diff options
| author | Pantelis Antoniou <pantelis.antoniou@konsulko.com> | 2014-10-28 22:35:58 +0200 |
|---|---|---|
| committer | Grant Likely <grant.likely@linaro.org> | 2014-11-24 22:25:10 +0000 |
| commit | 7518b5890d8ac366faa2326ce2356ef6392ce63d (patch) | |
| tree | e09fd7f3aa6613b70878c82b1cd372570eb2d503 /drivers/of/Kconfig | |
| parent | 801d728c10db4b28e01590b46bf1f0df930760cc (diff) | |
of/overlay: Introduce DT overlay support
Overlays are a method to dynamically modify part of the kernel's
device tree with dynamically loaded data. Add the core functionality to
parse, apply and remove an overlay changeset. The core functionality
takes care of managing the overlay data format and performing the add
and remove. Drivers are expected to use the overlay functionality to
support custom expansion busses commonly found on consumer development
boards like the BeagleBone or Raspberry Pi.
The overlay code uses CONFIG_OF_DYNAMIC changesets to perform the low
level work of modifying the devicetree.
Documentation about internal and APIs is provided in
Documentation/devicetree/overlay-notes.txt
v2:
- Switch from __of_node_alloc() to __of_node_dup()
- Documentation fixups
- Remove 2-pass processing of properties
- Remove separate ov_lock; just use the DT mutex.
v1:
- Drop delete capability using '-' prefix. The '-' prefixed names
are valid properties and nodes and there is no need for it just yet.
- Do not update special properties - name & phandle ones.
- Change order of node attachment, so that the special property update
works.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'drivers/of/Kconfig')
| -rw-r--r-- | drivers/of/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index fbe8f8d418f7..18b2e2539f84 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -84,4 +84,11 @@ config OF_RESERVED_MEM config OF_RESOLVE bool +config OF_OVERLAY + bool + depends on OF + select OF_DYNAMIC + select OF_DEVICE + select OF_RESOLVE + endmenu # OF |