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Commit 35e2da46 authored by Sriram's avatar Sriram Committed by David S. Miller
Browse files

can:ti_hecc: Add pm hook-up 



Added the suspend and resume implementation in the HECC (CAN)
driver.

Signed-off-by: default avatarK R Baalaaji <krbaalaaji@ti.com>
Signed-off-by: default avatarSriramakrishnan <srk@ti.com>
Acked-by: default avatarAnant Gole <anantgole@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e5f8d9ac

drivers/net/can/ti_hecc.c

+48 −3
Original line number Diff line number Diff line
@@ -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");