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 [thread overview]
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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next prev parent reply other threads:[~2019-06-20 21:01 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
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
2019-08-28 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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