[U-Boot] [PATCH 2/6] README: mx28_common: Do not hardcode the SSP port

Marek Vasut
2013-05-03T20:47:21Z

Dear Fabio Estevam,

> On Fri, May 3, 2013 at 4:52 PM, Marek Vasut <marex@denx.de> wrote:
> >> To boot a MX28 based board from SD, set the boot mode DIP switches
> >>
> >> according -to i.MX28 manual chapter 12.2.1 (Table 12-2), PORT=SSP0,
> >> SD/MMC master on -SSP0, 3.3V.
> >> -
> >> +to i.MX28 manual chapter 12.2.1 (Table 12-2).
> >
> > Make sure to leave the 3V3 thing there. PORT=SSPn would be a better
> > solution here too.
>
> Sorry, but I disagree.
>
> Please check table 12-2 from mx28 reference manual and you will see
> that SD boot is also possible in 1.8V, so in the common README file it
> makes no sense to hardcode the boot voltage. Besides that, mx23 does
> not refer to 3.3V in its boot mode table.

When was the last time you saw 1V8 SD card ? ;-)

> PORT=SSPn is also noisy. Let's get rid of all this. People will have
> to look the reference manual anyway.
>
> Also, in v2 I will change "set the boot mode DIP switches" to "set the
> boot mode pins", as not all boards use DIP switches.

Best regards,
Marek Vasut