Synology uses a microcontroller in their NAS devices connected to a
serial port to control certain LEDs, fan speeds, a beeper, to handle
proper shutdown and restart, buttons and fan failures.

This patch series depends on the rust led abstraction [1] and the rust
serdev abstraction [2].

This is only a initial version of the driver able to control LEDs.
The following rust abstractions would be required, to implement the
remaining features:
- hwmon (include/linux/hwmon.h)
- input (include/linux/input.h)
- sysoff handler + hardware protection shutdown (include/linux/reboot.h)

[1] https://lore.kernel.org/rust-for-linux/20260207-rust_leds-v12-0-fdb518417b75@posteo.de/
[2] https://lore.kernel.org/rust-for-linux/20260306-rust_serdev-v2-0-e9b23b42b255@posteo.de/

Signed-off-by: Markus Probst <markus.probst@posteo.de>
---
Changes in v2:
- fix missing tabs in MAINTAINERS file
- remove word binding from patch subject
- add missing signed-off-by
- add missing help entry in Kconfig
- add missing spdx license headers
- remove no-check{,-cpu}-fan properties from the dt-bindings and replace
  them with the check_fan module parameter
- use patternProperties for leds in dt-bindings
- license dt-binding as GPL-2.0-only OR BSD-2-Clause
- move driver from staging tree into mfd tree and mark it as work in
  progress inside Kconfig
- only register alert and usb led if fwnode is present
- Link to v1: https://lore.kernel.org/r/20260306-synology_microp_initial-v1-0-fcffede6448c@posteo.de

---
Markus Probst (2):
      dt-bindings: mfd: Add synology,microp device
      mfd: Add initial synology microp driver

 .../devicetree/bindings/mfd/synology,microp.yaml   |  49 ++++
 MAINTAINERS                                        |   6 +
 drivers/mfd/Kconfig                                |   2 +
 drivers/mfd/Makefile                               |   2 +
 drivers/mfd/synology_microp/Kconfig                |  14 ++
 drivers/mfd/synology_microp/Makefile               |   2 +
 drivers/mfd/synology_microp/TODO                   |   7 +
 drivers/mfd/synology_microp/command.rs             |  50 ++++
 drivers/mfd/synology_microp/led.rs                 | 275 +++++++++++++++++++++
 drivers/mfd/synology_microp/synology_microp.rs     |  82 ++++++
 rust/uapi/uapi_helper.h                            |   2 +
 11 files changed, 491 insertions(+)
---
base-commit: 9fad1d148df6f36105159c2503d0ecb1397bc89a
change-id: 20260306-synology_microp_initial-0f7dac7b7496
prerequisite-change-id: 20251217-rust_serdev-ee5481e9085c:v2
prerequisite-patch-id: 52b17274481cc770c257d8f95335293eca32a2c5
prerequisite-patch-id: 680c0509490833f416b17eb3b918bb829ce7b90f
prerequisite-patch-id: 37016d6c07f0da898be02bf30110e8c0a30025d2
prerequisite-patch-id: 3dfc1f7e5ecd3e0dd65d676aeb16f55260847b25
prerequisite-change-id: 20251114-rust_leds-a959f7c2f7f9:v12
prerequisite-patch-id: 42c445ef6981e3a3740dbaaf307f4b810042e46f
prerequisite-patch-id: 90c7b200cca722a592353885e21af069101c4e09
prerequisite-patch-id: c664a52faa3d47000d252eb7603c9c08382e868a