[U-Boot] [PATCH] mx51evk: Fix number of DDR banks

[Stefano Babic]

On 05/19/2011 06:32 PM, Fabio Estevam wrote:
> MX51EVK board has 2 banks of 256MB DDR memories instead of a single one with 512MB.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
> ---

Hi Fabio,

>  board/freescale/mx51evk/mx51evk.c |   18 +++++++++++++++---
>  include/configs/mx51evk.h         |    7 +++++--
>  2 files changed, 20 insertions(+), 5 deletions(-)
> 
> diff --git a/board/freescale/mx51evk/mx51evk.c b/board/freescale/mx51evk/mx51evk.c
> index e2d3d74..ef7c6e4 100644
> --- a/board/freescale/mx51evk/mx51evk.c
> +++ b/board/freescale/mx51evk/mx51evk.c
> @@ -52,11 +52,23 @@ u32 get_board_rev(void)
>  
>  int dram_init(void)
>  {
> -	/* dram_init must store complete ramsize in gd->ram_size */
> -	gd->ram_size = get_ram_size((volatile void *)CONFIG_SYS_SDRAM_BASE,
> -				PHYS_SDRAM_1_SIZE);
> +	u32 size1, size2;
> +
> +	size1 = get_ram_size((volatile void *)PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
> +	size2 = get_ram_size((volatile void *)PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
> +
> +	gd->ram_size = size1 + size2;
> +

Do we really need this patch ? I am trying to understand. I think we
need always to set up two (or more) banks if there is a hole between the
two banks. For example, if it would be possible to install a memory with
a smaller size. This is the case of the MX53loco, because the range
between CSD0 and CSD1 is 1GB.

This is not the case of the mx51evk, if I am correct. CSD0 and CSD1
address each 256MB, and memory from the software point of view is
contiguous.

Best regards,
Stefano Babic

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