Re: [PATCH v1 05/16] pinctrl: cy8c95x0: Remove incorrectly set fields in regmap configuration

[Andy Shevchenko]

On Fri, Jan 17, 2025 at 05:15:06PM +0200, Andy Shevchenko wrote:
> On Fri, Jan 17, 2025 at 05:13:36PM +0200, Andy Shevchenko wrote:
> > On Fri, Jan 17, 2025 at 04:01:43PM +0100, Patrick Rudolph wrote:
> > > On Fri, Jan 17, 2025 at 3:23 PM Andy Shevchenko
> > > <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> > > >
> > > > We don't provide defaults for the regmap, we shouldn't provide
> > > > the number of them either.
> > > The intention is to read back the defaults from HW to initialize the
> > > regmap cache.
> > > The defaults are applied at each POR from the device's internal EEPROM.
> > > See regcache_hw_init() for details.
> > 
> > Yes, I was looking a lot and that code and it doesn't work as intended.
> > I can reproduce the issue, but it's real issue and I don't think we need
> > to read back anything from the HW forcibly. It will be done naturally, no?
> 
> I think I now remember, it has a NULL pointer dereference.

FWIW, okay, it was induced by a fix in regmap core, so this NULL pointer
dereference is for real, but it's a regression in the regmap core.

For the reference read this thread:
20250116124303.3941583-1-andriy.shevchenko@xxxxxxxxxxxxxxx.

-- 
With Best Regards,
Andy Shevchenko