Add a map from phandles to nodes. This can be used by clients of the the
class instead of maintaining this themselves.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Kever Yang <kever.yang@rock-chips.com>

When dealing with multi-cell values we need a type that can hold this
value. Add this and a function to process it from a list of cell values.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Kever Yang <kever.yang@rock-chips.com>

We need to be able to search back up the tree for #address-cells and
 #size-cells. Record the parent of each node to make this easier.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Kever Yang <kever.yang@rock-chips.com>

This file was used to select between the normal and fallback libfdt
implementations. Now that we only have one, it is not needed.

Drop it and fix up all users.

Signed-off-by: Simon Glass <sjg@chromium.org>

Since we only have one Fdt implementation now we don't need to have a base
class. Merge the implementation and the base class together.

Signed-off-by: Simon Glass <sjg@chromium.org>

Drop this now-unused library and associated tests.

Signed-off-by: Simon Glass <sjg@chromium.org>

Use the new library if available, while retaining backwards compatibility
with the old library for now.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a way to find the byte offset of a property within the device tree. This
is only supported with the normal libfdt implementation since fdtget does
not provide this information.

Signed-off-by: Simon Glass <sjg@chromium.org>

After any node/property deletion the device tree can be packed to remove
spare space. Add a way to perform this operation.

Note that for fdt_fallback, fdtput automatically packs the device tree after
deletion, so no action is required here.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add support for deleting a device tree property. With the fallback
implementation this uses fdtput. With libfdt it uses the API call and
updates the offsets afterwards.

Signed-off-by: Simon Glass <sjg@chromium.org>

Some functions have the same code in the subclasses. Move these into the
superclass to avoid duplication.

Signed-off-by: Simon Glass <sjg@chromium.org>

These functions are identical in both subclasses. Move them into the base
class.

Note: In fact there is a bug in one version, which was fixed by this patch:

https://patchwork.ozlabs.org/patch/651697/



Signed-off-by: Simon Glass <sjg@chromium.org>

These functions are currently in a separate fdt_util file. Since they are
only used from PropBase and subclasses, it makes sense for them to be in the
PropBase class.

Move these functions into fdt.py along with the list of types.

Signed-off-by: Simon Glass <sjg@chromium.org>

At present we have two separate implementations of the Fdt library, one which
uses fdtget/fdtput and one which uses libfdt (via swig).

Before adding more functionality it makes sense to create a base class for
these. This will allow common functions to be shared, and make the Fdt API
a little clearer.

Create a new fdt.py file with the base class, and adjust fdt_normal.py and
fdt_fallback.py to use it.

Signed-off-by: Simon Glass <sjg@chromium.org>

In preparation for creating an Fdt base class, rename this file to indicate
it is the normal Fdt implementation.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a Python version of the libfdt library which contains enough features to
support the dtoc tool. This is only a very bare-bones implementation. It
requires the 'swig' to build.

Signed-off-by: Simon Glass <sjg@chromium.org>

This Python library provides a way to access the contents of the device
tree. It uses fdtget, so is inefficient for larger device tree files.

Signed-off-by: Simon Glass <sjg@chromium.org>