linux-kernel - [PATCH net-next v7 04/10] net: phy: bcm84881: use phy_read_mmd_poll

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Message-Id: <20200323150600.21382-5-zhengdejin5@gmail.com>
Date:   Mon, 23 Mar 2020 23:05:54 +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, corbet@....net,
        tglx@...utronix.de, gregkh@...uxfoundation.org,
        allison@...utok.net, mchehab+samsung@...nel.org,
        netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Dejin Zheng <zhengdejin5@...il.com>
Subject: [PATCH net-next v7 04/10] net: phy: bcm84881: use phy_read_mmd_poll_timeout() to simplify the code

use phy_read_mmd_poll_timeout() to replace the poll codes for
simplify bcm84881_wait_init() function.

Reviewed-by: Andrew Lunn <andrew@...n.ch>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Dejin Zheng <zhengdejin5@...il.com>
---
v6 -> v7:
	- adapt to a newly added parameter sleep_before_read.
v5 -> v6:
	- no changed
v4 -> v5:
	- no changed
v3 -> v4:
	- no changed
v2 -> v3:
	- adapt to it after modifying the parameter order of the
	  newly added function
v1 -> v2:
	- remove the handle of phy_read_mmd's return error.

 drivers/net/phy/bcm84881.c | 27 ++++-----------------------
 1 file changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/net/phy/bcm84881.c b/drivers/net/phy/bcm84881.c
index 14d55a77eb28..3840d2adbbb9 100644
--- a/drivers/net/phy/bcm84881.c
+++ b/drivers/net/phy/bcm84881.c
@@ -22,30 +22,11 @@ enum {
 
 static int bcm84881_wait_init(struct phy_device *phydev)
 {
-	unsigned int tries = 20;
-	int ret, val;
-
-	do {
-		val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1);
-		if (val < 0) {
-			ret = val;
-			break;
-		}
-		if (!(val & MDIO_CTRL1_RESET)) {
-			ret = 0;
-			break;
-		}
-		if (!--tries) {
-			ret = -ETIMEDOUT;
-			break;
-		}
-		msleep(100);
-	} while (1);
+	int val;
 
-	if (ret)
-		phydev_err(phydev, "%s failed: %d\n", __func__, ret);
-
-	return ret;
+	return phy_read_mmd_poll_timeout(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1,
+					 val, !(val & MDIO_CTRL1_RESET),
+					 100000, 2000000, false);
 }
 
 static int bcm84881_config_init(struct phy_device *phydev)
-- 
2.25.0