PM / OPP: add non-OF versions of dev_pm_opp_{cpumask_, }remove_table

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

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-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>

1 files changed, 43 insertions, 15 deletions

diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index 433b60092972..9f8bf04b4dbe 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -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() */