On 17/08/2015 10:10, Peng Fan wrote:
To Chip density 4Gb, tRFC should be 300ns, see "Table 61 — Refresh parameters by device density" of JESD79-3E. tXS(min) is max(5nCK, tRFC(min) + 10ns).
Signed-off-by: Peng Fan Peng.Fan@freescale.com Cc: Stefano Babic sbabic@denx.de Cc: Tim Harvey tharvey@gateworks.com
arch/arm/cpu/armv7/mx6/ddr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/armv7/mx6/ddr.c b/arch/arm/cpu/armv7/mx6/ddr.c index 28fa3cf..3ec3e79 100644 --- a/arch/arm/cpu/armv7/mx6/ddr.c +++ b/arch/arm/cpu/armv7/mx6/ddr.c @@ -357,8 +357,8 @@ void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo, txs = DIV_ROUND_UP(170000, clkper) - 1; break; case 4: /* 4Gb per chip */
trfc = DIV_ROUND_UP(260000, clkper) - 1;txs = DIV_ROUND_UP(270000, clkper) - 1;
trfc = DIV_ROUND_UP(300000, clkper) - 1;txs = DIV_ROUND_UP(310000, clkper) - 1;
Reviewed-by: Stefano Babic sbabic@denx.de
Best regards, Stefano Babic