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From: "Alexander Ivanov" <amivanov@fastmail.com>
To: "Andy Shevchenko" <andriy.shevchenko@linux.intel.com>
Cc: "Linus Walleij" <linus.walleij@linaro.org>,
	"Valdis Klētnieks" <valdis.kletnieks@vt.edu>,
	"Bjørn Mork" <bjorn@mork.no>, "Jean Delvare" <jdelvare@suse.de>,
	kernelnewbies@kernelnewbies.org
Subject: Re: GPIO Driver for Skylake-Y PCH
Date: Thu, 20 Jun 2019 14:02:11 -0700
Message-ID: <fda9c935-47ff-4607-b9dd-941f95c220b0@www.fastmail.com> (raw)
In-Reply-To: <20190618084034.GI9224@smile.fi.intel.com>


On Tue, 18 Jun 2019 01:41 -07:00, Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:
> > 
> > Obviously, I am wrong here. However, the question stands, is there linux kernel support for Intel PCH GPIO?
> 
> 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.
> 

My box is updated with current Fedora distro and now running 5.0.9-301.fc30.x86_64. It's also said that the box has Sunrisepoint chipset. For this chipset, 5.0.9 kernel support following devices:

static const struct acpi_device_id spt_pinctrl_acpi_match[] = {
	{ "INT344B", (kernel_ulong_t)&sptlp_soc_data },
	{ "INT345D", (kernel_ulong_t)&spth_soc_data },
	{ }
};

[ https://elixir.bootlin.com/linux/v5.0.9/source/drivers/pinctrl/intel/pinctrl-sunrisepoint.c#L587 ]

I believe the box has INT344B device attached to acpi bus proper:

$ sudo ls -la /sys/bus/acpi/devices/INT344*
...
lrwxrwxrwx. 1 root root 0 Jun 20 11:47 /sys/bus/acpi/devices/INT344B:00 -> ../../../devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/INT344B:00


Drivers seem loaded:

$ lsmod | grep pin
pinctrl_sunrisepoint    28672  0
pinctrl_intel          28672  1 pinctrl_sunrisepoint

However, I don't see any gpio devices.

$ ls /dev/gpio*
ls: cannot access '/dev/gpio*': No such file or directory
$ ls /sys/bus/gpio/devices/
$

What am I still missing?


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Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-14 17:58 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
2019-06-18 16:17                       ` Alexander Ivanov
2019-06-20 21:02                   ` Alexander Ivanov [this message]
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
2019-06-14 19:12   ` Bjørn Mork

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