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authorJisheng Zhang2020-07-27 19:05:20 +0800
committerDavid S. Miller2020-07-28 17:48:20 -0700
commit77b2898394e3bb843228ee6f90066a23cf67e8a1 (patch)
tree4f87b2fa3a9e7c7abc9a8fa8e13c05999206f6d5 /drivers/net/ethernet/stmicro
parent1d8e5b0f3f2c6d05697f8192aac7255e6be1e715 (diff)
net: stmmac: Speed down the PHY if WoL to save energy
When WoL is enabled and the machine is powered off, the PHY remains waiting for wakeup events at max speed, which is a waste of energy. Slow down the PHY speed before stopping the ethernet if WoL is enabled, Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/stmmac_main.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 32c0c9647b87..89b2b3472852 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2823,6 +2823,8 @@ static int stmmac_open(struct net_device *dev)
stmmac_init_coalesce(priv);
phylink_start(priv->phylink);
+ /* We may have called phylink_speed_down before */
+ phylink_speed_up(priv->phylink);
/* Request the IRQ lines */
ret = request_irq(dev->irq, stmmac_interrupt,
@@ -2896,6 +2898,8 @@ static int stmmac_release(struct net_device *dev)
if (priv->eee_enabled)
del_timer_sync(&priv->eee_ctrl_timer);
+ if (device_may_wakeup(priv->device))
+ phylink_speed_down(priv->phylink, false);
/* Stop and disconnect the PHY */
phylink_stop(priv->phylink);
phylink_disconnect_phy(priv->phylink);
@@ -5095,6 +5099,8 @@ int stmmac_suspend(struct device *dev)
} else {
mutex_unlock(&priv->lock);
rtnl_lock();
+ if (device_may_wakeup(priv->device))
+ phylink_speed_down(priv->phylink, false);
phylink_stop(priv->phylink);
rtnl_unlock();
mutex_lock(&priv->lock);
@@ -5207,6 +5213,8 @@ int stmmac_resume(struct device *dev)
if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
rtnl_lock();
phylink_start(priv->phylink);
+ /* We may have called phylink_speed_down before */
+ phylink_speed_up(priv->phylink);
rtnl_unlock();
}