OF: base: sync of_find_node_by_path with linux OF API ...

Barebox of_find_node_by_path requires a node to be passed as start node
to start searching. Linux OF API does not pass this node and no current
user of it in barebox is passing anything else than the root node.
Therefore, we rename current function to of_find_node_by_path_from and
introduce a Linux OF API compatible of_find_node_by_path that always
passes the current root_node. Also, all current users of that function
are updated to reflect the API change.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: remove unused libfdt ...

Now that we are completely independent of libfdt remove the unused
code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

oftree command: retire CMD_OFTREE_PROBE Kconfig option ...

Whether or not the user wishes devicetree probe support can
now be decided indepentently of the oftree command, so retire
the CMD_OFTREE_PROBE option and use OFDEVICE in the code instead.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

oftree command: Use of_print_nodes ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: Add root node argument to of_find_node_by_path ...

This makes of_find_node_by_path usable with multiple trees.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: let of_unflatten_dtb return the unflattened tree ...

In order to be able to handle multiple devicetrees, do not assume
the tree to be unflattened is the barebox internal one. Instead,
just return a pointer to it and assign the barebox internal root_node
external to the unflatten function.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

oftree command: Add -s option to save internal oftree to file ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

oftree command: refactor ...

This has several improvements for the oftree command:

- loading a devicetree (-l) and actually probing (-p) it now is separated
- the command now can dump the internal devicetree or a dtb given on the
  command line.
- The -f option now actually frees the internal devicetree

With this the usage pattern for this command is:

oftree -l /env/oftree

oftree -d -n /sound

oftree -d /env/oftree

oftree -f

oftree -p

oftree -l -p /env/oftree

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: remove unused barebox_fdt ...

barebox_fdt should once become the pointer to the barebox internal
devicetree. Since barebox has its own internal devicetree format
this was never used. remove it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: rename of_parse_dtb to of_unflatten_dtb ...

The process of unflatten the device tree is known from the kernel,
so rename the function, because that's what it does.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/remove-fsf-address' ...

Conflicts:
	drivers/net/miidev.c
	include/miidev.h

Treewide: remove address of the Free Software Foundation ...

The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

oftree command: Add devicetree probe support ...

With this the -p option is no longer for parse, but for probe instead.
Using this parses a devicetree given on the command line and probes
the devices found in this tree. Devices which already exist are not
probed again, but instead their device_node is attached to the existing
device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands: remove struct command pointer from commands ...

This is unused in all commands and thus can be removed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

initial oftree command support ...

This adds basic device tree command support. So far we can
parse a flat device tree (-p), which also stores the tree
in memory, dump it (-d) and free (-f) the internally stored tree.

The chosen node can be updated with barebox bootargs, no other
device tree manipulation is implemented yet.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>