The memory controller could already be enabled, when spd_sdram() is
called. This could be the case for example, when the SDRAM is initialized
by the JTAG debugger.
Signed-off-by: Stefan Roese <s...@denx.de>
Cc: Reinhard Arlt <reinhard.a...@esd.eu>
Cc: Kim Phillips <kim.phill...@freescale.com>
---
cpu/mpc83xx/spd_sdram.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/cpu/mpc83xx/spd_sdram.c b/cpu/mpc83xx/spd_sdram.c
index 0f61180..952afeb 100644
--- a/cpu/mpc83xx/spd_sdram.c
+++ b/cpu/mpc83xx/spd_sdram.c
@@ -150,6 +150,13 @@ long int spd_sdram()
unsigned int ddrc_ecc_enable;
unsigned int pvr = get_pvr();
+ /*
+ * First disable the memory controller (could be enabled
+ * by the debugger)
+ */
+ ddr->sdram_cfg &= ~SDRAM_CFG_MEM_EN;
+ asm("sync;isync");
+
/* Read SPD parameters with I2C */
CONFIG_SYS_READ_SPD(SPD_EEPROM_ADDRESS, 0, 1, (uchar *) & spd, sizeof
(spd));
#ifdef SPD_DEBUG
--
1.6.6.rc1
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