diff --git a/drivers/phy/mscc/phy-ocelot-serdes.c b/drivers/phy/mscc/phy-ocelot-serdes.c
index b2be54680cf7..cbb49d9da6f9 100644
--- a/drivers/phy/mscc/phy-ocelot-serdes.c
+++ b/drivers/phy/mscc/phy-ocelot-serdes.c
@@ -206,7 +206,7 @@ static struct phy *serdes_simple_xlate(struct device *dev,
 	port = args->args[0];
 	idx = args->args[1];
 
-	for (i = 0; i <= SERDES_MAX; i++) {
+	for (i = 0; i < SERDES_MAX; i++) {
 		struct serdes_macro *macro = phy_get_drvdata(ctrl->phys[i]);
 
 		if (idx != macro->idx)
@@ -260,7 +260,7 @@ static int serdes_probe(struct platform_device *pdev)
 	if (IS_ERR(ctrl->regs))
 		return PTR_ERR(ctrl->regs);
 
-	for (i = 0; i <= SERDES_MAX; i++) {
+	for (i = 0; i < SERDES_MAX; i++) {
 		ret = serdes_phy_create(ctrl, i, &ctrl->phys[i]);
 		if (ret)
 			return ret;
diff --git a/include/dt-bindings/phy/phy-ocelot-serdes.h b/include/dt-bindings/phy/phy-ocelot-serdes.h
index bd28f21206f6..fe70adaca68f 100644
--- a/include/dt-bindings/phy/phy-ocelot-serdes.h
+++ b/include/dt-bindings/phy/phy-ocelot-serdes.h
@@ -7,6 +7,6 @@
 #define SERDES1G_MAX	SERDES1G(5)
 #define SERDES6G(x)	(SERDES1G_MAX + 1 + (x))
 #define SERDES6G_MAX	SERDES6G(2)
-#define SERDES_MAX	SERDES6G_MAX
+#define SERDES_MAX	(SERDES6G_MAX + 1)
 
 #endif