#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/tick.h>
+#include <linux/units.h>
#include <trace/events/power.h>
static LIST_HEAD(cpufreq_policy_list);
return new_freq;
if (policy->cur != new_freq) {
+ /*
+ * For some platforms, the frequency returned by hardware may be
+ * slightly different from what is provided in the frequency
+ * table, for example hardware may return 499 MHz instead of 500
+ * MHz. In such cases it is better to avoid getting into
+ * unnecessary frequency updates.
+ */
+ if (abs(policy->cur - new_freq) < HZ_PER_MHZ)
+ return policy->cur;
+
cpufreq_out_of_sync(policy, new_freq);
if (update)
schedule_work(&policy->update);