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authorViresh Kumar <viresh.kumar@linaro.org>2017-01-23 10:11:42 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-01-30 09:22:20 +0100
commitf067a982cefa8df5642212bb0c7e25974831f781 (patch)
treeabc4cc23a4e49cb000104b09182ec4defab569dd /include/linux/pm_opp.h
parent37a73ec0c9bbd712d24cc2035696893e5b6119a5 (diff)
downloadop-kernel-dev-f067a982cefa8df5642212bb0c7e25974831f781.zip
op-kernel-dev-f067a982cefa8df5642212bb0c7e25974831f781.tar.gz
PM / OPP: Add 'struct kref' to OPP table
Add kref to struct opp_table for easier accounting of the OPP table. Note that the new routine dev_pm_opp_get_opp_table() takes the reference from under the opp_table_lock, which guarantees that the OPP table doesn't get freed unless dev_pm_opp_put_opp_table() is called for the OPP table. Two separate release mechanisms are added: locked and unlocked. In unlocked version the routines aren't required to take/drop opp_table_lock as the callers have already done that. This is required to avoid breaking git bisect, otherwise we may get lockdeps between commits. Once all the users of OPP table are updated the unlocked version shall be removed. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/pm_opp.h')
-rw-r--r--include/linux/pm_opp.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 66a02de..d867c6b 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -78,6 +78,9 @@ struct dev_pm_set_opp_data {
#if defined(CONFIG_PM_OPP)
+struct opp_table *dev_pm_opp_get_opp_table(struct device *dev);
+void dev_pm_opp_put_opp_table(struct opp_table *opp_table);
+
unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
@@ -126,6 +129,13 @@ int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
void dev_pm_opp_remove_table(struct device *dev);
void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
#else
+static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
+{
+ return ERR_PTR(-ENOTSUPP);
+}
+
+static inline void dev_pm_opp_put_opp_table(struct opp_table *opp_table) {}
+
static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
{
return 0;
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