[U-Boot] Building u-boot.imx and SPL simultaneously

[Tom Rini]

On Fri, Sep 02, 2016 at 10:53:58PM +0200, Petr Kulhavy wrote:
> Hi Fabio,
> 
> On 02/09/16 22:03, Fabio Estevam wrote:
> >You don't need u-boot.imx to boot the board with imx_usb_loader.
> >Check the README update that Stefano did with this commit:
> >
> >commit 40f4839ce12adfc0223d6e3035cf9c3a4754a0ec
> >Author: Stefano Babic <sbabic at denx.de>
> >Date:   Fri Dec 11 17:30:42 2015 +0100
> >
> >     imx_common: check for Serial Downloader in spl_boot_device
> >
> >     Check for bmode before reading the boot device
> >     to check if a serial downloader is started,
> >     and returns UART if the serial downloader is set,
> >     letting SPL to wait for an image if
> >     CONFIG_SPL_YMODEM_SUPPORT is set.
> >
> >     This allows to load again a SPL based board
> >     with imx_usb_loader together with a tool
> >     such as kermit.
> >
> >     Signed-off-by: Stefano Babic <sbabic at denx.de>
> >     CC: Tim Harvey <tharvey at gateworks.com>
> >     CC: Fabio Estevam <Fabio.Estevam at freescale.com>
> >     CC: Eric Nelson <eric.nelson at boundarydevices.com>
> >     Reviewed-by: Eric Nelson <eric at nelint.com>
> >     Tested-by: Eric Nelson <eric at nelint.com>
> This is not particularly what I want to do. I want to load the
> u-boot.img directly via the imx_usb_loader.
> The kermit method is unacceptably slow for a production environment.

Another place this doesn't work (which is where it doesn't work for me)
is when the console is already open and I can't easily take it away to
shoot over the next stage via Y-MODEM.

Would it be possible to implement having the next stage also be sent via
imx_usb_loader?  ie there's examples today of doing u-boot.imx + kernel
+ initrd via imx_usb_loader, so what would be needed for SPL +
u-boot.img (+ kenrel + initrd) via imx_usb_loader?  Thanks!

-- 
Tom
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