Bluetooth: add LED trigger for indicating HCI is powered up

Add support for LED triggers to the Bluetooth subsystem and add kernel
config symbol BT_LEDS for it.

For now one trigger for indicating "HCI is powered up" is supported.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 883c821a9e78..88f1ef3589d8 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -40,6 +40,7 @@
 #include "hci_request.h"
 #include "hci_debugfs.h"
 #include "smp.h"
+#include "leds.h"
 
 static void hci_rx_work(struct work_struct *work);
 static void hci_cmd_work(struct work_struct *work);
@@ -1395,6 +1396,7 @@ static int hci_dev_do_open(struct hci_dev *hdev)
                 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
                 set_bit(HCI_UP, &hdev->flags);
                 hci_sock_dev_event(hdev, HCI_DEV_UP);
+                hci_leds_update_powered(hdev, true);
                 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
                     !hci_dev_test_flag(hdev, HCI_CONFIG) &&
                     !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
@@ -1532,6 +1534,8 @@ int hci_dev_do_close(struct hci_dev *hdev)
                 return 0;
         }
 
+        hci_leds_update_powered(hdev, false);
+
         /* Flush RX and TX works */
         flush_work(&hdev->tx_work);
         flush_work(&hdev->rx_work);
@@ -3067,6 +3071,8 @@ int hci_register_dev(struct hci_dev *hdev)
         if (error < 0)
                 goto err_wqueue;
 
+        hci_leds_init(hdev);
+
         hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
                                     RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
                                     hdev);
@@ -3128,6 +3134,8 @@ void hci_unregister_dev(struct hci_dev *hdev)
 
         id = hdev->id;
 
+        hci_leds_exit(hdev);
+
         write_lock(&hci_dev_list_lock);
         list_del(&hdev->list);
         write_unlock(&hci_dev_list_lock);