[v2,0/1] SCMI SystemPower Control driver

Message

Cristian Marussi Oct. 26, 2020, 8:55 p.m. UTC

Hi all,

This patch, building on top of the recently introduced SCMI System Power
Protocol support, adds a new SCMI driver which, registering for SCMI System
Power notifications, acts accordingly to satisfy such SCMI plaform
system-wide transition requests (which can be of forceful or graceful kind)

In order to comply with graceful requests, and co-operate with userspace
entities to drive a clean shutdown/reboot, the logic of the driver relies
on the same orderly_* API methods used by ACPI when handling ACPI Shutdown
bus events.
As an alternative method to tunnel graceful requests to userspace, though,
it is possible to configure, via module parameters, a specific signal to be
sent to CAD pid.

It is currently based on for-next/scmi [1] on top of:

commit b9ceca6be432 ("firmware: arm_scmi: Fix duplicate workqueue name")

Thanks,

Cristian

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git/log/?h=for-next/scmi


Cristian Marussi (1):
  firmware: arm_scmi: Add SCMI System Power Control driver

 drivers/firmware/Kconfig                      |  12 +
 drivers/firmware/arm_scmi/Makefile            |   1 +
 .../firmware/arm_scmi/scmi_power_control.c    | 387 ++++++++++++++++++
 3 files changed, 400 insertions(+)
 create mode 100644 drivers/firmware/arm_scmi/scmi_power_control.c