Re: [PATCH v2 1/4] firmware: add new driver for SCMI firmwares

Hello Sudeep,

On Tue, 18 Aug 2020 at 17:44, Etienne Carriere etienne.carriere@linaro.org wrote:

This change introduces SCMI agent driver in U-Boot in the firmware U-class. (...) --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -1,6 +1,26 @@ config FIRMWARE bool "Enable Firmware driver support"

+config SCMI_FIRMWARE

•   bool "Enable SCMI support"
  

•   select FIRMWARE
  

•   select OF_TRANSLATE
  

•   depends on DM_MAILBOX || ARM_SMCCC
  

•   help
  

•     System Control and Management Interface (SCMI) is a communication
  

•     protocol that defines standard interfaces for power, performance
  

•     and system management. The SCMI specification is available at
  

•     https://developer.arm.com/architectures/system-architectures/software-standards/scmi
  

You suggested https://developer.arm.com/documentation/den0056/latest. It is shorter and points straight to the spec document whereas this link is used above points to more generic info about SCMI among which one can find the spec doc. Maybe I should change to the link you suggested.

•     An SCMI agent communicates with a related SCMI server firmware
  

•     located in another sub-system, as a companion micro controller
  

•     or a companion host in the CPU system.
  

•     Communications between agent (client) and the SCMI server are
  

•     based on message exchange. Messages can be exchange over tranport
  

Typo here: s/tranport/transport/

•     channels as a mailbox device or an Arm SMCCC service with some
  

•     piece of identified shared memory.
  

config SPL_FIRMWARE bool "Enable Firmware driver support in SPL" depends on FIRMWARE