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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: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2016-07-21 14:12:41 +02:00
parent 53f863a669
commit e64c97b53b
3 changed files with 42 additions and 0 deletions
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5
net/bluetooth/af_bluetooth.c
View File

@ -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);
}

27
net/bluetooth/leds.c
View File

@ -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);
}

10
net/bluetooth/leds.h
View File

@ -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