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>
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@ -262,6 +262,29 @@ int phy_register_device(struct phy_device* dev)
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return ret;
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}
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static struct phy_device *of_mdio_find_phy(struct eth_device *edev)
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{
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struct device_d *dev;
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struct device_node *phy_node;
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if (!IS_ENABLED(CONFIG_OFDEVICE))
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return NULL;
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if (!edev->parent->device_node)
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return NULL;
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phy_node = of_parse_phandle(edev->parent->device_node, "phy-handle", 0);
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if (!phy_node)
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return NULL;
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bus_for_each_device(&mdio_bus_type, dev) {
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if (dev->device_node == phy_node)
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return container_of(dev, struct phy_device, dev);
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}
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return NULL;
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}
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static int phy_device_attach(struct phy_device *phy, struct eth_device *edev,
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void (*adjust_link) (struct eth_device *edev),
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u32 flags, phy_interface_t interface)
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@ -312,6 +335,13 @@ int phy_device_connect(struct eth_device *edev, struct mii_bus *bus, int addr,
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return 0;
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}
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phy = of_mdio_find_phy(edev);
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if (phy) {
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ret = phy_device_attach(phy, edev, adjust_link, flags, interface);
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goto out;
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}
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if (addr >= 0) {
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phy = mdiobus_scan(bus, addr);
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if (IS_ERR(phy)) {
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