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thermal: core: create tz->device.groups dynamically

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This is a patch to allow adding groups created dynamically. For now we
create only the existing group. However, this is a preparation to allow
creating trip groups, which are determined only when the number of trips
are known at runtime.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Eduardo Valentin 2016-11-07 21:08:51 -08:00 committed by Zhang Rui
parent 0a9de81907
commit e161aefb9a
1 changed files with 22 additions and 3 deletions
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25
drivers/thermal/thermal_core.c
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@ -1236,7 +1236,7 @@ static const struct attribute_group *thermal_zone_attribute_groups[] = {
&thermal_zone_attribute_group,
&thermal_zone_mode_attribute_group,
&thermal_zone_passive_attribute_group,
NULL
/* This is not NULL terminated as we create the group dynamically */
};
/**
@ -1347,6 +1347,25 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
kfree(tz->trip_hyst_attrs);
}
static int thermal_zone_create_device_groups(struct thermal_zone_device *tz)
{
const struct attribute_group **groups;
int i, size;
size = ARRAY_SIZE(thermal_zone_attribute_groups) + 1;
/* This also takes care of API requirement to be NULL terminated */
groups = kcalloc(size, sizeof(*groups), GFP_KERNEL);
if (!groups)
return -ENOMEM;
for (i = 0; i < size - 1; i++)
groups[i] = thermal_zone_attribute_groups[i];
tz->device.groups = groups;
return 0;
}
/* sys I/F for cooling device */
#define to_cooling_device(_dev) \
container_of(_dev, struct thermal_cooling_device, device)
@ -1982,7 +2001,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
tz->polling_delay = polling_delay;
/* Add nodes that are always present via .groups */
tz->device.groups = thermal_zone_attribute_groups;
thermal_zone_create_device_groups(tz);
/* A new thermal zone needs to be updated anyway. */
atomic_set(&tz->need_update, 1);
@ -2111,7 +2130,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
idr_destroy(&tz->idr);
mutex_destroy(&tz->lock);
device_unregister(&tz->device);
return;
kfree(tz->device.groups);
}
EXPORT_SYMBOL_GPL(thermal_zone_device_unregister);