[meta-xilinx] mainline u-boot on zedboard

[gmane at reliableembeddedsystems.com]

Hi,

On 2016-01-11 02:08, Nathan Rossi wrote:
> 
> You will need to modify zynq-common.h to enable it.
> 
> diff --git a/include/configs/zynq-common.h 
> b/include/configs/zynq-common.h
> index 0ab6083..a844062 100644
> --- a/include/configs/zynq-common.h
> +++ b/include/configs/zynq-common.h
> @@ -199,6 +199,8 @@
>  #ifndef CONFIG_ENV_IS_NOWHERE
>  # ifndef CONFIG_SYS_NO_FLASH
>  #  define CONFIG_ENV_IS_IN_FLASH
> +# elif defined(CONFIG_ZYNQ_QSPI)
> +#  define CONFIG_ENV_IS_IN_SPI_FLASH
>  # elif defined(CONFIG_SYS_NO_FLASH)
>  #  define CONFIG_ENV_IS_NOWHERE
>  # endif
> 
> This will use the QSPI flash if available for storing the environment.
> After this saveenv/etc. will work. I quickly tested on a Zybo (I don't
> have a Zedboard) and it works quite well albeit slowing the boot a bit
> (~1 second or so).

I tried this on a zedboard with v2016.01 and it "kind of worked".
What I mean is, it saved all my environment, but it looks like I need to 
set modeboot for it to pick up my uenvcmd.

=> set modeboot 'uenvcmd'
=> saveenv
Saving Environment to SPI Flash...
SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, 
total 32 MiB
Erasing SPI flash...Writing to SPI flash...done
=> print modeboot
modeboot=uenvcmd
=> boot

works

... but ..

after a reboot I noticed that modeboot did not keep the value I wanted 
which most likely means that it was not poperly stored in the SPI flash:

Hit any key to stop autoboot:  0
=>
=>
=>
=> printe modeboot
modeboot=sdboot
=>

so I tried:

=>
=> setenv bootcmd 'run uenvcmd'
=> saveenv
Saving Environment to SPI Flash...
SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, 
total 32 MiB
Erasing SPI flash...Writing to SPI flash...done
=> boot

... which did the trick for me ...

Since I guess you want to choose between norboot/sdboot/jtagboot/usbboot 
via the modeboot variable you might want to check why it's not saved in 
the SPI flash.

Regards,

Robert