On Wed, Oct 10, 2012 at 07:35:48PM +0530, Vikas C Sajjan wrote:
> From: Vikas Sajjan <vikas.sajjan@xxxxxxxxxx>
>
> Adding the suspend and resume functionality for the XHCI driver
>
> Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
> Signed-off-by: Vikas C Sajjan <vikas.sajjan@xxxxxxxxxx>
> CC: Doug Anderson <dianders@xxxxxxxxxxxx>
Acked-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
Felipe, you want to take this?
> ---
> drivers/usb/host/xhci-plat.c | 44 ++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 44 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index df90fe5..384cf4d 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -185,11 +185,55 @@ static int xhci_plat_remove(struct platform_device *dev)
> return 0;
> }
>
> +#ifdef CONFIG_PM
> +static int xhci_plat_suspend(struct device *dev)
> +{
> + struct usb_hcd *hcd;
> + struct xhci_hcd *xhci;
> +
> + hcd = dev_get_drvdata(dev);
> + if (!hcd)
> + return -EINVAL;
> +
> + xhci = hcd_to_xhci(hcd);
> +
> + /* Make sure that the HCD Core as set state 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;
> + struct xhci_hcd *xhci;
> +
> + hcd = dev_get_drvdata(dev);
> +
> + if (!hcd)
> + return -EINVAL;
> +
> + xhci = hcd_to_xhci(hcd);
> +
> + return xhci_resume(xhci, 0);
> +}
> +
> +static const struct dev_pm_ops xhci_plat_pm_ops = {
> + .suspend = xhci_plat_suspend,
> + .resume = xhci_plat_resume,
> +};
> +#endif
> +
> static struct platform_driver usb_xhci_driver = {
> .probe = xhci_plat_probe,
> .remove = xhci_plat_remove,
> .driver = {
> .name = "xhci-hcd",
> +#ifdef CONFIG_PM
> + .pm = &xhci_plat_pm_ops,
> +#endif
> },
> };
> MODULE_ALIAS("platform:xhci-hcd");
> --
> 1.7.6.5
>
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