From: Bartlomiej Zolnierkiewicz <[email protected]> Add dev_pm_opp_is_turbo() helper to verify if an opp is to be used only for turbo mode or not.
Cc: Tomasz Figa <[email protected]> Cc: Michael Turquette <[email protected]> Cc: Javier Martinez Canillas <[email protected]> Cc: Thomas Abraham <[email protected]> Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]> Signed-off-by: Viresh Kumar <[email protected]> --- drivers/base/power/opp.c | 30 ++++++++++++++++++++++++++++++ include/linux/pm_opp.h | 7 +++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index b38f2600d797..a0c54058c4dd 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -281,6 +281,36 @@ 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 true if opp was trubo OPP + * @opp: opp for which turbo mode is being verified + * + * 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 (unlikely(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; -- 2.4.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
