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path: root/drivers/of/of_mdio.c
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Diffstat (limited to 'drivers/of/of_mdio.c')
-rw-r--r--drivers/of/of_mdio.c64
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);