linux-kernel - [PATCH 6/8] [Blackfin] EMAC driver: add power down mode

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Date:	Wed, 30 Jan 2008 16:52:26 +0800
From:	Bryan Wu <bryan.wu@...log.com>
To:	jeff@...zik.org, netdev@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Vitja Makarov <vitja.makarov@...il.com>,
	Bryan Wu <bryan.wu@...log.com>
Subject: [PATCH 6/8] [Blackfin] EMAC driver: add power down mode

From: Vitja Makarov <vitja.makarov@...il.com>

This patch puts phy in power-down mode when interface is down.
Also we should think about energy detect power-down mode, that will
decrease power consumption when no link.

Signed-off-by: Vitja Makarov <vitja.makarov@...il.com>
Signed-off-by: Bryan Wu <bryan.wu@...log.com>
---
 drivers/net/bfin_mac.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index e9bd059..f2368b7 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -884,10 +884,10 @@ static int bf537mac_open(struct net_device *dev)
 		return retval;
 
 	phy_start(lp->phydev);
+	phy_write(lp->phydev, MII_BMCR, BMCR_RESET);
 	setup_system_regs(dev);
 	bf537mac_disable();
 	bf537mac_enable();
-
 	pr_debug("hardware init finished\n");
 	netif_start_queue(dev);
 	netif_carrier_on(dev);
@@ -910,6 +910,7 @@ static int bf537mac_close(struct net_device *dev)
 	netif_carrier_off(dev);
 
 	phy_stop(lp->phydev);
+	phy_write(lp->phydev, MII_BMCR, BMCR_PDOWN);
 
 	/* clear everything */
 	bf537mac_shutdown(dev);
-- 
1.5.3.4
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