mac80211: Add radio led trigger

Some devices have a seperate LED which indicates if the radio is
enabled or not. This adds a LED trigger to mac80211 where drivers
can hook into when they are interested in radio status changes.

v2: Check hw.conf.radio_enabled when calling start().

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 35 insertions, 0 deletions

diff --git a/net/mac80211/ieee80211_led.c b/net/mac80211/ieee80211_led.c
index 4cf89af9d100..f401484ab6d7 100644
--- a/net/mac80211/ieee80211_led.c
+++ b/net/mac80211/ieee80211_led.c
@@ -43,6 +43,16 @@ void ieee80211_led_assoc(struct ieee80211_local *local, bool associated)
                 led_trigger_event(local->assoc_led, LED_OFF);
 }
 
+void ieee80211_led_radio(struct ieee80211_local *local, bool enabled)
+{
+        if (unlikely(!local->radio_led))
+                return;
+        if (enabled)
+                led_trigger_event(local->radio_led, LED_FULL);
+        else
+                led_trigger_event(local->radio_led, LED_OFF);
+}
+
 void ieee80211_led_init(struct ieee80211_local *local)
 {
         local->rx_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
@@ -77,10 +87,25 @@ void ieee80211_led_init(struct ieee80211_local *local)
                         local->assoc_led = NULL;
                 }
         }
+
+        local->radio_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
+        if (local->radio_led) {
+                snprintf(local->radio_led_name, sizeof(local->radio_led_name),
+                         "%sradio", wiphy_name(local->hw.wiphy));
+                local->radio_led->name = local->radio_led_name;
+                if (led_trigger_register(local->radio_led)) {
+                        kfree(local->radio_led);
+                        local->radio_led = NULL;
+                }
+        }
 }
 
 void ieee80211_led_exit(struct ieee80211_local *local)
 {
+        if (local->radio_led) {
+                led_trigger_unregister(local->radio_led);
+                kfree(local->radio_led);
+        }
         if (local->assoc_led) {
                 led_trigger_unregister(local->assoc_led);
                 kfree(local->assoc_led);
@@ -95,6 +120,16 @@ void ieee80211_led_exit(struct ieee80211_local *local)
         }
 }
 
+char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
+{
+        struct ieee80211_local *local = hw_to_local(hw);
+
+        if (local->radio_led)
+                return local->radio_led_name;
+        return NULL;
+}
+EXPORT_SYMBOL(__ieee80211_get_radio_led_name);
+
 char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
 {
         struct ieee80211_local *local = hw_to_local(hw);