doxygen: Add documentation for Abis OML
diff --git a/include/osmocom/gsm/abis_nm.h b/include/osmocom/gsm/abis_nm.h
index 3f5335e..5b5bff0 100644
--- a/include/osmocom/gsm/abis_nm.h
+++ b/include/osmocom/gsm/abis_nm.h
@@ -1,10 +1,16 @@
#ifndef _OSMO_GSM_ABIS_NM_H
#define _OSMO_GSM_ABIS_NM_H
+/*! \defgroup oml A-bis OML
+ * @{
+ */
+
#include <osmocom/gsm/tlv.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/gsm/protocol/gsm_12_21.h>
+/*! \file abis_nm.h */
+
enum abis_nm_msgtype;
enum gsm_phys_chan_config;
@@ -28,4 +34,7 @@
int abis_nm_chcomb4pchan(enum gsm_phys_chan_config pchan);
enum abis_nm_chan_comb abis_nm_pchan4chcomb(uint8_t chcomb);
+
+/*! }@ */
+
#endif /* _OSMO_GSM_ABIS_NM_H */