From: Andrew Lunn Date: Thu, 2 Apr 2015 02:06:40 +0000 (+0200) Subject: net: dsa: mv88e6xxx: Fix stats counters for 6352 family X-Git-Tag: v5.15~15978^2~87^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f3a8b6b6a155210dac1f2a6ec4eb1b9ad04219df;p=platform%2Fkernel%2Flinux-starfive.git 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 --- diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 488b654..fc8d3b6 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 |