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.
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| @@ -717,6 +717,19 @@ static inline int phy_read(struct phy_device *phydev, u32 regnum) · 716 unmodified lines | ||
| 717 | 717 | return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, regnum); |
| 718 | 718 | } |
| 719 | 719 | |
| 720 | +#define phy_read_poll_timeout(phydev, regnum, val, cond, sleep_us, \ | |
| 721 | + timeout_us, sleep_before_read) \ | |
| 722 | +({ \ | |
| 723 | + int __ret = read_poll_timeout(phy_read, val, (cond) || val < 0, \ | |
| 724 | + sleep_us, timeout_us, sleep_before_read, phydev, regnum); \ | |
| 725 | + if (val < 0) \ | |
| 726 | + __ret = val; \ | |
| 727 | + if (__ret) \ | |
| 728 | + phydev_err(phydev, "%s failed: %d\n", __func__, __ret); \ | |
| 729 | + __ret; \ | |
| 730 | +}) | |
| 731 | + | |
| 732 | + | |
| 720 | 733 | /** |
| 721 | 734 | * __phy_read - convenience function for reading a given PHY register |
| 722 | 735 | * @phydev: the phy_device struct |