From a8c959402d4dd6823918b33828d79900ae58c700 Mon Sep 17 00:00:00 2001 From: Lukasz Luba Date: Wed, 20 Dec 2023 23:17:45 +0000 Subject: thermal: core: Add governor callback for thermal zone change Add a new callback to the struct thermal_governor. It can be used for updating governors when there is a change in the thermal zone internals, e.g. thermal cooling device is bind to the thermal zone. That makes possible to move some heavy operations like memory allocations related to the number of cooling instances out of the throttle() callback. Both callback code paths (throttle() and update_tz()) are protected with the same thermal zone lock, which guaranties the consistency. Signed-off-by: Lukasz Luba Signed-off-by: Rafael J. Wysocki --- include/linux/thermal.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux') diff --git a/include/linux/thermal.h b/include/linux/thermal.h index d00622b64d50..4d96fefb2767 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -51,6 +51,8 @@ enum thermal_notify_event { THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */ THERMAL_TABLE_CHANGED, /* Thermal table(s) changed */ THERMAL_EVENT_KEEP_ALIVE, /* Request for user space handler to respond */ + THERMAL_TZ_BIND_CDEV, /* Cooling dev is bind to the thermal zone */ + THERMAL_TZ_UNBIND_CDEV, /* Cooling dev is unbind from the thermal zone */ }; /** @@ -199,6 +201,8 @@ struct thermal_zone_device { * thermal zone. * @throttle: callback called for every trip point even if temperature is * below the trip point temperature + * @update_tz: callback called when thermal zone internals have changed, e.g. + * thermal cooling instance was added/removed * @governor_list: node in thermal_governor_list (in thermal_core.c) */ struct thermal_governor { @@ -207,6 +211,8 @@ struct thermal_governor { void (*unbind_from_tz)(struct thermal_zone_device *tz); int (*throttle)(struct thermal_zone_device *tz, const struct thermal_trip *trip); + void (*update_tz)(struct thermal_zone_device *tz, + enum thermal_notify_event reason); struct list_head governor_list; }; -- cgit v1.2.3