ppc4xx: Disable DDR2 autocalibration on Kilauea for now

Since the new autocalibration still has some problems on some Kilauea
boards with 200MHz DDR2 frequency we disable the autocalibration and
use the hardcoded values as done before. This seems to work reliably
on all known DDR2 frequencies.

After the autocalibration issue is fixed we will enable it again.

Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/include/configs/kilauea.h b/include/configs/kilauea.h
index 237a9c5..b943f31 100644 (file)
--- a/include/configs/kilauea.h
+++ b/include/configs/kilauea.h
@@ -235,9 +235,16 @@
  *
  * DDR Autocalibration Method_B is the default.
  */
+#if 0
+/*
+ * Needs FIX!!!
+ * Disable autocalibration for now, because of the unresolved problem
+ * with kilauea board using 200MHz PLB/DDR2 frequency
+ */
 #define        CONFIG_PPC4xx_DDR_AUTOCALIBRATION       /* IBM DDR autocalibration */
 #define        DEBUG_PPC4xx_DDR_AUTOCALIBRATION        /* dynamic DDR autocal debug */
 #undef CONFIG_PPC4xx_DDR_METHOD_A
+#endif
 
 #define        CONFIG_SYS_SDRAM0_MB0CF_BASE    ((  0 << 20) + CONFIG_SYS_SDRAM_BASE)