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authorGiuseppe Cavallaro <peppe.cavallaro@st.com>2008-11-28 16:24:56 -0800
committerDavid S. Miller <davem@davemloft.net>2008-11-28 16:24:56 -0800
commit0f0ca340e57bd7446855fefd07a64249acf81223 (patch)
tree9a3af0f86f8bcce9eb86a38bf4dd5f4a2c5da2d1 /drivers/net/phy/phy_device.c
parent914804b95caa61c633431262044034ab05c78ba4 (diff)
downloadlinux-linaro-android-0f0ca340e57bd7446855fefd07a64249acf81223.tar.gz
phy: power management support
This patch adds the power management support into the physical abstraction layer. Suspend and resume functions respectively turns on/off the bit 11 into the PHY Basic mode control register. Generic PHY device starts supporting PM. In order to support the wake-on LAN and avoid to put in power down the PHY device, the MDIO is aware of what the Ethernet device wants to do. Voluntary, no CONFIG_PM defines were added into the sources. Also generic suspend/resume functions are exported to allow other drivers use them (such as genphy_config_aneg etc.). Within the phy_driver_register function, we need to remove the memset. It overrides the device driver owner and it is not good. Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/phy_device.c')
-rw-r--r--drivers/net/phy/phy_device.c31
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 29546a20604..4cc75a290c0 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -779,7 +779,35 @@ static int genphy_config_init(struct phy_device *phydev)
return 0;
}
+int genphy_suspend(struct phy_device *phydev)
+{
+ int value;
+
+ mutex_lock(&phydev->lock);
+
+ value = phy_read(phydev, MII_BMCR);
+ phy_write(phydev, MII_BMCR, (value | BMCR_PDOWN));
+
+ mutex_unlock(&phydev->lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(genphy_suspend);
+int genphy_resume(struct phy_device *phydev)
+{
+ int value;
+
+ mutex_lock(&phydev->lock);
+
+ value = phy_read(phydev, MII_BMCR);
+ phy_write(phydev, MII_BMCR, (value & ~BMCR_PDOWN));
+
+ mutex_unlock(&phydev->lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(genphy_resume);
/**
* phy_probe - probe and init a PHY device
@@ -855,7 +883,6 @@ int phy_driver_register(struct phy_driver *new_driver)
{
int retval;
- memset(&new_driver->driver, 0, sizeof(new_driver->driver));
new_driver->driver.name = new_driver->name;
new_driver->driver.bus = &mdio_bus_type;
new_driver->driver.probe = phy_probe;
@@ -890,6 +917,8 @@ static struct phy_driver genphy_driver = {
.features = 0,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
.driver = {.owner= THIS_MODULE, },
};