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can: flexcan: add PM support 

tested on an i.MX257

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Eric Bénard 2012-05-08 17:12:17 +02:00 committed by Marc Kleine-Budde
parent 31a67102f4
commit 8b5e218d8c
1 changed files with 38 additions and 0 deletions
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38
drivers/net/can/flexcan.c
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@ -1050,6 +1050,42 @@ static struct of_device_id flexcan_of_match[] = {
{},
};
#ifdef CONFIG_PM
static int flexcan_suspend(struct platform_device *pdev, pm_message_t state)
{
struct net_device *dev = platform_get_drvdata(pdev);
struct flexcan_priv *priv = netdev_priv(dev);
flexcan_chip_disable(priv);
if (netif_running(dev)) {
netif_stop_queue(dev);
netif_device_detach(dev);
}
priv->can.state = CAN_STATE_SLEEPING;
return 0;
}
static int flexcan_resume(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
struct flexcan_priv *priv = netdev_priv(dev);
priv->can.state = CAN_STATE_ERROR_ACTIVE;
if (netif_running(dev)) {
netif_device_attach(dev);
netif_start_queue(dev);
}
flexcan_chip_enable(priv);
return 0;
}
#else
#define flexcan_suspend NULL
#define flexcan_resume NULL
#endif
static struct platform_driver flexcan_driver = {
.driver = {
.name = DRV_NAME,
@ -1058,6 +1094,8 @@ static struct platform_driver flexcan_driver = {
},
.probe = flexcan_probe,
.remove = __devexit_p(flexcan_remove),
.suspend = flexcan_suspend,
.resume = flexcan_resume,
};
module_platform_driver(flexcan_driver);