bts: Add some simple dependency between different BTS
E.g. for the sysmoBTS2050 we have the requirement that the first
board connects before the second due clocking. The easiest point
to enforce this is the BSC. Add a simple bitmask based system to
allow to express dependencies for IP based systems.
diff --git a/openbsc/src/libbsc/bts_ipaccess_nanobts.c b/openbsc/src/libbsc/bts_ipaccess_nanobts.c
index 9fa03bf..825a22e 100644
--- a/openbsc/src/libbsc/bts_ipaccess_nanobts.c
+++ b/openbsc/src/libbsc/bts_ipaccess_nanobts.c
@@ -590,6 +590,13 @@
/* remove old OML signal link for this BTS. */
ipaccess_drop_oml(bts);
+ if (!bts_depend_check(bts)) {
+ LOGP(DLINP, LOGL_NOTICE,
+ "Dependency not full-filled for %u/%u/%u\n",
+ dev->site_id, dev->bts_id, dev->trx_id);
+ return NULL;
+ }
+
/* create new OML link. */
sign_link = bts->oml_link =
e1inp_sign_link_create(&line->ts[E1INP_SIGN_OML - 1],