diff --git a/drivers/net/dsa/motorcomm/chip.c b/drivers/net/dsa/motorcomm/chip.c
index ea4b29882b5c..f22c37e0b5bc 100644
--- a/drivers/net/dsa/motorcomm/chip.c
+++ b/drivers/net/dsa/motorcomm/chip.c
@@ -3742,7 +3742,8 @@ static int yt921x_port_down(struct yt921x_priv *priv, int port)
 	u32 mask;
 	int res;
 
-	mask = YT921X_PORT_LINK | YT921X_PORT_RX_MAC_EN | YT921X_PORT_TX_MAC_EN;
+	mask = YT921X_PORT_CTRL_LINK_AN | YT921X_PORT_RX_MAC_EN |
+	       YT921X_PORT_TX_MAC_EN;
 	res = yt921x_reg_clear_bits(priv, YT921X_PORTn_CTRL(port), mask);
 	if (res)
 		return res;
diff --git a/drivers/net/dsa/motorcomm/chip.h b/drivers/net/dsa/motorcomm/chip.h
index fd552f7dced4..3fb0c6a69dd8 100644
--- a/drivers/net/dsa/motorcomm/chip.h
+++ b/drivers/net/dsa/motorcomm/chip.h
@@ -42,7 +42,7 @@
 #define YT921X_PVID_SEL			0x80014
 #define  YT921X_PVID_SEL_SVID_PORTn(port)	BIT(port)
 #define YT921X_SERDES_CTRL		0x80028
-#define  YT921X_SERDES_CTRL_PORTn_TEST(port)	BIT((port) - 3)
+#define  YT921X_SERDES_CTRL_TEST		BIT(6)
 #define  YT921X_SERDES_CTRL_PORTn(port)		BIT((port) - 8)
 #define YT921X_IO_LEVEL			0x80030
 #define  YT9215_IO_LEVEL_NORMAL_M		GENMASK(5, 4)
@@ -94,11 +94,12 @@
 #define   YT921X_SERDES_SPEED_1000			YT921X_SERDES_SPEED(2)
 #define   YT921X_SERDES_SPEED_10000			YT921X_SERDES_SPEED(3)
 #define   YT921X_SERDES_SPEED_2500			YT921X_SERDES_SPEED(4)
-#define YT921X_PORTn_CTRL(port)		(0x80100 + 4 * (port))
+#define YT921X_PORTn_CTRL(port)		(0x80100 + 4 * (port))  /* Bit 7-0 shared with PORT_STATUS */
 #define  YT921X_PORT_CTRL_PAUSE_AN		BIT(10)
+#define  YT921X_PORT_CTRL_LINK_AN		BIT(9)
+#define  YT921X_PORT_CTRL_HALF_PAUSE		BIT(8)  /* Half-duplex back pressure mode */
 #define YT921X_PORTn_STATUS(port)	(0x80200 + 4 * (port))
-#define  YT921X_PORT_LINK			BIT(9)  /* CTRL: auto negotiation */
-#define  YT921X_PORT_HALF_PAUSE			BIT(8)  /* Half-duplex back pressure mode */
+#define  YT921X_PORT_LINK			BIT(8)
 #define  YT921X_PORT_DUPLEX_FULL		BIT(7)
 #define  YT921X_PORT_RX_PAUSE			BIT(6)
 #define  YT921X_PORT_TX_PAUSE			BIT(5)