linux-kernel - [PATCH net v1] net: phy: mxl-86110: Add power management and soft reset support

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Message-ID: <20251216162534.141825-1-stefano.r@variscite.com>
Date: Tue, 16 Dec 2025 17:25:34 +0100
From: Stefano Radaelli <stefano.radaelli21@...il.com>
To: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Stefano Radaelli <stefano.r@...iscite.com>,
	Xu Liang <lxu@...linear.com>,
	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>,
	Stefano Radaelli <stefano.radaelli21@...il.com>
Subject: [PATCH net v1] net: phy: mxl-86110: Add power management and soft reset support

Implement soft_reset, suspend, and resume callbacks using
genphy_soft_reset(), genphy_suspend(), and genphy_resume()
to fix PHY initialization and power management issues.

The soft_reset callback is needed to properly recover the PHY after an
ifconfig down/up cycle. Without it, the PHY can remain in power-down
state, causing MDIO register access failures during config_init().
The soft reset ensures the PHY is operational before configuration.

The suspend/resume callbacks enable proper power management during
system suspend/resume cycles.

Fixes: b2908a989c59 ("net: phy: add driver for MaxLinear MxL86110 PHY")
Signed-off-by: Stefano Radaelli <stefano.r@...iscite.com>
---
 drivers/net/phy/mxl-86110.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/phy/mxl-86110.c b/drivers/net/phy/mxl-86110.c
index e5d137a37a1d..42a5fe3f115f 100644
--- a/drivers/net/phy/mxl-86110.c
+++ b/drivers/net/phy/mxl-86110.c
@@ -938,6 +938,9 @@ static struct phy_driver mxl_phy_drvs[] = {
 		PHY_ID_MATCH_EXACT(PHY_ID_MXL86110),
 		.name			= "MXL86110 Gigabit Ethernet",
 		.config_init		= mxl86110_config_init,
+		.suspend		= genphy_suspend,
+		.resume			= genphy_resume,
+		.soft_reset		= genphy_soft_reset,
 		.get_wol		= mxl86110_get_wol,
 		.set_wol		= mxl86110_set_wol,
 		.led_brightness_set	= mxl86110_led_brightness_set,
-- 
2.47.3