[PATCH 1/2] cpufreq-dt: check CPU clock/power domain during initializing
From: pi-cheng.chen <hidden>
Date: 2015-01-09 09:56:06
Also in:
linux-pm, lkml
Subsystem:
cpu frequency scaling framework, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
Currently the DT based cpufreq driver is missing some way to check which CPUs share clocks. In the 1st patch, CPU clock/power domain information is added to the platform_data of cpufreq-dt so that cpufreq-dt driver could check which CPUs share clock/power. Signed-off-by: pi-cheng.chen <redacted> --- drivers/cpufreq/cpufreq-dt.c | 15 +++++++++++++++ include/linux/cpufreq-dt.h | 6 ++++++ 2 files changed, 21 insertions(+)
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index fde97d6..ff8c266 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c@@ -296,6 +296,21 @@ static int cpufreq_init(struct cpufreq_policy *policy) pd = cpufreq_get_driver_data(); if (!pd || !pd->independent_clocks) cpumask_setall(policy->cpus); + else if (pd && !list_empty(&pd->domain_list)) { + struct list_head *domain_node; + + list_for_each(domain_node, &pd->domain_list) { + struct cpufreq_cpu_domain *domain; + + domain = container_of(domain_node, + struct cpufreq_cpu_domain, node); + if (!cpumask_test_cpu(policy->cpu, &domain->cpus)) + continue; + + cpumask_copy(policy->cpus, &domain->cpus); + break; + } + } of_node_put(np);
diff --git a/include/linux/cpufreq-dt.h b/include/linux/cpufreq-dt.h
index 0414009..92bffd3 100644
--- a/include/linux/cpufreq-dt.h
+++ b/include/linux/cpufreq-dt.h@@ -10,6 +10,11 @@ #ifndef __CPUFREQ_DT_H__ #define __CPUFREQ_DT_H__ +struct cpufreq_cpu_domain { + struct list_head node; + cpumask_t cpus; +}; + struct cpufreq_dt_platform_data { /* * True when each CPU has its own clock to control its
@@ -17,6 +22,7 @@ struct cpufreq_dt_platform_data { * clock. */ bool independent_clocks; + struct list_head domain_list; }; #endif /* __CPUFREQ_DT_H__ */
--
1.9.1