/*
 * 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/commit/?id=7a43906f5cbfb74712af168988455e350707e310'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=7a43906f5cbfb74712af168988455e350707e310'>Documentation</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='7a43906f5cbfb74712af168988455e350707e310'/><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>Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;</td><td class='right'>2016-11-21 18:08:05 +1100</td></tr>
<tr><th>committer</th><td>Michael Ellerman &lt;mpe@ellerman.id.au&gt;</td><td class='right'>2016-11-22 14:53:27 +1100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=7a43906f5cbfb74712af168988455e350707e310'>7a43906f5cbfb74712af168988455e350707e310</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation?id=7a43906f5cbfb74712af168988455e350707e310'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=7a43906f5cbfb74712af168988455e350707e310'>2bd007a322f318e7a1903941b2bfd5d8251bfc93</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation?id=7a43906f5cbfb74712af168988455e350707e310'>Documentation</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?id=cac4a185405d4415eca269cae976438b44a37ae0'>cac4a185405d4415eca269cae976438b44a37ae0</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation?id=7a43906f5cbfb74712af168988455e350707e310&amp;id2=cac4a185405d4415eca269cae976438b44a37ae0'>diff</a>)</td></tr></table>
<div class='commit-subject'>powerpc: Set missing wakeup bit in LPCR on POWER9</div><div class='commit-msg'>There is a new bit, LPCR_PECE_HVEE (Hypervisor Virtualization Exit
Enable), which controls wakeup from STOP states on Hypervisor
Virtualization Interrupts (which happen to also be all external
interrupts in host or bare metal mode).

It needs to be set or we will miss wakeups.

Fixes: 9baaef0a22c8 ("powerpc/irq: Add support for HV virtualization interrupts")
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: Benjamin Herrenschmidt &lt;benh@kernel.crashing.org&gt;
[mpe: Rename it to HVEE to match the name in the ISA]
Signed-off-by: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=7a43906f5cbfb74712af168988455e350707e310'>Diffstat</a> (limited to 'Documentation')</div><table summary='diffstat' class='diffstat'>