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@bootlin.com>
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index 100b401..619c1a4 100644 (file)
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -48,6 +48,8 @@ enum {
        MV_AN_STAT1000          = 0x8001, /* 1000base-T status register */
 
        /* Vendor2 MMD registers */
+       MV_V2_PORT_CTRL         = 0xf001,
+       MV_V2_PORT_CTRL_PWRDOWN = 0x0800,
        MV_V2_TEMP_CTRL         = 0xf08a,
        MV_V2_TEMP_CTRL_MASK    = 0xc000,
        MV_V2_TEMP_CTRL_SAMPLE  = 0x0000,
@@ -226,11 +228,19 @@ static int mv3310_probe(struct phy_device *phydev)
 
 static int mv3310_suspend(struct phy_device *phydev)
 {
-       return 0;
+       return phy_set_bits_mmd(phydev, MDIO_MMD_VEND2, MV_V2_PORT_CTRL,
+                               MV_V2_PORT_CTRL_PWRDOWN);
 }
 
 static int mv3310_resume(struct phy_device *phydev)
 {
+       int ret;
+
+       ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND2, MV_V2_PORT_CTRL,
+                                MV_V2_PORT_CTRL_PWRDOWN);
+       if (ret)
+               return ret;
+
        return mv3310_hwmon_config(phydev, true);
 }