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

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Message-Id: <1384978913-8052-8-git-send-email-sebastian.hesselbarth@gmail.com>
Date:	Wed, 20 Nov 2013 21:21:53 +0100
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH RFC v1 7/7] net: cpsw: resume/suspend PHY on port start/stop

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@...il.com>
---
Cc: David S. Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.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

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