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| author | Shawn Guo <shawn.guo@freescale.com> | 2011-01-05 21:13:12 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-09 15:42:56 -0800 |
| commit | bcc67771ed8ee31cc1f2b1e033ae822b40c72ff9 (patch) | |
| tree | 1b41ce6cd2fd9f4af71c2bbe2a6084e5c8f0bcd1 /drivers/net/fec.c | |
| parent | 49da97dcb6b00a6869bbc3fa6ec7fdfd8a6e41a3 (diff) | |
| download | blackbird-op-linux-bcc67771ed8ee31cc1f2b1e033ae822b40c72ff9.tar.gz blackbird-op-linux-bcc67771ed8ee31cc1f2b1e033ae822b40c72ff9.zip | |
net/fec: improve pm for better suspend/resume
The following commit made a fix to use fec_enet_open/fec_enet_close
over fec_enet_init/fec_stop for suspend/resume, because fec_enet_init
does not allow to have a working network interface at resume.
e3fe8558c7fc182972c3d947d88744482111f304
net/fec: fix pm to survive to suspend/resume
This fix works for i.mx/mxc fec controller, but fails on mx28 fec
which gets a different interrupt logic design. On i.mx fec, interrupt
can be triggered even bit ETHER_EN of ECR register is not set. But
on mx28 fec, ETHER_EN must be set to get interrupt work. Meanwhile,
MII interrupt is mandatory to resume the driver, because MDIO
read/write changed to interrupt mode by commit below.
97b72e4320a9aaa4a7f1592ee7d2da7e2c9bd349
fec: use interrupt for MDIO completion indication
fec_restart/fec_stop comes out as the solution working for both
cases.
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/fec.c')
| -rw-r--r-- | drivers/net/fec.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/net/fec.c b/drivers/net/fec.c index 47a3c7b499e9..8a1c51f86414 100644 --- a/drivers/net/fec.c +++ b/drivers/net/fec.c @@ -1372,8 +1372,10 @@ fec_suspend(struct device *dev) if (ndev) { fep = netdev_priv(ndev); - if (netif_running(ndev)) - fec_enet_close(ndev); + if (netif_running(ndev)) { + fec_stop(ndev); + netif_device_detach(ndev); + } clk_disable(fep->clk); } return 0; @@ -1388,8 +1390,10 @@ fec_resume(struct device *dev) if (ndev) { fep = netdev_priv(ndev); clk_enable(fep->clk); - if (netif_running(ndev)) - fec_enet_open(ndev); + if (netif_running(ndev)) { + fec_restart(ndev, fep->full_duplex); + netif_device_attach(ndev); + } } return 0; } |
