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ks8851: suspend resume support 

Add suspend/resume support using default open/stop interface methods
to do hardware dependant operations.

On suspend, same low power state (soft power mode) will be kept, the
following blocks will be disabled:

 - Internal PLL Clock
 - Tx/Rx PHY
 - MAC
 - SPI Interface

Signed-off-by: Abraham Arce <x0066660@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Arce, Abraham 2010-10-28 18:57:20 +00:00 committed by David S. Miller
parent d0eaeec8e8
commit 1d5439b9a2
1 changed files with 33 additions and 0 deletions
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33
drivers/net/ks8851.c
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@ -1545,6 +1545,37 @@ static int ks8851_read_selftest(struct ks8851_net *ks)
/* driver bus management functions */
#ifdef CONFIG_PM
static int ks8851_suspend(struct spi_device *spi, pm_message_t state)
{
struct ks8851_net *ks = dev_get_drvdata(&spi->dev);
struct net_device *dev = ks->netdev;
if (netif_running(dev)) {
netif_device_detach(dev);
ks8851_net_stop(dev);
}
return 0;
}
static int ks8851_resume(struct spi_device *spi)
{
struct ks8851_net *ks = dev_get_drvdata(&spi->dev);
struct net_device *dev = ks->netdev;
if (netif_running(dev)) {
ks8851_net_open(dev);
netif_device_attach(dev);
}
return 0;
}
#else
#define ks8851_suspend NULL
#define ks8851_resume NULL
#endif
static int __devinit ks8851_probe(struct spi_device *spi)
{
struct net_device *ndev;
@ -1679,6 +1710,8 @@ static struct spi_driver ks8851_driver = {
},
.probe = ks8851_probe,
.remove = __devexit_p(ks8851_remove),
.suspend = ks8851_suspend,
.resume = ks8851_resume,
};
static int __init ks8851_init(void)