Messages in this thread | | | From | Cristian Marussi <> | Subject | [PATCH v2 0/3] SCMI System Power Support | Date | Mon, 4 May 2020 17:55:37 +0100 |
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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.
The series is based on SCMI Notifications Core V7 [1] (only posted not merged) which in turn is based on top of scmi-for-next-5.7.
Thanks
Cristian
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[1] https://lore.kernel.org/linux-arm-kernel/20200504163855.54548-1-cristian.marussi@arm.com/
Cristian Marussi (3): firmware: arm_scmi: Add System Power Protocol support firmware: arm_scmi: Add SCMI System Power Control driver 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 | 145 +++++++ include/linux/scmi_protocol.h | 18 + 7 files changed, 571 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
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