[PATCH net 3/4] net:phy: add phy_device_reset_status() support
DORMANTno replies
From: Badel, Laurent <hidden>
Date: 2020-10-28 01:38:41
Also in:
linux-devicetree
Subsystem:
ethernet phy library, networking drivers, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Subject: [PATCH net 3/4] net:phy: add phy_device_reset_status() support Description: add support to query the status of the reset line of an MDIO device. Signed-off-by: Laurent Badel <redacted> --- drivers/net/phy/mdio_device.c | 18 ++++++++++++++++++ include/linux/mdio.h | 1 + include/linux/phy.h | 5 +++++ 3 files changed, 24 insertions(+)
diff --git a/drivers/net/phy/mdio_device.c b/drivers/net/phy/mdio_device.c
index 0837319a52d7..4909feb57027 100644
--- a/drivers/net/phy/mdio_device.c
+++ b/drivers/net/phy/mdio_device.c@@ -136,6 +136,24 @@ void mdio_device_reset(struct mdio_device *mdiodev, int value) } EXPORT_SYMBOL(mdio_device_reset); +/** + * mdio_device_reset_status - returns the reset status of an MDIO device + * + * Returns >0 if the reset line is asserted, 0 if it is not asserted + and <0 on error. + */ +int mdio_device_reset_status(struct mdio_device *mdiodev) +{ + if (mdiodev->reset_gpio) + return gpiod_get_value_cansleep(mdiodev->reset_gpio); + + if (mdiodev->reset_ctrl) + return reset_control_status(mdiodev->reset_ctrl); + + return -EOPNOTSUPP; +} +EXPORT_SYMBOL(mdio_device_reset_status); + /** * mdio_probe - probe an MDIO device * @dev: device to probe
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index dbd69b3d170b..179c5bdd90e8 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h@@ -92,6 +92,7 @@ struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr); int mdio_device_register(struct mdio_device *mdiodev); void mdio_device_remove(struct mdio_device *mdiodev); void mdio_device_reset(struct mdio_device *mdiodev, int value); +int mdio_device_reset_status(struct mdio_device *mdiodev); int mdio_driver_register(struct mdio_driver *drv); void mdio_driver_unregister(struct mdio_driver *drv); int mdio_device_bus_match(struct device *dev, struct device_driver *drv);
diff --git a/include/linux/phy.h b/include/linux/phy.h
index eb3cb1a98b45..e12b90db9852 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h@@ -1461,6 +1461,11 @@ static inline void phy_device_reset(struct phy_device *phydev, int value) mdio_device_reset(&phydev->mdio, value); } +static inline int phy_device_reset_status(struct phy_device *phydev) +{ + return mdio_device_reset_status(&phydev->mdio); +} + #define phydev_err(_phydev, format, args...) \ dev_err(&_phydev->mdio.dev, format, ##args)
--
2.17.1
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