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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Bartosz Golaszewski" <bgolaszewski@baylibre.com>,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Linus Walleij" <linus.walleij@linaro.org>,
	linux-gpio <linux-gpio@vger.kernel.org>,
	linux-pwm@vger.kernel.org,
	"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v6] gpio: pca953x: Add Maxim MAX7313 PWM support
Date: Tue, 30 Jun 2020 23:56:09 +0200	[thread overview]
Message-ID: <20200630235609.52611e41@xps13> (raw)
In-Reply-To: <CAHp75VcxQ-qK+RYmfULDx3cHQW9W8__-Gf8EFw7Hgqsz0oPkjA@mail.gmail.com>

Hello,

Andy Shevchenko <andy.shevchenko@gmail.com> wrote on Wed, 1 Jul 2020
00:27:31 +0300:

> On Tue, Jun 30, 2020 at 3:45 PM Uwe Kleine-König
> <u.kleine-koenig@pengutronix.de> wrote:
> > On Tue, Jun 30, 2020 at 11:13:31AM +0200, Bartosz Golaszewski wrote:
> > > I can't find anything in any of the previous threads. What was the
> > > reason to not go the MFD way here?
> >
> > MFD doesn't work because the different "modes" are not orthogonal. So
> > this is not a single device that provides several functions at the same
> > time that can be used in parallel.
> 
> Did I get this correctly that it's either *all* pins are GPIO or *all* are PWM?
> 
> Otherwise, it fits from my point of view.
> 

Sorry for not being clear in the first place : the choice between
pure GPIO and PWM is on a per output basis. As Uwe said, the two
"modes" are not orthogonal hence the MFD does not fit here IMHO.

Thanks,
Miquèl

  reply	other threads:[~2020-06-30 21:56 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-03 10:54 [PATCH v6] gpio: pca953x: Add Maxim MAX7313 PWM support Miquel Raynal
2020-05-03 19:20 ` Andy Shevchenko
2020-05-03 19:41   ` Uwe Kleine-König
2020-06-29 14:08 ` Miquel Raynal
2020-06-29 16:50   ` Andy Shevchenko
2020-06-29 19:50   ` Uwe Kleine-König
2020-06-30  6:58     ` Miquel Raynal
2020-06-30  9:08       ` Uwe Kleine-König
2020-06-30  9:13       ` Bartosz Golaszewski
2020-06-30 12:45         ` Uwe Kleine-König
2020-06-30 21:27           ` Andy Shevchenko
2020-06-30 21:56             ` Miquel Raynal [this message]
2020-07-03 14:53 ` Uwe Kleine-König
2020-07-04 11:23   ` Andy Shevchenko
2020-07-04 15:43     ` Uwe Kleine-König
2020-08-12 17:36   ` Miquel Raynal

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