Commit graph

12 commits

Author SHA1 Message Date
Simon Glass
8828254cae dtoc: Adjust GetProps() in fdt_normal to use the node path
There is no need to pass a node path separately. Instead we should use the
path for the node provided. Correct this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-10-09 09:30:32 -06:00
Simon Glass
babdbde68f dtoc: Support finding the offset of a property
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>
2016-09-18 21:04:39 -06:00
Simon Glass
da5f74998b dtoc: Support packing the device tree
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>
2016-09-18 21:04:39 -06:00
Simon Glass
2a70d897ed dtoc: Support deleting device tree properties
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>
2016-09-18 21:04:39 -06:00
Simon Glass
0170804f60 dtoc: Move to using bytearray
Since we want to be able to change the in-memory device tree using libfdt,
use a bytearray instead of a string. This makes interfacing from Python
easier.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-09-18 21:04:39 -06:00
Simon Glass
346179f0d3 dtoc: Prepare for supporting changing of device trees
For binman we need to support deleting properties in the device tree. This
will change the offsets of nodes after the deletion. In preparation, add
code to keep track of when the offsets are invalid, and regenerate them.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-09-18 21:04:39 -06:00
Simon Glass
355c67c35a dtoc: Allow the device tree to be compiled from source
If a source device tree is provide to the Fdt() constructors, compile it
automatically. This will be used in tests, where we want to build a
particular test .dts file and check that it works correctly in binman.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-09-18 21:04:39 -06:00
Simon Glass
f7a2aeeeb8 dtoc: Move a few more common functions into fdt.py
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>
2016-09-18 21:04:38 -06:00
Simon Glass
c322a850af dtoc: Move Widen() and GetPhandle() into the base class
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>
2016-09-18 21:04:38 -06:00
Simon Glass
bc1dea3656 dtoc: Move BytesToValue() and GetEmpty() into PropBase
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>
2016-09-18 21:04:38 -06:00
Simon Glass
a06a34b203 dtoc: Create a base class for Fdt
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>
2016-09-18 21:04:38 -06:00
Simon Glass
66051b1f59 dtoc: Rename fdt.py to fdt_normal.py
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>
2016-09-18 21:04:38 -06:00
Renamed from tools/dtoc/fdt.py (Browse further)