Re: [PATCH v6 09/10] usb: roles: add USB Type-B GPIO connector driver
From: Chunfeng Yun
Date: Wed Jun 05 2019 - 22:58:06 EST
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@xxxxxxxxxxxx> 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.