[PATCH net-next 12/13] net: dsa: lantiq_gswip: Add and use a GSWIP_TABLE_MAC_BRIDGE_FID macro

[Martin Schiller <ms@dev.tdt.de>]

From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

Only bits [5:0] in mac_bridge.key[3] are reserved for the FID. Add a
macro so this becomes obvious when reading the driver code.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 drivers/net/dsa/lantiq_gswip.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c
index f2faee112e33..4bb894e75b81 100644
--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -238,6 +238,7 @@
 #define GSWIP_TABLE_MAC_BRIDGE		0x0b
 #define  GSWIP_TABLE_MAC_BRIDGE_STATIC	BIT(0)		/* Static not, aging entry */
 #define  GSWIP_TABLE_MAC_BRIDGE_PORT	GENMASK(7, 4)	/* Port on learned entries */
+#define  GSWIP_TABLE_MAC_BRIDGE_FID	GENMASK(5, 0)	/* Filtering identifier */
 
 #define XRX200_GPHY_FW_ALIGN	(16 * 1024)
 
@@ -1385,7 +1386,7 @@ static int gswip_port_fdb(struct dsa_switch *ds, int port,
 	mac_bridge.key[0] = addr[5] | (addr[4] << 8);
 	mac_bridge.key[1] = addr[3] | (addr[2] << 8);
 	mac_bridge.key[2] = addr[1] | (addr[0] << 8);
-	mac_bridge.key[3] = fid;
+	mac_bridge.key[3] = FIELD_PREP(GSWIP_TABLE_MAC_BRIDGE_FID, fid);
 	mac_bridge.val[0] = add ? BIT(port) : 0; /* port map */
 	mac_bridge.val[1] = GSWIP_TABLE_MAC_BRIDGE_STATIC;
 	mac_bridge.valid = add;
-- 
2.39.2