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| author | Dejin Zheng <zhengdejin5@gmail.com> | 2020-03-23 23:05:57 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-23 22:00:02 -0700 |
| commit | fcbd30d09ba05389cb40cc1769b565df62aead35 (patch) | |
| tree | fc3550eb0a2c1a4fc5430ae854aeb1add4db8080 /include/linux/phy.h | |
| parent | 8964a2174f91a87b0858e8fb3018eaf06eaa0ede (diff) | |
| download | lwn-fcbd30d09ba05389cb40cc1769b565df62aead35.tar.gz lwn-fcbd30d09ba05389cb40cc1769b565df62aead35.zip | |
net: phy: introduce phy_read_poll_timeout macro
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>
Diffstat (limited to 'include/linux/phy.h')
| -rw-r--r-- | include/linux/phy.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/phy.h b/include/linux/phy.h index 3984f375126e..2432ca463ddc 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -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 |