linux-kernel - [PATCH 1/3] net: phy: smsc: add proper reset flags for LAN8710A

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Message-ID: <20250709133222.48802-2-buday.csaba@prolan.hu>
Date: Wed, 9 Jul 2025 15:32:20 +0200
From: Buday Csaba <buday.csaba@...lan.hu>
To: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: Buday Csaba <buday.csaba@...lan.hu>, Csókás Bence
	<csokas.bence@...lan.hu>, 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>
Subject: [PATCH 1/3] net: phy: smsc: add proper reset flags for LAN8710A

According to the LAN8710A datasheet (Rev. B, section 3.8.5.1), a hardware
reset is required after power-on, and the reference clock (REF_CLK) must be
established before asserting reset.

Signed-off-by: Buday Csaba <buday.csaba@...lan.hu>
Cc: Csókás Bence <csokas.bence@...lan.hu>
---
 drivers/net/phy/smsc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c
index 150aea7c9c367..357e16aa4a736 100644
--- a/drivers/net/phy/smsc.c
+++ b/drivers/net/phy/smsc.c
@@ -737,6 +737,7 @@ static struct phy_driver smsc_phy_driver[] = {
 
 	/* PHY_BASIC_FEATURES */
 
+	.flags		= PHY_RST_AFTER_CLK_EN,
 	.probe		= smsc_phy_probe,
 
 	/* basic functions */
-- 
2.39.5