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Date: Fri, 26 May 2017 01:03:24 +0200
From: Andrew Lunn <andrew@...n.ch>
To: David Miller <davem@...emloft.net>
Cc: Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
netdev <netdev@...r.kernel.org>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH v3 net-next 5/5] dsa: mv88e6xxx: Enable/Disable SERDES on port enable/disable
Implement the port enable/disable callbacks, which enable/disable the
SERDES interfaces, if applicable. This should save a bit of
power/heat.
We also need to enable SERDES on CPU and DSA ports, so keep the
existing call to the op, but make it conditional.
Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
drivers/net/dsa/mv88e6xxx/chip.c | 50 +++++++++++++++++++++++++++++++++-------
1 file changed, 42 insertions(+), 8 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 4e58d9a82d9e..c2f38f6770aa 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1806,10 +1806,16 @@ static int mv88e6xxx_setup_egress_floods(struct mv88e6xxx_chip *chip, int port)
static int mv88e6xxx_serdes_power(struct mv88e6xxx_chip *chip, int port,
bool on)
{
- if (chip->info->ops->serdes_power)
- return chip->info->ops->serdes_power(chip, port, on);
+ int err = 0;
- return 0;
+ if (chip->info->ops->serdes_power) {
+ err = chip->info->ops->serdes_power(chip, port, on);
+ if (err)
+ dev_err(chip->dev,
+ "Failed to change SERDES power: %d\n", err);
+ }
+
+ return err;
}
static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
@@ -1862,12 +1868,15 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
if (err)
return err;
- /* If this port is connected to a SerDes, make sure the SerDes is
- * powered up.
+ /* Enable the SERDES interface for DSA and CPU ports. Normal
+ * ports SERDES are enabled when the port is enabled, thus
+ * saving a bit of power.
*/
- err = mv88e6xxx_serdes_power(chip, port, true);
- if (err)
- return err;
+ if ((dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) {
+ err = mv88e6xxx_serdes_power(chip, port, true);
+ if (err)
+ return err;
+ }
/* Port Control 2: don't force a good FCS, set the maximum frame size to
* 10240 bytes, disable 802.1q tags checking, don't discard tagged or
@@ -1969,6 +1978,29 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
return mv88e6xxx_port_write(chip, port, PORT_DEFAULT_VLAN, 0x0000);
}
+static int mv88e6xxx_port_enable(struct dsa_switch *ds, int port,
+ struct phy_device *phydev)
+{
+ struct mv88e6xxx_chip *chip = ds->priv;
+ int err = 0;
+
+ mutex_lock(&chip->reg_lock);
+ mv88e6xxx_serdes_power(chip, port, true);
+ mutex_unlock(&chip->reg_lock);
+
+ return err;
+}
+
+static void mv88e6xxx_port_disable(struct dsa_switch *ds, int port,
+ struct phy_device *phydev)
+{
+ struct mv88e6xxx_chip *chip = ds->priv;
+
+ mutex_lock(&chip->reg_lock);
+ mv88e6xxx_serdes_power(chip, port, false);
+ mutex_unlock(&chip->reg_lock);
+}
+
static int mv88e6xxx_g1_set_switch_mac(struct mv88e6xxx_chip *chip, u8 *addr)
{
int err;
@@ -3809,6 +3841,8 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
.get_strings = mv88e6xxx_get_strings,
.get_ethtool_stats = mv88e6xxx_get_ethtool_stats,
.get_sset_count = mv88e6xxx_get_sset_count,
+ .port_enable = mv88e6xxx_port_enable,
+ .port_disable = mv88e6xxx_port_disable,
.set_eee = mv88e6xxx_set_eee,
.get_eee = mv88e6xxx_get_eee,
.get_eeprom_len = mv88e6xxx_get_eeprom_len,
--
2.11.0
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