7 @@
 		switch_mac_mode2 = <0x6>;
 		napa_gpio = <25 44>;
 		napa_gpio_cnt = <2>;
+		uniphy_ext_ref_clk;
 		port_phyinfo {
 			port@0 {
 				phy_address = <0>;
diff --git a/board/qca/arm/ipq807x/ipq807x.c b/board/qca/arm/ipq807x/ipq807x.c
index fa2dce3228..b6ac0a2f23 100644
--- a/board/qca/arm/ipq807x/ipq807x.c
+++ b/board/qca/arm/ipq807x/ipq807x.c
@@ -424,7 +424,20 @@ void aquantia_phy_reset_init_done(void)
 		gpio_set_value(aquantia_gpio, 0x1);
 	}
 }
-
+void check_uniphy_ext_ref_clk(void)
+{
+	int node;
+	node = fdt_path_offset(gd->fdt_blob, "/ess-switch");
+	if (node >= 0) {
+		if(fdtdec_get_bool(gd->fdt_blob, node, "uniphy_ext_ref_clk")){
+			printf("External ref clk setting found... \n");
+			writel(PLL_REF_CLKSEL_50M, PLL_REFERENCE_CLOCK); /*0x8218 - 50M 0x8017 - 48M(default)*/
+			writel(ANA_EN_SW_RSTN_DIS, PLL_POWER_ON_AND_RESET);	/*give reset*/
+			mdelay(1);
+			writel(ANA_EN_SW_RSTN_EN, PLL_POWER_ON_AND_RESET);
+		}
+	}
+}
 void eth_clock_enable(void)
 {
 	int tlmm_base = 0x1025000;
@@ -482,6 +495,9 @@ void eth_clock_enable(void)
 	 * these clk init will be moved to sbl later
 	 */
 
+	/*this is for ext oscillator clk for ref clk-*/
+	check_uniphy_ext_ref_clk();
+
 	/* bring phy out of reset */
 	writel(7, tlmm_base + 0x1f000);
 	writel(7, tlmm_base + 0x20000);
diff --git a/board/qca/arm/ipq807x/ipq807x.h b/board/qca/arm/ipq807x/ipq807x.h
index c161dd48f3..dd128e7c59 100644
--- a/board/qca/arm/ipq807x/ipq807x.h
+++ b/board/qca/arm/ipq807x/ipq807x.h
@@ -232,6 +232,16 @@
 #define ARM_PSCI_TZ_FN_CPU_ON		ARM_PSCI_TZ_FN(3)
 #define ARM_PSCI_TZ_FN_AFFINITY_INFO	ARM_PSCI_TZ_FN(4)
 
+/*CMN BLOCK REG*/
+#define PLL_REFERENCE_CLOCK		0x0009B784
+#define PLL_POWER_ON_AND_RESET		0x0009B780
+
+/*0x8218 - 50M 0x8017 - 48M(default)*/
+#define PLL_REF_CLKSEL_50M		0x8218
+
+#define ANA_EN_SW_RSTN_DIS		0xBF
+#define ANA_EN_SW_RSTN_EN		0xFF
+
 unsigned int __invoke_psci_fn_smc(unsigned int, unsigned int,
 					 unsigned int, unsigned int);