firmware: arm_scmi: Add clock determine_rate operation

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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 <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260508153300.2224715-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>

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Cristian Marussi 2026-05-08 16:32:47 +01:00 • committed by Sudeep Holla

parent d0c81a38d0

commit ecde921eb4

2 changed files with 48 additions and 0 deletions

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42

drivers/firmware/arm_scmi/clock.c

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6

include/linux/scmi_protocol.h

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