Belatedly add 2 entries relating to the introduction of scc(4) and

the overhaul of puc(4). On sparc64 people may end up without serial
console if they upgrade without adding scc(4) to their kernel
configuration file.

1 files changed, 15 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index 75f8a5d..113aebc 100644
--- a/UPDATING
+++ b/UPDATING
@@ -21,6 +21,21 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 7.x IS SLOW:
 	developers choose to disable these features on build machines
 	to maximize performance.
 
+20060428:
+	The puc(4) driver has been overhauled. The ebus(4) and sbus(4)
+	attachments have been removed. Make sure to configure scc(4)
+	on sparc64. Note also that by default puc(4) will use uart(4)
+	and not sio(4) for serial ports because interrupt handling has
+	been optimized for multi-port serial cards and only uart(4)
+	implements the interface to support it.
+
+20060330:
+	The scc(4) driver replaces puc(4) for Serial Communications
+	Controllers (SCCs) like the Siemens SAB82532 and the Zilog
+	Z8530. On sparc64, it is advised to add scc(4) to the kernel
+	configuration to make sure that the serial ports remain
+	functional.
+
 20060317:
 	Most world/kernel related NO_* build options changed names.
 	New knobs have common prefixes WITHOUT_*/WITH_* (modelled