v4.19.13 snapshot.
diff --git a/net/bluetooth/leds.c b/net/bluetooth/leds.c
new file mode 100644
index 0000000..6d59a50
--- /dev/null
+++ b/net/bluetooth/leds.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "leds.h"
+
+DEFINE_LED_TRIGGER(bt_power_led_trigger);
+
+struct hci_basic_led_trigger {
+ struct led_trigger led_trigger;
+ struct hci_dev *hdev;
+};
+
+#define to_hci_basic_led_trigger(arg) container_of(arg, \
+ struct hci_basic_led_trigger, led_trigger)
+
+void hci_leds_update_powered(struct hci_dev *hdev, bool enabled)
+{
+ if (hdev->power_led)
+ led_trigger_event(hdev->power_led,
+ enabled ? LED_FULL : LED_OFF);
+
+ if (!enabled) {
+ struct hci_dev *d;
+
+ read_lock(&hci_dev_list_lock);
+
+ list_for_each_entry(d, &hci_dev_list, list) {
+ if (test_bit(HCI_UP, &d->flags))
+ enabled = true;
+ }
+
+ read_unlock(&hci_dev_list_lock);
+ }
+
+ led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF);
+}
+
+static int power_activate(struct led_classdev *led_cdev)
+{
+ struct hci_basic_led_trigger *htrig;
+ bool powered;
+
+ htrig = to_hci_basic_led_trigger(led_cdev->trigger);
+ powered = test_bit(HCI_UP, &htrig->hdev->flags);
+
+ led_trigger_event(led_cdev->trigger, powered ? LED_FULL : LED_OFF);
+
+ return 0;
+}
+
+static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
+ int (*activate)(struct led_classdev *led_cdev),
+ const char *name)
+{
+ struct hci_basic_led_trigger *htrig;
+
+ htrig = devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL);
+ if (!htrig)
+ return NULL;
+
+ htrig->hdev = hdev;
+ htrig->led_trigger.activate = activate;
+ htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
+ "%s-%s", hdev->name,
+ name);
+ if (!htrig->led_trigger.name)
+ goto err_alloc;
+
+ if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger))
+ goto err_register;
+
+ return &htrig->led_trigger;
+
+err_register:
+ devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name);
+err_alloc:
+ devm_kfree(&hdev->dev, htrig);
+ return NULL;
+}
+
+void hci_leds_init(struct hci_dev *hdev)
+{
+ /* initialize power_led */
+ hdev->power_led = led_allocate_basic(hdev, power_activate, "power");
+}
+
+void bt_leds_init(void)
+{
+ led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger);
+}
+
+void bt_leds_cleanup(void)
+{
+ led_trigger_unregister_simple(bt_power_led_trigger);
+}