[U-Boot] [PATCH 3/9] imx: mx6: ddr correct tRFC and tXS

[Stefano Babic]

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 at freescale.com>
> Cc: Stefano Babic <sbabic at denx.de>
> Cc: Tim Harvey <tharvey at 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;
>  		break;
>  	case 8: /* 8Gb per chip */
>  		trfc = DIV_ROUND_UP(350000, clkper) - 1;
> 

Reviewed-by: Stefano Babic <sbabic at denx.de>

Best regards,
Stefano Babic


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