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

[Julien Grall <julien.grall@xxxxxxx>]

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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