From 9df54ddab9aa91d53b672b1c0efbeb5d07919e66 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Fri, 22 Aug 2014 18:55:41 -0700 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- drivers/net/phy/bcm7xxx.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/bcm7xxx.c b/drivers/net/phy/bcm7xxx.c index fdce1ea28790..29e256a4ed57 100644 --- a/drivers/net/phy/bcm7xxx.c +++ b/drivers/net/phy/bcm7xxx.c @@ -146,6 +146,27 @@ static int bcm7xxx_28nm_afe_config_init(struct phy_device *phydev) 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 @@ static int bcm7xxx_28nm_config_init(struct phy_device *phydev) 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) -- 2.20.1