Dear Jason,
In message <20130221232821.GA2823@xxxxxxxxxxxxxxxxxxxx> you wrote:
>
> > > own seems to be rather static and stable, and unlike software there is
> > > no way I can change it (soldering irons don't count).
> >
> > There is other hardware available (for example FPGA based) where this
> > does not apply.
>
> Agreed.. We do that here as well, the DT is also used to describe the
> functionality inside FPGA(s). We do things like declare a GPIO
> controller inside the FPGA, then stack the bitbang MDIO/I2C on top of
> that, then declare a bunch of devices on those busses. DT makes this
> extremely straightforward.
>
> However, it is critical that the DT, kernel and FPGA are matched
> together - we always arrange things so that the DTB, kernel and FPGA
> config are bundled together and update atomically during firmware
> upgrade.
Agreed.
> Xilinx's Zynq is a great example of this kind of stuff, FWIW. IIRC
Indeed - Xilinx's Zynq, Altera's SoC FPGA, and others.
Such highly flexible hardware configurations require a new level of
software support that by far exceeds the classic static setups of more
"PC-like" systems where the only change you would expect is adding or
removing some PCI cards or the like.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@xxxxxxx
Don't tell me how hard you work. Tell me how much you get done.
-- James J. Ling
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