/*
 * 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='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='64a172d265643b345007ddaafcc523f6e5373b69'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-28 11:06:42 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-28 11:06:42 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=64a172d265643b345007ddaafcc523f6e5373b69'>64a172d265643b345007ddaafcc523f6e5373b69</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=64a172d265643b345007ddaafcc523f6e5373b69'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=64a172d265643b345007ddaafcc523f6e5373b69'>012cba95b06014e2a5d916ae3081401a0552077f</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=ef1dce990b06a3f5bf4f71100891686b5d3f7c7e'>ef1dce990b06a3f5bf4f71100891686b5d3f7c7e</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=64a172d265643b345007ddaafcc523f6e5373b69&amp;id2=ef1dce990b06a3f5bf4f71100891686b5d3f7c7e'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=606f42265d384b9149bfb953c5dfc6d4710fef4c'>606f42265d384b9149bfb953c5dfc6d4710fef4c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=64a172d265643b345007ddaafcc523f6e5373b69&amp;id2=606f42265d384b9149bfb953c5dfc6d4710fef4c'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux</div><div class='commit-msg'>Pull arm64 fix from Catalin Marinas:
 "Fix kernel panic on ACPI-based systems where CPU capacity description
  is not currently handled"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: skip register_cpufreq_notifier on ACPI-based systems
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=64a172d265643b345007ddaafcc523f6e5373b69'>Diffstat</a></div><table summary='diffstat' class='diffstat'>