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

From: Bryan Wu
Date: Wed Jan 30 2008 - 03:54:33 EST


From: Vitja Makarov <vitja.makarov@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Bryan Wu <bryan.wu@xxxxxxxxxx>
---
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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