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| author | Rajagopal Venkat <rajagopal.venkat@linaro.org> | 2012-10-26 01:50:26 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-11-15 00:35:04 +0100 |
| commit | 7f98a905dca6e4f144cdd4462edeac00c2bdc379 (patch) | |
| tree | 4841af3592cbd0b21f50a40f17900dfc9fc40804 /include/linux | |
| parent | 206c30cfeb7c05dfb9fdfd81b1deb933627e43c1 (diff) | |
| download | lwn-7f98a905dca6e4f144cdd4462edeac00c2bdc379.tar.gz lwn-7f98a905dca6e4f144cdd4462edeac00c2bdc379.zip | |
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')
| -rw-r--r-- | include/linux/devfreq.h | 3 |
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); }; |