[PATCH v1 2/4] ide: triflex: use generic power management

Vaibhav Gupta
2020-06-24T17:30:32Z

While upgrading ide_pci_suspend() and ide_pci_resume(), all other source
files, using same callbacks, were also updated except
drivers/ide/triflex.c. This is because the driver does not want to power
off the device during suspend. A quirk was required for the same.

This patch provides the fix. Another driver,
drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c, makes use of
a quirk for similar goal. Hence a similar quirk has been applied for
triflex.

Compile-tested only.

Signed-off-by: Vaibhav Gupta <vaibhavgupta40@gmail.com>
---
drivers/ide/triflex.c | 45 +++++++++++--------------------------------
1 file changed, 11 insertions(+), 34 deletions(-)

diff --git a/drivers/ide/triflex.c b/drivers/ide/triflex.c
index 1886bbfb9e5d..f707f11c296d 100644
--- a/drivers/ide/triflex.c
+++ b/drivers/ide/triflex.c
@@ -100,48 +100,25 @@ static const struct pci_device_id triflex_pci_tbl[] = {
};
MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);

-#ifdef CONFIG_PM
-static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
-{
- /*
- * We must not disable or powerdown the device.
- * APM bios refuses to suspend if IDE is not accessible.
- */
- pci_save_state(dev);
- return 0;
-}
-
-static int triflex_ide_pci_resume(struct pci_dev *dev)
+/*
+ * We must not disable or powerdown the device.
+ * APM bios refuses to suspend if IDE is not accessible.
+ */
+static void triflex_pci_pm_cap_fixup(struct pci_dev *pdev)
{
- struct ide_host *host = pci_get_drvdata(dev);
- int rc;
-
- pci_set_power_state(dev, PCI_D0);
-
- rc = pci_enable_device(dev);
- if (rc)
- return rc;
-
- pci_restore_state(dev);
- pci_set_master(dev);
-
- if (host->init_chipset)
- host->init_chipset(dev);
-
- return 0;
+ dev_info(&pdev->dev, "Disable triflex to be turned off by PCI CORE\n");
+ pdev->pm_cap = 0;
}
-#else
-#define triflex_ide_pci_suspend NULL
-#define triflex_ide_pci_resume NULL
-#endif
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_COMPAQ,
+ PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
+ triflex_pci_pm_cap_fixup);

static struct pci_driver triflex_pci_driver = {
.name = "TRIFLEX_IDE",
.id_table = triflex_pci_tbl,
.probe = triflex_init_one,
.remove = ide_pci_remove,
- .suspend = triflex_ide_pci_suspend,
- .resume = triflex_ide_pci_resume,
+ .driver.pm = &ide_pci_pm_ops,
};

static int __init triflex_ide_init(void)
--
2.27.0