diff options
| -rw-r--r-- | drivers/base/power/opp/core.c | 58 | ||||
| -rw-r--r-- | drivers/base/power/opp/cpu.c | 60 | ||||
| -rw-r--r-- | include/linux/pm_opp.h | 10 |
3 files changed, 98 insertions, 30 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() */ diff --git a/drivers/base/power/opp/cpu.c b/drivers/base/power/opp/cpu.c index 8e0b6349d7d4..357781e0b791 100644 --- a/drivers/base/power/opp/cpu.c +++ b/drivers/base/power/opp/cpu.c @@ -119,20 +119,8 @@ 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(const struct cpumask *cpumask) +static void +_dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of) { struct device *cpu_dev; int cpu; @@ -147,9 +135,51 @@ void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *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(const struct cpumask *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(const struct cpumask *cpumask) +{ + _dev_pm_opp_cpumask_remove_table(cpumask, true); +} EXPORT_SYMBOL_GPL(dev_pm_opp_of_cpumask_remove_table); /** diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index 5221d259e413..bca26157f5b6 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -67,6 +67,8 @@ 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, const struct cpumask *cpumask); 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 unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) { @@ -190,6 +192,14 @@ static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpu return -EINVAL; } +static inline void dev_pm_opp_remove_table(struct device *dev) +{ +} + +static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask) +{ +} + #endif /* CONFIG_PM_OPP */ #if defined(CONFIG_PM_OPP) && defined(CONFIG_OF) |