Hi Tom,
On 09/06/2016 06:40 AM, Tom Rini wrote:
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@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>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!
SPL+u-boot.img could be bundled into a single image through the use of plugins which would require:
- updates to mkimage to support plugins, and - Makefile updates to produce a third output (u-boot.imx?), and - an update to SPL startup on i.MX to check for the plugin flag and return to the boot ROM after startup (instead of loading U-Boot) if set.
Troy implemented the key bits back in 2012, and I provided some links here:
http://lists.denx.de/pipermail/u-boot/2016-June/258784.html
Regards,
Eric