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authorIonela Voinescu <ionela.voinescu@arm.com>2020-12-14 15:38:22 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-12-15 21:19:32 +0300
commitcfdc589f4b5f94bf1a975b4a67d8163d533f6e9b (patch)
treebbfd34bf9f264478ee46ce36f97d988225324626 /drivers/cpufreq/cppc_cpufreq.c
parentbf76bb208f2b653306f2fc8f9c2a22f9890702bd (diff)
downloadlinux-cfdc589f4b5f94bf1a975b4a67d8163d533f6e9b.tar.xz
cppc_cpufreq: expose information on frequency domains
Use the existing sysfs attribute "freqdomain_cpus" to expose information to userspace about CPUs in the same frequency domain. Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Mian Yousaf Kaukab <ykaukab@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cppc_cpufreq.c')
-rw-r--r--drivers/cpufreq/cppc_cpufreq.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index f15a44c8b6b7..40b58d2dbbc6 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -402,6 +402,19 @@ static int cppc_cpufreq_set_boost(struct cpufreq_policy *policy, int state)
return 0;
}
+static ssize_t show_freqdomain_cpus(struct cpufreq_policy *policy, char *buf)
+{
+ unsigned int cpu = policy->cpu;
+
+ return cpufreq_show_cpus(all_cpu_data[cpu]->shared_cpu_map, buf);
+}
+cpufreq_freq_attr_ro(freqdomain_cpus);
+
+static struct freq_attr *cppc_cpufreq_attr[] = {
+ &freqdomain_cpus,
+ NULL,
+};
+
static struct cpufreq_driver cppc_cpufreq_driver = {
.flags = CPUFREQ_CONST_LOOPS,
.verify = cppc_verify_policy,
@@ -410,6 +423,7 @@ static struct cpufreq_driver cppc_cpufreq_driver = {
.init = cppc_cpufreq_cpu_init,
.stop_cpu = cppc_cpufreq_stop_cpu,
.set_boost = cppc_cpufreq_set_boost,
+ .attr = cppc_cpufreq_attr,
.name = "cppc_cpufreq",
};