PM: EM: Rework the depends on for CONFIG_ENERGY_MODEL

JIRA: https://issues.redhat.com/browse/RHEL-110835

commit 17f0828
Author: Jeson Gao <jeson.gao@unisoc.com>
Date:   Fri Mar 7 13:23:49 2025 +0000

    PM: EM: Rework the depends on for CONFIG_ENERGY_MODEL

    Now not only CPUs can use energy efficiency models, but GPUs
    can also use. On the other hand, even with only one CPU, we can also
    use energy_model to align control in thermal.
    So remove the dependence of SMP, and add the DEVFREQ.

    Signed-off-by: Jeson Gao <jeson.gao@unisoc.com>
    [Added missing SMP config option in DTPM_CPU dependency]
    Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
    Link: https://patch.msgid.link/20250307132649.4056210-1-lukasz.luba@arm.com
    [ rjw: Subject edits ]
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Signed-off-by: Steve Best <sbest@redhat.com>

Author: sfbest

drivers/powercap/Kconfig

@@ -82,7 +82,7 @@ config DTPM
 
 config DTPM_CPU
 	bool "Add CPU power capping based on the energy model"
-	depends on DTPM && ENERGY_MODEL
+	depends on DTPM && ENERGY_MODEL && SMP
 	help
 	  This enables support for CPU power limitation based on
 	  energy model.

kernel/power/Kconfig

@@ -380,8 +380,7 @@ config CPU_PM
 
 config ENERGY_MODEL
 	bool "Energy Model for devices with DVFS (CPUs, GPUs, etc)"
-	depends on SMP
-	depends on CPU_FREQ
+	depends on CPU_FREQ || PM_DEVFREQ
 	help
 	  Several subsystems (thermal and/or the task scheduler for example)
 	  can leverage information about the energy consumed by devices to