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Message-Id: <1420797291-15972-2-git-send-email-pi-cheng.chen@linaro.org>
Date: Fri, 9 Jan 2015 17:54:50 +0800
From: "pi-cheng.chen" <pi-cheng.chen@...aro.org>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Viresh Kumar <viresh.kumar@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc: "pi-cheng.chen" <pi-cheng.chen@...aro.org>,
linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
Mike Turquette <mturquette@...aro.org>,
linaro-kernel@...ts.linaro.org,
Eddie Huang <eddie.huang@...iatek.com>,
Yingjoe Chen <yingjoe.chen@...iatek.com>
Subject: [PATCH 1/2] cpufreq-dt: check CPU clock/power domain during initializing
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 <pi-cheng.chen@...aro.org>
---
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
--
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