[PATCH v2 0/2] mfd: ucb1x00: Convert Assabet gpio-keys to software nodes

[Dmitry Torokhov]

This patch series converts the legacy gpio-keys platform device on the
StrongARM SA-1100 Assabet evaluation board from platform data to software
nodes and device properties.

The first patch registers a shared software node for the UCB1x00 GPIO
controller in drivers/mfd/ucb1x00-core.c, attaching its firmware node
directly to the GPIO chip prior to registration. The second patch
converts the Assabet machine subdriver to define dynamically allocated
software nodes referencing the UCB1x00 GPIO controller directly, allowing
pin bindings to be resolved via the attached firmware node without relying
on name matching.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
Changes in v2:
- Export ucb1x00_gpiochip_node to fix link errors when built as module.
- Fix teardown order in core driver to avoid software node use-after-free.
- Convert Assabet subdriver to use dynamically allocated software nodes
  to avoid use-after-free on module unload.
- Factor out button node removal logic into a helper.
- Link to v1: https://patch.msgid.link/20260706-ucb1x00-assabet-swnode-v1-0-6102eabd31d0@xxxxxxxxx

---
Dmitry Torokhov (2):
      mfd: ucb1x00: Register software node for GPIO controller
      mfd: ucb1x00: Convert Assabet gpio-keys to use software nodes

 drivers/mfd/ucb1x00-assabet.c | 124 +++++++++++++++++++++++++++++++++---------
 drivers/mfd/ucb1x00-core.c    |  16 +++++-
 include/linux/mfd/ucb1x00.h   |   3 +
 3 files changed, 116 insertions(+), 27 deletions(-)
---
base-commit: 8e9685d3c41c35dd1b37df70d854137abcb2fbac
change-id: 20260705-ucb1x00-assabet-swnode-683cb383d398

Thanks.

-- 
Dmitry