From: Antoine Tenart Date: Tue, 23 Jun 2020 14:30:07 +0000 (+0200) Subject: net: phy: add support for a common probe between shared PHYs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0ef44e5cab8dbf0a0327871b48fe7c8425d0d885;p=linux.git net: phy: add support for a common probe between shared PHYs Shared PHYs (PHYs in the same hardware package) may have shared registers and their drivers would usually need to share information. There is currently a way to have a shared (part of the) init, by using phy_package_init_once(). This patch extends the logic to share parts of the probe to allow sharing the initialization of locks or resources retrieval. Signed-off-by: Antoine Tenart Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- diff --git a/include/linux/phy.h b/include/linux/phy.h index 7860d56c6bf5b..6fb8f302978de 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -244,7 +244,8 @@ struct phy_package_shared { }; /* used as bit number in atomic bitops */ -#define PHY_SHARED_F_INIT_DONE 0 +#define PHY_SHARED_F_INIT_DONE 0 +#define PHY_SHARED_F_PROBE_DONE 1 /* * The Bus class for PHYs. Devices which provide access to @@ -1566,14 +1567,25 @@ static inline int __phy_package_write(struct phy_device *phydev, return __mdiobus_write(phydev->mdio.bus, shared->addr, regnum, val); } -static inline bool phy_package_init_once(struct phy_device *phydev) +static inline bool __phy_package_set_once(struct phy_device *phydev, + unsigned int b) { struct phy_package_shared *shared = phydev->shared; if (!shared) return false; - return !test_and_set_bit(PHY_SHARED_F_INIT_DONE, &shared->flags); + return !test_and_set_bit(b, &shared->flags); +} + +static inline bool phy_package_init_once(struct phy_device *phydev) +{ + return __phy_package_set_once(phydev, PHY_SHARED_F_INIT_DONE); +} + +static inline bool phy_package_probe_once(struct phy_device *phydev) +{ + return __phy_package_set_once(phydev, PHY_SHARED_F_PROBE_DONE); } extern struct bus_type mdio_bus_type;