Implement poweroff and reboot support for the SC2730 PMIC in the
existing driver for the SC27xx series. Add missing device tree bindings
and compatibles.

For some reason, a reboot implementation for SC2731 already exists in
the SPI driver used for communicating with the PMIC
(drivers/spi/spi-sprd-adi.c). This obviously does not belong there, but
it appears that SC2731 has no dedicated reboot registers and requires
triggering the PMIC watchdog for a reboot. Since there is no driver for
the PMIC watchdog yet, keep that code unmodified and only implement
reboot for SC2730 here. Once a watchdog driver is implemented, the
duplicate code for setting the reboot mode can be removed from the SPI
driver.

Signed-off-by: Otto Pflüger <otto.pflueger@abscue.de>
---
Otto Pflüger (5):
      dt-bindings: power: reset: Add SC27xx series PMIC poweroff
      dt-bindings: mfd: sc2731: Reference sprd,sc2731-poweroff
      power: reset: sc27xx: Use devm_register_sys_off_handler
      power: reset: sc27xx: Add support for SC2730 and OF match table
      power: reset: sc27xx: Add reboot support for SC2730

 .../devicetree/bindings/mfd/sprd,sc2731.yaml       |   8 +
 .../bindings/power/reset/sprd,sc2731-poweroff.yaml |  22 +++
 drivers/power/reset/sc27xx-poweroff.c              | 170 +++++++++++++++++++--
 3 files changed, 188 insertions(+), 12 deletions(-)
---
base-commit: 8e2755d7779a95dd61d8997ebce33ff8b1efd3fb
change-id: 20250926-sc2730-reboot-7f39a025547d

Best regards,
-- 
Otto Pflüger <otto.pflueger@abscue.de>