Hi,
On 9 December 2014 at 11:19, SimonH simon.hoinkis@codethink.co.uk wrote:
Hi Simon,
On 04/12/14 15:53, Simon Glass wrote:
[715.979284 HC 0xd2]
This is a reboot command - EC_CMD_REBOOT_EC. I wonder how/why your U-Boot might issue that command?
From my investigation, Coreboot is issuing this reboot command, because the Coreboot payload (which in my case is U-Boot) for some reason isn't valid.
Normally you would hope for lots of AP serial output in this case.
With CONFIG_PANIC_HANG defined there is no UART output from the EC at all. Is a prepended SPL needed before the U-Boot+DTB payload?
I don't think so, but I have not tried.
When flashing U-Boot from the Chromium OS branch it gives some UART output but freezes because SPI and MMC driver are not working properly ("emerge-nyan chromeos-u-boot"). Is this the best starting point to develop a working U-Boot?
Yes, and I'm not sure of the state in the branch. Which branch?
See u-boot-dm/nyan-working for an upstream version. It boots (at least from USB A-A) and the display comes up. To do: EC, keyboard, USB, maybe other things.
Regards, Simon