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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-12-30 08:23:30 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-30 22:03:42 -0800
commit2f5cb43406d0b29b96248f5328a14a6f6abf8ae6 (patch)
treef43e017599e590a9fbff22e2973dd77e2bc4fb41 /drivers/net/phy/mdio_bus.c
parent541cd3ee00a4fe975b22fac6a3bc846bacef37f7 (diff)
downloadlinux-linaro-stable-2f5cb43406d0b29b96248f5328a14a6f6abf8ae6.tar.gz
phylib: Properly reinitialize PHYs after hibernation
Since hibernation assumes power loss, we should fully reinitialize PHYs (including platform fixups), as if PHYs were just attached. This patch factors phy_init_hw() out of phy_attach_direct(), then converts mdio_bus to dev_pm_ops and adds an appropriate restore() callback. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/mdio_bus.c')
-rw-r--r--drivers/net/phy/mdio_bus.c50
1 files changed, 43 insertions, 7 deletions
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 49252d390903..e17b70291bbc 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -264,6 +264,8 @@ static int mdio_bus_match(struct device *dev, struct device_driver *drv)
(phydev->phy_id & phydrv->phy_id_mask));
}
+#ifdef CONFIG_PM
+
static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
{
struct device_driver *drv = phydev->dev.driver;
@@ -295,10 +297,7 @@ static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
return true;
}
-/* Suspend and resume. Copied from platform_suspend and
- * platform_resume
- */
-static int mdio_bus_suspend(struct device * dev, pm_message_t state)
+static int mdio_bus_suspend(struct device *dev)
{
struct phy_driver *phydrv = to_phy_driver(dev->driver);
struct phy_device *phydev = to_phy_device(dev);
@@ -318,7 +317,7 @@ static int mdio_bus_suspend(struct device * dev, pm_message_t state)
return phydrv->suspend(phydev);
}
-static int mdio_bus_resume(struct device * dev)
+static int mdio_bus_resume(struct device *dev)
{
struct phy_driver *phydrv = to_phy_driver(dev->driver);
struct phy_device *phydev = to_phy_device(dev);
@@ -338,11 +337,48 @@ no_resume:
return 0;
}
+static int mdio_bus_restore(struct device *dev)
+{
+ struct phy_device *phydev = to_phy_device(dev);
+ struct net_device *netdev = phydev->attached_dev;
+ int ret;
+
+ if (!netdev)
+ return 0;
+
+ ret = phy_init_hw(phydev);
+ if (ret < 0)
+ return ret;
+
+ /* The PHY needs to renegotiate. */
+ phydev->link = 0;
+ phydev->state = PHY_UP;
+
+ phy_start_machine(phydev, NULL);
+
+ return 0;
+}
+
+static struct dev_pm_ops mdio_bus_pm_ops = {
+ .suspend = mdio_bus_suspend,
+ .resume = mdio_bus_resume,
+ .freeze = mdio_bus_suspend,
+ .thaw = mdio_bus_resume,
+ .restore = mdio_bus_restore,
+};
+
+#define MDIO_BUS_PM_OPS (&mdio_bus_pm_ops)
+
+#else
+
+#define MDIO_BUS_PM_OPS NULL
+
+#endif /* CONFIG_PM */
+
struct bus_type mdio_bus_type = {
.name = "mdio_bus",
.match = mdio_bus_match,
- .suspend = mdio_bus_suspend,
- .resume = mdio_bus_resume,
+ .pm = MDIO_BUS_PM_OPS,
};
EXPORT_SYMBOL(mdio_bus_type);