diff options
| -rw-r--r-- | drivers/net/phy/phy_device.c | 24 | ||||
| -rw-r--r-- | include/linux/phy.h | 2 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 1de5e242b8b4..462c17ed87b8 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1218,6 +1218,30 @@ out: } EXPORT_SYMBOL(phy_loopback); +/** + * phy_reset_after_clk_enable - perform a PHY reset if needed + * @phydev: target phy_device struct + * + * Description: Some PHYs are known to need a reset after their refclk was + * enabled. This function evaluates the flags and perform the reset if it's + * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy + * was reset. + */ +int phy_reset_after_clk_enable(struct phy_device *phydev) +{ + if (!phydev || !phydev->drv) + return -ENODEV; + + if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) { + phy_device_reset(phydev, 1); + phy_device_reset(phydev, 0); + return 1; + } + + return 0; +} +EXPORT_SYMBOL(phy_reset_after_clk_enable); + /* Generic PHY support and helper functions */ /** diff --git a/include/linux/phy.h b/include/linux/phy.h index d3037e2ffbc4..c4b4715caa21 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -59,6 +59,7 @@ #define PHY_HAS_INTERRUPT 0x00000001 #define PHY_IS_INTERNAL 0x00000002 +#define PHY_RST_AFTER_CLK_EN 0x00000004 #define MDIO_DEVICE_IS_PHY 0x80000000 /* Interface Mode definitions */ @@ -853,6 +854,7 @@ int phy_aneg_done(struct phy_device *phydev); int phy_stop_interrupts(struct phy_device *phydev); int phy_restart_aneg(struct phy_device *phydev); +int phy_reset_after_clk_enable(struct phy_device *phydev); static inline void phy_device_reset(struct phy_device *phydev, int value) { |