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net: phy: allow a PHY driver to define neither features nor get_features

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Meanwhile we have generic functions for reading the abilities of
Clause 22 / 45 PHY's. This allows to use them as fallback in case
callback get_features isn't set. Benefit is the reduction of
boilerplate code in PHY drivers.

v2:
- adjust the comment in phy_driver_register to match the code

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2019-04-03 23:14:33 +02:00 committed by David S. Miller
parent e177163d36
commit a1deab17b2
1 changed files with 12 additions and 7 deletions
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19
drivers/net/phy/phy_device.c
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@ -2143,12 +2143,17 @@ static int phy_probe(struct device *dev)
*/
if (phydrv->features) {
linkmode_copy(phydev->supported, phydrv->features);
} else {
} else if (phydrv->get_features) {
err = phydrv->get_features(phydev);
if (err)
goto out;
} else if (phydev->is_c45) {
err = genphy_c45_pma_read_abilities(phydev);
} else {
err = genphy_read_abilities(phydev);
}
if (err)
goto out;
of_set_phy_supported(phydev);
linkmode_copy(phydev->advertising, phydev->supported);
@ -2216,11 +2221,11 @@ int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
int retval;
/* Either the features are hard coded, or dynamically
* determine. It cannot be both or neither
* determined. It cannot be both.
*/
if (WARN_ON((!new_driver->features && !new_driver->get_features) ||
(new_driver->features && new_driver->get_features))) {
pr_err("%s: Driver features are missing\n", new_driver->name);
if (WARN_ON(new_driver->features && new_driver->get_features)) {
pr_err("%s: features and get_features must not both be set\n",
new_driver->name);
return -EINVAL;
}