[U-Boot] [PATCH v1] arm64: zynqmp: Setup the first boot_target at run time

[Michal Simek]

On 18.5.2018 11:18, Alexander Graf wrote:
> On 05/18/2018 10:43 AM, Michal Simek wrote:
>> Detect mmc alias at run time for setting up proper boot_targets sequence.
>> The first target has to correspond with boot mode.
>>
>> The purpose of this patch is to get rid of CONFIG_ZYNQ_SDHCI0/1
>> parameters in full U-Boot.
>> Unfortunately this patch can't remove it because there is missing
>> mmc implementation for SPL_DM_SEQ_ALIAS.
>>
>> Also xilinx_zynqmp.h only setup boot commands for mmc0 and mmc1.
>> It means using aliases with higher number won't work. But switching
>> between mmc0 and mmc1 should work properly.
>>
>> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
>> ---
>>
>> Changes in v1:
>> - No change from RFC. Current setup has all mmc boot commands
>>    that's why it shouldn't be an issue to add this to the tree.
>>
>> Not sure how exactly to tune BOOT_TARGET_DEVICES_MMC to have functions
>> for different aliases ID. I can simply setup devnum based on dev->seq
>> and also generate the whole bootcmd_mmc0
>>
>> bootcmd_mmc0=setenv devnum 0; run mmc_boot
>> bootcmd_mmc1=setenv devnum 1; run mmc_boot
>>
>> The second patch is doing that.
>> But still if you setup alias to higher number mmc core is not mmc dev
>> command is not able to work with it.
> 
> That's a bigger discussion really: How to have distro boot deal with
> devices we don't predict during compile time yet?

And that's something what distribution needs to find out.
I connection to this I need to remove that macros from SPL now.

Thanks,
Michal