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rfkill: Create rfkill-none LED trigger 

Creates a new trigger rfkill-none, as a complement to rfkill-any, which
drives LEDs when any radio is enabled. The new trigger is meant to turn
a LED ON whenever all radios are OFF, and turn it OFF otherwise.

Signed-off-by: João Paulo Rechi Vita <jprvita@endlessm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
João Paulo Rechi Vita 2018-05-22 14:29:32 -07:00 committed by Johannes Berg
parent d874cd7430
commit 232aa23ec3
1 changed files with 20 additions and 7 deletions
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27
net/rfkill/core.c
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@ -178,6 +178,7 @@ static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
}
static struct led_trigger rfkill_any_led_trigger;
static struct led_trigger rfkill_none_led_trigger;
static struct work_struct rfkill_global_led_trigger_work;
static void rfkill_global_led_trigger_worker(struct work_struct *work)
@ -195,6 +196,8 @@ static void rfkill_global_led_trigger_worker(struct work_struct *work)
mutex_unlock(&rfkill_global_mutex);
led_trigger_event(&rfkill_any_led_trigger, brightness);
led_trigger_event(&rfkill_none_led_trigger,
brightness == LED_OFF ? LED_FULL : LED_OFF);
}
static void rfkill_global_led_trigger_event(void)
@ -202,22 +205,32 @@ static void rfkill_global_led_trigger_event(void)
schedule_work(&rfkill_global_led_trigger_work);
}
static void rfkill_global_led_trigger_activate(struct led_classdev *led_cdev)
{
rfkill_global_led_trigger_event();
}
static int rfkill_global_led_trigger_register(void)
{
int ret;
INIT_WORK(&rfkill_global_led_trigger_work,
rfkill_global_led_trigger_worker);
rfkill_any_led_trigger.name = "rfkill-any";
rfkill_any_led_trigger.activate = rfkill_global_led_trigger_activate;
return led_trigger_register(&rfkill_any_led_trigger);
ret = led_trigger_register(&rfkill_any_led_trigger);
if (ret)
return ret;
rfkill_none_led_trigger.name = "rfkill-none";
ret = led_trigger_register(&rfkill_none_led_trigger);
if (ret)
led_trigger_unregister(&rfkill_any_led_trigger);
else
/* Delay activation until all global triggers are registered */
rfkill_global_led_trigger_event();
return ret;
}
static void rfkill_global_led_trigger_unregister(void)
{
led_trigger_unregister(&rfkill_none_led_trigger);
led_trigger_unregister(&rfkill_any_led_trigger);
cancel_work_sync(&rfkill_global_led_trigger_work);
}