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net: dsa: mv88e6xxx: Power on/off SERDES on cmode change 

The 6390 family has a number of SERDES interfaces per port. When the
cmode changes, eg 1000Base-X to XAUI, the SERDES interface in use will
also change. Power down the old SERDES interface and power up the new
SERDES interface.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2018-08-09 15:38:46 +02:00 committed by David S. Miller
parent 2d2e1dd299
commit 364e9d7776
1 changed files with 9 additions and 0 deletions
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9
drivers/net/dsa/mv88e6xxx/port.c
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@ -19,6 +19,7 @@
#include "chip.h"
#include "port.h"
#include "serdes.h"
int mv88e6xxx_port_read(struct mv88e6xxx_chip *chip, int port, int reg,
u16 *val)
@ -372,6 +373,10 @@ int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
cmode = 0;
}
err = mv88e6390_serdes_power(chip, port, false);
if (err)
return err;
if (cmode) {
err = mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_STS, &reg);
if (err)
@ -383,6 +388,10 @@ int mv88e6390x_port_set_cmode(struct mv88e6xxx_chip *chip, int port,
err = mv88e6xxx_port_write(chip, port, MV88E6XXX_PORT_STS, reg);
if (err)
return err;
err = mv88e6390_serdes_power(chip, port, true);
if (err)
return err;
}
chip->ports[port].cmode = cmode;