[PATCH v6 09/10] usb: roles: add USB Type-B GPIO connector driver

Chunfeng Yun chunfeng.yun at mediatek.com
Wed Jun 5 19:53:51 PDT 2019


On Wed, 2019-06-05 at 11:45 +0300, Andy Shevchenko wrote:
> On Wed, May 29, 2019 at 10:44 AM Chunfeng Yun <chunfeng.yun at mediatek.com> wrote:
> >
> > Due to the requirement of usb-connector.txt binding, the old way
> > using extcon to support USB Dual-Role switch is now deprecated
> > when use Type-B connector.
> > This patch introduces a driver of Type-B connector which typically
> > uses an input GPIO to detect USB ID pin, and try to replace the
> > function provided by extcon-usb-gpio driver
> 
> > +static SIMPLE_DEV_PM_OPS(usb_conn_pm_ops,
> > +                        usb_conn_suspend, usb_conn_resume);
> > +
> > +#define DEV_PMS_OPS (IS_ENABLED(CONFIG_PM_SLEEP) ? &usb_conn_pm_ops : NULL)
> 
> Why this macro is needed?
Want to set .pm as NULL when CONFIG_PM_SLEEP is not enabled.

Thanks
> 





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