From: Viresh Kumar <viresh.kumar@linaro.org>
To: Rafael Wysocki <rjw@rjwysocki.net>
Cc: linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org,
Stephen Boyd <sboyd@codeaurora.org>,
nm@ti.com, Viresh Kumar <viresh.kumar@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Len Brown <len.brown@intel.com>,
open list <linux-kernel@vger.kernel.org>,
Pavel Machek <pavel@ucw.cz>, Viresh Kumar <vireshk@kernel.org>
Subject: [PATCH V3 04/16] PM / OPP: Introduce dev_pm_opp_get_max_transition_latency()
Date: Tue, 9 Feb 2016 10:30:36 +0530 [thread overview]
Message-ID: <d1b7a10043a011e50c28d9ca95afc6f9d5cad734.1454992186.git.viresh.kumar@linaro.org> (raw)
In-Reply-To: <cover.1454992186.git.viresh.kumar@linaro.org>
In-Reply-To: <cover.1454992186.git.viresh.kumar@linaro.org>
In few use cases (like: cpufreq), it is desired to get the maximum
latency for changing OPPs. Add support for that.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
---
drivers/base/power/opp/core.c | 17 +++++++++++++++++
include/linux/pm_opp.h | 6 ++++++
2 files changed, 23 insertions(+)
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index ffe2406af882..b0f5c72f0fc3 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -290,6 +290,23 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency);
/**
+ * dev_pm_opp_get_max_transition_latency() - Get max transition latency in
+ * nanoseconds
+ * @dev: device for which we do this operation
+ *
+ * Return: This function returns the max transition latency, in nanoseconds, to
+ * switch from one OPP to other.
+ *
+ * Locking: This function takes rcu_read_lock().
+ */
+unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
+{
+ return dev_pm_opp_get_max_volt_latency(dev) +
+ dev_pm_opp_get_max_clock_latency(dev);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency);
+
+/**
* dev_pm_opp_get_suspend_opp() - Get suspend opp
* @dev: device for which we do this operation
*
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 5daa43058ac1..59da3d9e11ea 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -35,6 +35,7 @@ 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);
unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
+unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev);
struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
@@ -94,6 +95,11 @@ static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
return 0;
}
+static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
+{
+ return 0;
+}
+
static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
{
return NULL;
--
2.7.1.370.gb2aa7f8
next prev parent reply other threads:[~2016-02-09 5:01 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-09 5:00 [PATCH V3 00/16] PM / OPP: Introduce APIs to transition OPPs Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 01/16] PM / OPP: get/put regulators from OPP core Viresh Kumar
2016-02-09 19:04 ` Stephen Boyd
2016-02-09 5:00 ` [PATCH V3 02/16] PM / OPP: Disable OPPs that aren't supported by the regulator Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 03/16] PM / OPP: Introduce dev_pm_opp_get_max_volt_latency() Viresh Kumar
2016-02-09 19:04 ` Stephen Boyd
2016-02-09 5:00 ` Viresh Kumar [this message]
2016-02-09 5:00 ` [PATCH V3 05/16] PM / OPP: Parse clock-latency and voltage-tolerance for v1 bindings Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 06/16] PM / OPP: Manage device clk Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 07/16] PM / OPP: Add dev_pm_opp_set_rate() Viresh Kumar
2016-02-09 19:06 ` Stephen Boyd
2016-02-09 5:00 ` [PATCH V3 08/16] cpufreq: dt: Convert few pr_debug/err() calls to dev_dbg/err() Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 09/16] cpufreq: dt: Rename 'need_update' to 'opp_v1' Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 10/16] cpufreq: dt: OPP layers handles clock-latency for V1 bindings as well Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 11/16] cpufreq: dt: Pass regulator name to the OPP core Viresh Kumar
2016-02-09 19:07 ` Stephen Boyd
2018-07-17 7:46 ` Geert Uytterhoeven
2018-07-18 5:50 ` Viresh Kumar
2018-07-18 7:09 ` Geert Uytterhoeven
2018-07-18 7:16 ` Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 12/16] cpufreq: dt: Unsupported OPPs are already disabled Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 13/16] cpufreq: dt: Reuse dev_pm_opp_get_max_transition_latency() Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 14/16] cpufreq: dt: Use dev_pm_opp_set_rate() to switch frequency Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 15/16] cpufreq: dt: No need to fetch voltage-tolerance Viresh Kumar
2016-02-09 5:00 ` [PATCH V3 16/16] cpufreq: dt: No need to allocate resources anymore Viresh Kumar
2016-02-09 19:09 ` Stephen Boyd
2016-02-11 21:19 ` [PATCH V3 00/16] PM / OPP: Introduce APIs to transition OPPs Rafael J. Wysocki
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