@@ -1845,21 +1845,11 @@ struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
-#ifdef CONFIG_OF
/**
- * dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT
- * entries
- * @dev: device pointer used to lookup OPP table.
- *
- * Free OPPs created using static entries present in DT.
- *
- * Locking: The internal opp_table and opp structures are RCU protected.
- * Hence this function indirectly uses RCU updater strategy with mutex locks
- * to keep the integrity of the internal data structures. Callers should ensure
- * that this function is *NOT* called under RCU protection or in contexts where
- * mutex cannot be locked.
+ * Free OPPs either created using static entries present in DT or even the
+ * dynamically added entries based on remove_all param.
*/
-void dev_pm_opp_of_remove_table(struct device *dev)
+static void _dev_pm_opp_remove_table(struct device *dev, bool remove_all)
{
struct opp_table *opp_table;
struct dev_pm_opp *opp, *tmp;
@@ -1884,7 +1874,7 @@ void dev_pm_opp_of_remove_table(struct device *dev)
if (list_is_singular(&opp_table->dev_list)) {
/* Free static OPPs */
list_for_each_entry_safe(opp, tmp, &opp_table->opp_list, node) {
- if (!opp->dynamic)
+ if (remove_all || !opp->dynamic)
_opp_remove(opp_table, opp, true);
}
} else {
@@ -1894,6 +1884,44 @@ void dev_pm_opp_of_remove_table(struct device *dev)
unlock:
mutex_unlock(&opp_table_lock);
}
+
+/**
+ * dev_pm_opp_remove_table() - Free all OPPs associated with the device
+ * @dev: device pointer used to lookup OPP table.
+ *
+ * Free both OPPs created using static entries present in DT and the
+ * dynamically added entries.
+ *
+ * Locking: The internal opp_table and opp structures are RCU protected.
+ * Hence this function indirectly uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ */
+void dev_pm_opp_remove_table(struct device *dev)
+{
+ _dev_pm_opp_remove_table(dev, true);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table);
+
+#ifdef CONFIG_OF
+/**
+ * dev_pm_opp_of_remove_table() - Free OPP table entries created from static DT
+ * entries
+ * @dev: device pointer used to lookup OPP table.
+ *
+ * Free OPPs created using static entries present in DT.
+ *
+ * Locking: The internal opp_table and opp structures are RCU protected.
+ * Hence this function indirectly uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ */
+void dev_pm_opp_of_remove_table(struct device *dev)
+{
+ _dev_pm_opp_remove_table(dev, false);
+}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
/* Returns opp descriptor node for a device, caller must do of_node_put() */
@@ -119,20 +119,7 @@ void dev_pm_opp_free_cpufreq_table(struct device *dev,
EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
#endif /* CONFIG_CPU_FREQ */
-#ifdef CONFIG_OF
-/**
- * dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask
- * @cpumask: cpumask for which OPP table needs to be removed
- *
- * This removes the OPP tables for CPUs present in the @cpumask.
- *
- * Locking: The internal opp_table and opp structures are RCU protected.
- * Hence this function internally uses RCU updater strategy with mutex locks
- * to keep the integrity of the internal data structures. Callers should ensure
- * that this function is *NOT* called under RCU protection or in contexts where
- * mutex cannot be locked.
- */
-void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)
+static void _dev_pm_opp_cpumask_remove_table(cpumask_var_t cpumask, bool of)
{
struct device *cpu_dev;
int cpu;
@@ -147,9 +134,51 @@ void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)
continue;
}
- dev_pm_opp_of_remove_table(cpu_dev);
+ if (of)
+ dev_pm_opp_of_remove_table(cpu_dev);
+ else
+ dev_pm_opp_remove_table(cpu_dev);
}
}
+
+/**
+ * dev_pm_opp_cpumask_remove_table() - Removes OPP table for @cpumask
+ * @cpumask: cpumask for which OPP table needs to be removed
+ *
+ * This removes the OPP tables for CPUs present in the @cpumask.
+ * This should be used to remove all the OPPs entries associated with
+ * the cpus in @cpumask.
+ *
+ * Locking: The internal opp_table and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ */
+void dev_pm_opp_cpumask_remove_table(cpumask_var_t cpumask)
+{
+ _dev_pm_opp_cpumask_remove_table(cpumask, false);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_cpumask_remove_table);
+
+#ifdef CONFIG_OF
+/**
+ * dev_pm_opp_of_cpumask_remove_table() - Removes OPP table for @cpumask
+ * @cpumask: cpumask for which OPP table needs to be removed
+ *
+ * This removes the OPP tables for CPUs present in the @cpumask.
+ * This should be used only to remove static entries created from DT.
+ *
+ * Locking: The internal opp_table and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ */
+void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)
+{
+ _dev_pm_opp_cpumask_remove_table(cpumask, true);
+}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table);
/**
@@ -66,6 +66,8 @@ int dev_pm_opp_set_regulator(struct device *dev, const char *name);
void dev_pm_opp_put_regulator(struct device *dev);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
+void dev_pm_opp_remove_table(struct device *dev);
+void dev_pm_opp_cpumask_remove_table(cpumask_var_t cpumask);
#else
static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
{
@@ -184,6 +186,14 @@ static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_va
return -ENOSYS;
}
+static inline void dev_pm_opp_remove_table(struct device *dev)
+{
+}
+
+static inline void dev_pm_opp_cpumask_remove_table(cpumask_var_t cpumask)
+{
+}
+
#endif /* CONFIG_PM_OPP */
#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
Functions dev_pm_opp_of_{cpumask_,}remove_table removes/frees all the static OPP entries associated with the device and/or all cpus(in case of cpumask) that are created from DT. However the OPP entries are populated reading from the firmware or some different method using dev_pm_opp_add are marked dynamic and can't be removed using above functions. This patch adds non DT/OF versions of dev_pm_opp_{cpumask_,}remove_table to support the above mentioned usecase. This is in preparation to make use of the same in scpi-cpufreq.c Cc: Viresh Kumar <vireshk@kernel.org> Cc: Nishanth Menon <nm@ti.com> CC: Stephen Boyd <sboyd@codeaurora.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: linux-pm@vger.kernel.org Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> --- drivers/base/power/opp/core.c | 56 ++++++++++++++++++++++++++++++---------- drivers/base/power/opp/cpu.c | 59 ++++++++++++++++++++++++++++++++----------- include/linux/pm_opp.h | 10 ++++++++ 3 files changed, 96 insertions(+), 29 deletions(-) v1->v2: - Instead of renaming OF versions, created non-OF versions of dev_pm_opp_{cpumask_,}remove_table as suggested by Viresh This version also updates all the errors in documentation and changes to use remove_all rather than remove_dyn.