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thermal/core: Add critical and hot ops 

Currently there is no way to the sensors to directly call an ops in
interrupt mode without calling thermal_zone_device_update assuming all
the trip points are defined.

A sensor may want to do something special if a trip point is hot or
critical.

This patch adds the critical and hot ops to the thermal zone device,
so a sensor can directly invoke them or let the thermal framework to
call the sensor specific ones.

Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20201210121514.25760-2-daniel.lezcano@linaro.org
zero-sugar-mainline-defconfig
Daniel Lezcano 2020-12-10 13:15:11 +01:00
parent 433178e758
commit d7203eedf4
2 changed files with 30 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/thermal/thermal_core.c
View File

@ -380,6 +380,25 @@ static void thermal_emergency_poweroff(void)
msecs_to_jiffies(poweroff_delay_ms));
}
void thermal_zone_device_critical(struct thermal_zone_device *tz)
{
dev_emerg(&tz->device, "%s: critical temperature reached, "
"shutting down\n", tz->type);
mutex_lock(&poweroff_lock);
if (!power_off_triggered) {
/*
* Queue a backup emergency shutdown in the event of
* orderly_poweroff failure
*/
thermal_emergency_poweroff();
orderly_poweroff(true);
power_off_triggered = true;
}
mutex_unlock(&poweroff_lock);
}
EXPORT_SYMBOL(thermal_zone_device_critical);
static void handle_critical_trips(struct thermal_zone_device *tz,
int trip, enum thermal_trip_type trip_type)
{
@ -396,22 +415,10 @@ static void handle_critical_trips(struct thermal_zone_device *tz,
if (tz->ops->notify)
tz->ops->notify(tz, trip, trip_type);
if (trip_type == THERMAL_TRIP_CRITICAL) {
dev_emerg(&tz->device,
"critical temperature reached (%d C), shutting down\n",
tz->temperature / 1000);
mutex_lock(&poweroff_lock);
if (!power_off_triggered) {
/*
* Queue a backup emergency shutdown in the event of
* orderly_poweroff failure
*/
thermal_emergency_poweroff();
orderly_poweroff(true);
power_off_triggered = true;
}
mutex_unlock(&poweroff_lock);
}
if (trip_type == THERMAL_TRIP_HOT && tz->ops->hot)
tz->ops->hot(tz);
else if (trip_type == THERMAL_TRIP_CRITICAL)
tz->ops->critical(tz);
}
static void handle_thermal_trip(struct thermal_zone_device *tz, int trip)
@ -1336,6 +1343,10 @@ thermal_zone_device_register(const char *type, int trips, int mask,
tz->id = id;
strlcpy(tz->type, type, sizeof(tz->type));
if (!ops->critical)
ops->critical = thermal_zone_device_critical;
tz->ops = ops;
tz->tzp = tzp;
tz->device.class = &thermal_class;

3
include/linux/thermal.h
View File

@ -79,6 +79,8 @@ struct thermal_zone_device_ops {
enum thermal_trend *);
int (*notify) (struct thermal_zone_device *, int,
enum thermal_trip_type);
void (*hot)(struct thermal_zone_device *);
void (*critical)(struct thermal_zone_device *);
};
struct thermal_cooling_device_ops {
@ -399,6 +401,7 @@ void thermal_cdev_update(struct thermal_cooling_device *);
void thermal_notify_framework(struct thermal_zone_device *, int);
int thermal_zone_device_enable(struct thermal_zone_device *tz);
int thermal_zone_device_disable(struct thermal_zone_device *tz);
void thermal_zone_device_critical(struct thermal_zone_device *tz);
#else
static inline struct thermal_zone_device *thermal_zone_device_register(
const char *type, int trips, int mask, void *devdata,