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| author | Dmitry Osipenko <digetx@gmail.com> | 2019-11-05 00:56:14 +0300 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2019-11-06 12:04:01 +0900 |
| commit | 5c0f6c79595760c9e366c3517314051af530e3e6 (patch) | |
| tree | 47f8943363f826ff6882136883d0aa13aafe2cef /drivers/devfreq/governor.h | |
| parent | 28615e37be96877e5bb3559f566e50a291cf7a05 (diff) | |
| download | lwn-5c0f6c79595760c9e366c3517314051af530e3e6.tar.gz lwn-5c0f6c79595760c9e366c3517314051af530e3e6.zip | |
PM / devfreq: Add new interrupt_driven flag for governors
Currently interrupt-driven governors (like NVIDIA Tegra30 ACTMON governor)
are used to set polling_ms=0 in order to avoid periodic polling of device
status by devfreq core. This means that polling interval can't be changed
by userspace for such governors.
The new governor flag allows interrupt-driven governors to convey that
devfreq core shouldn't perform polling of device status and thus generic
devfreq polling interval could be supported by these governors now.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/devfreq/governor.h')
| -rw-r--r-- | drivers/devfreq/governor.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h index bbe5ff9fcecf..dc7533ccc3db 100644 --- a/drivers/devfreq/governor.h +++ b/drivers/devfreq/governor.h @@ -31,6 +31,8 @@ * @name: Governor's name * @immutable: Immutable flag for governor. If the value is 1, * this govenror is never changeable to other governor. + * @interrupt_driven: Devfreq core won't schedule polling work for this + * governor if value is set to 1. * @get_target_freq: Returns desired operating frequency for the device. * Basically, get_target_freq will run * devfreq_dev_profile.get_dev_status() to get the @@ -49,6 +51,7 @@ struct devfreq_governor { const char name[DEVFREQ_NAME_LEN]; const unsigned int immutable; + const unsigned int interrupt_driven; int (*get_target_freq)(struct devfreq *this, unsigned long *freq); int (*event_handler)(struct devfreq *devfreq, unsigned int event, void *data); |