as for 281

.gitignore

@@ -0,0 +1,27 @@
+# First, ignore everything
+*
+# Now, whitelist anything that's a directory
+!*/
+# And all the file types you're interested in
+!.gitignore
+!.githooks/post-merge
+!.githooks/post-checkout
+!**/.gitignore
+!**/.githooks/post-merge
+!**/.githooks/post-checkout
+
+## Except
+!etc/atb/*
+!etc/psa_config/*
+!etc/psa_update/*
+!etc/psa_tariff/*
+!etc/dc/*.hex
+!etc/dc/*.bin
+!*/etc/*.ini
+!*/etc/atb/*
+!*/etc/psa_config/*
+!*/etc/psa_update/*
+!*/etc/psa_tariff/*
+!*/etc/dc/*.hex
+!*/etc/dc/*.bin
+