[PATCH v2] zynqmp: Dynamic setting mmcdev and mmcroot

[Michal Simek]

Hi,

On 2/1/25 15:06, egyszeregy at freemail.hu wrote:
> From: Benjamin Szőke <egyszeregy at freemail.hu>
> 
> Dynamic setting mmcdev and mmcroot.
> Then when boot linux, we can have correct "root=/dev/mmcblk[x]p2"

This is source of the problem. That root partition is second is only your choice 
and doesn't need to be choice for others.

There is no reason to write this logic to C code.

We are exporting variable bootseq which you can use to determine which 
controller was used by boot device and can be used for rootfs.

Here is how you can compose your bootargs.

ZynqMP> setenv bootseq 50
ZynqMP> setenv bootargs root=/dev/mmcblk${bootseq}p2
ZynqMP> pri bootargs
bootargs=root=/dev/mmcblk50p2

Or you should look at devnum which is setup when mmc boot is called.

bootcmd_mmc0=devnum=0; run mmc_boot
bootcmd_mmc1=devnum=1; run mmc_boot

Thanks,
Michal