NFC: Add device powered netlink attribute

For user space to know if a device is up or down.

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

2 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/nfc.h b/include/linux/nfc.h
index b4999abcb2a2..39c1fcf089c0 100644
--- a/include/linux/nfc.h
+++ b/include/linux/nfc.h
@@ -107,6 +107,7 @@ enum nfc_attrs {
         NFC_ATTR_TARGET_SENSF_RES,
         NFC_ATTR_COMM_MODE,
         NFC_ATTR_RF_MODE,
+        NFC_ATTR_DEVICE_POWERED,
 /* private: internal use only */
         __NFC_ATTR_AFTER_LAST
 };
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 07f0348aabf5..a1388e4efd6f 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -48,6 +48,7 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
         [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
         [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
         [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
+        [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
 };
 
 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
@@ -200,6 +201,7 @@ int nfc_genl_device_added(struct nfc_dev *dev)
         NLA_PUT_STRING(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev));
         NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx);
         NLA_PUT_U32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols);
+        NLA_PUT_U8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up);
 
         genlmsg_end(msg, hdr);
 
@@ -261,6 +263,7 @@ static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
         NLA_PUT_STRING(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev));
         NLA_PUT_U32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx);
         NLA_PUT_U32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols);
+        NLA_PUT_U8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up);
 
         return genlmsg_end(msg, hdr);