NFC: Add HCI/SHDLC support to let driver check for tag presence

Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/net/nfc/hci/shdlc.c b/net/nfc/hci/shdlc.c
index 923bdf7c26d6..5665dc6d893a 100644
--- a/net/nfc/hci/shdlc.c
+++ b/net/nfc/hci/shdlc.c
@@ -816,6 +816,17 @@ static int nfc_shdlc_data_exchange(struct nfc_hci_dev *hdev,
         return -EPERM;
 }
 
+static int nfc_shdlc_check_presence(struct nfc_hci_dev *hdev,
+                                    struct nfc_target *target)
+{
+        struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
+
+        if (shdlc->ops->check_presence)
+                return shdlc->ops->check_presence(shdlc, target);
+
+        return 0;
+}
+
 static struct nfc_hci_ops shdlc_ops = {
         .open = nfc_shdlc_open,
         .close = nfc_shdlc_close,
@@ -825,6 +836,7 @@ static struct nfc_hci_ops shdlc_ops = {
         .target_from_gate = nfc_shdlc_target_from_gate,
         .complete_target_discovered = nfc_shdlc_complete_target_discovered,
         .data_exchange = nfc_shdlc_data_exchange,
+        .check_presence = nfc_shdlc_check_presence,
 };
 
 struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops,