OF: base: use of_delete_property where applicable ...

This patch makes OF API use of_delete_property where applicable instead
of freeing allocated data in different places.

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

OF: base: add sanity checks to of_new/delete_property ...

This adds some sanity checks to of_new_property and of_delete_property.
Also, value pointer is always allocated even with zero length to allow
empty properties to be distinguished from non-existing properties.
Finally, data passed to of_new_property is only copied if non-NULL.

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

OF: base: remove of_find_child_by_name ...

With of_get_child_by_name from Linux API, we can now convert and remove
of_find_child_by_name.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: remove of_tree_for_each_node from public API ...

This patch converts users of of_tree_for_each_node to recently added
for_eacg_compatible_node helper. Also of_tree_for_each_node is removed
from public OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import property iterators from Linux OF API ...

This imports of_prop_next_u32, of_prop_next_string, and the corresponding
for_property_for_each_ helpers from Linux OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: introduce property write for bool, u8, u16, and u64 ...

This adds functions to set an array of or a single value for bool,
u8, u16, and u64 properties.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import parse phandle functions from Linux OF API ...

This imports of_parse_phandle_with_args and of_count_phandle_with_args
from Linux OF API. The slightly different of_parse_phandles_with_args
is removed and all users are converted to reflect the API change.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import of_parse_phandle from Linux OF API ...

This imports of_parse_phandle from Linux OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import of_property_read_* helpers from Linux OF API ...

This imports of_property_read_* helpers from Linux OF API to allow
to read all kinds of properties.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import parent/child functions from Linux OF API ...

This imports of_get_parent, of_get_next_available_child, and
of_get_child_by_name and corresponding helpers from Linux OF API.
of_get_next_child is not imported but implemented as list iterator
instead. Also, of_get_child_count and of_get_available_child_count
are introduced.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import of_find_node_with_property from Linux OF API ...

This imports of_find_node_with_property and corresponding helpers
from Linux OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import of_find_matching_node_and_match from Linux OF API ...

This imports of_find_matching_node_and_match and corresponding helpers
from Linux OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import of_find_compatible_node from Linux OF API ...

This imports of_find_compatible_node and corresponding for_each_compatible_node
helper from Linux OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: import of_find_node_by_name from Linux OF API ...

This imports of_find_node_by_name and corresponding for_each_node_by_name
helper from Linux OF API.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: rename of_node_disabled to of_device_is_available ...

According to ePAPR 1.1 spec, device tree nodes status can be either
"okay", "disabled", "fail", or "fail-sss". Barebox already has a function
to check for "disabled" nodes, while Linux checks for "okay" or "ok".
To synchronize Barebox and Linux OF APIs, rename of_node_disabled to
of_device_is_available and check for "okay" instead of "disabled" as it
also makes "fail"ed devices unavailable.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

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

To start synchronizing OF API of barebox with linux OF API, this adds
a length pointer to of_find_property. Also all current users of that
function are updated to reflect the API change.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: convert strcmp to default string compare functions ...

Barebox compares compatible, node names, and property names with strcmp.
Linux by default compares compatible and node names with strcasecmp. To
avoid inconsitencies between Barebox and Linux dts files, we convert to
these default string compare functions.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: export of_alias_scan ...

To prepare clean-up of OF API, we need to export of_alias_scan.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: also update property length on of_property_write_u32 ...

Current implementation of of_property_write_u32 does free old property
values and allocates new values depending on the size passed. While
copying the new values to the property, corresponding length is not
set. This makes of_property_write_u32 set the length of the new property
values and also adds a API header describing the function.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

OF: base: bail out early on missing matches for of_match_node ...

of_match_node checks for compatiblity between a set of matches and a
node. Neither the matches nor node pointer are checked for validity.
This adds the required checks to of_match_node.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

Merge branch 'for-next/of-i2c'

Merge branch 'for-next/of'

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

Conflicts:
	include/of.h

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

Conflicts:
	include/driver.h

of: Add of_modalias_node function ...

Directly from the Kernel.

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

of: Also print disabled nodes ...

It's confusing to set the status of a node to disabled and afterwards
it's invisible. Similarly it's confusing to be able to enable invisible
nodes.

Also print disabled nodes.

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

of: do not scan aliases when no root node present ...

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

of: Add of_alias_get function ...

This is used to retrieve the name of the alias for a given
devicenode.

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

of: populate devices based on "simple-bus" property ...

We used to populate the devices from the devicetree based on the
presence of the 'reg' property. This is incorrect since this only
allows us to probe devices with resources.
Instead use the 'simple-bus' property to see if we have iterate
deeper. This also registers devices with their buses as parents.

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