This includes a placeholder nxp_authenticate_device() function if the
chip supports secure interface feature.

Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
---
 drivers/bluetooth/btnxpuart.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c
index d2c79c462ebb..3455460d30f5 100644
--- a/drivers/bluetooth/btnxpuart.c
+++ b/drivers/bluetooth/btnxpuart.c
@@ -1598,6 +1598,23 @@ static void nxp_get_fw_version(struct hci_dev *hdev)
 	kfree_skb(skb);
 }
 
+/* Secure Interface */
+static int nxp_authenticate_device(struct hci_dev *hdev)
+{
+	struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
+	int ret = 0;
+
+	/* TODO: Implement actual TLS handshake protocol
+	 * This will include:
+	 * 1. Crypto allocation (SHA256, ECDH-P256)
+	 * 2. Host/Device hello message exchange
+	 * 3. Master secret and traffic key derivation
+	 * 4. Proper error handling and cleanup
+	 */
+
+	return ret;
+}
+
 /* NXP protocol */
 static int nxp_setup(struct hci_dev *hdev)
 {
@@ -1629,6 +1646,12 @@ static int nxp_setup(struct hci_dev *hdev)
 
 	nxp_get_fw_version(hdev);
 
+	if (nxpdev->secure_interface) {
+		err = nxp_authenticate_device(hdev);
+		if (err)
+			return -EACCES;
+	}
+
 	ps_init(hdev);
 
 	if (test_and_clear_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state))
-- 
2.43.0