linux-kernel - [PATCH net-next 2/6] net: phy: dp83869: Perform software restart after configuring op mode

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Message-Id: <20240701-b4-dp83869-sfp-v1-2-a71d6d0ad5f8@bootlin.com>
Date: Mon, 01 Jul 2024 10:51:04 +0200
From: Romain Gantois <romain.gantois@...tlin.com>
To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Romain Gantois <romain.gantois@...tlin.com>
Subject: [PATCH net-next 2/6] net: phy: dp83869: Perform software restart
 after configuring op mode

The DP83869 PHY requires a software restart after OP_MODE is changed in the
OP_MODE_DECODE register.

Add this restart in dp83869_configure_mode().

Signed-off-by: Romain Gantois <romain.gantois@...tlin.com>
---
 drivers/net/phy/dp83869.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/phy/dp83869.c b/drivers/net/phy/dp83869.c
index f6b05e3a3173e..6bb9bb1c0e962 100644
--- a/drivers/net/phy/dp83869.c
+++ b/drivers/net/phy/dp83869.c
@@ -786,6 +786,10 @@ static int dp83869_configure_mode(struct phy_device *phydev,
 		return -EINVAL;
 	}

+	ret = phy_write(phydev, DP83869_CTRL, DP83869_SW_RESTART);
+
+	usleep_range(10, 20);
+
 	return ret;
 }

-- 
2.45.2