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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2014-10-19 13:30:27 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-10-21 02:51:01 +0400
commit51315cdfa0521fff3059cec5fb8ffecc7f37cba7 (patch)
treede84c1bf01703c640086afc019cdef697fe143b1 /drivers
parentf114040e3ea6e07372334ade75d1ee0775c355e1 (diff)
downloadlinux-51315cdfa0521fff3059cec5fb8ffecc7f37cba7.tar.xz
cpufreq: allow driver-specific data
This commit extends the cpufreq_driver structure with an additional 'void *driver_data' field that can be filled by the ->probe() function of a cpufreq driver to pass additional custom information to the driver itself. A new function called cpufreq_get_driver_data() is added to allow a cpufreq driver to retrieve those driver data, since they are typically needed from a cpufreq_policy->init() callback, which does not have access to the cpufreq_driver structure. This function call is similar to the existing cpufreq_get_current_driver() function call. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/cpufreq/cpufreq.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 24bf76fba141..058d6e084a6d 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1731,6 +1731,21 @@ const char *cpufreq_get_current_driver(void)
}
EXPORT_SYMBOL_GPL(cpufreq_get_current_driver);
+/**
+ * cpufreq_get_driver_data - return current driver data
+ *
+ * Return the private data of the currently loaded cpufreq
+ * driver, or NULL if no cpufreq driver is loaded.
+ */
+void *cpufreq_get_driver_data(void)
+{
+ if (cpufreq_driver)
+ return cpufreq_driver->driver_data;
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(cpufreq_get_driver_data);
+
/*********************************************************************
* NOTIFIER LISTS INTERFACE *
*********************************************************************/