diff options
| -rw-r--r-- | drivers/base/power/opp.c | 34 | ||||
| -rw-r--r-- | include/linux/pm_opp.h | 7 |
2 files changed, 41 insertions, 0 deletions
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index 663aae1c9834..204c6c945168 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -281,6 +281,40 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq); /** + * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not + * @opp: opp for which turbo mode is being verified + * + * Turbo OPPs are not for normal use, and can be enabled (under certain + * conditions) for short duration of times to finish high throughput work + * quickly. Running on them for longer times may overheat the chip. + * + * Return: true if opp is turbo opp, else false. + * + * Locking: This function must be called under rcu_read_lock(). opp is a rcu + * protected pointer. This means that opp which could have been fetched by + * opp_find_freq_{exact,ceil,floor} functions is valid as long as we are + * under RCU lock. The pointer returned by the opp_find_freq family must be + * used in the same section as the usage of this function with the pointer + * prior to unlocking with rcu_read_unlock() to maintain the integrity of the + * pointer. + */ +bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) +{ + struct dev_pm_opp *tmp_opp; + + opp_rcu_lockdep_assert(); + + tmp_opp = rcu_dereference(opp); + if (IS_ERR_OR_NULL(tmp_opp) || !tmp_opp->available) { + pr_err("%s: Invalid parameters\n", __func__); + return false; + } + + return tmp_opp->turbo; +} +EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo); + +/** * dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds * @dev: device for which we do this operation * diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index bb52fae5b921..cab7ba55bedb 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -30,6 +30,8 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp); unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp); +bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp); + int dev_pm_opp_get_opp_count(struct device *dev); unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev); @@ -63,6 +65,11 @@ static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) return 0; } +static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) +{ + return false; +} + static inline int dev_pm_opp_get_opp_count(struct device *dev) { return 0; |