Hi Petr,
On Fri, Sep 2, 2016 at 3:57 PM, Petr Kulhavy brain@jikos.cz wrote:
Hi,
you have already brought it to the point - it needs two defconfigs. This means double the files in U-boot and second and more important, how does it integrate into a tool like Buildroot?
Buildroot is capable of booting SPL + u-boot.img just fine. Check wandboard support a reference.
In other words I'm trying to do it with just one defconfig.
Alltogether I want to build 3 files:
- SPL which is started by the RBL
- u-boot.img which is loaded by the SPL from the flash after typing 'c' or
similar on the terminal
- u-boot.imx for an initial load of the board via USB if there is no BL at
all
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@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@denx.de CC: Tim Harvey tharvey@gateworks.com CC: Fabio Estevam Fabio.Estevam@freescale.com CC: Eric Nelson eric.nelson@boundarydevices.com Reviewed-by: Eric Nelson eric@nelint.com Tested-by: Eric Nelson eric@nelint.com