diff options
| author | Sriram <srk@ti.com> | 2010-02-22 03:35:36 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-22 15:45:53 -0800 |
| commit | 35e2da46d25a53e0e19956f533cc29272a6cceb2 (patch) | |
| tree | aa06cfa5bd76ce759c6f22f9c6c13719f86a19b2 | |
| parent | e5f8d9ac46e0291594abaa76bf467a08367bcccf (diff) | |
can:ti_hecc: Add pm hook-up
Added the suspend and resume implementation in the HECC (CAN)
driver.
Signed-off-by: K R Baalaaji <krbaalaaji@ti.com>
Signed-off-by: Sriramakrishnan <srk@ti.com>
Acked-by: Anant Gole <anantgole@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/can/ti_hecc.c | 51 |
1 files changed, 48 insertions, 3 deletions
diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c index 8332e242b0b..b861cd56107 100644 --- a/drivers/net/can/ti_hecc.c +++ b/drivers/net/can/ti_hecc.c @@ -826,7 +826,6 @@ static int ti_hecc_open(struct net_device *ndev) return err; } - clk_enable(priv->clk); ti_hecc_start(ndev); napi_enable(&priv->napi); netif_start_queue(ndev); @@ -842,7 +841,6 @@ static int ti_hecc_close(struct net_device *ndev) napi_disable(&priv->napi); ti_hecc_stop(ndev); free_irq(ndev->irq, ndev); - clk_disable(priv->clk); close_candev(ndev); return 0; @@ -928,6 +926,7 @@ static int ti_hecc_probe(struct platform_device *pdev) netif_napi_add(ndev, &priv->napi, ti_hecc_rx_poll, HECC_DEF_NAPI_WEIGHT); + clk_enable(priv->clk); err = register_candev(ndev); if (err) { dev_err(&pdev->dev, "register_candev() failed\n"); @@ -956,6 +955,7 @@ static int __devexit ti_hecc_remove(struct platform_device *pdev) struct net_device *ndev = platform_get_drvdata(pdev); struct ti_hecc_priv *priv = netdev_priv(ndev); + clk_disable(priv->clk); clk_put(priv->clk); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); iounmap(priv->base); @@ -967,6 +967,48 @@ static int __devexit ti_hecc_remove(struct platform_device *pdev) return 0; } + +#ifdef CONFIG_PM +static int ti_hecc_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct ti_hecc_priv *priv = netdev_priv(dev); + + if (netif_running(dev)) { + netif_stop_queue(dev); + netif_device_detach(dev); + } + + hecc_set_bit(priv, HECC_CANMC, HECC_CANMC_PDR); + priv->can.state = CAN_STATE_SLEEPING; + + clk_disable(priv->clk); + + return 0; +} + +static int ti_hecc_resume(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct ti_hecc_priv *priv = netdev_priv(dev); + + clk_enable(priv->clk); + + hecc_clear_bit(priv, HECC_CANMC, HECC_CANMC_PDR); + priv->can.state = CAN_STATE_ERROR_ACTIVE; + + if (netif_running(dev)) { + netif_device_attach(dev); + netif_start_queue(dev); + } + + return 0; +} +#else +#define ti_hecc_suspend NULL +#define ti_hecc_resume NULL +#endif + /* TI HECC netdevice driver: platform driver structure */ static struct platform_driver ti_hecc_driver = { .driver = { @@ -975,6 +1017,8 @@ static struct platform_driver ti_hecc_driver = { }, .probe = ti_hecc_probe, .remove = __devexit_p(ti_hecc_remove), + .suspend = ti_hecc_suspend, + .resume = ti_hecc_resume, }; static int __init ti_hecc_init_driver(void) @@ -982,14 +1026,15 @@ static int __init ti_hecc_init_driver(void) printk(KERN_INFO DRV_DESC "\n"); return platform_driver_register(&ti_hecc_driver); } -module_init(ti_hecc_init_driver); static void __exit ti_hecc_exit_driver(void) { printk(KERN_INFO DRV_DESC " unloaded\n"); platform_driver_unregister(&ti_hecc_driver); } + module_exit(ti_hecc_exit_driver); +module_init(ti_hecc_init_driver); MODULE_AUTHOR("Anant Gole <anantgole@ti.com>"); MODULE_LICENSE("GPL v2"); |