/* Initialize device */
static int hci_uart_open(struct hci_dev *hdev)
{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+ int err;
+
BT_DBG("%s %p", hdev->name, hdev);
+ /* When Quirk HCI_QUIRK_NON_PERSISTENT_SETUP is set by
+ * driver, BT SoC is completely turned OFF during
+ * BT OFF. Upon next BT ON UART port should be opened.
+ */
+ if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) {
+ err = serdev_device_open(hu->serdev);
+ if (err)
+ return err;
+ set_bit(HCI_UART_PROTO_READY, &hu->flags);
+ }
+
/* Undo clearing this from hci_uart_close() */
hdev->flush = hci_uart_flush;
/* Close device */
static int hci_uart_close(struct hci_dev *hdev)
{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+
BT_DBG("hdev %p", hdev);
+ if (!test_bit(HCI_UART_PROTO_READY, &hu->flags))
+ return 0;
+
hci_uart_flush(hdev);
hdev->flush = NULL;
+ /* When QUIRK HCI_QUIRK_NON_PERSISTENT_SETUP is set by driver,
+ * BT SOC is completely powered OFF during BT OFF, holding port
+ * open may drain the battery.
+ */
+ if (test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
+ clear_bit(HCI_UART_PROTO_READY, &hu->flags);
+ serdev_device_close(hu->serdev);
+ }
+
return 0;
}
{
struct hci_dev *hdev = hu->hdev;
- clear_bit(HCI_UART_PROTO_READY, &hu->flags);
-
cancel_work_sync(&hu->init_ready);
if (test_bit(HCI_UART_REGISTERED, &hu->flags))
hci_unregister_dev(hdev);
cancel_work_sync(&hu->write_work);
hu->proto->close(hu);
- serdev_device_close(hu->serdev);
+
+ if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) {
+ clear_bit(HCI_UART_PROTO_READY, &hu->flags);
+ serdev_device_close(hu->serdev);
+ }
}
EXPORT_SYMBOL_GPL(hci_uart_unregister_device);