From f3a8b6b6a155210dac1f2a6ec4eb1b9ad04219df Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Thu, 2 Apr 2015 04:06:40 +0200 Subject: [PATCH] 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 Tested-by: Guenter Roeck Reviewed-by: Guenter Roeck Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 488b6545dfb5..fc8d3b6ffe8e 100644 --- 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 |