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netdev/phy/of: Handle IEEE802.3 clause 45 Ethernet PHYs in of_mdiobus_register()

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Define two new "compatible" values for Ethernet
PHYs. "ethernet-phy-ieee802.3-c22" and "ethernet-phy-ieee802.3-c45"
are used to indicate a PHY uses the corresponding protocol.

If a PHY is "compatible" with "ethernet-phy-ieee802.3-c45", we
indicate this so that get_phy_device() can properly probe the device.

If get_phy_device() fails, it was probably due to failing the probe of
the PHY identifier registers.  Since we have the device tree telling
us the PHY exists, go ahead and add it anyhow with a phy_id of zero.
There may be a driver match based on the "compatible" property.

Signed-off-by: David Daney <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
David Daney 2012-06-27 07:33:36 +00:00 • committed by David S. Miller
commit 6bd47ac2e4
2 changed files with 23 additions and 5 deletions
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16
drivers/of/of_mdio.c
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@ -57,6 +57,7 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
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);
@ -79,11 +80,18 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
mdio->irq[addr] = PHY_POLL;
}
phy = get_phy_device(mdio, addr, false);
is_c45 = of_device_is_compatible(child,
"ethernet-phy-ieee802.3-c45");
phy = get_phy_device(mdio, addr, is_c45);
if (!phy || IS_ERR(phy)) {
dev_err(&mdio->dev, "error probing PHY at address %i\n",
addr);
continue;
phy = phy_device_create(mdio, addr, 0, false, NULL);
if (!phy || IS_ERR(phy)) {
dev_err(&mdio->dev,
"error creating PHY at address %i\n",
addr);
continue;
}
}
/* Associate the OF node with the device structure so it