pata_mpc52xx: suspend/resume support

Implement suspend and resume routines for mpc52xx ata driver.
Tested on Lite5200b with deep-sleep and low-power (not yet in-tree)
modes.
Signed-off-by: NDomen Puncer <domen.puncer@telargo.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/ata/pata_mpc52xx.c

@@ -467,13 +467,27 @@ mpc52xx_ata_remove(struct of_device *op)
 static int
 mpc52xx_ata_suspend(struct of_device *op, pm_message_t state)
 {
-	return 0;	/* FIXME : What to do here ? */
+	struct ata_host *host = dev_get_drvdata(&op->dev);
+
+	return ata_host_suspend(host, state);
 }
 
 static int
 mpc52xx_ata_resume(struct of_device *op)
 {
-	return 0;	/* FIXME : What to do here ? */
+	struct ata_host *host = dev_get_drvdata(&op->dev);
+	struct mpc52xx_ata_priv *priv = host->private_data;
+	int rv;
+
+	rv = mpc52xx_ata_hw_init(priv);
+	if (rv) {
+		printk(KERN_ERR DRV_NAME ": Error during HW init\n");
+		return rv;
+	}
+
+	ata_host_resume(host);
+
+	return 0;
 }
 
 #endif