diff options
| author | Fugang Duan <B38611@freescale.com> | 2011-11-04 16:13:43 +0800 |
|---|---|---|
| committer | Eric Miao <eric.miao@canonical.com> | 2011-11-10 07:39:06 +0800 |
| commit | a01c210b8f6a2209c2f791768527b465c70c1dfc (patch) | |
| tree | f22e616e6cb5ee251384d3147b5dc9a1f20426d4 /drivers/net/fec.c | |
| parent | 8350f22a27affd4c14e62331cdbea3c349a17cf4 (diff) | |
ENGR00159982 - FEC: low power mode when FEC is no use.
- Set phy AR8031 to save power mode when no cable connect.
- Close enet clock gate when FEC is no use.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Diffstat (limited to 'drivers/net/fec.c')
| -rw-r--r-- | drivers/net/fec.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/net/fec.c b/drivers/net/fec.c index fd519571cbb..2022af73e19 100644 --- a/drivers/net/fec.c +++ b/drivers/net/fec.c @@ -42,6 +42,7 @@ #include <linux/io.h> #include <linux/irq.h> #include <linux/clk.h> +#include <mach/clock.h> #include <linux/platform_device.h> #include <linux/phy.h> #include <linux/fec.h> @@ -697,6 +698,7 @@ static void fec_enet_adjust_link(struct net_device *dev) { struct fec_enet_private *fep = netdev_priv(dev); struct phy_device *phy_dev = fep->phy_dev; + struct fec_platform_data *pdata = fep->pdev->dev.platform_data; unsigned long flags; int status_change = 0; @@ -711,6 +713,8 @@ static void fec_enet_adjust_link(struct net_device *dev) /* Duplex link change */ if (phy_dev->link) { + if (!clk_get_usecount(fep->clk)) + clk_enable(fep->clk); if (fep->full_duplex != phy_dev->duplex) { fec_restart(dev, phy_dev->duplex); status_change = 1; @@ -730,8 +734,11 @@ static void fec_enet_adjust_link(struct net_device *dev) spin_unlock: spin_unlock_irqrestore(&fep->hw_lock, flags); - if (status_change) + if (status_change) { + if (!phy_dev->link && phy_dev && pdata && pdata->power_hibernate) + pdata->power_hibernate(phy_dev); phy_print_status(phy_dev); + } } static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum) @@ -1086,6 +1093,8 @@ fec_enet_open(struct net_device *dev) * a simple way to do that. */ + if (!clk_get_usecount(fep->clk)) + clk_enable(fep->clk); ret = fec_enet_alloc_buffers(dev); if (ret) return ret; @@ -1123,6 +1132,10 @@ fec_enet_close(struct net_device *dev) fec_enet_free_buffers(dev); + /* Clock gate close for saving power */ + if (clk_get_usecount(fep->clk)) + clk_disable(fep->clk); + return 0; } |