netdev - [PATCH net-next v2 5/7] net: bcmgenet: implement GPHY power down sequence

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Message-Id: <1427148597-28337-6-git-send-email-f.fainelli@gmail.com>
Date:	Mon, 23 Mar 2015 15:09:55 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, Florian Fainelli <f.fainelli@...il.com>,
	jaedon.shin@...il.com, pgynther@...gle.com
Subject: [PATCH net-next v2 5/7] net: bcmgenet: implement GPHY power down sequence

Implement the GPHY power down sequence by setting all power down bits, putting
the GPHY in reset, and finally cutting the 25Mhz reference clock.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/ethernet/broadcom/genet/bcmmii.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index c26c0757d755..3320219003fb 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -177,8 +177,8 @@ static void bcmgenet_phy_power_set(struct net_device *dev, bool enable)
 	if (!GENET_IS_V4(priv))
 		return;
 
+	reg = bcmgenet_ext_readl(priv, EXT_GPHY_CTRL);
 	if (enable) {
-		reg = bcmgenet_ext_readl(priv, EXT_GPHY_CTRL);
 		reg &= ~EXT_CK25_DIS;
 		bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
 		mdelay(1);
@@ -189,9 +189,14 @@ static void bcmgenet_phy_power_set(struct net_device *dev, bool enable)
 		mdelay(1);
 
 		reg &= ~EXT_GPHY_RESET;
+	} else {
+		reg |= EXT_CFG_IDDQ_BIAS | EXT_CFG_PWR_DOWN | EXT_GPHY_RESET;
 		bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
-		udelay(60);
+		mdelay(1);
+		reg |= EXT_CK25_DIS;
 	}
+	bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
+	udelay(60);
 }
 
 static void bcmgenet_internal_phy_setup(struct net_device *dev)
-- 
2.1.0

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