[U-Boot-Users] using a flat device tree to drive u-boot config

André Schwarz
2008-07-29T08:26:14Z

Ben Warren schrieb:
> On Mon, Jul 28, 2008 at 10:43 AM, Scott Wood <scottwood@freescale.com> wrote:
>> Ben Warren wrote:
>>> On Mon, Jul 28, 2008 at 10:32 AM, Scott Wood <scottwood@freescale.com>
>>> wrote:
>>>> I find a device tree much easier to figure out than a tangled mess of
>>>> header
>>>> files, #defines, and #ifdefs...
>>> In many ways, yes. But are you an average Joe or a Linux kernel
>>> propellerhead?
>> Is u-boot work normally done by average Joes, and does the average Joe
>> really find the preprocessor mess more intuitive than a "propellerhead"?
>>
> You know what I mean. Some people like yourself do this for a living,
> and are involved day-to-day in its specification. Of course it's
> intuitive to you. For most people, getting U-boot going is one stage
> in the development process of software for an embedded device. They
> work on it for a few weeks or months, then on something completely
> different. A few months or years later, they come back to it.

You're absolutely right - just have a look at the vast lists of
maintainers/contributors ... they are "average Joes" like myself.
Realizing 2-3 projects each year should be possible without having to
re-learn from scratch.

>> While we're at it, let's re-write u-boot in Visual Basic. :-)
> Uh, yeah. I like the idea of a central repo for hardware info, and
> the device tree concept is good. My point is that the syntax, while
> concise and exact, can be intimidating. Just look at the amount of
> traffic on the mailing lists of people that don't understand what all
> the fields mean when specifying IRQs etc. Anything we can do to make
> it less so for noobies is a good thing for everybody.
>

Please keep in mind that WDenk is always watching if code is slowing
things down or increasing size significantly. Improving things is very
good - but not at the cost of size and/or speed. Configuring a board
using a dtb usually needs far more code being present than needed.
After all it's a bootloader and not another pseudo OS.

But don't get me wrong ! The device tree is a very nice and usefuly
thing ... for an OS.

regards,
Andr?

> cheers,
> Ben
>
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