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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: "Valdis Klētnieks" <valdis.kletnieks@vt.edu>
Cc: Linus Walleij <linus.walleij@linaro.org>,
	Alexander Ivanov <amivanov@fastmail.com>,
	Jean Delvare <jdelvare@suse.de>, Bj?rn Mork <bjorn@mork.no>,
	kernelnewbies@kernelnewbies.org
Subject: Re: GPIO Driver for Skylake-Y PCH
Date: Tue, 18 Jun 2019 18:57:37 +0300	[thread overview]
Message-ID: <20190618155737.GU9224@smile.fi.intel.com> (raw)
In-Reply-To: <11636.1560869325@turing-police>

On Tue, Jun 18, 2019 at 10:48:45AM -0400, Valdis Klētnieks wrote:
> On Tue, 18 Jun 2019 11:40:34 +0300, Andy Shevchenko said:
> 
> > Yes. Most of the SoCs from Intel use GPIO IP based on Chassis specification,
> > the drivers for which are available under drivers/pinctrl/intel. What you are
> > looking for is located under PINCTRL_SUNRISEPOINT configuration option.
> 
> Thanks for the info, it's often unclear where to look - when the hardware has
> a PCH and documentation that says it has GPIO, and there's an in-tree driver
> called gpio_pch, it's easy to fail to look in the right place :)

Citing in-kernel documentation:

--- 8< --- 8< ---- 8< ---

Electrical properties of the pin such as biasing and drive strength
may be placed at some pin-specific register in all cases or as part
of the GPIO register in case (B) especially. This doesn't mean that such
properties necessarily pertain to what the Linux kernel calls "GPIO".

-- 
With Best Regards,
Andy Shevchenko



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  reply	other threads:[~2019-06-18 15:58 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-14 17:58 GPIO Driver for Skylake-Y PCH Alexander Ivanov
2019-06-14 18:46 ` Valdis Klētnieks
2019-06-14 19:01   ` Alexander Ivanov
2019-06-14 19:09     ` Valdis Klētnieks
2019-06-14 20:25       ` Alexander Ivanov
2019-06-14 22:40         ` Alexander Ivanov
2019-06-15  8:53           ` Bjørn Mork
2019-06-15 19:30           ` Valdis Klētnieks
2019-06-15 19:38             ` Alexander Ivanov
2019-06-15 19:56               ` Greg KH
2019-06-16  1:50               ` Valdis Klētnieks
2019-06-16  2:45                 ` Alexander Ivanov
2019-06-16  8:54                   ` Bjørn Mork
2019-06-17  8:06             ` Andy Shevchenko
2019-06-18  0:00               ` Alexander Ivanov
2019-06-18  8:40                 ` Andy Shevchenko
2019-06-18 14:48                   ` Valdis Klētnieks
2019-06-18 15:57                     ` Andy Shevchenko [this message]
2019-06-18 16:17                       ` Alexander Ivanov
2019-06-20 21:02                   ` Alexander Ivanov
2019-06-21 10:12                     ` Andy Shevchenko
2019-06-21 17:39                       ` Alexander Ivanov
2019-06-24 18:39                         ` Alexander Ivanov
2019-06-25 11:08                           ` Andy Shevchenko
2019-06-25 14:10                             ` Linus Walleij
2019-07-10 16:04                               ` Andy Shevchenko
2019-08-28 21:04                             ` Alexander Ivanov
2019-08-29  7:47                               ` Valentin Vidić
2019-08-29 10:49                                 ` Andy Shevchenko
2019-08-29 11:49                                   ` Valentin Vidić
2019-08-29 14:59                                     ` Andy Shevchenko
2019-08-29 17:17                                       ` Valentin Vidić
2019-08-29 15:59                                 ` Alexander Ivanov
2019-06-14 19:12   ` Bjørn Mork

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