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Merge branch 'mv88e6xxx-Disable-ports-to-save-power'

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Andrew Lunn says:

====================
mv88e6xxx: Disable ports to save power

Save some power by disabling ports. The first patch fully disables a
port when it is runtime disabled. The second disables any ports which
are not used at all.

Depending on configuration strapping, this can lower the temperature
of an idle switch a few degrees.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2019-05-03 23:53:06 -04:00
commit 3b3600fffb
1 changed files with 14 additions and 1 deletions
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15
drivers/net/dsa/mv88e6xxx/chip.c
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@ -2428,6 +2428,9 @@ static void mv88e6xxx_port_disable(struct dsa_switch *ds, int port)
mutex_lock(&chip->reg_lock);
if (mv88e6xxx_port_set_state(chip, port, BR_STATE_DISABLED))
dev_err(chip->dev, "failed to disable port\n");
if (chip->info->ops->serdes_irq_free)
chip->info->ops->serdes_irq_free(chip, port);
@ -2596,8 +2599,18 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
/* Setup Switch Port Registers */
for (i = 0; i < mv88e6xxx_num_ports(chip); i++) {
if (dsa_is_unused_port(ds, i))
if (dsa_is_unused_port(ds, i)) {
err = mv88e6xxx_port_set_state(chip, i,
BR_STATE_DISABLED);
if (err)
goto unlock;
err = mv88e6xxx_serdes_power(chip, i, false);
if (err)
goto unlock;
continue;
}
err = mv88e6xxx_setup_port(chip, i);
if (err)