pata_pdc2027x: add Power Management support

Index: b/drivers/ata/pata_pdc2027x.c
===================================================================
@@ -63,6 +63,7 @@ enum {
 };
 
 static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
+static int pdc2027x_reinit_one(struct pci_dev *pdev);
 static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline);
 static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev);
 static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);

@@ -126,6 +127,10 @@ static struct pci_driver pdc2027x_pci_dr
 	.id_table		= pdc2027x_pci_tbl,
 	.probe			= pdc2027x_init_one,
 	.remove			= ata_pci_remove_one,
+#ifdef CONFIG_PM
+	.suspend		= ata_pci_device_suspend,
+	.resume			= pdc2027x_reinit_one,
+#endif
 };
 
 static struct scsi_host_template pdc2027x_sht = {

@@ -758,6 +763,31 @@ static int __devinit pdc2027x_init_one(s
 				 IRQF_SHARED, &pdc2027x_sht);
 }
 
+#ifdef CONFIG_PM
+static int pdc2027x_reinit_one(struct pci_dev *pdev)
+{
+	struct ata_host *host = dev_get_drvdata(&pdev->dev);
+	unsigned int board_idx;
+	int rc;
+
+	rc = ata_pci_device_do_resume(pdev);
+	if (rc)
+		return rc;
+
+	if (pdev->device == PCI_DEVICE_ID_PROMISE_20268 ||
+	    pdev->device == PCI_DEVICE_ID_PROMISE_20270)
+		board_idx = PDC_UDMA_100;
+	else
+		board_idx = PDC_UDMA_133;
+
+	if (pdc_hardware_init(host, board_idx))
+		return -EIO;
+
+	ata_host_resume(host);
+	return 0;
+}
+#endif
+
 /**
  * pdc2027x_init - Called after this module is loaded into the kernel.
  */