[U-Boot] [PATCH] mx51evk: Add CONFIG_REVISION_TAG

[Fabio Estevam]

Hi Greg,

On Tue, Sep 18, 2012 at 10:00 AM, Greg Topmiller
<Greg.Topmiller at jdsu.com> wrote:
> Fabio/Benoit,
>
> I tried the get_board_rev alone and it worked on my mx51evk.
>
> In the FSL u-boot version I am using the set_board_rev is:
> static inline void set_board_rev(int rev)
> {
>         system_rev |= (rev & 0xF) << 8;
> }

So you should call it as "set_board_rev(BOARD_REV2)" , where:
#define BOARD_REV2 0x1

I don't think we have boards older than rev2 anymore.

Looking at the FSL kernel, there are are some tests for "if
(board_is_rev(BOARD_REV_2))"
and they should return true from what I can see from the schematics.

 841                 if (board_is_rev(BOARD_REV_2))
 842                         /* BB2.5 */
 843                         ret = gpio_get_value(BABBAGE_SD2_CD_2_5);
 844                 else
 845                         /* BB2.0 */
 846                         ret = gpio_get_value(BABBAGE_SD2_CD_2_0);
 847                 return ret;

With the original patch from Benoit "board_is_rev(BOARD_REV_2)" would
return falsem which would then assign the wrong SD2 card detect pin,
for example.

Regards,

Fabio Estevam