linux.git/drivers/of/Kconfig, branch v3.19

of: remove select of non-existant OF_DEVICE config symbol

2014-11-26T15:19:43+00:00

The OF_OVERLAY option selects OF_DEVICE, but OF_DEVICE was removed in
commit ba166e900b, "of: remove CONFIG_OF_DEVICE". Remove the unnecessary
select.

Signed-off-by: Grant Likely 
Reported-by: Paul Bolle 
Cc: Pantelis Antoniou

of/overlay: Introduce DT overlay support

2014-11-24T22:25:10+00:00

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 
Signed-off-by: Grant Likely

of/fdt: export fdt blob as /sys/firmware/fdt

2014-11-19T15:09:49+00:00

Create a new /sys entry '/sys/firmware/fdt' to export the FDT blob
that was passed to the kernel by the bootloader. This allows userland
applications such as kexec to access the raw binary.

The fact that this node does not reside under /sys/firmware/device-tree
is deliberate: FDT is also used on arm64 UEFI/ACPI systems to
communicate just the UEFI and ACPI entry points, but the FDT is never
unflattened and used to configure the system.

A CRC32 checksum is calculated over the entire FDT blob, and verified
at late_initcall time. The sysfs entry is instantiated only if the
checksum is valid, i.e., if the FDT blob has not been modified in the
mean time. Otherwise, a warning is printed.

Signed-off-by: Ard Biesheuvel 
Signed-off-by: Grant Likely

of/unittest: Rename selftest.c to unittest.c

2014-11-04T16:43:07+00:00

This is unit testing code. It should use that name because it makes more
sense than 'selftest'. Rename the files to match and rename the config
variable.

Signed-off-by: Grant Likely

of/selftest: Use the resolver to fixup phandles

2014-10-04T20:24:35+00:00

The selftest data ends up causing duplicate phandles in the live tree
for the time that the testcase data is inserted into the live tree. This
is obviously a bad situation because anything attempting to read the
tree while the selftests are running make resolve phandles to one of the
testcase data nodes. Fix the problem by using the of_resolve_phandles()
function to eliminate duplicates.

Signed-off-by: Grant Likely 
Cc: Pantelis Antoniou 
Cc: Gaurav Minocha

of: Introduce Device Tree resolve support.

2014-10-04T20:24:26+00:00

Introduce support for dynamic device tree resolution.
Using it, it is possible to prepare a device tree that's
been loaded on runtime to be modified and inserted at the kernel
live tree.

Export of of_resolve and bug fix of double free by
	Guenter Roeck 

Signed-off-by: Pantelis Antoniou 
[grant.likely: Don't need to select CONFIG_OF_DYNAMIC and CONFIG_OF_DEVICE]
[grant.likely: Don't need to depend on OF or !SPARC]
[grant.likely: Factor out duplicate code blocks into single function]
Signed-off-by: Grant Likely

of: Fixing OF Selftest build error

2014-08-03T18:21:28+00:00

This patch is to fix following error while compiling OF selftests.
"drivers/of/selftest.c:617:2: error: implicit declaration of function
'of_fdt_unflatten_tree'"

Now, CONFIG_OF_SELFTEST depends on CONFIG_OF_EARLY_FLATTREE so that the
broken configuration cannot be selected. Ultimately it would be a good
idea to allow CONFIG_OF_SELFTEST to select CONFIG_OF_EARLY_FLATTREE, but
there is a dependency problem on i386 and x86_64 that causes dtc to not
get built and causes the build to fail. That problem needs to be fixed
first.

Signed-off-by: Gaurav Minocha 
Signed-off-by: Grant Likely

Adding selftest testdata dynamically into live tree

2014-07-25T06:18:13+00:00

This patch attaches selftest's device tree data (required by /drivers/of/selftest.c)
dynamically into live device tree. First, it links selftest device tree data into the
kernel image and then iterates over all the nodes and attaches them into the live tree.
Once the testcases are complete, it removes the data attached.

This patch will remove the manual process of addition and removal of selftest device
tree data into the machine's dts file.

Tested successfully with current selftest's testcases.

Signed-off-by: Gaurav Minocha 
[glikely: Removed ability to build as a module and fixed no-devicetree bug]
Signed-off-by: Grant Likely

of/fdt: Convert FDT functions to use libfdt

2014-04-30T05:59:15+00:00

The kernel FDT functions predate libfdt and are much more limited in
functionality. Also, the kernel functions and libfdt functions are
not compatible with each other because they have different definitions
of node offsets. To avoid this incompatibility and in preparation to
add more FDT parsing functions which will need libfdt, let's first
convert the existing code to use libfdt.

The FDT unflattening, top-level FDT scanning, and property retrieval
functions are converted to use libfdt. The scanning code should be
re-worked to be more efficient and understandable by using libfdt to
find nodes directly by path or compatible strings.

Signed-off-by: Rob Herring 
Tested-by: Michal Simek 
Tested-by: Grant Likely 
Tested-by: Stephen Chivers

Merge branch 'devicetree/next-reserved-mem' into devicetree/next

2014-03-19T15:01:53+00:00