From: Bartosz Golaszewski <brgl@kernel.org>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Bartosz Golaszewski" <bartosz.golaszewski@oss.qualcomm.com>,
"Daniel Scally" <djrscally@gmail.com>,
"Heikki Krogerus" <heikki.krogerus@linux.intel.com>,
"Sakari Ailus" <sakari.ailus@linux.intel.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Danilo Krummrich" <dakr@kernel.org>,
"Mika Westerberg" <mika.westerberg@linux.intel.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Linus Walleij" <linusw@kernel.org>,
"Hans de Goede" <hansg@kernel.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Dmitry Torokhov" <dmitry.torokhov@gmail.com>,
"Len Brown" <lenb@kernel.org>,
linux-acpi@vger.kernel.org, driver-core@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH v2 0/4] platform/x86: x86-android-tablets: use real firmware node references with intel drivers
Date: Thu, 2 Apr 2026 17:03:10 +0200 [thread overview]
Message-ID: <CAMRc=McJFNp15jnrehGLHsmFRfBpRQoppmdB_51whzJUQ-5ZLw@mail.gmail.com> (raw)
In-Reply-To: <ac5zhZAyiwbUwzWo@ashevche-desk.local>
On Thu, Apr 2, 2026 at 3:47 PM Andy Shevchenko
<andriy.shevchenko@linux.intel.com> wrote:
>
> On Thu, Apr 02, 2026 at 03:35:24PM +0200, Bartosz Golaszewski wrote:
> > On Thu, Apr 2, 2026 at 3:23 PM Andy Shevchenko
> > <andriy.shevchenko@linux.intel.com> wrote:
> > >
> > > > 3. Export the acpi_bus_type symbol. It's already available in the
> > > > acpi_bus.h header but it's not available to loadable modules.
> > >
> > > Nowadays we don't do that but export the dev_is_acpi() or something similar if
> > > it's not yet available and to_acpi_dev(). (Names are derived from the existing
> > > pattern, they might be need to be adjusted, dunno.) See how PNP does that.
> > > Note, I haven't read the patches yet, just a quick comment.
> >
> > Maybe I should have said why I do it. It's to register a notifier call
> > on ACPI bus events. Is there a better way to do this?
>
> AFAIU there shouldn't be pure ACPI devices, they are companions to the real
> ones. Can we simply attach to the normal device notifier and check if the
> companion is what we are looking for? Also since it's specific to that driver
> and you know what the platforms you are looking for, why can't we hook
> something into drivers/acpi/x86/lpss.c?
>
The ACPI companions seem to only ever be added once and never removed
- unlike platform devices. This is why I prefer to check the ACPI bus.
As for lpss.c - what do you sugest exactly because at first glance I'm
not quite sure what's there to hook up?
Bart
next prev parent reply other threads:[~2026-04-02 15:03 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-02 12:54 [PATCH v2 0/4] platform/x86: x86-android-tablets: use real firmware node references with intel drivers Bartosz Golaszewski
2026-04-02 12:54 ` [PATCH v2 1/4] software node: return -ENXIO when referenced swnode is not registered yet Bartosz Golaszewski
2026-04-02 13:35 ` Andy Shevchenko
2026-04-02 20:43 ` Dmitry Torokhov
2026-04-03 7:29 ` Bartosz Golaszewski
2026-04-03 18:07 ` Dmitry Torokhov
2026-04-07 10:57 ` Bartosz Golaszewski
2026-04-07 13:30 ` Bartosz Golaszewski
2026-04-07 13:59 ` Andy Shevchenko
2026-04-02 12:54 ` [PATCH v2 2/4] gpio: swnode: defer probe on references to unregistered software nodes Bartosz Golaszewski
2026-04-02 21:04 ` Dmitry Torokhov
2026-04-03 7:26 ` Bartosz Golaszewski
2026-04-03 13:44 ` Bartosz Golaszewski
2026-04-02 12:54 ` [PATCH v2 3/4] ACPI: bus: export the acpi_bus_type symbol Bartosz Golaszewski
2026-04-02 12:54 ` [PATCH v2 4/4] platform/x86: x86-android-tablets: enable fwnode matching of GPIO chips Bartosz Golaszewski
2026-04-04 18:25 ` Rafael J. Wysocki
2026-04-27 11:30 ` Bartosz Golaszewski
2026-04-02 13:23 ` [PATCH v2 0/4] platform/x86: x86-android-tablets: use real firmware node references with intel drivers Andy Shevchenko
2026-04-02 13:35 ` Bartosz Golaszewski
2026-04-02 13:47 ` Andy Shevchenko
2026-04-02 15:03 ` Bartosz Golaszewski [this message]
2026-04-02 16:05 ` Andy Shevchenko
2026-04-02 16:13 ` Bartosz Golaszewski
2026-04-02 16:18 ` Andy Shevchenko
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