[PATCH v7 0/2] Introduce Synology Microp driver

[Markus Probst via B4 Relay <devnull+markus.probst.posteo.de@kernel.org>]

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/20260329-rust_leds-v13-0-21a599c5b2d1@posteo.de/
[2] https://lore.kernel.org/rust-for-linux/20260411-rust_serdev-v4-0-845e960c6627@posteo.de/

Signed-off-by: Markus Probst <markus.probst@posteo.de>
---
Changes in v7:
- remove list of compatible ids from commit msg
- explain what makes the different models not compatible in the commit msg
- remove unnecessary examples
- Link to v6: https://lore.kernel.org/r/20260405-synology_microp_initial-v6-0-08fde474b6c9@posteo.de

Changes in v6:
- moved devicetree bindings patch at the end of the set
- remove several patches
- move of id table from model.rs to synology_microp.rs
- remove the model! macro
- use if blocks in devicetree schema to narrow down the
  fan-failure-gpios property
- add multiple devicetree examples to test if blocks
- Link to v5: https://lore.kernel.org/r/20260329-synology_microp_initial-v5-0-27cb80bdf591@posteo.de

Changes in v5:
- add esata led support
- use different compatible for each model
- add visibility modifier to of_device_table macro
- fix match data missing when using PRP0001
- Link to v4: https://lore.kernel.org/r/20260320-synology_microp_initial-v4-0-0423ddb83ca4@posteo.de

Changes in v4:
- convert to monolithic driver and moved it into drivers/platform
- removed mfd rust abstraction
- moved dt-bindings to embedded-controller
- Link to v3: https://lore.kernel.org/r/20260313-synology_microp_initial-v3-0-ad6ac463a201@posteo.de

Changes in v3:
- remove `default n` from Kconfig entry, as n is the default already.
- select RUST_SERIAL_DEV_BUS_ABSTRACTIONS in Kconfig
- add mfd rust abstraction
- split core and led parts into their own driver. It should now be considered a
  MFD device.
- split led part of dt binding into its own file
- Link to v2: https://lore.kernel.org/r/20260308-synology_microp_initial-v2-0-9389963f31c5@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):
      platform: Add initial synology microp driver
      dt-bindings: embedded-controller: Add synology microp devices

 .../synology,ds923p-microp.yaml                    |  92 +++++++
 MAINTAINERS                                        |   6 +
 drivers/platform/Kconfig                           |   2 +
 drivers/platform/Makefile                          |   1 +
 drivers/platform/synology_microp/Kconfig           |  13 +
 drivers/platform/synology_microp/Makefile          |   3 +
 drivers/platform/synology_microp/TODO              |   7 +
 drivers/platform/synology_microp/command.rs        |  55 ++++
 drivers/platform/synology_microp/led.rs            | 276 +++++++++++++++++++++
 drivers/platform/synology_microp/model.rs          |  49 ++++
 .../platform/synology_microp/synology_microp.rs    | 109 ++++++++
 11 files changed, 613 insertions(+)
---
base-commit: 0e5d0a0b5ca6ea4e391d6786266405c5871e0151
change-id: 20260306-synology_microp_initial-0f7dac7b7496
prerequisite-change-id: 20251217-rust_serdev-ee5481e9085c:v4
prerequisite-patch-id: 52b17274481cc770c257d8f95335293eca32a2c5
prerequisite-patch-id: eec47e5051640d08bcd34a9670b98804449cad52
prerequisite-patch-id: f24b68c71c3f69371e8ac0251efca0a023b31cc4
prerequisite-patch-id: d0686cf451ef899a06d468adfba51ccd84e6ff98
prerequisite-change-id: 20251114-rust_leds-a959f7c2f7f9:v13
prerequisite-patch-id: 818700f22dcb9676157c985f82762d7c607b861e
prerequisite-patch-id: b15ffa7d95d9260151bfb116b259c4473f721c82
prerequisite-patch-id: 8c47e0d107530f577a1be0b79f8ee791f95d3cbe