Hi Fabio
On 5/19/20 5:23 AM, Fabio Estevam wrote:
Hi Rudolf,
On Tue, May 19, 2020 at 1:28 AM Rudolf J Streif rudolf.streif@ibeeto.com wrote:
I solved the problem with u-boot not recognizing the eMMC. The device tree is working now for u-boot.
However, i.MX6 is using SPL which is loaded into OCRAM. If I flash SPL and u-boot to a boot partition on the eMMC the boot ROM loads SPL just fine but then SPL cannot load u-boot from eMMC:
Trying to boot from MMC1 MMC: no card present spl: mmc init failed with error: -123 SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ###
If I enable CONFIG_SPL_DM=y and CONFIG_SPL_DM_MMC=y then I am getting this undefined reference (and a whole slew of other related to DM):
common/built-in.o:(.u_boot_list_2_uclass_2_usb_hub+0x8): undefined reference to `dm_scan_fdt_dev'
Even if I get this to link then the next question of course is if it will fit into the 68k OCRAM that the SoC has (the whole device tree infrastructure has a rather large footprint). It is hard to follow why the DM now is essentially enforced for storage media but does not seem to be tested with SPL.
I had a similar issue on a pico-imx6ul board. I preferred to put the MMC initialization code in SPL rather than relying on DM as in SPL we are very tight in memory.
Please see this commit: https://gitlab.denx.de/u-boot/u-boot/-/commit/9b8d9ec41a6f161d53d32bf71f7933...
Thank you so much. You pointed me into the right direction. I was able to find a solution for my board.
Much appreciated.
Rudi