diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index cd6c5d6f42b5445918f277a2b4168d8f473bfca1..259e2ebed8c14dfdb9318da9be03c5f1dc9b1284 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -48,9 +48,14 @@ static void dwmac4_core_init(struct mac_device_info *hw,
 	value = readl(ioaddr + GMAC_CONFIG);
 	writel(value | GMAC_CORE_INIT, ioaddr + GMAC_CONFIG);
 
-	/* Configure LPI 1us counter to number of CSR clock ticks in 1us - 1 */
+	/* Configure LPI 1us counter to number of CSR clock ticks in 1us - 1.
+	 * Platforms with firmware-managed clocks may not expose the CSR clock
+	 * to linux, in which case there's no meaningful value to program.
+	 */
 	clk_rate = clk_get_rate(priv->plat->stmmac_clk);
-	writel((clk_rate / 1000000) - 1, ioaddr + GMAC4_MAC_ONEUS_TIC_COUNTER);
+	if (clk_rate >= 1000000)
+		writel((clk_rate / 1000000) - 1,
+		       ioaddr + GMAC4_MAC_ONEUS_TIC_COUNTER);
 
 	/* Enable GMAC interrupts */
 	writel(GMAC_INT_DEFAULT_ENABLE, ioaddr + GMAC_INT_EN);