Thermal: thermal zone governor fix
This patch does a cleanup about the thermal zone govenor, setting and make the following rule. 1. For thermal zone devices that are registered w/o tz->tzp, they can use the default thermal governor only. 2. For thermal zone devices w/ governor name specified in tz->tzp->governor_name, we will use the default govenor if the governor specified is not available at the moment, and update tz->governor when the matched governor is registered. This also fixes a problem that OF registered thermal zones are running with no governor. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Javi Merino <javi.merino@arm.com>
This commit is contained in:
parent
5ca0cce562
commit
f2234bcd03
|
@ -56,10 +56,15 @@ static LIST_HEAD(thermal_governor_list);
|
|||
static DEFINE_MUTEX(thermal_list_lock);
|
||||
static DEFINE_MUTEX(thermal_governor_lock);
|
||||
|
||||
static struct thermal_governor *def_governor;
|
||||
|
||||
static struct thermal_governor *__find_governor(const char *name)
|
||||
{
|
||||
struct thermal_governor *pos;
|
||||
|
||||
if (!name || !name[0])
|
||||
return def_governor;
|
||||
|
||||
list_for_each_entry(pos, &thermal_governor_list, governor_list)
|
||||
if (!strnicmp(name, pos->name, THERMAL_NAME_LENGTH))
|
||||
return pos;
|
||||
|
@ -82,17 +87,23 @@ int thermal_register_governor(struct thermal_governor *governor)
|
|||
if (__find_governor(governor->name) == NULL) {
|
||||
err = 0;
|
||||
list_add(&governor->governor_list, &thermal_governor_list);
|
||||
if (!def_governor && !strncmp(governor->name,
|
||||
DEFAULT_THERMAL_GOVERNOR, THERMAL_NAME_LENGTH))
|
||||
def_governor = governor;
|
||||
}
|
||||
|
||||
mutex_lock(&thermal_list_lock);
|
||||
|
||||
list_for_each_entry(pos, &thermal_tz_list, node) {
|
||||
/*
|
||||
* only thermal zones with specified tz->tzp->governor_name
|
||||
* may run with tz->govenor unset
|
||||
*/
|
||||
if (pos->governor)
|
||||
continue;
|
||||
if (pos->tzp)
|
||||
|
||||
name = pos->tzp->governor_name;
|
||||
else
|
||||
name = DEFAULT_THERMAL_GOVERNOR;
|
||||
|
||||
if (!strnicmp(name, governor->name, THERMAL_NAME_LENGTH))
|
||||
pos->governor = governor;
|
||||
}
|
||||
|
@ -342,8 +353,8 @@ static void monitor_thermal_zone(struct thermal_zone_device *tz)
|
|||
static void handle_non_critical_trips(struct thermal_zone_device *tz,
|
||||
int trip, enum thermal_trip_type trip_type)
|
||||
{
|
||||
if (tz->governor)
|
||||
tz->governor->throttle(tz, trip);
|
||||
tz->governor ? tz->governor->throttle(tz, trip) :
|
||||
def_governor->throttle(tz, trip);
|
||||
}
|
||||
|
||||
static void handle_critical_trips(struct thermal_zone_device *tz,
|
||||
|
@ -1533,7 +1544,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
|
|||
if (tz->tzp)
|
||||
tz->governor = __find_governor(tz->tzp->governor_name);
|
||||
else
|
||||
tz->governor = __find_governor(DEFAULT_THERMAL_GOVERNOR);
|
||||
tz->governor = def_governor;
|
||||
|
||||
mutex_unlock(&thermal_governor_lock);
|
||||
|
||||
|
|
Loading…
Reference in New Issue