arch_topology: Relocate cpu_scale to topology.[h|c]

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arch_topology.c provides functionality to parse and scale CPU capacity.
It also provides a corresponding sysfs interface. Some architectures
parse and scale CPU capacity differently as per their own needs. On
Intel processors, for instance, it is responsibility of the Intel
P-state driver.

Relocate the implementation of that interface to a common location in
topology.c. Architectures can use the interface and populate it using
their own mechanisms.

An alternative approach would be to compile arch_topology.c even if
not needed only to get this interface. This approach would create
duplicated and conflicting functionality and data structures.

Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Tested-by: Christian Loehle <christian.loehle@arm.com>
Link: https://patch.msgid.link/20250419025504.9760-2-ricardo.neri-calderon@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Ricardo Neri 2025-04-18 19:55:03 -07:00 • committed by Rafael J. Wysocki

parent 4854649b1f

commit 6bceea7a1e

4 changed files with 61 additions and 60 deletions

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52

drivers/base/arch_topology.c

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52

drivers/base/topology.c

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8

include/linux/arch_topology.h

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9

include/linux/topology.h

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