Commit 32a55bbd authored by Cristian Marussi's avatar Cristian Marussi Committed by Sudeep Holla
Browse files

firmware: arm_scmi: Clarify raw per-channel ABI documentation 



Explain more in detail how the per-channel <m> identifier is chosen.

Suggested-by: default avatarVincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: default avatarCristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20230120122326.1932614-1-cristian.marussi@arm.com


Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent 7860701d

Documentation/ABI/testing/debugfs-scmi-raw

+10 −2
Original line number Diff line number Diff line
@@ -80,9 +80,13 @@ Description: SCMI Raw synchronous message injection/snooping facility; write 
		Each write to the entry causes one command request to be built

		and sent while the replies are read back one message at time

		(receiving an EOF at each message boundary).

		Channel identifier <m> matches the SCMI protocol number which

		has been associated with this transport channel in the DT

		description, with base protocol number 0x10 being the default

		channel for this instance.

		Note that these per-channel entries rooted at <..>/channels

		exist only if the transport is configured to have more than

		one channel.

		one default channel.

Users:		Debugging, any userspace test suite



What:		/sys/kernel/debug/scmi/<n>/raw/channels/<m>/message_async
@@ -103,7 +107,11 @@ Description: SCMI Raw asynchronous message injection/snooping facility; write 
		Each write to the entry causes one command request to be built

		and sent while the replies are read back one message at time

		(receiving an EOF at each message boundary).

		Channel identifier <m> matches the SCMI protocol number which

		has been associated with this transport channel in the DT

		description, with base protocol number 0x10 being the default

		channel for this instance.

		Note that these per-channel entries rooted at <..>/channels

		exist only if the transport is configured to have more than

		one channel.

		one default channel.

Users:		Debugging, any userspace test suite