From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx> Subject: [PATCH] pata_sl82c105: add Power Management support Fixes IDE -> libata regression. There shouldn't be any problems with it as corresponding IDE's host driver (sl82c105) 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@xxxxxxxxx> --- earlier references: https://lkml.org/lkml/2009/11/25/385 drivers/ata/pata_sl82c105.c | 37 ++++++++++++++++++++++++++++++++----- 1 file changed, 32 insertions(+), 5 deletions(-) Index: b/drivers/ata/pata_sl82c105.c =================================================================== --- a/drivers/ata/pata_sl82c105.c +++ b/drivers/ata/pata_sl82c105.c @@ -1,6 +1,7 @@ /* * pata_sl82c105.c - SL82C105 PATA for new ATA layer * (C) 2005 Red Hat Inc + * (C) 2011 Bartlomiej Zolnierkiewicz * * Based in part on linux/drivers/ide/pci/sl82c105.c * SL82C105/Winbond 553 IDE driver @@ -278,6 +279,14 @@ static int sl82c105_bridge_revision(stru return bridge->revision; } +static void sl82c105_fixup(struct pci_dev *pdev) +{ + u32 val; + + pci_read_config_dword(pdev, 0x40, &val); + val |= CTRL_P0EN | CTRL_P0F16 | CTRL_P1F16; + pci_write_config_dword(pdev, 0x40, val); +} static int sl82c105_init_one(struct pci_dev *dev, const struct pci_device_id *id) { @@ -295,7 +304,6 @@ static int sl82c105_init_one(struct pci_ /* for now use only the first port */ const struct ata_port_info *ppi[] = { &info_early, NULL }; - u32 val; int rev; int rc; @@ -312,13 +320,28 @@ static int sl82c105_init_one(struct pci_ else ppi[0] = &info_dma; - pci_read_config_dword(dev, 0x40, &val); - val |= CTRL_P0EN | CTRL_P0F16 | CTRL_P1F16; - pci_write_config_dword(dev, 0x40, val); + sl82c105_fixup(dev); return ata_pci_bmdma_init_one(dev, ppi, &sl82c105_sht, NULL, 0); } +#ifdef CONFIG_PM +static int sl82c105_reinit_one(struct pci_dev *pdev) +{ + struct ata_host *host = dev_get_drvdata(&pdev->dev); + int rc; + + rc = ata_pci_device_do_resume(pdev); + if (rc) + return rc; + + sl82c105_fixup(pdev); + + ata_host_resume(host); + return 0; +} +#endif + static const struct pci_device_id sl82c105[] = { { PCI_VDEVICE(WINBOND, PCI_DEVICE_ID_WINBOND_82C105), }, @@ -329,7 +352,11 @@ static struct pci_driver sl82c105_pci_dr .name = DRV_NAME, .id_table = sl82c105, .probe = sl82c105_init_one, - .remove = ata_pci_remove_one + .remove = ata_pci_remove_one, +#ifdef CONFIG_PM + .suspend = ata_pci_device_suspend, + .resume = sl82c105_reinit_one, +#endif }; static int __init sl82c105_init(void) -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
