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This change implements a SMCCC transport for SCMI exchanges. This implementation follows the Linux kernel as references implementation for SCMI message processing, using the SMT format for communication channel meta-data. Use of SMCCC transport in SCMI FDT bindings are defined in the Linux kernel DT bindings since v5.8. SMCCC with SMT is implemented in OP-TEE from tag 3.9.0 [2]. Links: [2] https://github.com/OP-TEE/optee_os/commit/a58c4d706d23 Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org> Cc: Simon Glass <sjg@chromium.org> Cc: Peng Fan <peng.fan@nxp.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Simon Glass <sjg@chromium.org>
20 lines
844 B
Plaintext
20 lines
844 B
Plaintext
config SCMI_FIRMWARE
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bool "Enable SCMI support"
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select FIRMWARE
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select OF_TRANSLATE
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depends on SANDBOX || DM_MAILBOX || ARM_SMCCC
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help
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System Control and Management Interface (SCMI) is a communication
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protocol that defines standard interfaces for power, performance
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and system management. The SCMI specification is available at
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https://developer.arm.com/architectures/system-architectures/software-standards/scmi
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An SCMI agent communicates with a related SCMI server firmware
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located in another sub-system, as a companion micro controller
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or a companion host in the CPU system.
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Communications between agent (client) and the SCMI server are
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based on message exchange. Messages can be exchange over tranport
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channels as a mailbox device or an Arm SMCCC service with some
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piece of identified shared memory.
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