forked from luck/tmp_suning_uos_patched
PM / OPP: add dev_pm_opp_is_turbo() helper
Add dev_pm_opp_is_turbo() helper to verify if an opp is to be used only for turbo mode or not. Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -280,6 +280,40 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
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/**
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* dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not
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* @opp: opp for which turbo mode is being verified
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*
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* Turbo OPPs are not for normal use, and can be enabled (under certain
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* conditions) for short duration of times to finish high throughput work
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* quickly. Running on them for longer times may overheat the chip.
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*
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* Return: true if opp is turbo opp, else false.
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*
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* Locking: This function must be called under rcu_read_lock(). opp is a rcu
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* protected pointer. This means that opp which could have been fetched by
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* opp_find_freq_{exact,ceil,floor} functions is valid as long as we are
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* under RCU lock. The pointer returned by the opp_find_freq family must be
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* used in the same section as the usage of this function with the pointer
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* prior to unlocking with rcu_read_unlock() to maintain the integrity of the
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* pointer.
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*/
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bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
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{
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struct dev_pm_opp *tmp_opp;
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opp_rcu_lockdep_assert();
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tmp_opp = rcu_dereference(opp);
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if (IS_ERR_OR_NULL(tmp_opp) || !tmp_opp->available) {
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pr_err("%s: Invalid parameters\n", __func__);
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return false;
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}
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return tmp_opp->turbo;
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}
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EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo);
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/**
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* dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds
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* @dev: device for which we do this operation
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@ -30,6 +30,8 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
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unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
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bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
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int dev_pm_opp_get_opp_count(struct device *dev);
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unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
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@ -63,6 +65,11 @@ static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
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return 0;
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}
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static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
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{
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return false;
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}
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static inline int dev_pm_opp_get_opp_count(struct device *dev)
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{
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return 0;
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