linux-kernel - [PATCH net-next 6/7] net: phy: introduce phy_read_poll

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Date:   Fri, 20 Mar 2020 00:39:09 +0800
From:   Dejin Zheng <zhengdejin5@...il.com>
To:     andrew@...n.ch, f.fainelli@...il.com, hkallweit1@...il.com,
        linux@...linux.org.uk, davem@...emloft.net, tglx@...utronix.de,
        broonie@...nel.org, corbet@....net, mchehab+samsung@...nel.org,
        netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Dejin Zheng <zhengdejin5@...il.com>
Subject: [PATCH net-next 6/7] 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.

Signed-off-by: Dejin Zheng <zhengdejin5@...il.com>
---
 include/linux/phy.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/phy.h b/include/linux/phy.h
index a30e9008647f..a28cc16fdaac 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -714,6 +714,9 @@ 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(val, cond, sleep_us, timeout_us, args...) \
+	read_poll_timeout(phy_read, val, cond, sleep_us, timeout_us, args)
+
 /**
  * __phy_read - convenience function for reading a given PHY register
  * @phydev: the phy_device struct
-- 
2.25.0