[U-Boot] [PATCH 1/3 v3] dm: Add callback to modify the device tree

[Stefan Roese]

On 22.02.2017 16:07, Mario Six wrote:
> Certain boards come in different variations by way of utilizing daughter
> boards, for example. These boards might contain additional chips, which
> are added to the main board's busses, e.g. I2C.
>
> The device tree support for such boards would either, quite naturally,
> employ the overlay mechanism to add such chips to the tree, or would use
> one large default device tree, and delete the devices that are actually
> not present.
>
> Regardless of approach, even on the U-Boot level, a modification of the
> device tree is a prerequisite to have such modular families of boards
> supported properly.
>
> Therefore, we add an option to make the U-Boot device tree (the actual
> copy later used by the driver model) writeable, and add a callback
> method that allows boards to modify the device tree at an early stage,
> at which, hopefully, also the application of device tree overlays will
> be possible.
>
> Signed-off-by: Mario Six <mario.six at gdsys.cc>

Applied to u-boot-marvell/master.

Thanks,
Stefan