On Sat, Oct 13, 2012 at 06:40:23PM +0530, Vikas Sajjan wrote: > Adding the suspend and resume funtionality to DWC3 core.
typo -> functionality.
Also this is quite lame as a commit log. I'm sure you can do better than
this.
> Signed-off-by: Abhilash Kesavan <a.kesa...@samsung.com>
> Signed-off-by: Vikas C Sajjan <vikas.saj...@linaro.org>
> CC: Doug Anderson <diand...@chromium.org>
> ---
> drivers/usb/dwc3/core.c | 54
> +++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 54 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index b415c0c..0699061 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -622,11 +622,65 @@ static int __devexit dwc3_remove(struct platform_device
> *pdev)
> return 0;
> }
>
> +#ifdef CONFIG_PM
> +static int dwc3_resume(struct device *dev)
> +{
> + struct dwc3 *dwc = dev_get_drvdata(dev);
> + int ret;
> +
> + usb_phy_init(dwc->usb2_phy);
> + usb_phy_init(dwc->usb3_phy);
> +
> + ret = dwc3_event_buffers_setup(dwc);
> + if (ret < 0)
> + return ret;
> +
> + switch (dwc->mode) {
> + case DWC3_MODE_DEVICE:
> + dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
> + break;
> + case DWC3_MODE_HOST:
> + dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
> + break;
> + case DWC3_MODE_DRD:
> + dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
> + }
this is wrong. You should be calling dwc3_core_init(). Databook is very
clear that we _must_ use a softreset to make sure PHY and DWC3 are in
sync, otherwise some rather difficult-to-debug bugs might show up.
> +
> + /* runtime set active to reflect active state. */
> + pm_runtime_disable(dev);
> + pm_runtime_set_active(dev);
> + pm_runtime_enable(dev);
> +
> + return 0;
> +}
> +
> +static int dwc3_suspend(struct device *dev)
> +{
> + struct dwc3 *dwc = dev_get_drvdata(dev);
> +
> + dwc3_event_buffers_cleanup(dwc);
> +
> + usb_phy_shutdown(dwc->usb2_phy);
> + usb_phy_shutdown(dwc->usb3_phy);
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops dwc3_pm_ops = {
> + .suspend = dwc3_suspend,
> + .resume = dwc3_resume,
> +};
> +#define DWC3_PM_OPS &(dwc3_pm_ops)
> +#else
> +#define DWC3_PM_OPS NULL
> +#endif /* CONFIG_PM */
> +
> static struct platform_driver dwc3_driver = {
> .probe = dwc3_probe,
> .remove = __devexit_p(dwc3_remove),
> .driver = {
> .name = "dwc3",
> + .pm = DWC3_PM_OPS,
> },
> };
>
> --
> 1.7.6.5
>
--
balbi
signature.asc
Description: Digital signature
