[U-Boot] [PATCH] t2080qds/ddr: update ddr parameters

[York Sun <yorksun@freescale.com>]

On 12/06/2013 12:53 AM, Shengzhou Liu wrote:
> - optimize ddr parameters for whole frequency range from 1500MT/s to 2140MT/s.
> - remove unused patameters: 'cpo', 'wrdata delay', '2T', which is unrelated
>   to DDR3/3L on t2080qds.
> - remove unused rdimm code(only udimm is supported on t2080qds).
> 
> Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
> ---
> Against master branch of git://git.denx.de/u-boot-mpc85xx.git
> 
>  board/freescale/t2080qds/ddr.c | 20 ++-----------
>  board/freescale/t2080qds/ddr.h | 64 +++++++++---------------------------------
>  2 files changed, 17 insertions(+), 67 deletions(-)
> 
> diff --git a/board/freescale/t2080qds/ddr.c b/board/freescale/t2080qds/ddr.c
> index 5db5d21..bc366ae 100644
> --- a/board/freescale/t2080qds/ddr.c
> +++ b/board/freescale/t2080qds/ddr.c
> @@ -24,24 +24,17 @@ void fsl_ddr_board_options(memctl_options_t *popts,
>  	const struct board_specific_parameters *pbsp, *pbsp_highest = NULL;
>  	ulong ddr_freq;
>  
> -	if (ctrl_num > 2) {
> +	if (ctrl_num > 1) {
>  		printf("Not supported controller number %d\n", ctrl_num);
>  		return;
>  	}
>  	if (!pdimm->n_ranks)
>  		return;
>  
> -	/*
> -	 * we use identical timing for all slots. If needed, change the code
> -	 * to  pbsp = rdimms[ctrl_num] or pbsp = udimms[ctrl_num];
> -	 */
> -	if (popts->registered_dimm_en)
> -		pbsp = rdimms[0];
> -	else
> -		pbsp = udimms[0];
> +	pbsp = udimms[0];
>  

This is not right. You should throw out an error if RDIMM is not
supported. But why isn't it supported? T2080 SoC can support RDIMM.

York