diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
index aa63bd7..27b35c7 100644
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -864,6 +864,18 @@ static int mtk_pcie_probe(struct platform_device *pdev)
 	struct pci_host_bridge *host;
 	int err;
 
+	void __iomem *clk_base;
+	clk_base = ioremap(0x10001000, 0x100);
+	writel_relaxed((readl_relaxed(clk_base + 0x64) | 0xf000), (clk_base + 0x64));
+	writel_relaxed(0x780, (clk_base + 0x14));
+	iounmap(clk_base);
+
+	void __iomem *srampower_base;
+	srampower_base = ioremap(0x10003000, 0x100);
+	writel_relaxed(0x0, (srampower_base + 0x30));
+	writel_relaxed(0x7, (srampower_base + 0x1c));
+	iounmap(srampower_base);
+
 	host = devm_pci_alloc_host_bridge(dev, sizeof(*port));
 	if (!host)
 		return -ENOMEM;