Platform device core provides helper interfaces for dealing with
dynamically created platform devices. Most users should use
platform_device_register_full() which encapsulates most of the
operations but some modules will want to use the split approach of
calling platform_device_alloc() + platform_device_add() separately for
various reasons.

With many platform devices now using dynamic software nodes as their
primary firmware nodes and with the platform device interface being
extended to also better cover the use-cases of secondary software nodes,
I believe it makes sense to switch to counting the references of all
kinds of firmware nodes.

To that end, I identified all users of platform_device_alloc() that also
assign dev.of_node or dev.fwnode manually. I noticed five cases where
the references are not increased as they should (patches 1-5 fix these
users) and provided three new functions in platform_device.h that now
become the preferred interfaces for assigning firmware nodes to dynamic
platform devices (in line with platform_device_add_data(),
platform_device_add_resources(), etc.). The bulk of the patches in this
series are small driver conversions to port all users to going through
the new functions that now encapsulate the refcount logic. With that
done, the final patch seamlessly switches to counting the references of
all firmware node types.

This effort is prerequisite of removing platform_device_release_full()
and unifying the release path for dynamic platform devices using
unmanaged software nodes.

Merging strategy: The entire series should go through the driver core
tree, possibly with an immutable branch provided to solve any potential
conflicts though these are rather unlikely.

Signed-off-by: Bartosz Golaszewski <redacted>
---
Changes in v2:
- Rebased on top of v7.2-rc1, dropped applied patches, collected tags
- Link to v1: https://patch.msgid.link/20260521-pdev-fwnode-ref-v1-0-88c324a1b8d2@oss.qualcomm.com

---
Bartosz Golaszewski (19):
      powerpc/powermac: fix OF node refcount
      driver core: platform: provide platform_device_set_of_node()
      driver core: platform: provide platform_device_set_fwnode()
      driver core: platform: provide platform_device_set_of_node_from_dev()
      of: platform: use platform_device_set_of_node()
      powerpc/powermac: use platform_device_set_of_node()
      i2c: pxa-pci: use platform_device_set_of_node()
      iommu/fsl: use platform_device_set_of_node()
      net: bcmgenet: use platform_device_set_of_node()
      pmdomain: imx: use platform_device_set_of_node()
      mfd: tps6586: use platform_device_set_of_node()
      slimbus: qcom-ngd-ctrl: use platform_device_set_of_node()
      net: mv643xx: use platform_device_set_of_node()
      drm/xe/i2c: use platform_device_set_fwnode()
      platform/surface: gpe: use platform_device_set_fwnode()
      usb: chipidea: use platform_device_set_of_node_from_dev()
      usb: musb: use platform_device_set_of_node_from_dev()
      reset: rzg2l: use platform_device_set_of_node_from_dev()
      driver core: platform: count references to all kinds of firmware nodes

 arch/powerpc/platforms/powermac/low_i2c.c    |  2 +-
 drivers/base/platform.c                      | 56 ++++++++++++++++++++++++++--
 drivers/gpu/drm/xe/xe_i2c.c                  |  2 +-
 drivers/i2c/busses/i2c-pxa-pci.c             |  3 +-
 drivers/iommu/fsl_pamu.c                     |  7 ++--
 drivers/mfd/tps6586x.c                       |  2 +-
 drivers/net/ethernet/broadcom/genet/bcmmii.c | 10 +++--
 drivers/net/ethernet/marvell/mv643xx_eth.c   |  2 +-
 drivers/of/platform.c                        |  2 +-
 drivers/platform/surface/surface_gpe.c       |  2 +-
 drivers/pmdomain/imx/gpc.c                   |  3 +-
 drivers/reset/reset-rzg2l-usbphy-ctrl.c      |  2 +-
 drivers/slimbus/qcom-ngd-ctrl.c              |  2 +-
 drivers/usb/chipidea/core.c                  |  2 +-
 drivers/usb/musb/jz4740.c                    |  2 +-
 include/linux/platform_device.h              |  8 ++++
 16 files changed, 84 insertions(+), 23 deletions(-)
---
base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
change-id: 20260520-pdev-fwnode-ref-d867836971eb

Best regards,
-- 
Bartosz Golaszewski [off-list ref]