[PATCH RFC v1 4/7] net: phy: suspend unused PHYs on mdio_bus in late_initcall
Sebastian Hesselbarth
sebastian.hesselbarth at gmail.com
Wed Nov 20 15:21:50 EST 2013
Since phy_attach ensures PHYs are resumed, we can now suspend all
PHYs that have no attached netdev after initcalls.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth at gmail.com>
---
Cc: David S. Miller <davem at davemloft.net>
Cc: netdev at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
---
drivers/net/phy/mdio_bus.c | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 5617876..10eba58 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -320,6 +320,33 @@ static int mdio_bus_match(struct device *dev, struct device_driver *drv)
(phydev->phy_id & phydrv->phy_id_mask));
}
+static int mdio_bus_suspend_unused(struct device *busdev, void *data)
+{
+ struct mii_bus *bus = to_mii_bus(busdev);
+ struct phy_device *phydev;
+ struct phy_driver *phydrv;
+ int i;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ if (!bus->phy_map[i])
+ continue;
+
+ phydev = to_phy_device(&bus->phy_map[i]->dev);
+ phydrv = to_phy_driver(phydev->dev.driver);
+ if (!phydev->attached_dev && phydrv && phydrv->suspend)
+ phy_suspend(phydev);
+ }
+
+ return 0;
+}
+
+static int mdio_bus_class_suspend_unused(void)
+{
+ return class_for_each_device(&mdio_bus_class, NULL, NULL,
+ mdio_bus_suspend_unused);
+}
+late_initcall_sync(mdio_bus_class_suspend_unused);
+
#ifdef CONFIG_PM
static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
--
1.7.2.5
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