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.hesselba...@gmail.com>
---
Changelog:
RFCv1->RFCv2:
- only check for phydev->attached_dev and let phy_suspend decide on
performing suspend or not (Suggested by Florian)
@Florian: You suggested to 'make sure that the MDIO bus suspend policy
was set to "auto"'. I wasn't able to find any clue how to check that,
so I ignored that for now.
Cc: David Miller <da...@davemloft.net>
Cc: Florian Fainelli <f.faine...@gmail.com>
Cc: Mugunthan V N <mugunthan...@ti.com>
Cc: net...@vger.kernel.org
Cc: linux-arm-ker...@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
drivers/net/phy/mdio_bus.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 5617876..f533d17 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -320,6 +320,31 @@ 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;
+ 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);
+ if (!phydev->attached_dev)
+ 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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