[U-Boot] [RFC] [PATCH 0/4] Add support for Freescale's 85xx and P1/P2xxx eSPI controller

Can Aydin
2010-09-28T12:27:24Z

>> Can the Chip Select Pins be used as GPIO? It might be simpler to do
>> that than
>> adding a speciality to common code.
> True, a GPIO pin could be re-purposed to serve as chip select, but that
> would involve a soldering iron and a steady hand as the P1/P2xxRDB
> boards are reference design boards sold by a lot of third party vendors
> (including Denx if I'm not mistaken) this would detract from the ability
> to just plug u-boot in and run with it.
>
> People could also choose to bitbang the SPI on their custom hardware but
> again I feel that might defeat the purpose and spirit of u-boot. (Then
> again, I'm new so don't quote me on that).
>
Quick followup, I may have misunderstood that question. The SPI pins can
only be re-purposed as extra data pins for the SDHC. It's not possible
to use them as GPIO.