[libata] pata_bf54x: Add proper PM operation

[akpm@linux-foundation.org: remove ifdefs, make things static]
Signed-off-by: NSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: NBryan Wu <cooloney@kernel.org>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

drivers/ata/pata_bf54x.c

@@ -1632,6 +1632,8 @@ static int __devinit bfin_atapi_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	dev_set_drvdata(&pdev->dev, host);
+
 	return 0;
 }
 
@@ -1648,6 +1650,7 @@ static int __devexit bfin_atapi_remove(struct platform_device *pdev)
 	struct ata_host *host = dev_get_drvdata(dev);
 
 	ata_host_detach(host);
+	dev_set_drvdata(&pdev->dev, NULL);
 
 	peripheral_free_list(atapi_io_port);
 
@@ -1655,27 +1658,44 @@ static int __devexit bfin_atapi_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM
-int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
+static int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
 {
-	return 0;
+	struct ata_host *host = dev_get_drvdata(&pdev->dev);
+	if (host)
+		return ata_host_suspend(host, state);
+	else
+		return 0;
 }
 
-int bfin_atapi_resume(struct platform_device *pdev)
+static int bfin_atapi_resume(struct platform_device *pdev)
 {
+	struct ata_host *host = dev_get_drvdata(&pdev->dev);
+	int ret;
+
+	if (host) {
+		ret = bfin_reset_controller(host);
+		if (ret) {
+			printk(KERN_ERR DRV_NAME ": Error during HW init\n");
+			return ret;
+		}
+		ata_host_resume(host);
+	}
+
 	return 0;
 }
+#else
+#define bfin_atapi_suspend NULL
+#define bfin_atapi_resume NULL
 #endif
 
 static struct platform_driver bfin_atapi_driver = {
 	.probe			= bfin_atapi_probe,
 	.remove			= __devexit_p(bfin_atapi_remove),
+	.suspend		= bfin_atapi_suspend,
+	.resume			= bfin_atapi_resume,
 	.driver = {
 		.name		= DRV_NAME,
 		.owner		= THIS_MODULE,
-#ifdef CONFIG_PM
-		.suspend	= bfin_atapi_suspend,
-		.resume		= bfin_atapi_resume,
-#endif
 	},
 };