[U-Boot] [PATCH v5 1/7] ls2080: Exit dpaa only right before exiting U-Boot

[Alexander Graf]

Hi Prabhakara,

On 17.10.16 05:42, Prabhakar Kushwaha wrote:
> Hi Alex,
> 
>> -----Original Message-----
>> From: Alexander Graf [mailto:agraf at suse.de]
>> Sent: Saturday, October 15, 2016 3:33 PM
>> To: u-boot at lists.denx.de
>> Cc: york sun <york.sun at nxp.com>; Prabhakar Kushwaha
>> <prabhakar.kushwaha at nxp.com>
>> Subject: [PATCH v5 1/7] ls2080: Exit dpaa only right before exiting U-Boot
>>
>> On ls2080 we have a separate network fabric component which we need to
>> shut down before we enter Linux (or any other OS). Along with that also
>> comes configuration of the fabric using a description file.
>>
>> Today we always stop and configure the fabric in the boot script and
>> (again) exit it on device tree generation. This works ok for the normal
>> booti case, but with bootefi the payload we're running may still want to
>> access the network.
>>
>> So let's add a new fsl_mc command that defers configuration and stopping
>> the hardware to when we actually exit U-Boot, so that we can still use
>> the fabric from an EFI payload.
>>
>> For existing boot scripts, nothing should change with this patch.
>>
>> Signed-off-by: Alexander Graf <agraf at suse.de>
>>
> 
> Can we get one small modification in this patch to include env variable.
> So if a user **always** want " lazyapply", this info can be stored in env variable. This env variable will be used after reset without explicit u-boot command.

I'm not sure I understand your suggestion. We use "lazyapply" because
EFI payloads need to be able to use the fabric for network I/O which is
impossible after a normal apply.

Because we don't know in bootcmd whether we will end up in the old bootm
path or in the fallback distro path (which again potentially means
efi_loader), we have to play safe (lazyapply) by default.


Alex