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net: bcmgenet: Add support for PHY-based Wake-on-LAN

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If available, interrogate the PHY to find out whether we can use it for
Wake-on-LAN. This can be a more power efficient way of implementing
that feature, especially when the MAC is powered off in low power
states.

Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2023-05-11 10:21:10 -07:00 • committed by David S. Miller
parent 8baddaa9d4
commit 7e400ff35c
1 changed files with 14 additions and 0 deletions
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14
drivers/net/ethernet/broadcom/genet/bcmgenet_wol.c
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@ -42,6 +42,12 @@ void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
struct bcmgenet_priv *priv = netdev_priv(dev); struct bcmgenet_priv *priv = netdev_priv(dev);
struct device *kdev = &priv->pdev->dev; struct device *kdev = &priv->pdev->dev;
if (dev->phydev) {
phy_ethtool_get_wol(dev->phydev, wol);
if (wol->supported)
return;
}
if (!device_can_wakeup(kdev)) { if (!device_can_wakeup(kdev)) {
wol->supported = 0; wol->supported = 0;
wol->wolopts = 0; wol->wolopts = 0;
@ -63,6 +69,14 @@ int bcmgenet_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{ {
struct bcmgenet_priv *priv = netdev_priv(dev); struct bcmgenet_priv *priv = netdev_priv(dev);
struct device *kdev = &priv->pdev->dev; struct device *kdev = &priv->pdev->dev;
int ret;
/* Try Wake-on-LAN from the PHY first */
if (dev->phydev) {
ret = phy_ethtool_set_wol(dev->phydev, wol);
if (ret != -EOPNOTSUPP)
return ret;
}
if (!device_can_wakeup(kdev)) if (!device_can_wakeup(kdev))
return -ENOTSUPP; return -ENOTSUPP;