[PATCH RFC v1 7/7] net: cpsw: resume/suspend PHY on port start/stop

[Sebastian Hesselbarth]

Network PHYs consume a noticable amount of power. This adds phy_resume
on slave_open and phy_suspend on slave_stop to save this power if the
port is down anyway.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth at gmail.com>
---
Cc: David S. Miller <davem at davemloft.net>
Cc: netdev at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
---
 drivers/net/ethernet/ti/cpsw.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 90d41d2..f1dc54f 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -1013,6 +1013,7 @@ static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
 	} else {
 		dev_info(priv->dev, "phy found : id is : 0x%x\n",
 			 slave->phy->phy_id);
+		phy_resume(slave->phy);
 		phy_start(slave->phy);
 
 		/* Configure GMII_SEL register */
@@ -1081,6 +1082,7 @@ static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_priv *priv)
 	if (!slave->phy)
 		return;
 	phy_stop(slave->phy);
+	phy_suspend(slave->phy);
 	phy_disconnect(slave->phy);
 	slave->phy = NULL;
 }
-- 
1.7.2.5