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net: of_mdio: parse "max-speed" property to set PHY supported features

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The "max-speed" property is defined per the ePAPR specification to
express the maximum speed a PHY supports. Use that property, if present
to set the phydev->supported features which properly restricts the PHY
within the range of defined speeds.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2013-12-05 14:52:14 -08:00 committed by David S. Miller
parent e9fbdf176d
commit 8fdade4be7
1 changed files with 24 additions and 1 deletions
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25
drivers/of/of_mdio.c
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@ -22,12 +22,30 @@
MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
MODULE_LICENSE("GPL");
static void of_set_phy_supported(struct phy_device *phydev, u32 max_speed)
{
phydev->supported |= PHY_DEFAULT_FEATURES;
switch (max_speed) {
default:
return;
case SPEED_1000:
phydev->supported |= PHY_1000BT_FEATURES;
case SPEED_100:
phydev->supported |= PHY_100BT_FEATURES;
case SPEED_10:
phydev->supported |= PHY_10BT_FEATURES;
}
}
static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *child,
u32 addr)
{
struct phy_device *phy;
bool is_c45;
int rc, prev_irq;
u32 max_speed = 0;
is_c45 = of_device_is_compatible(child,
"ethernet-phy-ieee802.3-c45");
@ -58,8 +76,13 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *chi
return 1;
}
/* Set phydev->supported based on the "max-speed" property
* if present */
if (!of_property_read_u32(child, "max-speed", &max_speed))
of_set_phy_supported(phy, max_speed);
dev_dbg(&mdio->dev, "registered phy %s at address %i\n",
child->name, addr);
child->name, addr);
return 0;
}