Add needed fields to support new state: idle, where different polling interval is in use. It provides better control of the devfreq device and lower the power consumption when the device is not busy.
Signed-off-by: Lukasz Luba <[email protected]> --- include/linux/devfreq.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h index fbffa74..5140970 100644 --- a/include/linux/devfreq.h +++ b/include/linux/devfreq.h @@ -72,6 +72,11 @@ struct devfreq_dev_status { * @initial_freq: The operating frequency when devfreq_add_device() is * called. * @polling_ms: The polling interval in ms. 0 disables polling. + * @polling_idle_ms: The polling interval in 'idle state' in ms. + * When the device is running at lowest frequency and has + * low-load, it is considered as in 'idle state'. + * Thus, longer polling interval is used for the device + * to save some power. * @target: The device should set its operating frequency at * freq or lowest-upper-than-freq value. If freq is * higher than any operable frequency, set maximum. @@ -98,6 +103,7 @@ struct devfreq_dev_status { struct devfreq_dev_profile { unsigned long initial_freq; unsigned int polling_ms; + unsigned int polling_idle_ms; int (*target)(struct device *dev, unsigned long *freq, u32 flags); int (*get_dev_status)(struct device *dev, -- 2.7.4
