On Fri, Mar 01, 2024, Wesley Cheng wrote:
> Hi Greg,
>
> On 3/1/2024 1:45 PM, Greg KH wrote:
> > On Fri, Mar 01, 2024 at 01:35:54PM -0800, Wesley Cheng wrote:
> > > Add revision value for identifying DWC31 version 2.00a based controllers.
> > >
> > > Signed-off-by: Wesley Cheng <quic_wcheng@xxxxxxxxxxx>
> > > ---
> > > drivers/usb/dwc3/core.h | 1 +
> > > 1 file changed, 1 insertion(+)
> > >
> > > diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
> > > index df544ec730d2..f3bbbc1947bd 100644
> > > --- a/drivers/usb/dwc3/core.h
> > > +++ b/drivers/usb/dwc3/core.h
> > > @@ -1259,6 +1259,7 @@ struct dwc3 {
> > > #define DWC31_REVISION_170A 0x3137302a
> > > #define DWC31_REVISION_180A 0x3138302a
> > > #define DWC31_REVISION_190A 0x3139302a
> > > +#define DWC31_REVISION_200A 0x3230302a
> >
> > What code uses this define?
> >
>
> Don't think there is anything within the DWC3 core that would be different
> specifically for 2.00a versus previous revisions. (so far)
>
> > Why add a define that is not used?
> >
>
> There is a running list of all the DWC3 revisions. Not all of them are
> being used, so my understanding was that we're just keeping track of all
> possible version values that can be read from the DWC3 version HW register.
> If this is the not the case, maybe we can just leave this out until we find
> a need to add it.
>
Greg already picked this up, so it's fine. But I would prefer to only
define new macros when they are needed. There are a lot of versions and
configurations we don't list in dwc3.
Thanks,
Thinh
