[PATCH v2 1/7] opp: add dev_pm_opp_get_turbo_mode_setting() helper
From: Bartlomiej Zolnierkiewicz <hidden>
Date: 2015-07-09 15:44:46
Also in:
linux-clk, linux-pm, linux-samsung-soc, lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, hibernation (aka software suspend, aka swsusp), operating performance points (opp), power management core, suspend to ram, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Viresh Kumar, Nishanth Menon, Stephen Boyd, Linus Torvalds
Add dev_pm_opp_get_turbo_mode_setting() helper for getting turbo mode setting for a given opp. Cc: Tomasz Figa <redacted> Cc: Michael Turquette <mturquette@baylibre.com> Cc: Javier Martinez Canillas <javier@dowhile0.org> Cc: Thomas Abraham <redacted> Cc: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Bartlomiej Zolnierkiewicz <redacted> --- drivers/base/power/opp.c | 31 +++++++++++++++++++++++++++++++ include/linux/pm_opp.h | 7 +++++++ 2 files changed, 38 insertions(+)
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index e24502a2..6b34b2a 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c@@ -287,6 +287,37 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq); /** + * dev_pm_opp_get_turbo_mode_setting() - Gets the turbo setting + * @opp: opp for which turbo mode setting has to be returned for + * + * Return: turbo mode setting corresponding to the opp (true or 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_get_turbo_mode_setting(struct dev_pm_opp *opp) +{ + struct dev_pm_opp *tmp_opp; + bool f = false; + + 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__); + else + f = tmp_opp->turbo; + + return f; +} +EXPORT_SYMBOL_GPL(dev_pm_opp_get_turbo_mode_setting); + +/** * 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 bb52fae..7856baf 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_get_turbo_mode_setting(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_get_turbo_mode_setting(struct dev_pm_opp *opp) +{ + return false; +} + static inline int dev_pm_opp_get_opp_count(struct device *dev) { return 0;
--
1.9.1