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pata_pdc2027x: add Power Management support 

Fixes IDE -> libata regression.

There shouldn't be any problems with it as corresponding IDE's host
driver (pdc202xx_new) has been supporting PCI Power Management since
Oct 10 2008 (commit feb22b7f "ide: add proper PCI PM support (v2)")
and IDE PM since Jun 14 2003 (patch v2.5.73 "ide: Power Management").

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2011-10-13 12:57:51 +02:00 committed by Jeff Garzik
parent b2f104bba3
commit adacaf1449
1 changed files with 30 additions and 0 deletions
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30
drivers/ata/pata_pdc2027x.c
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@ -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_driver = {
.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 = {
@ -754,6 +759,31 @@ static int __devinit pdc2027x_init_one(struct pci_dev *pdev, const struct pci_de
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.
*/