thermal: cpu_cooling: Make the power-related code depend on IPA

The core CPU cooling infrastructure has power-related functions
that have only one client: IPA. Since there can be no user of those
functions if IPA is not compiled in, make sure to guard them with
checks on CONFIG_THERMAL_GOV_POWER_ALLOCATOR to not waste space
unnecessarily.

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Suggested-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20191030151451.7961-4-qperret@google.com

diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index 6b9865c..cc6b84e 100644 (file)
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -47,7 +47,9 @@
  */
 struct freq_table {
        u32 frequency;
+#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
        u32 power;
+#endif
 };
 
 /**
@@ -95,8 +97,7 @@ static DEFINE_IDA(cpufreq_ida);
 static DEFINE_MUTEX(cooling_list_lock);
 static LIST_HEAD(cpufreq_cdev_list);
 
-/* Below code defines functions to be used for cpufreq as cooling device */
-
+#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
 /**
  * get_level: Find the level for a particular frequency
  * @cpufreq_cdev: cpufreq_cdev for which the property is required
@@ -265,76 +266,6 @@ static u32 get_dynamic_power(struct cpufreq_cooling_device *cpufreq_cdev,
        return (raw_cpu_power * cpufreq_cdev->last_load) / 100;
 }
 
-/* cpufreq cooling device callback functions are defined below */
-
-/**
- * cpufreq_get_max_state - callback function to get the max cooling state.
- * @cdev: thermal cooling device pointer.
- * @state: fill this variable with the max cooling state.
- *
- * Callback for the thermal cooling device to return the cpufreq
- * max cooling state.
- *
- * Return: 0 on success, an error code otherwise.
- */
-static int cpufreq_get_max_state(struct thermal_cooling_device *cdev,
-                                unsigned long *state)
-{
-       struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
-
-       *state = cpufreq_cdev->max_level;
-       return 0;
-}
-
-/**
- * cpufreq_get_cur_state - callback function to get the current cooling state.
- * @cdev: thermal cooling device pointer.
- * @state: fill this variable with the current cooling state.
- *
- * Callback for the thermal cooling device to return the cpufreq
- * current cooling state.
- *
- * Return: 0 on success, an error code otherwise.
- */
-static int cpufreq_get_cur_state(struct thermal_cooling_device *cdev,
-                                unsigned long *state)
-{
-       struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
-
-       *state = cpufreq_cdev->cpufreq_state;
-
-       return 0;
-}
-
-/**
- * cpufreq_set_cur_state - callback function to set the current cooling state.
- * @cdev: thermal cooling device pointer.
- * @state: set this variable to the current cooling state.
- *
- * Callback for the thermal cooling device to change the cpufreq
- * current cooling state.
- *
- * Return: 0 on success, an error code otherwise.
- */
-static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev,
-                                unsigned long state)
-{
-       struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
-
-       /* Request state should be less than max_level */
-       if (WARN_ON(state > cpufreq_cdev->max_level))
-               return -EINVAL;
-
-       /* Check if the old cooling action is same as new cooling action */
-       if (cpufreq_cdev->cpufreq_state == state)
-               return 0;
-
-       cpufreq_cdev->cpufreq_state = state;
-
-       return freq_qos_update_request(&cpufreq_cdev->qos_req,
-                               cpufreq_cdev->freq_table[state].frequency);
-}
-
 /**
  * cpufreq_get_requested_power() - get the current power
  * @cdev:      &thermal_cooling_device pointer
@@ -478,22 +409,84 @@ static int cpufreq_power2state(struct thermal_cooling_device *cdev,
                                      power);
        return 0;
 }
+#endif /* CONFIG_THERMAL_GOV_POWER_ALLOCATOR */
+
+/* cpufreq cooling device callback functions are defined below */
+
+/**
+ * cpufreq_get_max_state - callback function to get the max cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: fill this variable with the max cooling state.
+ *
+ * Callback for the thermal cooling device to return the cpufreq
+ * max cooling state.
+ *
+ * Return: 0 on success, an error code otherwise.
+ */
+static int cpufreq_get_max_state(struct thermal_cooling_device *cdev,
+                                unsigned long *state)
+{
+       struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
+
+       *state = cpufreq_cdev->max_level;
+       return 0;
+}
+
+/**
+ * cpufreq_get_cur_state - callback function to get the current cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: fill this variable with the current cooling state.
+ *
+ * Callback for the thermal cooling device to return the cpufreq
+ * current cooling state.
+ *
+ * Return: 0 on success, an error code otherwise.
+ */
+static int cpufreq_get_cur_state(struct thermal_cooling_device *cdev,
+                                unsigned long *state)
+{
+       struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
+
+       *state = cpufreq_cdev->cpufreq_state;
+
+       return 0;
+}
+
+/**
+ * cpufreq_set_cur_state - callback function to set the current cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: set this variable to the current cooling state.
+ *
+ * Callback for the thermal cooling device to change the cpufreq
+ * current cooling state.
+ *
+ * Return: 0 on success, an error code otherwise.
+ */
+static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev,
+                                unsigned long state)
+{
+       struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
+
+       /* Request state should be less than max_level */
+       if (WARN_ON(state > cpufreq_cdev->max_level))
+               return -EINVAL;
+
+       /* Check if the old cooling action is same as new cooling action */
+       if (cpufreq_cdev->cpufreq_state == state)
+               return 0;
+
+       cpufreq_cdev->cpufreq_state = state;
+
+       return freq_qos_update_request(&cpufreq_cdev->qos_req,
+                               cpufreq_cdev->freq_table[state].frequency);
+}
 
 /* Bind cpufreq callbacks to thermal cooling device ops */
 
 static struct thermal_cooling_device_ops cpufreq_cooling_ops = {
-       .get_max_state = cpufreq_get_max_state,
-       .get_cur_state = cpufreq_get_cur_state,
-       .set_cur_state = cpufreq_set_cur_state,
-};
-
-static struct thermal_cooling_device_ops cpufreq_power_cooling_ops = {
        .get_max_state          = cpufreq_get_max_state,
        .get_cur_state          = cpufreq_get_cur_state,
        .set_cur_state          = cpufreq_set_cur_state,
-       .get_requested_power    = cpufreq_get_requested_power,
-       .state2power            = cpufreq_state2power,
-       .power2state            = cpufreq_power2state,
 };
 
 static unsigned int find_next_max(struct cpufreq_frequency_table *table,
@@ -603,17 +596,20 @@ __cpufreq_cooling_register(struct device_node *np,
                        pr_debug("%s: freq:%u KHz\n", __func__, freq);
        }
 
+       cooling_ops = &cpufreq_cooling_ops;
+
+#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
        if (capacitance) {
                ret = update_freq_table(cpufreq_cdev, capacitance);
                if (ret) {
                        cdev = ERR_PTR(ret);
                        goto remove_ida;
                }
-
-               cooling_ops = &cpufreq_power_cooling_ops;
-       } else {
-               cooling_ops = &cpufreq_cooling_ops;
+               cooling_ops->get_requested_power = cpufreq_get_requested_power;
+               cooling_ops->state2power = cpufreq_state2power;
+               cooling_ops->power2state = cpufreq_power2state;
        }
+#endif
 
        ret = freq_qos_add_request(&policy->constraints,
                                   &cpufreq_cdev->qos_req, FREQ_QOS_MAX,