From: "Hector.Yuan" <hector.yuan@xxxxxxxxxxxx>
Add of_perf_domain_get_sharing_cpumask function to group cpu
to specific performance domain.
Signed-off-by: Hector.Yuan <hector.yuan@xxxxxxxxxxxx>
---
include/linux/cpufreq.h | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 9fd7194..4916d70 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -13,6 +13,8 @@
#include <linux/completion.h>
#include <linux/kobject.h>
#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/pm_qos.h>
#include <linux/spinlock.h>
#include <linux/sysfs.h>
@@ -1036,6 +1038,43 @@ void arch_set_freq_scale(const struct cpumask *cpus,
}
#endif
+#ifdef CONFIG_CPU_FREQ
+static inline int of_perf_domain_get_sharing_cpumask(int index, const char *list_name,
+ const char *cell_name,
+ struct cpumask *cpumask)
+{
+ struct device_node *cpu_np;
+ struct of_phandle_args args;
+ int cpu, ret;
+
+ for_each_possible_cpu(cpu) {
+ cpu_np = of_cpu_device_node_get(cpu);
+ if (!cpu_np)
+ continue;
+
+ ret = of_parse_phandle_with_args(cpu_np, list_name,
+ cell_name, 0,
+ &args);
+
+ of_node_put(cpu_np);
+ if (ret < 0)
+ continue;
+
+ if (index == args.args[0])
+ cpumask_set_cpu(cpu, cpumask);
+ }
+
+ return 0;
+}
+#else
+static inline int of_perf_domain_get_sharing_cpumask(int index, const char *list_name,
+ const char *cell_name,
+ struct cpumask *cpumask)
+{
+ return 0;
+}
+#endif
+
/* the following are really really optional */
extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs;
--
1.7.9.5
