This converts Nokia 770 to using real firmware node lookup for GPIOs by
attaching the software nodes describing GPIO controllers to their target
devices.

As determined by Aaro's testing, both omap16xx_gpio_init() and
software_node_init() run in postcore_initcall() so we need to make
software nodes available earlier hence the new patches in v4.

Please note that while the goal of this series is to allow Nokia 770 to
use software nodes earlier, we're not modifying core kernel code just to
accomodate an old ARM platform - more such conversions are coming up so
the change will be useful to more consumers of the software node API.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
Changes in v4:
- Add patches making software nodes available earlier
- Remove stray newline
- Link to v3: https://lore.kernel.org/all/20260212112508.73500-1-bartosz.golaszewski@oss.qualcomm.com/

Changes in v3:
- fix references to the MPU node

Changes in v2:
- fix build with CONFIG_I2C_CBUS_GPIO
- only export the two symbols that are actually required by the nokia
  board file

---
Bartosz Golaszewski (3):
      kernel: ksysfs: initialize kernel_kobj earlier
      driver core: make software nodes available earlier
      ARM: omap1: enable real software node lookup of GPIOs on Nokia 770

 arch/arm/mach-omap1/board-nokia770.c | 30 +++++-------------------------
 arch/arm/mach-omap1/common.h         |  3 +++
 arch/arm/mach-omap1/gpio16xx.c       | 28 +++++++++++++++++++++++++++-
 drivers/base/base.h                  |  1 +
 drivers/base/init.c                  |  1 +
 drivers/base/swnode.c                | 13 ++-----------
 include/linux/kobject.h              |  2 ++
 init/main.c                          |  1 +
 kernel/ksysfs.c                      |  8 +++-----
 9 files changed, 45 insertions(+), 42 deletions(-)
---
base-commit: e80f5dcc54bf5d494b725e2932571488daac33b8
change-id: 20260330-nokia770-gpio-swnodes-5da8ba35946e

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

On Mon Mar 30, 2026 at 2:40 PM CEST, Bartosz Golaszewski wrote:
> Bartosz Golaszewski (3):
>       kernel: ksysfs: initialize kernel_kobj earlier
>       driver core: make software nodes available earlier
>       ARM: omap1: enable real software node lookup of GPIOs on Nokia 770

Looks good to me overall (one minor nit in the first patch); which tree should
this go through?

On Mon, Mar 30, 2026 at 3:37 PM Danilo Krummrich <dakr@kernel.org> wrote:
>
> On Mon Mar 30, 2026 at 2:40 PM CEST, Bartosz Golaszewski wrote:
> > Bartosz Golaszewski (3):
> >       kernel: ksysfs: initialize kernel_kobj earlier
> >       driver core: make software nodes available earlier
> >       ARM: omap1: enable real software node lookup of GPIOs on Nokia 770
>
> Looks good to me overall (one minor nit in the first patch); which tree should
> this go through?

If the first two patches can make v7.1 then I'm fine with postponing
patch 3 until v7.2. Maybe Dmitry's changes allowing passing
unregistered software nodes to new platform devices (where are we with
this?) would also make it in and patch 3/3 could be smaller as a
result.

Bart

On Mon, Mar 30, 2026 at 3:52 PM Bartosz Golaszewski <brgl@kernel.org> wrote:
>
> On Mon, Mar 30, 2026 at 3:37 PM Danilo Krummrich <dakr@kernel.org> wrote:
> >
> > On Mon Mar 30, 2026 at 2:40 PM CEST, Bartosz Golaszewski wrote:
> > > Bartosz Golaszewski (3):
> > >       kernel: ksysfs: initialize kernel_kobj earlier
> > >       driver core: make software nodes available earlier
> > >       ARM: omap1: enable real software node lookup of GPIOs on Nokia 770
> >
> > Looks good to me overall (one minor nit in the first patch); which tree should
> > this go through?
>
> If the first two patches can make v7.1 then I'm fine with postponing
> patch 3 until v7.2. Maybe Dmitry's changes allowing passing
> unregistered software nodes to new platform devices (where are we with
> this?) would also make it in and patch 3/3 could be smaller as a
> result.
>

In other words: patches 1 and 2 can go though the driver core tree
into v7.1 and patch 3/3 will be respun next cycle.

Bart