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authorRajagopal Venkat <rajagopal.venkat@linaro.org>2012-10-26 03:50:26 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-11-15 03:35:04 +0400
commit7f98a905dca6e4f144cdd4462edeac00c2bdc379 (patch)
tree4841af3592cbd0b21f50a40f17900dfc9fc40804 /include/linux/devfreq.h
parent206c30cfeb7c05dfb9fdfd81b1deb933627e43c1 (diff)
downloadlinux-7f98a905dca6e4f144cdd4462edeac00c2bdc379.tar.xz
PM / devfreq: Add current freq callback in device profile
Devfreq returns governor predicted frequency as current frequency via sysfs interface. But device may not support all frequencies that governor predicts. So add a callback in device profile to get current freq from driver. Also add a new sysfs node to expose governor predicted next target frequency. Signed-off-by: Rajagopal Venkat <rajagopal.venkat@linaro.org> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/devfreq.h')
-rw-r--r--include/linux/devfreq.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index ee243a3229b8..7e2e2ea4a70f 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -66,6 +66,8 @@ struct devfreq_dev_status {
* explained above with "DEVFREQ_FLAG_*" macros.
* @get_dev_status The device should provide the current performance
* status to devfreq, which is used by governors.
+ * @get_cur_freq The device should provide the current frequency
+ * at which it is operating.
* @exit An optional callback that is called when devfreq
* is removing the devfreq object due to error or
* from devfreq_remove_device() call. If the user
@@ -79,6 +81,7 @@ struct devfreq_dev_profile {
int (*target)(struct device *dev, unsigned long *freq, u32 flags);
int (*get_dev_status)(struct device *dev,
struct devfreq_dev_status *stat);
+ int (*get_cur_freq)(struct device *dev, unsigned long *freq);
void (*exit)(struct device *dev);
};