Re: [Q] devicetree overlays

["Enrico Weigelt, metux IT consult" <info@metux.net>]

On 16.04.20 16:46, Sven Van Asbroeck wrote:

Hello folks,

> My situation is this: I have hardware which consists of several modules.
> Knowledge about the type and location of these modules is located in an
> on-board eeprom.

I've got a somewhat similar use cases, but not necessarily on DT-native
platforms:

a) composite devices that are probed via PCI or DMI and just instantiate
   a bunch of other (more generic) devices.

   For example the  APUv2/3/4 board driver: it eg. instanciates the
   gpio-amd-fch driver first, and then binds specific gpio lines to
   appropriate functions, eg. reset key (input), LEDs, ...

b) I2C devices behind an USB-based bus adapter.

In both cases it would be nice to have the actual device configuration
written as a DT snippet, which just needs to be loaded.

Let me know, if anybody has an idea how to do that.


--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@metux.net -- +49-151-27565287