On 04/21/2016 04:46 AM, Yang, Wenyou wrote:
Hi,
Hi!
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>> Hi! >> >> I've been playing around with latest mainline u-boot on sama5d2 >> xplained ultra. I noticed that if I want to boot the board from >> SD card (SDHCI1), the board will indeed load the SPL from it, but >> SPL will try to load u-boot.img from eMMC >> (SDHCI0) and fail, as my eMMC is blank. > > Yes, there is some issue to load u-boot.img. I found there is > something to do on sdhci.c. > > You can try this branch, it should works. > > https://github.com/linux4sam/u-boot-at91/commits/u-boot-2016.03-at > 91
I am not interested in using non-mainline stuff. Do you have any particular patch/commit which I can refer to ? I do not think this has anything to do with sdhci.c driver at all, it has to do with detecting the boot device from which SPL was started and loading u-boot.img from the same boot device instead of always using SDHCI0.
I will test the mainline code. I will let you know when I get something.
OK.
Does the SoC have any sort of register which lists the current boot device ?
In this SoC, there is not register to list the current boot device.
And thus, it is not possible to detect at runtime from which device the SoC booted and thus load u-boot.img from the same device. Correct ?
Yes,
Ha, thanks for confirming.
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