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| author | Dejin Zheng <zhengdejin5@gmail.com> | 2020-03-23 23:05:53 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-23 22:00:02 -0700 |
| commit | bd971ff0b73927b91f4520621d49d3a801ee4837 (patch) | |
| tree | 87c54b5d994d482ea2ade2a9a9f2a4c5801f309e /include/linux/phy.h | |
| parent | eaa6b01024a74ab5f3064f17dd88596284f497c4 (diff) | |
| download | lwn-bd971ff0b73927b91f4520621d49d3a801ee4837.tar.gz lwn-bd971ff0b73927b91f4520621d49d3a801ee4837.zip | |
net: phy: introduce phy_read_mmd_poll_timeout macro
it is sometimes necessary to poll a phy register by phy_read_mmd()
function until its value satisfies some condition. introduce
phy_read_mmd_poll_timeout() macros that do this.
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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 | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/phy.h b/include/linux/phy.h index 99b5e3c4b621..3984f375126e 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -24,6 +24,7 @@ #include <linux/mod_devicetable.h> #include <linux/u64_stats_sync.h> #include <linux/irqreturn.h> +#include <linux/iopoll.h> #include <linux/atomic.h> @@ -787,6 +788,19 @@ static inline int __phy_modify_changed(struct phy_device *phydev, u32 regnum, */ int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum); +#define phy_read_mmd_poll_timeout(phydev, devaddr, regnum, val, cond, \ + sleep_us, timeout_us, sleep_before_read) \ +({ \ + int __ret = read_poll_timeout(phy_read_mmd, val, (cond) || val < 0, \ + sleep_us, timeout_us, sleep_before_read, \ + phydev, devaddr, regnum); \ + if (val < 0) \ + __ret = val; \ + if (__ret) \ + phydev_err(phydev, "%s failed: %d\n", __func__, __ret); \ + __ret; \ +}) + /** * __phy_read_mmd - Convenience function for reading a register * from an MMD on a given PHY. |