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https://github.com/edk2-porting/linux-next.git
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2282e125a4
Given that activating a trigger can fail, let the callback return an indication. This prevents to have a trigger active according to the "trigger" sysfs attribute but not functional. All users are changed accordingly to return 0 for now. There is no intended change in behaviour. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
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* Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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_trigger_event(led_cdev->trigger, 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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