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net: phy: Add phy_modify() accessor

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Add read-modify-write unlocked accessor for accessing a PHY register.

Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@collabora.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Ariel D'Alessandro 2022-04-12 10:31:36 -03:00 • committed by Stefano Babic
parent d7db0e6df3
commit 087baf80ec
2 changed files with 22 additions and 0 deletions
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20
drivers/net/phy/phy.c
View file

@ -1110,3 +1110,23 @@ int phy_get_interface_by_name(const char *str)
return -1;
}
/**
* phy_modify - Convenience function for modifying a given PHY register
* @phydev: the phy_device struct
* @devad: The MMD to read from
* @regnum: register number to write
* @mask: bit mask of bits to clear
* @set: new value of bits set in mask to write to @regnum
*/
int phy_modify(struct phy_device *phydev, int devad, int regnum, u16 mask,
u16 set)
{
int ret;
ret = phy_read(phydev, devad, regnum);
if (ret < 0)
return ret;
return phy_write(phydev, devad, regnum, (ret & ~mask) | set);
}

2
include/phy.h
View file

@ -526,6 +526,8 @@ int phy_config(struct phy_device *phydev);
int phy_shutdown(struct phy_device *phydev);
int phy_register(struct phy_driver *drv);
int phy_set_supported(struct phy_device *phydev, u32 max_speed);
int phy_modify(struct phy_device *phydev, int devad, int regnum, u16 mask,
u16 set);
int genphy_config_aneg(struct phy_device *phydev);
int genphy_restart_aneg(struct phy_device *phydev);
int genphy_update_link(struct phy_device *phydev);