diff --git a/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml b/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
index 6d9de3303762..b3492a9aa4ef 100644
--- a/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
+++ b/Documentation/devicetree/bindings/net/thead,th1520-gmac.yaml
@@ -62,11 +62,13 @@ properties:
     items:
       - description: GMAC main clock
       - description: Peripheral registers interface clock
+      - description: APB glue registers interface clock
 
   clock-names:
     items:
       - const: stmmaceth
       - const: pclk
+      - const: apb
 
   interrupts:
     items:
@@ -88,8 +90,8 @@ examples:
         compatible = "thead,th1520-gmac", "snps,dwmac-3.70a";
         reg = <0xe7070000 0x2000>, <0xec003000 0x1000>;
         reg-names = "dwmac", "apb";
-        clocks = <&clk 1>, <&clk 2>;
-        clock-names = "stmmaceth", "pclk";
+        clocks = <&clk 1>, <&clk 2>, <&clk 3>;
+        clock-names = "stmmaceth", "pclk", "apb";
         interrupts = <66>;
         interrupt-names = "macirq";
         phy-mode = "rgmii-id";
diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index 42724bf7e90e..03f1d7319049 100644
--- a/arch/riscv/boot/dts/thead/th1520.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -297,8 +297,9 @@
 			reg-names = "dwmac", "apb";
 			interrupts = <67 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
-			clocks = <&clk CLK_GMAC_AXI>, <&clk CLK_GMAC1>;
-			clock-names = "stmmaceth", "pclk";
+			clocks = <&clk CLK_GMAC_AXI>, <&clk CLK_GMAC1>,
+				 <&clk CLK_PERISYS_APB4_HCLK>;
+			clock-names = "stmmaceth", "pclk", "apb";
 			snps,pbl = <32>;
 			snps,fixed-burst;
 			snps,multicast-filter-bins = <64>;
@@ -319,8 +320,9 @@
 			reg-names = "dwmac", "apb";
 			interrupts = <66 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
-			clocks = <&clk CLK_GMAC_AXI>, <&clk CLK_GMAC0>;
-			clock-names = "stmmaceth", "pclk";
+			clocks = <&clk CLK_GMAC_AXI>, <&clk CLK_GMAC0>,
+				 <&clk CLK_PERISYS_APB4_HCLK>;
+			clock-names = "stmmaceth", "pclk", "apb";
 			snps,pbl = <32>;
 			snps,fixed-burst;
 			snps,multicast-filter-bins = <64>;
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
index c72ee759aae5..f2946bea0bc2 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c
@@ -211,6 +211,7 @@ static int thead_dwmac_probe(struct platform_device *pdev)
 	struct stmmac_resources stmmac_res;
 	struct plat_stmmacenet_data *plat;
 	struct thead_dwmac *dwmac;
+	struct clk *apb_clk;
 	void __iomem *apb;
 	int ret;
 
@@ -224,6 +225,19 @@ static int thead_dwmac_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(plat),
 				     "dt configuration failed\n");
 
+	/*
+	 * The APB clock is essential for accessing glue registers. However,
+	 * old devicetrees don't describe it correctly. We continue to probe
+	 * and emit a warning if it isn't present.
+	 */
+	apb_clk = devm_clk_get_enabled(&pdev->dev, "apb");
+	if (PTR_ERR(apb_clk) == -ENOENT)
+		dev_warn(&pdev->dev,
+			 "cannot get apb clock, link may break after speed changes\n");
+	else if (IS_ERR(apb_clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(apb_clk),
+				     "failed to get apb clock\n");
+
 	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
 	if (!dwmac)
 		return -ENOMEM;