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The main additions this time around are:
1. The capability to trace full SCMI message headers and payloads.
The recent unearthing of chain of old firmware issues motivated
this effort so that it is easier to trace them and debug quicker
than it took this time around in absence of such tracing.
2. SCMI System power control driver to handle platform's requests for a
graceful shutdown. Though the system power control protocol has been
around since the begining of SCMI, it lacked the timeout information
that was added in SCMI v3.1 that enables kernel to take appropriate
action within the timeout and doesn't have to rely on any other
user inputs(which was blocking factor for addition of this driver
earlier)
3. Support for SCMI Power Capping protocol that was introduced in SCMI v3.1
This protocol is intended for controlling and monitoring the power
consumption of power capping domains. The firmware also provides the
hierarchy of powercap domains by providing parent domain information.
It also contains a bug fix in the old SCPI driver addressing possible
user-after-free issues.
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Merge tag 'scmi-updates-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into arm/drivers
Arm SCMI updates for v5.20
The main additions this time around are:
1. The capability to trace full SCMI message headers and payloads.
The recent unearthing of chain of old firmware issues motivated
this effort so that it is easier to trace them and debug quicker
than it took this time around in absence of such tracing.
2. SCMI System power control driver to handle platform's requests for a
graceful shutdown. Though the system power control protocol has been
around since the begining of SCMI, it lacked the timeout information
that was added in SCMI v3.1 that enables kernel to take appropriate
action within the timeout and doesn't have to rely on any other
user inputs(which was blocking factor for addition of this driver
earlier)
3. Support for SCMI Power Capping protocol that was introduced in SCMI v3.1
This protocol is intended for controlling and monitoring the power
consumption of power capping domains. The firmware also provides the
hierarchy of powercap domains by providing parent domain information.
It also contains a bug fix in the old SCPI driver addressing possible
user-after-free issues.
* tag 'scmi-updates-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
firmware: arm_scmi: Use fast channel tracing
include: trace: Add SCMI fast channel tracing
firmware: arm_scmi: Add SCMI v3.1 powercap fast channels support
firmware: arm_scmi: Generalize the fast channel support
firmware: arm_scmi: Add SCMI v3.1 powercap protocol basic support
dt-bindings: firmware: arm,scmi: Add support for powercap protocol
firmware: arm_scmi: Add SCMI System Power Control driver
firmware: arm_scmi: Add devm_protocol_acquire helper
firmware: arm_scmi: Add SCMI v3.1 System Power extensions
firmware: arm_scmi: Support only one single system power device
firmware: arm_scmi: Use new SCMI full message tracing
include: trace: Add SCMI full message tracing
firmware: arm_scpi: Ensure scpi_info is not assigned if the probe fails
firmware: arm_scmi: Remove usage of the deprecated ida_simple_xxx API
firmware: arm_scmi: Fix response size warning for OPTEE transport
firmware: arm_scmi: Relax CLOCK_DESCRIBE_RATES out-of-spec checks
Link: https://lore.kernel.org/r/20220706115045.2272678-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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