Commit 8486a32d authored by Hector.Yuan's avatar Hector.Yuan Committed by Viresh Kumar
Browse files

cpufreq: Add of_perf_domain_get_sharing_cpumask 



Add of_perf_domain_get_sharing_cpumask function to group cpu
to specific performance domain.

Signed-off-by: default avatarHector.Yuan <hector.yuan@mediatek.com>
[ Viresh: create separate routine parse_perf_domain() and always set the
	  cpumask. ]
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent a8bbe0c9

include/linux/cpufreq.h

+57 −1
Original line number Diff line number Diff line
@@ -14,6 +14,8 @@ 
#include <linux/completion.h>

#include <linux/kobject.h>

#include <linux/notifier.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/pm_opp.h>

#include <linux/pm_qos.h>

#include <linux/spinlock.h>
@@ -1003,6 +1005,55 @@ static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy 


	return count;

}



static inline int parse_perf_domain(int cpu, const char *list_name,

				    const char *cell_name)

{

	struct device_node *cpu_np;

	struct of_phandle_args args;

	int ret;



	cpu_np = of_cpu_device_node_get(cpu);

	if (!cpu_np)

		return -ENODEV;



	ret = of_parse_phandle_with_args(cpu_np, list_name, cell_name, 0,

					 &args);

	if (ret < 0)

		return ret;



	of_node_put(cpu_np);



	return args.args[0];

}



static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name,

						     const char *cell_name, struct cpumask *cpumask)

{

	int target_idx;

	int cpu, ret;



	ret = parse_perf_domain(pcpu, list_name, cell_name);

	if (ret < 0)

		return ret;



	target_idx = ret;

	cpumask_set_cpu(pcpu, cpumask);



	for_each_possible_cpu(cpu) {

		if (cpu == pcpu)

			continue;



		ret = parse_perf_domain(pcpu, list_name, cell_name);

		if (ret < 0)

			continue;



		if (target_idx == ret)

			cpumask_set_cpu(cpu, cpumask);

	}



	return target_idx;

}

#else

static inline int cpufreq_boost_trigger_state(int state)

{
@@ -1022,6 +1073,12 @@ static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) 
{

	return false;

}



static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name,

						     const char *cell_name, struct cpumask *cpumask)

{

	return -EOPNOTSUPP;

}

#endif



#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
@@ -1043,7 +1100,6 @@ void arch_set_freq_scale(const struct cpumask *cpus, 
{

}

#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;