On Wed, Oct 09, 2024 at 05:42:55AM +0000, Guan-Yu Lin wrote:
> Separate dev_pm_ops for different power events such as suspend, thaw,
> and hibernation. This is crucial when dwc3 driver needs to adapt its
> behavior based on different power state changes.
>
> Signed-off-by: Guan-Yu Lin <guanyulin@xxxxxxxxxx>
> ---
> drivers/usb/dwc3/core.c | 77 ++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 76 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index b25d80f318a9..2fdafbcbe44c 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -2582,6 +2582,76 @@ static int dwc3_resume(struct device *dev)
> return 0;
> }
>
> +static int dwc3_freeze(struct device *dev)
> +{
> + struct dwc3 *dwc = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = dwc3_suspend_common(dwc, PMSG_FREEZE);
> + if (ret)
> + return ret;
> +
> + pinctrl_pm_select_sleep_state(dev);
> +
> + return 0;
> +}
> +
> +static int dwc3_thaw(struct device *dev)
> +{
> + struct dwc3 *dwc = dev_get_drvdata(dev);
> + int ret;
> +
> + pinctrl_pm_select_default_state(dev);
> +
> + pm_runtime_disable(dev);
> + pm_runtime_set_active(dev);
> +
> + ret = dwc3_resume_common(dwc, PMSG_THAW);
> + if (ret) {
> + pm_runtime_set_suspended(dev);
> + return ret;
> + }
> +
> + pm_runtime_enable(dev);
> +
> + return 0;
> +}
> +
> +static int dwc3_poweroff(struct device *dev)
> +{
> + struct dwc3 *dwc = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = dwc3_suspend_common(dwc, PMSG_HIBERNATE);
Why is power off hibernate?
This needs an ack from the dwc3 maintainer as I can't determine if it's
correct at all...
thanks,
greg k-h
