net: phy: bcm7xxx: enable auto power down
The 28nm process BCM7xxx internal Gigabit PHYs all support automatic
power down, turn on that feature as part of the configuration
initialization callback.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/phy/bcm7xxx.c b/drivers/net/phy/bcm7xxx.c
index fdce1ea..29e256a 100644
--- a/drivers/net/phy/bcm7xxx.c
+++ b/drivers/net/phy/bcm7xxx.c
@@ -146,6 +146,27 @@
return 0;
}
+static int bcm7xxx_apd_enable(struct phy_device *phydev)
+{
+ int val;
+
+ /* Enable powering down of the DLL during auto-power down */
+ val = bcm54xx_shadow_read(phydev, BCM54XX_SHD_SCR3);
+ if (val < 0)
+ return val;
+
+ val |= BCM54XX_SHD_SCR3_DLLAPD_DIS;
+ bcm54xx_shadow_write(phydev, BCM54XX_SHD_SCR3, val);
+
+ /* Enable auto-power down */
+ val = bcm54xx_shadow_read(phydev, BCM54XX_SHD_APD);
+ if (val < 0)
+ return val;
+
+ val |= BCM54XX_SHD_APD_EN;
+ return bcm54xx_shadow_write(phydev, BCM54XX_SHD_APD, val);
+}
+
static int bcm7xxx_28nm_config_init(struct phy_device *phydev)
{
int ret;
@@ -154,7 +175,11 @@
if (ret)
return ret;
- return bcm7xxx_28nm_afe_config_init(phydev);
+ ret = bcm7xxx_28nm_afe_config_init(phydev);
+ if (ret)
+ return ret;
+
+ return bcm7xxx_apd_enable(phydev);
}
static int bcm7xxx_28nm_resume(struct phy_device *phydev)