PM / EM: introduce em_dev_register_perf_domain function

Add now function in the Energy Model framework which is going to support
new devices. This function will help in transition and make it smoother.
For now it still checks if the cpumask is a valid pointer, which will be
removed later when the new structures and infrastructure will be ready.

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Quentin Perret <qperret@google.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h
index fe336a9eb5d4..7c048df98447 100644
--- a/include/linux/energy_model.h
+++ b/include/linux/energy_model.h
@@ -2,6 +2,7 @@
 #ifndef _LINUX_ENERGY_MODEL_H
 #define _LINUX_ENERGY_MODEL_H
 #include <linux/cpumask.h>
+#include <linux/device.h>
 #include <linux/jump_label.h>
 #include <linux/kobject.h>
 #include <linux/rcupdate.h>
@@ -42,7 +43,7 @@ struct em_perf_domain {
 #define em_span_cpus(em) (to_cpumask((em)->cpus))
 
 #ifdef CONFIG_ENERGY_MODEL
-#define EM_CPU_MAX_POWER 0xFFFF
+#define EM_MAX_POWER 0xFFFF
 
 struct em_data_callback {
 	/**
@@ -59,7 +60,7 @@ struct em_data_callback {
 	 * and frequency.
 	 *
 	 * The power is the one of a single CPU in the domain, expressed in
-	 * milli-watts. It is expected to fit in the [0, EM_CPU_MAX_POWER]
+	 * milli-watts. It is expected to fit in the [0, EM_MAX_POWER]
 	 * range.
 	 *
 	 * Return 0 on success.
@@ -71,6 +72,8 @@ struct em_data_callback {
 struct em_perf_domain *em_cpu_get(int cpu);
 int em_register_perf_domain(cpumask_t *span, unsigned int nr_states,
 						struct em_data_callback *cb);
+int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
+				struct em_data_callback *cb, cpumask_t *span);
 
 /**
  * em_pd_energy() - Estimates the energy consumed by the CPUs of a perf. domain
@@ -174,6 +177,12 @@ static inline int em_register_perf_domain(cpumask_t *span,
 {
 	return -EINVAL;
 }
+static inline
+int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
+				struct em_data_callback *cb, cpumask_t *span)
+{
+	return -EINVAL;
+}
 static inline struct em_perf_domain *em_cpu_get(int cpu)
 {
 	return NULL;