diff options
| -rw-r--r-- | drivers/of/of_mdio.c | 64 |
1 files changed, 58 insertions, 6 deletions
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c index e3a8b22ef9dd..23049aeca662 100644 --- a/drivers/of/of_mdio.c +++ b/drivers/of/of_mdio.c @@ -34,7 +34,10 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) { struct phy_device *phy; struct device_node *child; - int rc, i; + const __be32 *paddr; + u32 addr; + bool is_c45, scanphys = false; + int rc, i, len; /* Mask out all PHYs from auto probing. Instead the PHYs listed in * the device tree are populated after the bus has been registered */ @@ -54,14 +57,10 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) /* Loop over the child nodes and register a phy_device for each one */ for_each_available_child_of_node(np, child) { - const __be32 *paddr; - u32 addr; - int len; - bool is_c45; - /* A PHY must have a reg property in the range [0-31] */ paddr = of_get_property(child, "reg", &len); if (!paddr || len < sizeof(*paddr)) { + scanphys = true; dev_err(&mdio->dev, "%s has invalid PHY address\n", child->full_name); continue; @@ -111,6 +110,59 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np) child->name, addr); } + if (!scanphys) + return 0; + + /* auto scan for PHYs with empty reg property */ + for_each_available_child_of_node(np, child) { + /* Skip PHYs with reg property set */ + paddr = of_get_property(child, "reg", &len); + if (paddr) + continue; + + is_c45 = of_device_is_compatible(child, + "ethernet-phy-ieee802.3-c45"); + + for (addr = 0; addr < PHY_MAX_ADDR; addr++) { + /* skip already registered PHYs */ + if (mdio->phy_map[addr]) + continue; + + /* be noisy to encourage people to set reg property */ + dev_info(&mdio->dev, "scan phy %s at address %i\n", + child->name, addr); + + phy = get_phy_device(mdio, addr, is_c45); + if (!phy || IS_ERR(phy)) + continue; + + if (mdio->irq) { + mdio->irq[addr] = + irq_of_parse_and_map(child, 0); + if (!mdio->irq[addr]) + mdio->irq[addr] = PHY_POLL; + } + + /* Associate the OF node with the device structure so it + * can be looked up later */ + of_node_get(child); + phy->dev.of_node = child; + + /* All data is now stored in the phy struct; + * register it */ + rc = phy_device_register(phy); + if (rc) { + phy_device_free(phy); + of_node_put(child); + continue; + } + + dev_info(&mdio->dev, "registered phy %s at address %i\n", + child->name, addr); + break; + } + } + return 0; } EXPORT_SYMBOL(of_mdiobus_register); |