common: oftree: Add function to register set status fixup ...

Added a function to register a fixup to enable or disable
device tree nodes.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of_fix_tree: do not fail when fixup fails ...

When a device tree fixup fails it is worth printing a warning, but
we should not fail booting.

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

of_fix_tree: Print error message ...

When a of_fixup handler fails add a meaningful error message so
that the user gets a clue what might have gone wrong.

Suggested-by: Enrico Joerns <ejo@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: add a function to remove an of_fixup ...

This function is needed when a device that already registered a fixup in
the probe routine fails later to probe completely. Without unregistering
the fixup the function might later be called with invalid data.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: Add a context pointer to fixup functions ...

If drivers want to fixup their specific instance they need some context
to know which instance they have to fixup.

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

of: Use correct devicetree in of_print_cmdline ...

of_print_cmdline() is passed a devicetree, so use this one instead
of the internal devicetree. This fixes the cmdline printout when
bootm on ARM is used with an external devicetree.

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

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>

bootm: print Kernel commandline in verbose mode ...

Without devicetree support we print the Kernel commandline in
verbose mode. Do the same with devicetree boot aswell.

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

of: remove unused define ...

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>

ARM bootm: Switch initrd support to unflattened tree ...

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

of: fixup unflattened devicetree ...

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

of: Pass barebox internal format devicetree to of_get_fixed_tree ...

With this every devicetree is first converted to the barebox internal
format before it's converted back to dtb again.

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

of: make flatten independent of libfdt ...

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

Merge branch 'for-next/highbank'

of: add do_fixup_by_compatible with u32 and string version ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

DeviceTree: add support for initrd in the DT ...

Add the initrd start and end address to the DT, code comes from u-boot.

Signed-off-by: Vicente Bergas <vicencb@gmail.com>
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: 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>

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>

of: Fix usage of 0 as NULL pointer ...

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

booting: more flexible Linux bootargs generation ...

We currently use the environment variable 'bootargs' to get the
Linux bootargs. This patch allows for a more flexible bootargs
generation using global variables. With it the Linux bootargs
are concatenated from multiple variables. This allows to replace
parts of the bootargs string without having to reconstruct it
completely.
With this bootargs can be constructed like:

global linux.bootargs.base="console=ttyS0,115200"
global linux.bootargs.ip="ip=dhcp"
global linux.mtdparts="physmap-flash.0:512K(nor0.barebox),-(root)"

This will then automatically be combined into a kernel bootargs
string during boot.

If the 'linux.bootargs.' variables are all empty the old standard
'bootargs' way will be used.

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>