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A LED trigger's activate() callback gets called when the LED trigger gets activated for a specific LED, so that the trigger code can ensure the LED state matches the current state of the trigger condition (LED_FULL when HCI_UP is set in this case). led_trigger_event() is intended for trigger condition state changes and iterates over _all_ LEDs which are controlled by this trigger changing the brightness of each of them. In the activate() case only the brightness of the LED which is being activated needs to change and that LED is passed as an argument to activate(), switch to led_set_brightness() to only change the brightness of the LED being activated. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com>
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*/
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include "leds.h"
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DEFINE_LED_TRIGGER(bt_power_led_trigger);
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struct hci_basic_led_trigger {
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struct led_trigger led_trigger;
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struct hci_dev *hdev;
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};
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#define to_hci_basic_led_trigger(arg) container_of(arg, \
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struct hci_basic_led_trigger, led_trigger)
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void hci_leds_update_powered(struct hci_dev *hdev, bool enabled)
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{
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if (hdev->power_led)
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led_trigger_event(hdev->power_led,
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enabled ? LED_FULL : LED_OFF);
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if (!enabled) {
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struct hci_dev *d;
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read_lock(&hci_dev_list_lock);
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list_for_each_entry(d, &hci_dev_list, list) {
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if (test_bit(HCI_UP, &d->flags))
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enabled = true;
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}
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read_unlock(&hci_dev_list_lock);
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}
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led_trigger_event(bt_power_led_trigger, enabled ? LED_FULL : LED_OFF);
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}
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static int power_activate(struct led_classdev *led_cdev)
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{
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struct hci_basic_led_trigger *htrig;
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bool powered;
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htrig = to_hci_basic_led_trigger(led_cdev->trigger);
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powered = test_bit(HCI_UP, &htrig->hdev->flags);
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led_set_brightness(led_cdev, powered ? LED_FULL : LED_OFF);
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return 0;
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}
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static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
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int (*activate)(struct led_classdev *led_cdev),
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const char *name)
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{
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struct hci_basic_led_trigger *htrig;
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htrig = devm_kzalloc(&hdev->dev, sizeof(*htrig), GFP_KERNEL);
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if (!htrig)
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return NULL;
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htrig->hdev = hdev;
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htrig->led_trigger.activate = activate;
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htrig->led_trigger.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
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"%s-%s", hdev->name,
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name);
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if (!htrig->led_trigger.name)
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goto err_alloc;
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if (devm_led_trigger_register(&hdev->dev, &htrig->led_trigger))
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goto err_register;
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return &htrig->led_trigger;
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err_register:
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devm_kfree(&hdev->dev, (void *)htrig->led_trigger.name);
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err_alloc:
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devm_kfree(&hdev->dev, htrig);
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return NULL;
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}
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void hci_leds_init(struct hci_dev *hdev)
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{
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/* initialize power_led */
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hdev->power_led = led_allocate_basic(hdev, power_activate, "power");
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}
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void bt_leds_init(void)
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{
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led_trigger_register_simple("bluetooth-power", &bt_power_led_trigger);
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}
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void bt_leds_cleanup(void)
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{
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led_trigger_unregister_simple(bt_power_led_trigger);
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}
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