Re: [PATCH 08/14] mfd: remove unused aat2870 driver

["Nuno Sá" <nuno.sa@analog.com>]

On Tue, Nov 10, 2026 at 05:12:28PM +0100, Arnd Bergmann wrote:
> On Tue, Nov 10, 2026, at 16:39, Nuno Sá wrote:
> > On Sat, Sep 12, 2026 at 11:20:47PM +0100, Jonathan Cameron wrote:
> >> On Thu, 10 Sep 2026 20:14:15 +0200 "Arnd Bergmann" <arnd@arndb.de> wrote:
> 
> >> > drivers/iio/adc/ad7793.c
> >> Maybe. Analog devices ack needed.
> >> 
> >> Production part but this one indeed fails to probe.  Analog
> >> folk, do you want to fix this one up?
> >
> > Given it's production we should fix. Looking at platdata seems to nicely
> > fir in DT. Issue is that I don't have HW with me to test. So I'll maybe
> > just remove platdata and assume some defaults.
> 
> Sounds good. I already dropped my removal patch for this one.
> 
> >> > drivers/iio/frequency/ad9523.c
> >> Maybe. Analog Devices ack needed.
> >> 
> >
> > Hmm we definitely use this one and we have OF support out of tree with
> > likely some DT abuse of what can be in DT or not. Not sure if I have
> > some HW around but we'll need to fix it.
> >
> > In general for ADI parts, I think we can drop the ones that are not
> > recommended for new designs. All the others I tempted to say we should
> > keep. Naturally we need to fix all the drivers that do not compile
> > without platdata. And for the ones with defaults we can also just remove
> > platdata and use the plain defaults.
> 
> Ok, I'll leave it alone as well now.
> 
> I currently still have patches to remove adp8860/8870 (backlight), ad7877
> (touchscreen), ad714x (touch) and adxl34x (input, not the iio one), which
> are currently unusable with DT but are all listed as in production.
> 
> I assume you want to fix all of these and keep them in the kernel,
> but possibly still remove the adxl34x and only keep the IIO driver for
> that part?

Yes. And yes, seems to me the input driver has not reason to be in tree.
The IIO should be the one to use.

> 
> I also have patches to remove platform_data probing from ad5761, adf4350,
> ad5791, ad5421 and ad5504, these all have DT support.
> 
> See 
> https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=board-remove-7.4
> for the updated series. I hope to slowly get through that. Let
> me know if you want me to skip any more of those patches.

Thanks for taking care of this. Let me know if you need any help with
ADI related parts.

- Nuno Sá

> 
> Thanks,
> 
>     Arnd