// SPDX-License-Identifier: GPL-2.0-only/* * Copyright 2015, Heiner Kallweit <hkallweit1@gmail.com> */ #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 int 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_set_brightness(led_cdev, powered ? LED_FULL : LED_OFF); 	return 0;} static struct led_trigger *led_allocate_basic(struct hci_dev *hdev,			int (*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);}