diff --git a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
index bc88a44aa7..45817e171a 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
@@ -634,6 +634,24 @@ static int __init ath79_setup_phy_if_mode(unsigned int id,
 	return 0;
 }
 
+void __init ath79_setup_ar933x_phy4_switch(bool mac, bool mdio)
+{
+	void __iomem *base;
+	u32 t;
+
+	base = ioremap(AR933X_GMAC_BASE, AR933X_GMAC_SIZE);
+
+	t = __raw_readl(base + AR933X_GMAC_REG_ETH_CFG);
+	t &= ~(AR933X_ETH_CFG_SW_PHY_SWAP | AR933X_ETH_CFG_SW_PHY_ADDR_SWAP);
+	if (mac)
+		t |= AR933X_ETH_CFG_SW_PHY_SWAP;
+	if (mdio)
+		t |= AR933X_ETH_CFG_SW_PHY_ADDR_SWAP;
+	__raw_writel(t, base + AR933X_GMAC_REG_ETH_CFG);
+
+	iounmap(base);
+}
+
 static int ath79_eth_instance __initdata;
 void __init ath79_register_eth(unsigned int id)
 {
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.h b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.h
index 4c010ef74e..d4f27d9cf2 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.h
@@ -43,4 +43,6 @@ extern struct platform_device ath79_mdio0_device;
 extern struct platform_device ath79_mdio1_device;
 void ath79_register_mdio(unsigned int id, u32 phy_mask);
 
+void ath79_setup_ar933x_phy4_switch(bool mac, bool mdio);
+
 #endif /* _ATH79_DEV_ETH_H */
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr741nd-v4.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr741nd-v4.c
index 214429cd54..0d758913f3 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr741nd-v4.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-tl-wr741nd-v4.c
@@ -100,26 +100,12 @@ static struct gpio_keys_button tl_wr741ndv4_gpio_keys[] __initdata = {
 	}
 };
 
-static void __init tl_wr741ndv4_gmac_setup(void)
-{
-	void __iomem *base;
-	u32 t;
-
-	base = ioremap(AR933X_GMAC_BASE, AR933X_GMAC_SIZE);
-
-	t = __raw_readl(base + AR933X_GMAC_REG_ETH_CFG);
-	t |= (AR933X_ETH_CFG_SW_PHY_SWAP | AR933X_ETH_CFG_SW_PHY_ADDR_SWAP);
-	__raw_writel(t, base + AR933X_GMAC_REG_ETH_CFG);
-
-	iounmap(base);
-}
-
 static void __init tl_wr741ndv4_setup(void)
 {
 	u8 *mac = (u8 *) KSEG1ADDR(0x1f01fc00);
 	u8 *ee = (u8 *) KSEG1ADDR(0x1fff1000);
 
-	tl_wr741ndv4_gmac_setup();
+	ath79_setup_ar933x_phy4_switch(true, true);
 
 	ath79_gpio_function_disable(AR933X_GPIO_FUNC_ETH_SWITCH_LED0_EN |
 				    AR933X_GPIO_FUNC_ETH_SWITCH_LED1_EN |