Adds power management support to XHCI platform driver. This patch facilitates the transition of xHCI host controller between S0 and S3/S4 power states, during suspend/resume cycles. Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx> Signed-off-by: Vikas C Sajjan <vikas.sajjan@xxxxxxxxxx> CC: Doug Anderson <dianders@xxxxxxxxxxxx> --- drivers/usb/host/xhci-plat.c | 28 ++++++++++++++++++++++++++++ 1 files changed, 28 insertions(+), 0 deletions(-) diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index df90fe5..eaf3a07 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -185,11 +185,39 @@ static int xhci_plat_remove(struct platform_device *dev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int xhci_plat_suspend(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + + /* Make sure that the HCD Core has set state to HC_STATE_SUSPENDED */ + if (hcd->state != HC_STATE_SUSPENDED || + xhci->shared_hcd->state != HC_STATE_SUSPENDED) + return -EINVAL; + + return xhci_suspend(xhci); +} + +static int xhci_plat_resume(struct device *dev) +{ + struct usb_hcd *hcd = dev_get_drvdata(dev); + struct xhci_hcd *xhci = hcd_to_xhci(hcd); + + return xhci_resume(xhci, 0); +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops xhci_plat_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume) +}; + static struct platform_driver usb_xhci_driver = { .probe = xhci_plat_probe, .remove = xhci_plat_remove, .driver = { .name = "xhci-hcd", + .pm = &xhci_plat_pm_ops, }, }; MODULE_ALIAS("platform:xhci-hcd"); -- 1.7.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html