Re: [PATCH] gpio: pca953x: add support for open drain pins on PCAL6524

[Andy Shevchenko <andy.shevchenko@gmail.com>]

On Tue, Feb 2, 2021 at 1:45 PM Bartosz Golaszewski
<bgolaszewski@baylibre.com> wrote:
> On Thu, Jan 28, 2021 at 4:36 PM Alban Bedel <alban.bedel@aerq.com> wrote:
> >
> > From a quick glance at various datasheet the PCAL6524 seems to be the

Oh, even more typos

datasheets

> > only chip in this familly that support setting the drive mode of

supports

> > single pins. Other chips either don't support it at all, or can only
> > set the drive mode of whole banks, which doesn't map to the GPIO API.
> >
> > Add a new flag, PCAL6524, to mark chips that have the extra registers
> > needed for this feature. Then mark the needed register banks as
> > readable and writable, here we don't set OUT_CONF as writable,
> > although it is, as we only need to read it. Finally add a function
> > that configure the OUT_INDCONF register when the GPIO API set the
> > drive mode of the pins.

...

> Maybe call it PCAL6524_TYPE for consistency with the ones below?

In case you continue modifying this driver, I agree with Bart on
PCAL6524_TYPE along with new OF_6524() macro.

-- 
With Best Regards,
Andy Shevchenko