[PATCH 4/6] usb: xhci-mtk: add support runtime PM

[Chunfeng Yun]

Hi Ikjoon,

On Thu, 2021-04-08 at 17:35 +0800, Chunfeng Yun wrote:
> A dedicated wakeup irq will be used to handle runtime suspend/resume,
> we use dev_pm_set_dedicated_wake_irq API to take care of requesting
> and attaching wakeup irq, then the suspend/resume framework will help
> to enable/disable wakeup irq.
> 
> The runtime PM is default off since some platforms may not support it.
> users can enable it via power/control (set "auto") in sysfs.
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun at mediatek.com>
> ---
>  drivers/usb/host/xhci-mtk.c | 140 +++++++++++++++++++++++++++++++-----
>  1 file changed, 124 insertions(+), 16 deletions(-)

Please help to test the series on mt8192 chromebook, thanks a lot