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path: root/drivers/cpufreq/arm_big_little.c
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Diffstat (limited to 'drivers/cpufreq/arm_big_little.c')
-rw-r--r--drivers/cpufreq/arm_big_little.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index c5d256caa..c251247ae 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -23,6 +23,7 @@
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/cpumask.h>
+#include <linux/cpu_cooling.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/mutex.h>
@@ -55,6 +56,7 @@ static bool bL_switching_enabled;
#define ACTUAL_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq << 1 : freq)
#define VIRT_FREQ(cluster, freq) ((cluster == A7_CLUSTER) ? freq >> 1 : freq)
+static struct thermal_cooling_device *cdev[MAX_CLUSTERS];
static struct cpufreq_arm_bL_ops *arm_bL_ops;
static struct clk *clk[MAX_CLUSTERS];
static struct cpufreq_frequency_table *freq_table[MAX_CLUSTERS + 1];
@@ -493,6 +495,12 @@ static int bL_cpufreq_init(struct cpufreq_policy *policy)
static int bL_cpufreq_exit(struct cpufreq_policy *policy)
{
struct device *cpu_dev;
+ int cur_cluster = cpu_to_cluster(policy->cpu);
+
+ if (cur_cluster < MAX_CLUSTERS) {
+ cpufreq_cooling_unregister(cdev[cur_cluster]);
+ cdev[cur_cluster] = NULL;
+ }
cpu_dev = get_cpu_device(policy->cpu);
if (!cpu_dev) {
@@ -507,6 +515,38 @@ static int bL_cpufreq_exit(struct cpufreq_policy *policy)
return 0;
}
+static void bL_cpufreq_ready(struct cpufreq_policy *policy)
+{
+ struct device *cpu_dev = get_cpu_device(policy->cpu);
+ int cur_cluster = cpu_to_cluster(policy->cpu);
+ struct device_node *np;
+
+ /* Do not register a cpu_cooling device if we are in IKS mode */
+ if (cur_cluster >= MAX_CLUSTERS)
+ return;
+
+ np = of_node_get(cpu_dev->of_node);
+ if (WARN_ON(!np))
+ return;
+
+ if (of_find_property(np, "#cooling-cells", NULL)) {
+ u32 power_coefficient = 0;
+
+ of_property_read_u32(np, "dynamic-power-coefficient",
+ &power_coefficient);
+
+ cdev[cur_cluster] = of_cpufreq_power_cooling_register(np,
+ policy->related_cpus, power_coefficient, NULL);
+ if (IS_ERR(cdev[cur_cluster])) {
+ dev_err(cpu_dev,
+ "running cpufreq without cooling device: %ld\n",
+ PTR_ERR(cdev[cur_cluster]));
+ cdev[cur_cluster] = NULL;
+ }
+ }
+ of_node_put(np);
+}
+
static struct cpufreq_driver bL_cpufreq_driver = {
.name = "arm-big-little",
.flags = CPUFREQ_STICKY |
@@ -517,6 +557,7 @@ static struct cpufreq_driver bL_cpufreq_driver = {
.get = bL_cpufreq_get_rate,
.init = bL_cpufreq_init,
.exit = bL_cpufreq_exit,
+ .ready = bL_cpufreq_ready,
.attr = cpufreq_generic_attr,
};