Refresh cycle value must be selected based on the frequency of DDR. tREFI = 7.8 us as per JEDEC. The value for MDREF[REF_CNT] should be based on round up (tREFI/tCK) formula. For 500MHz, mdref value should be 0x0f3c8000.

Signed-off-by: Calvin Johnson calvin.johnson@nxp.com Signed-off-by: Prabhakar Kushwaha prabhakar.kushwaha@nxp.com --- include/fsl_mmdc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/fsl_mmdc.h b/include/fsl_mmdc.h index 833696b..a939d89 100644 --- a/include/fsl_mmdc.h +++ b/include/fsl_mmdc.h @@ -43,7 +43,7 @@

#define CONFIG_SYS_MMDC_CORE_PWR_SAV_CTRL_STAT 0x00001067

-#define CONFIG_SYS_MMDC_CORE_REFRESH_CTL 0x103e8000 +#define CONFIG_SYS_MMDC_CORE_REFRESH_CTL 0x0f3c8000

#define START_REFRESH 0x00000001