netdev - [PATCH net-next 1/3] net: phy: marvell10g: implement suspend/resume callbacks

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Message-Id: <20190228134837.32740-2-antoine.tenart@bootlin.com>
Date:   Thu, 28 Feb 2019 14:48:35 +0100
From:   Antoine Tenart <antoine.tenart@...tlin.com>
To:     davem@...emloft.net, linux@...linux.org.uk, andrew@...n.ch,
        f.fainelli@...il.com, hkallweit1@...il.com
Cc:     Antoine Tenart <antoine.tenart@...tlin.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        thomas.petazzoni@...tlin.com, maxime.chevallier@...tlin.com,
        gregory.clement@...tlin.com, miquel.raynal@...tlin.com,
        nadavh@...vell.com, stefanc@...vell.com, ymarkman@...vell.com,
        mw@...ihalf.com
Subject: [PATCH net-next 1/3] net: phy: marvell10g: implement suspend/resume callbacks

This patch adds the suspend/resume callbacks for Marvell 10G PHYs. The
three PCS (base-t, base-r and 1000base-x) are set in low power (the PCS
are powered down) when the PHY isn't used.

Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>
---
 drivers/net/phy/marvell10g.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index 79106e70010f..95aeeda0eb16 100644
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -201,6 +201,30 @@ static int mv3310_hwmon_probe(struct phy_device *phydev)
 }
 #endif
 
+static int mv3310_suspend(struct phy_device *phydev)
+{
+	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_T + MDIO_CTRL1,
+		       MDIO_CTRL1_LPOWER, MDIO_CTRL1_LPOWER);
+	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_R + MDIO_CTRL1,
+		       MDIO_CTRL1_LPOWER, MDIO_CTRL1_LPOWER);
+	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_1000BASEX + MDIO_CTRL1,
+		       MDIO_CTRL1_LPOWER, MDIO_CTRL1_LPOWER);
+
+	return 0;
+}
+
+static int mv3310_resume(struct phy_device *phydev)
+{
+	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_T + MDIO_CTRL1,
+		       MDIO_CTRL1_LPOWER, 0);
+	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_R + MDIO_CTRL1,
+		       MDIO_CTRL1_LPOWER, 0);
+	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_1000BASEX + MDIO_CTRL1,
+		       MDIO_CTRL1_LPOWER, 0);
+
+	return mv3310_hwmon_config(phydev, true);
+}
+
 static int mv3310_probe(struct phy_device *phydev)
 {
 	struct mv3310_priv *priv;
-- 
2.20.1