On Thu, Feb 27, 2025 at 09:55:29AM -0600, Bjorn Andersson wrote:
> On Thu, Feb 27, 2025 at 06:24:17AM +0200, Dmitry Baryshkov wrote:
> > On Wed, Feb 26, 2025 at 04:17:50PM -0800, Bjorn Andersson wrote:
> > > When the core is integrated with glue, it's reasonable to assume that
> > > the glue driver will have to touch the IP before/after the core takes
> > > the hardware out and into reset. As such the glue must own these
> > > resources and be allowed to turn them on/off outside the core's
> > > handling.
> > >
> > > Allow the platform or glue layer to indicate if the core logic for
> > > clocks and resets should be skipped to deal with this.
> > >
> > > Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxxxx>
> > > ---
> > > drivers/usb/dwc3/core.c | 19 +++++++++++--------
> > > drivers/usb/dwc3/glue.h | 1 +
> > > 2 files changed, 12 insertions(+), 8 deletions(-)
> > >
> > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> > > index d9f0a6782d36..aecdde8dc999 100644
> > > --- a/drivers/usb/dwc3/core.c
> > > +++ b/drivers/usb/dwc3/core.c
> > > @@ -2328,6 +2330,7 @@ static int dwc3_probe(struct platform_device *pdev)
> > >
> > > probe_data.dwc = dwc;
> > > probe_data.res = res;
> > > + probe_data.ignore_clocks_and_resets = false;
> >
> > Isn't it a default value?
> >
>
> I like the false because it's explicit, but I have no strong attachment
> to it.
I'm more biased to the 'make unusal cases stand out', which means the
defaults can go away to highlight non-default cases.
>
> That said, it's not the default value, because probe_data isn't
> zero-initialized. That would however make sense to do, in order to avoid
> surprises in the future when probe_data grows.
:-)
>
> Regards,
> Bjorn
>
> > >
> > > return dwc3_core_probe(&probe_data);
> > > }
> > > diff --git a/drivers/usb/dwc3/glue.h b/drivers/usb/dwc3/glue.h
> > > index e73cfc466012..1ddb451bdbd0 100644
> > > --- a/drivers/usb/dwc3/glue.h
> > > +++ b/drivers/usb/dwc3/glue.h
> > > @@ -17,6 +17,7 @@
> > > struct dwc3_probe_data {
> > > struct dwc3 *dwc;
> > > struct resource *res;
> > > + bool ignore_clocks_and_resets;
> > > };
> > >
> > > int dwc3_core_probe(const struct dwc3_probe_data *data);
> > >
> > > --
> > > 2.45.2
> > >
> >
> > --
> > With best wishes
> > Dmitry
--
With best wishes
Dmitry
