From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
Cc: Kent Gibson <warthog618@gmail.com>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: using libgpiod to replace sysfs ABI (was Re: [PATCH] gpiolib: Avoid side effects in gpio_is_visible())
Date: Thu, 25 May 2023 12:13:11 +0300 [thread overview]
Message-ID: <CAHp75VfVr0N4Fv=s_12vcTi8=pGWJgeWoXpxQvqSNWDcZauS=A@mail.gmail.com> (raw)
In-Reply-To: <f9006a57-4c67-c8a0-badc-84b3292aa686@alliedtelesis.co.nz>
On Thu, May 25, 2023 at 2:53 AM Chris Packham
<Chris.Packham@alliedtelesis.co.nz> wrote:
> On 24/05/23 17:41, Kent Gibson wrote:
...
> It'd also be great if there was some way of ensuring that a line's state
> is kept after the application has released the request (i.e. the txdis
> case I mentioned). But that probably needs work on the kernel side to
> make such guarantees.
Won't happen. It will require too much of strictness to be added into
the kernel with likely breakage of the existing code and
documentation. What is being discussed is a D-Bus (like?) daemon +
Policy in user space that will allow user / process / cgroup / etc to
"own" the line and track its state.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2023-05-25 9:13 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-12 4:28 [PATCH] gpiolib: Avoid side effects in gpio_is_visible() Chris Packham
2023-05-12 7:24 ` Johan Hovold
2023-05-14 21:57 ` Chris Packham
2023-05-15 6:43 ` andy.shevchenko
2023-05-15 21:01 ` Chris Packham
2023-05-12 7:56 ` Linus Walleij
2023-05-14 22:27 ` Chris Packham
2023-05-16 13:57 ` Linus Walleij
2023-05-16 22:19 ` Chris Packham
2023-05-16 22:47 ` Kent Gibson
2023-05-16 23:50 ` Chris Packham
2023-05-17 0:47 ` Kent Gibson
2023-05-17 1:05 ` Kent Gibson
2023-05-17 1:07 ` Chris Packham
2023-05-17 1:21 ` Kent Gibson
2023-05-17 8:54 ` Andy Shevchenko
2023-05-17 9:10 ` Kent Gibson
2023-05-17 21:30 ` Chris Packham
2023-05-23 16:38 ` andy.shevchenko
2023-05-23 21:17 ` Chris Packham
2023-05-24 5:41 ` Kent Gibson
2023-05-24 23:53 ` using libgpiod to replace sysfs ABI (was Re: [PATCH] gpiolib: Avoid side effects in gpio_is_visible()) Chris Packham
2023-05-25 1:19 ` Kent Gibson
2023-05-25 9:13 ` Andy Shevchenko [this message]
2023-05-25 14:35 ` Bartosz Golaszewski
2023-05-26 12:46 ` [PATCH] gpiolib: Avoid side effects in gpio_is_visible() Bartosz Golaszewski
2023-05-28 21:04 ` Chris Packham
2023-05-29 9:19 ` Linus Walleij
2023-05-29 15:07 ` Andrew Lunn
2023-05-29 9:07 ` Linus Walleij
2023-05-29 22:00 ` Chris Packham
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