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armv8: ls1012a: Update Refresh cycle for DDR

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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>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Prabhakar Kushwaha 2016-07-19 15:54:33 +05:30 • committed by York Sun
parent 9c3fca2a79
commit 37eac3f460
1 changed files with 1 additions and 1 deletions
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2
include/fsl_mmdc.h
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@ -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