[U-Boot] [PATCH 1/3] ARM: bcm283x: Move BCM283x_BASE to a global variable

Alexander Graf agraf at csgraf.de
Fri Sep 27 16:48:33 UTC 2019

On 27.09.19 18:11, Stephen Warren wrote:
> On 9/27/19 9:22 AM, Alexander Graf wrote:
>> On 27.09.19 17:01, Stephen Warren wrote:
>>> On 9/27/19 3:00 AM, matthias.bgg at kernel.org wrote:
>>>> From: Matthias Brugger <mbrugger at suse.com>
>>>> We move the per SOC define BCM283x_BASE to a global variable.
>>>> This is a first step to provide a single binary for several bcm283x
>>>> SoCs.
>>> How will this work, given that the memory layout is hard-coded into 
>>> the the DTB?
>>> Hopefully we aren't going to do some kind of nasty 
>>> bundle-all-the-dtbs-and-select-between-them approach, or 
>>> edit-the-dtb-at-runtime.
>> With CONFIG_OF_BOARD the DT comes from the RPi firmware blob which 
>> already provides the correct DTB for the target system.
> OK. Why does the U-Boot source code contain RPi DTBs then? Were they 
> just not deleted when that CONFIG_ option was enabled, or is the 
> transition to using FW-supplied DTBs still a work-in-progress?

The default option is to not use CONFIG_OF_BOARD. Making that the 
default is exactly what Matthias was referring to as a later step to 
enable a single binary.


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