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

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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 <andrew@lunn.ch>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2015-04-02 04:06:40 +02:00 committed by David S. Miller
parent cca8b13375
commit f3a8b6b6a1
1 changed files with 16 additions and 0 deletions
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16
drivers/net/dsa/mv88e6xxx.c
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@ -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 |