diff --git a/drivers/net/phy/microchip.c b/drivers/net/phy/microchip.c
index 131caf659ed2..ccecee2524ce 100644
--- a/drivers/net/phy/microchip.c
+++ b/drivers/net/phy/microchip.c
@@ -345,6 +345,10 @@ static int lan88xx_config_aneg(struct phy_device *phydev)
 static struct phy_driver microchip_phy_driver[] = {
 {
 	.phy_id		= 0x0007c132,
+	/* This mask (0xfffffff2) is to differentiate from
+	 * LAN8742 (phy_id 0x0007c130 and 0x0007c131)
+	 * and allows future phy_id revisions.
+	 */
 	.phy_id_mask	= 0xfffffff2,
 	.name		= "Microchip LAN88xx",