net: dsa: mv88e6xxx: Fix stats counters for 6352 family

The statistic counters for the mv88e6172 never worked. This device is a member of the 6352 family of chips, which has a slightly different layout of the register used for capturing statistics. Add support for detecting this family and poking the port in the right place in the register. Signed-off-by: Andrew Lunn <[email protected]> Tested-by: Guenter Roeck <[email protected]> Reviewed-by: Guenter Roeck <[email protected]> Signed-off-by: David S. Miller <[email protected]>
libos-nuse · Apr 2, 2015 · f3a8b6b · f3a8b6b
1 parent cca8b13
commit f3a8b6b
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
@@ -434,6 +434,19 @@ void mv88e6xxx_poll_link(struct dsa_switch *ds)
 	}
 }
 
+static bool mv88e6xxx_6352_family(struct dsa_switch *ds)
+{
+	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
+
+	switch (ps->id) {
+	case PORT_SWITCH_ID_6352:
+	case PORT_SWITCH_ID_6172:
+	case PORT_SWITCH_ID_6176:
+		return true;
+	}
+	return false;
+}
+
 static int mv88e6xxx_stats_wait(struct dsa_switch *ds)
 {
 	int ret;
@@ -452,6 +465,9 @@ static int mv88e6xxx_stats_snapshot(struct dsa_switch *ds, int port)
 {
 	int ret;
 
+	if (mv88e6xxx_6352_family(ds))
+		port = (port + 1) << 5;
+
 	/* Snapshot the hardware statistics counters for this port. */
 	REG_WRITE(REG_GLOBAL, GLOBAL_STATS_OP,
 		  GLOBAL_STATS_OP_CAPTURE_PORT |