diff options
Diffstat (limited to 'drivers/net/phy/mdio_bus.c')
| -rw-r--r-- | drivers/net/phy/mdio_bus.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 4be4cc09eb90..ba3d2523808b 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -24,6 +24,7 @@ #include <linux/of_gpio.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> +#include <linux/reset.h> #include <linux/skbuff.h> #include <linux/spinlock.h> #include <linux/mm.h> @@ -57,8 +58,23 @@ static int mdiobus_register_gpiod(struct mdio_device *mdiodev) mdiodev->reset = gpiod; - /* Assert the reset signal again */ - mdio_device_reset(mdiodev, 1); + return 0; +} + +static int mdiobus_register_reset(struct mdio_device *mdiodev) +{ + struct reset_control *reset = NULL; + + if (mdiodev->dev.of_node) + reset = devm_reset_control_get_exclusive(&mdiodev->dev, + "phy"); + if (PTR_ERR(reset) == -ENOENT || + PTR_ERR(reset) == -ENOTSUPP) + reset = NULL; + else if (IS_ERR(reset)) + return PTR_ERR(reset); + + mdiodev->reset_ctrl = reset; return 0; } @@ -74,6 +90,13 @@ int mdiobus_register_device(struct mdio_device *mdiodev) err = mdiobus_register_gpiod(mdiodev); if (err) return err; + + err = mdiobus_register_reset(mdiodev); + if (err) + return err; + + /* Assert the reset signal */ + mdio_device_reset(mdiodev, 1); } mdiodev->bus->mdio_map[mdiodev->addr] = mdiodev; |