/*
 * 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 void 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);
}

static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,
			void (*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);
}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=8e92ab3a426e04dc355b196e3b4474f633025a3b'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?id=8e92ab3a426e04dc355b196e3b4474f633025a3b'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net?id=8e92ab3a426e04dc355b196e3b4474f633025a3b'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net/ipv6.h?id=8e92ab3a426e04dc355b196e3b4474f633025a3b'>ipv6.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/net/ipv6.h?id=8e92ab3a426e04dc355b196e3b4474f633025a3b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
<tr><td><span title='2017-01-31 13:16:59 -0500'>2017-01-31</span></td><td><a href='/cgit.cgi/linux/net-next.git/commit/include/net/ipv6.h?id=90427ef5d2a4b9a24079889bf16afdcdaebc4240'>ipv6: fix flow labels when the traffic class is non-0</a></td><td>Dimitris Michailidis</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+5</span></td></tr>