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-rw-r--r--cpu/mpc83xx/cpu_init.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/cpu/mpc83xx/cpu_init.c b/cpu/mpc83xx/cpu_init.c
index fb184d8..67c9e57 100644
--- a/cpu/mpc83xx/cpu_init.c
+++ b/cpu/mpc83xx/cpu_init.c
@@ -181,8 +181,13 @@ void cpu_init_f (volatile immap_t * im)
/* System General Purpose Register */
#ifdef CFG_SICRH
+#if defined(CONFIG_MPC834X) || defined(CONFIG_MPC8313)
+ /* regarding to MPC34x manual rev.1 bits 28..29 must be preserved */
+ im->sysconf.sicrh = (im->sysconf.sicrh & 0x0000000C) | CFG_SICRH;
+#else
im->sysconf.sicrh = CFG_SICRH;
#endif
+#endif
#ifdef CFG_SICRL
im->sysconf.sicrl = CFG_SICRL;
#endif