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Re: [Xen-devel] [RFC PATCH 1/2] xen/arm: Add Amlogic S905 SoC early printk support





On 09/12/2018 07:43 AM, Amit Tomer wrote:
Hello,

I am trying to understand why Linux is doing it. Do you expect all
U-Boot version to do it?

It's because Linux doesn't really trust u-boot and initializes every
thing again ?

You don't know the state of the UART once you left U-boot. For earlyprintk this may not be a big deal (they are for debugging only).

Mainline U-boot does it but that may also not required since ATF does it for us.

What I wanted to check is whether there are U-boot out configuring "incorrectly" the UART for earlyprintk. But I guess we can leave that aside for now.

Cheers,

--
Julien Grall


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