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author | 2015-02-26 19:00:27 +0000 | |
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committer | 2015-05-04 21:27:52 -0700 | |
commit | e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8 (patch) | |
tree | 8a0602ce3137212c292dec7603c66120665255c8 /include/linux/thermal.h | |
parent | thermal: Add QPNP PMIC temperature alarm driver (diff) | |
download | linux-e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8.tar.gz linux-e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8.tar.bz2 linux-e33df1d2f3a0141cd79e770f31999ba0dd7ebfa8.zip |
thermal: let governors have private data for each thermal zone
A governor may need to store its current state between calls to
throttle(). That state depends on the thermal zone, so store it as
private data in struct thermal_zone_device.
The governors may have two new ops: bind_to_tz() and unbind_from_tz().
When provided, these functions let governors do some initialization
and teardown when they are bound/unbound to a tz and possibly store that
information in the governor_data field of the struct
thermal_zone_device.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'include/linux/thermal.h')
-rw-r--r-- | include/linux/thermal.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/thermal.h b/include/linux/thermal.h index bac0f52c7a1e..edf9d53c67e6 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -165,6 +165,7 @@ struct thermal_attr { * @ops: operations this &thermal_zone_device supports * @tzp: thermal zone parameters * @governor: pointer to the governor for this thermal zone + * @governor_data: private pointer for governor data * @thermal_instances: list of &struct thermal_instance of this thermal zone * @idr: &struct idr to generate unique id for this zone's cooling * devices @@ -191,6 +192,7 @@ struct thermal_zone_device { struct thermal_zone_device_ops *ops; const struct thermal_zone_params *tzp; struct thermal_governor *governor; + void *governor_data; struct list_head thermal_instances; struct idr idr; struct mutex lock; @@ -201,12 +203,19 @@ struct thermal_zone_device { /** * struct thermal_governor - structure that holds thermal governor information * @name: name of the governor + * @bind_to_tz: callback called when binding to a thermal zone. If it + * returns 0, the governor is bound to the thermal zone, + * otherwise it fails. + * @unbind_from_tz: callback called when a governor is unbound from a + * thermal zone. * @throttle: callback called for every trip point even if temperature is * below the trip point temperature * @governor_list: node in thermal_governor_list (in thermal_core.c) */ struct thermal_governor { char name[THERMAL_NAME_LENGTH]; + int (*bind_to_tz)(struct thermal_zone_device *tz); + void (*unbind_from_tz)(struct thermal_zone_device *tz); int (*throttle)(struct thermal_zone_device *tz, int trip); struct list_head governor_list; }; |