Messages in this thread | | | Subject | Re: [PATCH net-next v6 03/10] net: phy: introduce phy_read_mmd_poll_timeout macro | From | Florian Fainelli <> | Date | Sun, 22 Mar 2020 20:21:24 -0700 |
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On 3/22/2020 7:56 PM, Dejin Zheng wrote: > 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> > Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com> > --- > v5 -> v6: > - no changed > v4 -> v5: > - no changed > v3 -> v4: > - deal with precedence issues for parameter cond. > v2 -> v3: > - modify the parameter order of newly added functions. > phy_read_mmd_poll_timeout(val, cond, sleep_us, timeout_us, \ > phydev, devaddr, regnum) > || > \/ > phy_read_mmd_poll_timeout(phydev, devaddr regnum, val, cond, \ > sleep_us, timeout_us) > v1 -> v2: > - passed a phydev, device address and a reg to replace args... > parameter in phy_read_mmd_poll_timeout() by Andrew Lunn 's > suggestion. Andrew Lunn <andrew@lunn.ch>, Thanks very much for > your help! > - handle phy_read_mmd return an error(the return value < 0) in > phy_read_mmd_poll_timeout(). Thanks Andrew again. > > > include/linux/phy.h | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/include/linux/phy.h b/include/linux/phy.h > index 36d9dea04016..42a5ec9288d5 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> > > @@ -784,6 +785,20 @@ 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) \ > +({ \ > + int ret = 0; \ > + ret = read_poll_timeout(phy_read_mmd, val, (cond) || val < 0, \ > + sleep_us, timeout_us, phydev, devaddr, \ > + regnum); \ > + if (val < 0) \ > + ret = val; \ > + if (ret) \ > + phydev_err(phydev, "%s failed: %d\n", __func__, ret); \
Likewise, you may consider declaring ret as __ret to avoid any possible shadowing/re-declaration. With that:
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> -- Florian
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