net: dsa: mv88e6xxx: Fix stats counters for 6352 family (f3a8b6b6) · Commits · e / devices / android_kernel_xiaomi_nabu

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>

drivers/net/dsa/mv88e6xxx.c

+16 −0

Original line number	Diff line number	Diff line
		@@ -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 \|