PPC4xx: Correct SDRAM_MCSTAT for PPC405EX(r)
While the PowerPC 405EX(r) shares in common the AMCC/IBM DDR2 SDRAM
controller core also used in the 440SP, 440SPe, 460EX, and 460GT, in
the 405EX(r), SDRAM_MCSTAT has a different DCR value.
Its present value on the 405EX(r) causes a read back of 0xFFFFFFFF
which causes SDRAM initialization to periodically fail since it can
prematurely indicate SDRAM ready status.
Signed-off-by: Grant Erickson <gerickson@nuovations.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/asm-ppc/ppc4xx-sdram.h b/include/asm-ppc/ppc4xx-sdram.h
index cdccd8f..59f1c30 100644
--- a/include/asm-ppc/ppc4xx-sdram.h
+++ b/include/asm-ppc/ppc4xx-sdram.h
@@ -354,7 +354,11 @@
/*
* Memory controller registers
*/
+#ifndef CONFIG_405EX
#define SDRAM_MCSTAT 0x14 /* memory controller status */
+#else
+#define SDRAM_MCSTAT 0x1F /* memory controller status */
+#endif
#define SDRAM_MCOPT1 0x20 /* memory controller options 1 */
#define SDRAM_MCOPT2 0x21 /* memory controller options 2 */
#define SDRAM_MODT0 0x22 /* on die termination for bank 0 */