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From: Andy Shevchenko <>
To: Alban Bedel <>
Cc: Linus Walleij <>,
	Bartosz Golaszewski <>,
	"open list:GPIO SUBSYSTEM" <>,
	Linux Kernel Mailing List <>
Subject: Re: [PATCH] gpio: pca953x: add support for open drain pins on PCAL6524
Date: Wed, 3 Feb 2021 12:10:01 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, Jan 28, 2021 at 5:38 PM Alban Bedel <> wrote:
> From a quick glance at various datasheet the PCAL6524 seems to be the
> 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.

Can we actually convert the driver to be a pin control for the starter?
Or split it for some chips to be a pin control, while the rest keeps
just being GPIO.
I would like to avoid more complex changes in it until it's properly
converted to the pin control.

With Best Regards,
Andy Shevchenko

      parent reply	other threads:[~2021-02-03 10:11 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
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 [this message]

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