diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 0032d4e..0fed43b 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -903,8 +903,12 @@
 		config = GEM_BF(CLK, GEM_CLK_DIV48);
 	else if (macb_hz < 160000000)
 		config = GEM_BF(CLK, GEM_CLK_DIV64);
-	else
+	else if (macb_hz < 240000000)
 		config = GEM_BF(CLK, GEM_CLK_DIV96);
+	else if (macb_hz < 320000000)
+		config = GEM_BF(CLK, GEM_CLK_DIV128);
+	else
+		config = GEM_BF(CLK, GEM_CLK_DIV224);
 
 	return config;
 }