static int
acpi_thermal_remove (
struct acpi_device *device,
int type)
{
acpi_status status = AE_OK;
struct acpi_thermal *tz = NULL;
ACPI_FUNCTION_TRACE("acpi_thermal_remove");
if (!device || !acpi_driver_data(device))
return_VALUE(-EINVAL);
tz = (struct acpi_thermal *) acpi_driver_data(device);
/* avoid timer adding new defer task */
tz->zombie = 1;
/* wait for running timer (on other CPUs) finish */
delete_timer( tz->timer );
/* synchronize deferred task */
acpi_os_wait_events_complete(NULL);
status = acpi_remove_notify_handler(tz->handle,
ACPI_DEVICE_NOTIFY, acpi_thermal_notify);
if (ACPI_FAILURE(status))
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Error removing notify handler\n"));
/* Terminate policy */
if (tz->trips.passive.flags.valid
&& tz->trips.passive.flags.enabled) {
tz->trips.passive.flags.enabled = 0;
acpi_thermal_passive(tz);
}
if (tz->trips.active[0].flags.valid
&& tz->trips.active[0].flags.enabled) {
tz->trips.active[0].flags.enabled = 0;
acpi_thermal_active(tz);
}
kfree(tz);
return_VALUE(0);
}
static int
acpi_thermal_remove (
struct acpi_device *device,
int type)
{
acpi_status status = AE_OK;
struct acpi_thermal *tz = NULL;
ACPI_FUNCTION_TRACE("acpi_thermal_remove");
if (!device || !acpi_driver_data(device))
return_VALUE(-EINVAL);
tz = (struct acpi_thermal *) acpi_driver_data(device);
if (timer_pending(&(tz->timer)))
del_timer(&(tz->timer));
status = acpi_remove_notify_handler(tz->handle,
ACPI_DEVICE_NOTIFY, acpi_thermal_notify);
if (ACPI_FAILURE(status))
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Error removing notify handler\n"));
/* Terminate policy */
if (tz->trips.passive.flags.valid
&& tz->trips.passive.flags.enabled) {
tz->trips.passive.flags.enabled = 0;
acpi_thermal_passive(tz);
}
if (tz->trips.active[0].flags.valid
&& tz->trips.active[0].flags.enabled) {
tz->trips.active[0].flags.enabled = 0;
acpi_thermal_active(tz);
}
acpi_thermal_remove_fs(device);
return_VALUE(0);
}
static void
acpi_thermal_check (
void *data)
{
int result = 0;
struct acpi_thermal *tz = (struct acpi_thermal *) data;
unsigned long sleep_time = 0;
int i = 0;
struct acpi_thermal_state state = tz->state;
ACPI_FUNCTION_TRACE("acpi_thermal_check");
if (!tz) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid (NULL) context.\n"));
return_VOID;
}
result = acpi_thermal_get_temperature(tz);
if (result)
return_VOID;
memset(&tz->state, 0, sizeof(tz->state));
/*
* Check Trip Points
* -----------------
* Compare the current temperature to the trip point values to see
* if we've entered one of the thermal policy states. Note that
* this function determines when a state is entered, but the
* individual policy decides when it is exited (e.g. hysteresis).
*/
if (tz->trips.critical.flags.valid)
state.critical |= (tz->temperature >= tz->trips.critical.temperature);
if (tz->trips.hot.flags.valid)
state.hot |= (tz->temperature >= tz->trips.hot.temperature);
if (tz->trips.passive.flags.valid)
state.passive |= (tz->temperature >= tz->trips.passive.temperature);
for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++)
if (tz->trips.active[i].flags.valid)
state.active |= (tz->temperature >= tz->trips.active[i].temperature);
/*
* Invoke Policy
* -------------
* Separated from the above check to allow individual policy to
* determine when to exit a given state.
*/
if (state.critical)
acpi_thermal_critical(tz);
if (state.hot)
acpi_thermal_hot(tz);
if (state.passive)
acpi_thermal_passive(tz);
if (state.active)
acpi_thermal_active(tz);
/*
* Calculate State
* ---------------
* Again, separated from the above two to allow independent policy
* decisions.
*/
if (tz->trips.critical.flags.enabled)
tz->state.critical = 1;
if (tz->trips.hot.flags.enabled)
tz->state.hot = 1;
if (tz->trips.passive.flags.enabled)
tz->state.passive = 1;
for (i=0; i<ACPI_THERMAL_MAX_ACTIVE; i++)
if (tz->trips.active[i].flags.enabled)
tz->state.active = 1;
/*
* Calculate Sleep Time
* --------------------
* If we're in the passive state, use _TSP's value. Otherwise
* use the default polling frequency (e.g. _TZP). If no polling
* frequency is specified then we'll wait forever (at least until
* a thermal event occurs). Note that _TSP and _TZD values are
* given in 1/10th seconds (we must covert to milliseconds).
*/
if (tz->state.passive)
sleep_time = tz->trips.passive.tsp * 100;
else if (tz->polling_frequency > 0)
sleep_time = tz->polling_frequency * 100;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n",
tz->name, tz->temperature, sleep_time));
/*
* Schedule Next Poll
* ------------------
*/
if (!sleep_time) {
if (timer_pending(&(tz->timer)))
del_timer(&(tz->timer));
}
else {
if (timer_pending(&(tz->timer)))
mod_timer(&(tz->timer), (HZ * sleep_time) / 1000);
else {
tz->timer.data = (unsigned long) tz;
tz->timer.function = acpi_thermal_run;
tz->timer.expires = jiffies + (HZ * sleep_time) / 1000;
add_timer(&(tz->timer));
}
}
return_VOID;
}
