diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/phy/phy_device.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index fc569eae7215..eb3b946bd8c0 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -33,6 +33,7 @@ #include <linux/mdio.h> #include <linux/io.h> #include <linux/uaccess.h> +#include <linux/of.h> #include <asm/irq.h> @@ -1166,6 +1167,38 @@ static int gen10g_resume(struct phy_device *phydev) return 0; } +static void of_set_phy_supported(struct phy_device *phydev) +{ + struct device_node *node = phydev->dev.of_node; + u32 max_speed; + + if (!IS_ENABLED(CONFIG_OF_MDIO)) + return; + + if (!node) + return; + + if (!of_property_read_u32(node, "max-speed", &max_speed)) { + /* The default values for phydev->supported are provided by the PHY + * driver "features" member, we want to reset to sane defaults fist + * before supporting higher speeds. + */ + 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; + } + } +} + /** * phy_probe - probe and init a PHY device * @dev: device to probe and init @@ -1200,7 +1233,8 @@ static int phy_probe(struct device *dev) * or both of these values */ phydev->supported = phydrv->features; - phydev->advertising = phydrv->features; + of_set_phy_supported(phydev); + phydev->advertising = phydev->supported; /* Set the state to READY by default */ phydev->state = PHY_READY; |