Merge: Update drivers/powercap to enable support for Arm SystemReady IR platforms

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/1372

```
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2126952

This is one of a series of patch sets to enable Arm SystemReady IR
support in the kernel for compliant platforms.  This set cleans up
powercap and enables DTPM for edge systems to use in thermal and power
management; this is all in drivers/powercap.  This set has been tested
via simple boot tests, and of course the CI loop.  This may be difficult
to test on Arm due to DTPM being a very new feature.  However, this is
exactly the same powercap framework used by intel_rapl, which should
continue to function properly regardless.

Signed-off-by: Al Stone <ahs3@redhat.com>
```

Approved-by: David Arcari <darcari@redhat.com>
Approved-by: Mark Langsdorf <mlangsdo@redhat.com>
Approved-by: Phil Auld <pauld@redhat.com>

Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>

Author: Frantisek Hrbata

Documentation/power/energy-model.rst

@@ -136,8 +136,8 @@ EM framework::
 
   -> drivers/cpufreq/foo_cpufreq.c
 
-  01	static int est_power(unsigned long *mW, unsigned long *KHz,
-  02			struct device *dev)
+  01	static int est_power(struct device *dev, unsigned long *mW,
+  02			unsigned long *KHz)
   03	{
   04		long freq, power;
   05

drivers/cpufreq/scmi-cpufreq.c

@@ -94,8 +94,8 @@ scmi_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
 }
 
 static int __maybe_unused
-scmi_get_cpu_power(unsigned long *power, unsigned long *KHz,
-		   struct device *cpu_dev)
+scmi_get_cpu_power(struct device *cpu_dev, unsigned long *power,
+		   unsigned long *KHz)
 {
 	unsigned long Hz;
 	int ret, domain;

drivers/opp/of.c

@@ -1448,7 +1448,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_of_node);
  * Returns 0 on success or a proper -EINVAL value in case of error.
  */
 static int __maybe_unused
-_get_dt_power(unsigned long *mW, unsigned long *kHz, struct device *dev)
+_get_dt_power(struct device *dev, unsigned long *mW, unsigned long *kHz)
 {
 	struct dev_pm_opp *opp;
 	unsigned long opp_freq, opp_power;
@@ -1482,8 +1482,8 @@ _get_dt_power(unsigned long *mW, unsigned long *kHz, struct device *dev)
  * Returns -EINVAL if the power calculation failed because of missing
  * parameters, 0 otherwise.
  */
-static int __maybe_unused _get_power(unsigned long *mW, unsigned long *kHz,
-				     struct device *dev)
+static int __maybe_unused _get_power(struct device *dev, unsigned long *mW,
+				     unsigned long *kHz)
 {
 	struct dev_pm_opp *opp;
 	struct device_node *np;

drivers/powercap/Kconfig

@@ -46,6 +46,7 @@ config IDLE_INJECT
 
 config DTPM
 	bool "Power capping for Dynamic Thermal Power Management (EXPERIMENTAL)"
+	depends on OF
 	help
 	  This enables support for the power capping for the dynamic
 	  thermal power management userspace engine.
@@ -56,4 +57,11 @@ config DTPM_CPU
 	help
 	  This enables support for CPU power limitation based on
 	  energy model.
+
+config DTPM_DEVFREQ
+	bool "Add device power capping based on the energy model"
+	depends on DTPM && ENERGY_MODEL
+	help
+	  This enables support for device power limitation based on
+	  energy model.
 endif

drivers/powercap/Makefile

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_DTPM) += dtpm.o
 obj-$(CONFIG_DTPM_CPU) += dtpm_cpu.o
+obj-$(CONFIG_DTPM_DEVFREQ) += dtpm_devfreq.o
 obj-$(CONFIG_POWERCAP)	+= powercap_sys.o
 obj-$(CONFIG_INTEL_RAPL_CORE) += intel_rapl_common.o
 obj-$(CONFIG_INTEL_RAPL) += intel_rapl_msr.o