diff options
| author | Fugang Duan <B38611@freescale.com> | 2011-11-04 16:13:43 +0800 |
|---|---|---|
| committer | Justin Waters <justin.waters@timesys.com> | 2012-07-03 16:55:11 -0400 |
| commit | af15a70de03fdef0790e0c439fcf193c730288cc (patch) | |
| tree | 67241288f16f138df2dc1e920b91da7a23d7d90f | |
| parent | 5e13c6a5730ce994c9019af1582663e9eaf25de9 (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>
| -rw-r--r-- | drivers/net/fec.c | 17 | ||||
| -rw-r--r-- | include/linux/fec.h | 1 |
2 files changed, 16 insertions, 2 deletions
diff --git a/drivers/net/fec.c b/drivers/net/fec.c index 710824044abc..f9f73505891e 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> @@ -684,6 +685,7 @@ static void fec_enet_adjust_link(struct net_device *ndev) { struct fec_enet_private *fep = netdev_priv(ndev); 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; @@ -698,6 +700,8 @@ static void fec_enet_adjust_link(struct net_device *ndev) /* 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(ndev, phy_dev->duplex); status_change = 1; @@ -717,8 +721,11 @@ static void fec_enet_adjust_link(struct net_device *ndev) 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) @@ -1071,7 +1078,9 @@ fec_enet_open(struct net_device *ndev) * a simple way to do that. */ - ret = fec_enet_alloc_buffers(ndev); + if (!clk_get_usecount(fep->clk)) + clk_enable(fep->clk); + ret = fec_enet_alloc_buffers(dev); if (ret) return ret; @@ -1110,6 +1119,10 @@ fec_enet_close(struct net_device *ndev) fec_enet_free_buffers(ndev); + /* Clock gate close for saving power */ + if (clk_get_usecount(fep->clk)) + clk_disable(fep->clk); + return 0; } diff --git a/include/linux/fec.h b/include/linux/fec.h index d6a07048f842..8f69cb58d458 100644 --- a/include/linux/fec.h +++ b/include/linux/fec.h @@ -18,6 +18,7 @@ struct fec_platform_data { int (*init) (struct phy_device *); + int (*power_hibernate) (struct phy_device *); phy_interface_t phy; unsigned char mac[ETH_ALEN]; }; |