Merge branch 'for-next/misc'

net: remove unused Kconfig options ...

Both options are used nowhere and can be dropped:

- OF_NET code is compiled always and code is discarded at link-time if
  unreferenced
- Designware Ethernet can be enabled in Kconfig and no arch code
  selects the symbol

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: remove references to CREDITS ...

The CREDITS file was removed from barebox in 2015 by commit 6570288f2d97
("Remove the CREDITS file"). Remove references to it from several files.

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

Merge branch 'for-next/pwm'

Merge branch 'for-next/misc'

Merge branch 'for-next/kalray-coolidge'

of: port Linux of_get_compatible_child helper ...

Incoming Linux code port makes use of the helper. Add it now instead of
having to open-code it later.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

kvx: Initial Kalray Coolidge (kv3) architecture support ...

Add kalray coolidge arch/ support.

Signed-off-by: Clement Leger <cleger@kalray.eu>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: overlay: fix uninitialized read of variable ...

When there are no fragments, we return an uninitialized err.
Initialize err as zero, so it's returned in that case.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: use of_get_child_by_name() to find child node ...

After iterating the children of a node with for_each_child_of_node(),
the child node will never be NULL. If the node was not found,
overlay_child will always point to the first element in the list, which
might or might not be the node that was searched.

Use the of_get_child_by_name() helper function to find the child node
with the name, which does the right thing and returns NULL if the node
is not found.

Reported-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: introduce of_property_count_elems_of_size ...

Import the Linux helper, so code using it may be more easily ported.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: base: parse all available memory nodes ...

Currently, barebox only parse one memory node which is either the
"/memory" node or the first node with device_type == "memory".
However, the use of multiple memory nodes with device_type = "memory"
property is allowed by the device tree specification and already
correctly parsed by Linux kernel.
In order to fix that, add of_probe_memory function which loop over all
available memory nodes matching device_type == "memory".

Signed-off-by: Clement Leger <cleger@kalray.eu>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: base: allow of_add_memory to be called multiple times ...

Currently, of_add_memory can't be called multiple times because it will
always create memory banks by restarting at value 0. This means that, when
adding a second memory bank by calling again of_add_memory, it will be
named ram0 and overwrite the previous one. Fix that by using a static
variable to store the current memory bank number in order to be preserved
from one call to another.

Signed-off-by: Clement Leger <cleger@kalray.eu>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: overlay: rework error message for symbols ...

Missing symbols for overlay or root tree are valid if the overlay only
adds paths to the device tree. The code handles this correctly, however
it still isues a WARNING for the missing symbols. Demote the warning to
info and move into the of_overlay_apply_symbols() function.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: add missing newline to pr_warn ...

Add a missing newline to the pr_warn call while applying the overlays.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/rpi'

of: Read dma_offset from device tree ...

This reads the dma-ranges property from the device tree and sets
dma_offset in the devices accordingly. The code is mostly taken
from the Kernel as of v5.5-rc1. of_dma_configure() is trimmed down
to the cases we want to support currently.

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

of: Add of_bus_n_xxx_cells() ...

Added straight from the Kernel.

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

of: demote most debug output to loglevel 8 (vdebug) ...

Loglevel 7 (debug) is often useful to get barebox running on new
hardware; however, the heavy output of "OF:" messages makes most
boards take several minutes to boot to a prompt, printing things which
are probably interesting when debugging OF code itself, but not very
helpful otherwise. Degrade most of the message to loglevel 8 (vdebug).

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

of: Add of_property_read_string_array() ...

of_property_read_string_array() is used to read a multistring device
tree property into an array of strings. This is taken from the kernel.
It is implemented around of_property_read_string_helper() which can be
used to implement of_property_count_strings() and
of_property_read_string_index() as well.

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

of: of_path: fix return in case of EPROBE_DEFER ...

As said in commit 82eb3dff10 ("of_path: handle no driver for device")
this case happens if the driver isn't probed yet. So we should return
-EPROBE_DEFER to signal that.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

OF: gpio: don't warn if ignored GPIO flag matches the behavior ...

Port of the upstream accepted change to the Linux kernel.

Some devicetrees specify the ACTIVE_LOW flag in the fixed regulator GPIO
handle. While this has always been ignored, it's consistent with the
behavior of the regulator binding in the absence of the
"enable-active-high" DT property. It doesn't make much sense to print a
user visible warning for a configuration which is consistent, so only
print the warning if the GPIO flag contradicts the behavior dictated by
by the enable-active-high property.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/remoteproc'

Merge branch 'for-next/of-overlay'

of: base: don't try to read cells_name property if no cells_name set ...

Some device tree node parsed by of_count_phandle_with_args() have no #*-cells
parameter. To make linux device trees work with barebox, we should accept
cells_name set to NULL, so sync this behavior with linux.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

dtc: optionally add add __symbols__ to build-in devicetree ...

The devicetree overlay driver requires the __symbols__ node to resolve
phandles to the base devicetree. If Barebox has to apply the overlay to
the live devicetree, the build-in devicetree must be built with the
__symbols__ node.

It is configurable, because adding __symbols__ significantly increases
the size of the devicetree binary. When configuring Barebox, a developer
should be able to enable or disable devicetree overlay support and as
this only affects the build-in devicetree, which is linked to the image
anyway, use a Kconfig item for configuring the __symbols__.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

firmware: add support to load firmware from dt overlay ...

fpga-region device tree nodes have the firmware-name property that
contains the file name of firmware in the firmware search path (but not
the path) that shall be loaded before the overlay is applied.

Add the of_firmware_load_overlay() function that accepts an overlay and a
firmware search path, finds the responsible firmware_mgr and loads the
firmware.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: add iterator for overlays ...

Device tree overlays (the dto files) may contain multiple fragments for
different target nodes. Each fragment contains a __overlay__ node that
is applied to target node specified in the fragment.

Add a helper to call a function for each fragment in a device tree
overlay to avoid having device tree overlay internal information in
other modules.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: add support for devicetree overlays ...

The devicetree overlay support is based on the Linux driver for device
tree overlays, but many features that are not required in Barebox are
left out.

Unlike Linux, which applies the overlay to the live devicetree, Barebox
registers a fixup for the overlay which is applied with other fixups to
whatever tree is fixed. This is necessary to apply the overlay to
devicetrees that are passed to Linux, which might differ from the
devicetree that is currently live in Barebox.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: add of_diff() ...

of_diff compares two device trees against each other and prints a
diff-like result.

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