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Diffstat (limited to 'arch/powerpc/platforms/powermac/udbg_scc.c')
-rw-r--r--arch/powerpc/platforms/powermac/udbg_scc.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powermac/udbg_scc.c b/arch/powerpc/platforms/powermac/udbg_scc.c
index 47de4d3fc16..572771fd846 100644
--- a/arch/powerpc/platforms/powermac/udbg_scc.c
+++ b/arch/powerpc/platforms/powermac/udbg_scc.c
@@ -125,13 +125,23 @@ void udbg_scc_init(int force_scc)
out_8(sccc, 0xc0);
/* If SCC was the OF output port, read the BRG value, else
- * Setup for 57600 8N1
+ * Setup for 38400 or 57600 8N1 depending on the machine
*/
if (ch_def != NULL) {
out_8(sccc, 13);
scc_inittab[1] = in_8(sccc);
out_8(sccc, 12);
scc_inittab[3] = in_8(sccc);
+ } else if (machine_is_compatible("RackMac1,1")
+ || machine_is_compatible("RackMac1,2")
+ || machine_is_compatible("MacRISC4")) {
+ /* Xserves and G5s default to 57600 */
+ scc_inittab[1] = 0;
+ scc_inittab[3] = 0;
+ } else {
+ /* Others default to 38400 */
+ scc_inittab[1] = 0;
+ scc_inittab[3] = 1;
}
for (i = 0; i < sizeof(scc_inittab); ++i)