net: phy: introduce phy_read_poll_timeout macro (fcbd30d0) · Commits · 戴 / test

it is sometimes necessary to poll a phy register by phy_read() function until its value satisfies some condition. introduce phy_read_poll_timeout() macros that do this. Suggested-by:

Andrew Lunn <andrew@lunn.ch> Reviewed-by:

Andrew Lunn <andrew@lunn.ch> Signed-off-by:

Dejin Zheng <zhengdejin5@gmail.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/linux/phy.h

+13 −0

Original line number	Diff line number	Diff line
		@@ -717,6 +717,19 @@ static inline int phy_read(struct phy_device *phydev, u32 regnum)
		return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, regnum);
		}

		#define phy_read_poll_timeout(phydev, regnum, val, cond, sleep_us, \
		timeout_us, sleep_before_read) \
		({ \
		int __ret = read_poll_timeout(phy_read, val, (cond) \|\| val < 0, \
		sleep_us, timeout_us, sleep_before_read, phydev, regnum); \
		if (val < 0) \
		__ret = val; \
		if (__ret) \
		phydev_err(phydev, "%s failed: %d\n", __func__, __ret); \
		__ret; \
		})


		/**
		* __phy_read - convenience function for reading a given PHY register
		* @phydev: the phy_device struct

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