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From: Andy Shevchenko <>
To: Bartosz Golaszewski <>
Cc: Alban Bedel <>,
	Linus Walleij <>,
	linux-gpio <>,
	LKML <>
Subject: Re: [PATCH] gpio: pca953x: add support for open drain pins on PCAL6524
Date: Wed, 3 Feb 2021 12:12:52 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

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

Oh, even more typos


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


> > 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

  parent reply	other threads:[~2021-02-03 10:13 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-28 15:36 [PATCH] gpio: pca953x: add support for open drain pins on PCAL6524 Alban Bedel
2021-02-02 11:42 ` Bartosz Golaszewski
2021-02-02 17:45   ` Bedel, Alban
2021-02-03 10:12   ` Andy Shevchenko [this message]
2021-02-02 13:57 ` Linus Walleij
2021-02-02 17:45   ` Bedel, Alban
2021-02-02 19:21     ` Linus Walleij
2021-02-03 10:10 ` Andy Shevchenko

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