diff options
| author | Maxime Chevallier <maxime.chevallier@bootlin.com> | 2026-07-15 12:13:54 +0200 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2026-07-17 15:43:32 +0200 |
| commit | 285fd588859f42b14f6f455faaa336b4077c3a87 (patch) | |
| tree | 09e0b5e3525b2c938c4da3e6e3546156a4003f63 /include/linux | |
| parent | ce6b4d3216b63f902bb8e9695ee6c10c83415f65 (diff) | |
net: phy: at803x: Use a helper to check for phy reset existence
The at803x family of devices are subjected to an errata that requires
hard-reseting the PHY upon link change.
That can only work if there's a physical reset line wired to the PHY,
which the driver checks by looking if there's a reset GPIO configured
for the MDIO device.
The reset may however be controlled through a reset controller, which
isn't accounted for in the errata handling.
Besides that, PHY drivers aren't expected to directly access the
mdiodev's resources directly, let's therefore wrap this with a phylib
helper, that uses a similar mdio helper to check for reset existence.
This was found in preparation for bus-level resource management for
better mdio scan support.
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Link: https://patch.msgid.link/20260715101355.88536-1-maxime.chevallier@bootlin.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mdio.h | 5 | ||||
| -rw-r--r-- | include/linux/phy.h | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/mdio.h b/include/linux/mdio.h index 300805e66592..a7d9e3ae362a 100644 --- a/include/linux/mdio.h +++ b/include/linux/mdio.h @@ -86,6 +86,11 @@ static inline void *mdiodev_get_drvdata(struct mdio_device *mdio) return dev_get_drvdata(&mdio->dev); } +static inline bool mdiodev_has_reset(struct mdio_device *mdio) +{ + return (mdio->reset_gpio || mdio->reset_ctrl); +} + void mdio_device_free(struct mdio_device *mdiodev); struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr); int mdio_device_register(struct mdio_device *mdiodev); diff --git a/include/linux/phy.h b/include/linux/phy.h index fc680901275b..beff1d6fcc7c 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -2231,6 +2231,11 @@ static inline void phy_device_reset(struct phy_device *phydev, int value) mdio_device_reset(&phydev->mdio, value); } +static inline bool phy_device_has_reset(struct phy_device *phydev) +{ + return mdiodev_has_reset(&phydev->mdio); +} + #define phydev_err(_phydev, format, args...) \ dev_err(&_phydev->mdio.dev, format, ##args) |