diff --git a/target/linux/mediatek/patches-5.4/999-2614-tphy-one-setting-of-TTSSC-Freq-Dev-for-all-IC-cases.patch b/target/linux/mediatek/patches-5.4/999-2614-tphy-one-setting-of-TTSSC-Freq-Dev-for-all-IC-cases.patch
new file mode 100644
index 0000000..ef3b3a6
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/999-2614-tphy-one-setting-of-TTSSC-Freq-Dev-for-all-IC-cases.patch
@@ -0,0 +1,82 @@
+From a977dbd79bc888d32fb974f328efa650722590c2 Mon Sep 17 00:00:00 2001
+From: Sam Shih <sam.shih@mediatek.com>
+Date: Fri, 2 Jun 2023 13:06:26 +0800
+Subject: [PATCH] 
+ [high-speed-io][999-2614-tphy-one-setting-of-TTSSC-Freq-Dev-for-all-IC-cases.patch]
+
+---
+ drivers/phy/mediatek/phy-mtk-tphy.c | 37 +++++++++++++++++++++++++++++
+ 1 file changed, 37 insertions(+)
+
+diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
+index 149464f37..e7ed93799 100644
+--- a/drivers/phy/mediatek/phy-mtk-tphy.c
++++ b/drivers/phy/mediatek/phy-mtk-tphy.c
+@@ -221,6 +221,14 @@
+ #define P3D_RG_RXDET_STB2_SET_P3	GENMASK(8, 0)
+ #define P3D_RG_RXDET_STB2_SET_P3_VAL(x)	(0x1ff & (x))
+ 
++#define U3P_U3_PHYD_REG19		0x338
++#define P3D_RG_PLL_SSC_DELTA1           GENMASK(15, 0)
++#define P3D_RG_PLL_SSC_DELTA1_VAL(x)	(0xffff & (x))
++
++#define U3P_U3_PHYD_REG21		0x340
++#define P3D_RG_PLL_SSC_DELTA            GENMASK(31, 16)
++#define P3D_RG_PLL_SSC_DELTA_VAL(x)	((0xffff & (x)) << 16)
++
+ #define U3P_SPLLC_XTALCTL3		0x018
+ #define XC3_RG_U3_XTAL_RX_PWD		BIT(9)
+ #define XC3_RG_U3_FRC_XTAL_RX_PWD	BIT(8)
+@@ -378,6 +386,8 @@ struct mtk_phy_instance {
+ 	int eye_vrt;
+ 	int eye_term;
+ 	bool bc12_en;
++	bool u3_pll_ssc_delta;
++	bool u3_pll_ssc_delta1;
+ };
+ 
+ struct mtk_tphy {
+@@ -520,6 +530,20 @@ static void u3_phy_instance_init(struct mtk_tphy *tphy,
+ 	tmp |= P3D_RG_RXDET_STB2_SET_P3_VAL(0x10);
+ 	writel(tmp, u3_banks->phyd + U3P_U3_PHYD_RXDET2);
+ 
++	if (instance->u3_pll_ssc_delta1) {
++		tmp = readl(u3_banks->phyd + U3P_U3_PHYD_REG19);
++		tmp &= ~P3D_RG_PLL_SSC_DELTA1;
++		tmp |= P3D_RG_PLL_SSC_DELTA1_VAL(0x1c3);
++		writel(tmp, u3_banks->phyd + U3P_U3_PHYD_REG19);
++	}
++
++	if (instance->u3_pll_ssc_delta) {
++		tmp = readl(u3_banks->phyd + U3P_U3_PHYD_REG21);
++		tmp &= ~P3D_RG_PLL_SSC_DELTA;
++		tmp |= P3D_RG_PLL_SSC_DELTA_VAL(0x1c3);
++		writel(tmp, u3_banks->phyd + U3P_U3_PHYD_REG21);
++	}
++
+ 	dev_dbg(tphy->dev, "%s(%d)\n", __func__, instance->index);
+ }
+ 
+@@ -952,6 +976,19 @@ static void phy_parse_property(struct mtk_tphy *tphy,
+ {
+ 	struct device *dev = &instance->phy->dev;
+ 
++	if (instance->type == PHY_TYPE_USB3) {
++		instance->u3_pll_ssc_delta =
++			device_property_read_bool(dev,
++				"mediatek,usb3-pll-ssc-delta");
++		instance->u3_pll_ssc_delta1 =
++			device_property_read_bool(dev,
++				"mediatek,usb3-pll-ssc-delta1");
++
++		dev_dbg(dev, "u3_pll_ssc_delta:%i, u3_pll_ssc_delta1:%i\n",
++					instance->u3_pll_ssc_delta,
++					instance->u3_pll_ssc_delta1);
++	}
++
+ 	if (instance->type != PHY_TYPE_USB2)
+ 		return;
+ 
+-- 
+2.34.1
+