linux-kernel - [PATCH net-next 3/3] net: fec: reset phy on resume after power-up

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Date:   Tue, 14 Dec 2021 13:16:38 +0100
From:   Philippe Schenker <philippe.schenker@...adex.com>
To:     netdev@...r.kernel.org, Joakim Zhang <qiangqing.zhang@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Russell King <linux@...linux.org.uk>,
        Andrew Lunn <andrew@...n.ch>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Fabio Estevam <festevam@...il.com>,
        Fugang Duan <fugang.duan@....com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 3/3] net: fec: reset phy on resume after power-up

Reset the eth PHY after resume in case the power was switched off
during suspend, this is required by some PHYs if the reset signal
is controlled by software.

Signed-off-by: Philippe Schenker <philippe.schenker@...adex.com>

---

 drivers/net/ethernet/freescale/fec_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 1b1f7f2a6130..c29eddbb0155 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -4086,6 +4086,7 @@ static int __maybe_unused fec_resume(struct device *dev)
 		ret = regulator_enable(fep->reg_phy);
 		if (ret)
 			return ret;
+		phy_reset_after_power_on(ndev->phydev);
 	}
 
 	rtnl_lock();
-- 
2.34.1