Re: [PATCH 0/3] add Ebang EBAZ4205 support

Am 2021-01-21 14:16, schrieb Michal Simek:

On 1/21/21 11:41 AM, Michael Walle wrote:

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Am 2021-01-21 11:23, schrieb Michal Simek:

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Back to your case. Board is cheap which is not all the time case 
for
any
xilinx board but you have only uart, sd and partially described
ethernet
which doesn't work without PL. Is it worth to have this described?

I got your point. But it is at least a jump start for the users if 
that
board boots out of the box. And yes, its unfortunate, that ethernet
just works if the PL is configured. This is already done by the
bootloader, because there I do have the same problem.

Zynq/ZynqMP boards can use U-Boot SPL. "Advantage" of this solution
especially for Zynq is that in u-boot there is open a way for adding
ps7_init file which is determined by device tree name.
I think it would make sense to add these DTs and also ps7_init to 
U-Boot
project and wire it up with zynq_virt platform and then you can boot
Linux with using U-Boot's DT pointed by $fdtcontroladdr.
Then you will get support from scratch to be able to boot.

I already have patches for u-boot (using SPL). But my impression was
that linux is the master for the device trees. Esp. if there are some
problems with the board its often useful to have an in-tree device
tree.

What is the difference between this board and the other zynq boards
in the kernel?

In any case, please make this decision now: will you accept this
device tree or not?

If you promise to regularly test it I am fine with it.

I might even integrate it into our lava lab.

-michael

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