Commit e64c97b5 authored by Marcel Holtmann's avatar Marcel Holtmann
Browse files

Bluetooth: Add combined LED trigger for controller power 



Instead of just having a LED trigger for power on a specific controller,
this adds the LED trigger "bluetooth-power" that combines the power
states of all controllers into a single trigger. This simplifies the
trigger selection and also supports multiple controllers per host
system via a single LED.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
parent 53f863a6

net/bluetooth/af_bluetooth.c

+5 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <net/bluetooth/bluetooth.h>

#include <linux/proc_fs.h>



#include "leds.h"

#include "selftest.h"



/* Bluetooth sockets */
@@ -726,6 +727,8 @@ static int __init bt_init(void) 


	bt_debugfs = debugfs_create_dir("bluetooth", NULL);



	bt_leds_init();



	err = bt_sysfs_init();

	if (err < 0)

		return err;
@@ -785,6 +788,8 @@ static void __exit bt_exit(void) 


	bt_sysfs_cleanup();



	bt_leds_cleanup();



	debugfs_remove_recursive(bt_debugfs);

}

net/bluetooth/leds.c

+27 −0
Original line number Diff line number Diff line
@@ -11,6 +11,8 @@ 


#include "leds.h"



DEFINE_LED_TRIGGER(bt_power_led_trigger);



struct hci_basic_led_trigger {

	struct led_trigger	led_trigger;

	struct hci_dev		*hdev;
@@ -24,6 +26,21 @@ 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)
@@ -72,3 +89,13 @@ 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);

}

net/bluetooth/leds.h

+10 −0
Original line number Diff line number Diff line
@@ -7,10 +7,20 @@ 
 */



#if IS_ENABLED(CONFIG_BT_LEDS)



void hci_leds_update_powered(struct hci_dev *hdev, bool enabled);

void hci_leds_init(struct hci_dev *hdev);



void bt_leds_init(void);

void bt_leds_cleanup(void);



#else



static inline void hci_leds_update_powered(struct hci_dev *hdev,

					   bool enabled) {}

static inline void hci_leds_init(struct hci_dev *hdev) {}



static inline void bt_leds_init(void) {}

static inline void bt_leds_cleanup(void) {}



#endif

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