linux.git/include/linux/scmi_protocol.h, branch v7.2-rc1

firmware: arm_scmi: Introduce all_rates_get clock operation

2026-05-12T14:29:12+00:00

Add a clock operation to get the whole set of rates available to a specific
clock: when needed this request could transparently trigger a full rate
discovery enumeration if this specific clock-rates were previously only
lazily enumerated.

Reviewed-by: Peng Fan 
Signed-off-by: Cristian Marussi 
Link: https://patch.msgid.link/20260508153300.2224715-16-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla

firmware: arm_scmi: Make clock rates allocation dynamic

2026-05-12T14:29:11+00:00

Leveraging SCMI Clock protocol dynamic discovery capabilities, move away
from the static per-clock rates allocation model in favour of a dynamic
runtime allocation based on effectively discovered resources.

No functional change.

Reviewed-by: Peng Fan 
Signed-off-by: Cristian Marussi 
Tested-by: Florian Fainelli 
Tested-by: Geert Uytterhoeven 
Link: https://patch.msgid.link/20260508153300.2224715-8-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla

firmware: arm_scmi: Drop unused clock rate interfaces

2026-05-12T14:29:11+00:00

Only the unified interface exposing min_rate/max_rate is now used.

Reviewed-by: Peng Fan 
Signed-off-by: Cristian Marussi 
Link: https://patch.msgid.link/20260508153300.2224715-7-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla

firmware: arm_scmi: Simplify clock rates exposed interface

2026-05-12T14:29:11+00:00

Introduce a new internal struct scmi_clock_desc so as to be able to hide,
in the future, some of the needlessly public fields currently kept inside
scmi_clock_info, while keeping exposed only the two new min_rate and
max_rate fields for each clock.

No functional change.

Reviewed-by: Peng Fan 
Signed-off-by: Cristian Marussi 
Tested-by: Florian Fainelli 
Tested-by: Geert Uytterhoeven 
Link: https://patch.msgid.link/20260508153300.2224715-5-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla

firmware: arm_scmi: Add clock determine_rate operation

2026-05-12T14:29:10+00:00

Add a clock operation to help determining the effective rate, closest to
the required one, that a specific clock can support.

Calculation is currently performed kernel side and the logic is taken
directly from the SCMI Clock driver: embedding the determinate rate logic
in the protocol layer enables simplifications in the SCMI Clock protocol
interface and will more easily accommodate further evolutions where such
determine_rate logic into is optionally delegated to the platform SCMI
server.

Signed-off-by: Cristian Marussi 
Tested-by: Florian Fainelli 
Tested-by: Geert Uytterhoeven 
Link: https://patch.msgid.link/20260508153300.2224715-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla

firmware: arm_scmi: Rename struct scmi_revision_info to scmi_base_info

2026-05-05T14:45:58+00:00

Rename struct scmi_revision_info to struct scmi_base_info , to
accurately represent its content. The scmi_revision_info is no
longer accurate, because the structure now contains more than
only SCMI base protocol revision, it now also contains number
of protocols, agents, vendor and subvendor strings. All those
are fetched from the base protocol, so rename the structure to
scmi_base_info, to match the other scmi_*_info structure names.
No functional change.

Signed-off-by: Marek Vasut 
Link: https://patch.msgid.link/20260406155343.72087-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Sudeep Holla

firmware: arm_scmi: Fix function name typo in scmi_perf_proto_ops struct

2025-09-02T10:21:34+00:00

The performance protocol ops table incorrectly referenced
power_scale_mw_get instead of the correct power_scale_get.
Fix the typo to use the proper function.

Signed-off-by: Peng Fan 
Message-Id: <20250831-scmi-cpufreq-v1-1-493031cf6e9b@nxp.com>
Signed-off-by: Sudeep Holla

driver core: have match() callback in struct bus_type take a const *

2024-07-03T13:16:54+00:00

In the match() callback, the struct device_driver * should not be
changed, so change the function callback to be a const *.  This is one
step of many towards making the driver core safe to have struct
device_driver in read-only memory.

Because the match() callback is in all busses, all busses are modified
to handle this properly.  This does entail switching some container_of()
calls to container_of_const() to properly handle the constant *.

For some busses, like PCI and USB and HV, the const * is cast away in
the match callback as those busses do want to modify those structures at
this point in time (they have a local lock in the driver structure.)
That will have to be changed in the future if they wish to have their
struct device * in read-only-memory.

Cc: Rafael J. Wysocki 
Reviewed-by: Alex Elder 
Acked-by: Sumit Garg 
Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh
Signed-off-by: Greg Kroah-Hartman

firmware: arm_scmi: Add basic support for SCMI v3.2 pincontrol protocol

2024-04-19T14:17:37+00:00

Add basic implementation of the SCMI v3.2 pincontrol protocol.

Co-developed-by: Oleksii Moisieiev 
Signed-off-by: Oleksii Moisieiev 
Co-developed-by: Cristian Marussi 
Signed-off-by: Cristian Marussi 
Signed-off-by: Peng Fan 
Link: https://lore.kernel.org/r/20240418-pinctrl-scmi-v11-3-499dca9864a7@nxp.com
Signed-off-by: Sudeep Holla

firmware: arm_scmi: Simplify scmi_devm_notifier_unregister

2024-03-26T11:33:33+00:00

Unregistering SCMI notifications using the managed devres interface can be
done providing as a reference simply the previously successfully registered
notification block since it could have been registered only on one kernel
notification_chain: drop any reference to SCMI protocol, events and
sources.

Devres internal helpers can search for the provided notification block
reference and, once found, the associated devres object will already
provide the above SCMI references for the event.

Signed-off-by: Cristian Marussi 
Link: https://lore.kernel.org/r/20240325204620.1437237-5-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla