Hi all, this series wants to add the core SCMI System Power support and related events' handling logic: the protocol support itself is trivial and boils down to some bare initializations and supporting one SCMI System Power notification event meant to carry platform-originated System transition requests. This is patch [1/3].
On top of this a new SCMI driver has been developed which registers for such System Power notification and acts accordingly to satisfy such plaform system-state transition requests that can be of forceful or graceful kind. In order to comply with such 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 it is possible to configure, via available module parameters, a specific signal to be sent to CAD pid. This is patch [2/3]. Patch [3/3] is a mere JUNO example of the minimal DT bindings needed to enable the protocol at the DT level and is NOT meant to be upstream as of now. Based on v5.9-rc1 (which now includes needed SCMI Notifications Core Support) Thanks Cristian ---- v4 --> v5 - rebased on v5.9-rc1 v3 --> v4 - rebased on top of scmi-next/for-next/scmi 5.8-rc3 - fixed some strict checkpatch issues V2 --> V3 - changed Kconfig to fix naming and defaulting System Power Control driver to n - fixes related to changes in SCMI Notifications core support V10 V1 --> V2 - use common event enums - introduced optional alternative signal based comms 2 userspace Cristian Marussi (3): firmware: arm_scmi: Add System Power Protocol support firmware: arm_scmi: Add SCMI System Power Control driver [DEBUG] arm64: dts: juno: add SCMI SystemPower Protocol support arch/arm64/boot/dts/arm/juno-base.dtsi | 4 + drivers/firmware/Kconfig | 12 + drivers/firmware/arm_scmi/Makefile | 3 +- drivers/firmware/arm_scmi/driver.c | 1 + .../firmware/arm_scmi/scmi_power_control.c | 389 ++++++++++++++++++ drivers/firmware/arm_scmi/system.c | 136 ++++++ include/linux/scmi_protocol.h | 18 + 7 files changed, 562 insertions(+), 1 deletion(-) create mode 100644 drivers/firmware/arm_scmi/scmi_power_control.c create mode 100644 drivers/firmware/arm_scmi/system.c -- 2.17.1
