of: rename new_device_node to of_new_node and export it ...

of_new_node now takes the parent node and the name as argument and
creates a new node. This simplifies the caller and also makes the
function useful for others, so export it.

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

of: add of_delete_property ...

This adds a function to delete a property from the currently loaded
devicetree. Also export new_property as of_new_property.

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: Add support for converting the unflattened tree back to a dtb ...

We already have support for unflattening the devicetree. This patch
adds support for converting it back to a dtb.

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>

of: of_free fixes ...

- Add missing prototype for of_free()
- When root node is freed set root_node to NULL
- (re)scan aliases after freeing a node. This is necessary because
  the freed node may be an alias or point to an alias

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

of: make of_get_fixed_tree more universally usable ...

Currently the bootm code uses of_fix_tree to apply the fixups
to the devicetree given on the command line. This function assumes
that there is enough space for the fixups available. Also on ARM
we have to make sure the tree does not cross 1Mib boundaries.

This patch moves the space allocation and alignment ensurance
to of_get_fixed_tree and uses it in bootm. This is the first
step for making of_get_fixed_tree the single point of devicetree
handling in barebox.
of_get_fixed_tree now takes an argument of the input fdt. If it is
given, this one is used, otherwise an internal oftree is used which
will be created in subsequent patches.

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

Merge branch 'for-next/of' ...

Conflicts:
	drivers/of/base.c
	include/of.h

console/of: evaluate linux,stdout-path property ...

When a linux,stdout-path property is given in the devicetree
activate the corresponding console.

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

of: Add function to get the model name ...

This is useful for printing it during startup.

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

of: Add devicetree partition parsing ...

Helper code to probe mtd partitions from the devicetree.

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

of: add devicetree probing support ...

This adds code to probe devices from a devicetree. Most helper
functions are directly imported from Linux.

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

oftree: add of_fix_tree() ...

Currently we have of_get_fixed_tree() which assumes that
there is a global variable holding a oftree. This seems
not very flexible, so for now introduce a of_fix_tree()
which takes an fdt_header as argument and walks the
list of registered of fixup functions.

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>