Merge tag 'scmi-updates-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep...

Arm SCMI firmware interface updates for v5.18

Few main additions include:
- Support for OPTEE based SCMI transport to enable using SCMI service
  provided by OPTEE on some platforms
- Support for atomic SCMI transports which enables few SCMI transactions
  to be completed in atomic context. This involves other refactoring work
  associated with it. It also marks SMC and OPTEE as atomic transport as
  the commands are completed once the return.
- Support for polling mode in SCMI VirtIO transport in order to support
  atomic operations
- Support for atomic clock operations based on availability of atomic
  capability in the underlying SCMI transport

Other changes involves some trace and log enhancements and miscellaneous
bug fixes.

* tag 'scmi-updates-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux: (28 commits)
  clk: scmi: Support atomic clock enable/disable API
  firmware: arm_scmi: Add support for clock_enable_latency
  firmware: arm_scmi: Add atomic support to clock protocol
  firmware: arm_scmi: Support optional system wide atomic-threshold-us
  dt-bindings: firmware: arm,scmi: Add atomic-threshold-us optional property
  firmware: arm_scmi: Add atomic mode support to virtio transport
  firmware: arm_scmi: Review virtio free_list handling
  firmware: arm_scmi: Add a virtio channel refcount
  firmware: arm_scmi: Disable ftrace for Clang Thumb2 builds
  firmware: arm_scmi: Add new parameter to mark_txdone
  firmware: arm_scmi: Add atomic mode support to smc transport
  firmware: arm_scmi: Add support for atomic transports
  firmware: arm_scmi: Make optee support sync_cmds_completed_on_ret
  firmware: arm_scmi: Make smc support sync_cmds_completed_on_ret
  firmware: arm_scmi: Add sync_cmds_completed_on_ret transport flag
  firmware: arm_scmi: Make smc transport use common completions
  firmware: arm_scmi: Add configurable polling mode for transports
  firmware: arm_scmi: Use new trace event scmi_xfer_response_wait
  include: trace: Add new scmi_xfer_response_wait event
  firmware: arm_scmi: Refactor message response path
  ...

Link: https://lore.kernel.org/r/20220222201742.3338589-1-sudeep.holla@arm.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>