Bluetooth: Add delayed init sequence support for UART controllers

This patch makes it possible to have UART drivers perform an internal
initialization before calling hci_register_dev. This allows moving a lot
of init code from user space (hciattach) to the kernel side, thereby
creating a more controlled/robust initialization process.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index aaf9d7de1b9f..fffa61ff5cb1 100644
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -47,6 +47,7 @@
 #define HCI_UART_RAW_DEVICE     0
 #define HCI_UART_RESET_ON_INIT  1
 #define HCI_UART_CREATE_AMP     2
+#define HCI_UART_INIT_PENDING   3
 
 struct hci_uart;
 
@@ -66,6 +67,8 @@ struct hci_uart {
         unsigned long           flags;
         unsigned long           hdev_flags;
 
+        struct work_struct      init_ready;
+
         struct hci_uart_proto   *proto;
         void                    *priv;
 
@@ -76,6 +79,7 @@ struct hci_uart {
 
 /* HCI_UART proto flag bits */
 #define HCI_UART_PROTO_SET      0
+#define HCI_UART_REGISTERED     1
 
 /* TX states  */
 #define HCI_UART_SENDING        1
@@ -84,6 +88,7 @@ struct hci_uart {
 int hci_uart_register_proto(struct hci_uart_proto *p);
 int hci_uart_unregister_proto(struct hci_uart_proto *p);
 int hci_uart_tx_wakeup(struct hci_uart *hu);
+int hci_uart_init_ready(struct hci_uart *hu);
 
 #ifdef CONFIG_BT_HCIUART_H4
 int h4_init(void);