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net: phy: Support finding a phy in the devicetree 

When the ethernet device has a device_node then try finding
the associated phy via the phy-handle property.

This makes the phy handling via devicetree transparent to the
ethernet drivers.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-05-21 11:53:28 +02:00
parent 9b259eb3fd
commit 9cbfe615f9
1 changed files with 30 additions and 0 deletions
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30
drivers/net/phy/phy.c
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@ -262,6 +262,29 @@ int phy_register_device(struct phy_device* dev)
return ret;
}
static struct phy_device *of_mdio_find_phy(struct eth_device *edev)
{
struct device_d *dev;
struct device_node *phy_node;
if (!IS_ENABLED(CONFIG_OFDEVICE))
return NULL;
if (!edev->parent->device_node)
return NULL;
phy_node = of_parse_phandle(edev->parent->device_node, "phy-handle", 0);
if (!phy_node)
return NULL;
bus_for_each_device(&mdio_bus_type, dev) {
if (dev->device_node == phy_node)
return container_of(dev, struct phy_device, dev);
}
return NULL;
}
static int phy_device_attach(struct phy_device *phy, struct eth_device *edev,
void (*adjust_link) (struct eth_device *edev),
u32 flags, phy_interface_t interface)
@ -312,6 +335,13 @@ int phy_device_connect(struct eth_device *edev, struct mii_bus *bus, int addr,
return 0;
}
phy = of_mdio_find_phy(edev);
if (phy) {
ret = phy_device_attach(phy, edev, adjust_link, flags, interface);
goto out;
}
if (addr >= 0) {
phy = mdiobus_scan(bus, addr);
if (IS_ERR(phy)) {