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>

of: Fix memory hole in of_find_node_by_reproducible_name() ...

of_get_reproducible_name() returns an allocated string, so we must free
it.

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

OF: gpio: Add special quirk to parse regulator flags ...

To make fec work with devicetree on imx28-evk, partially port following
kernel patch:

|commit a603a2b
|Author: Linus Walleij <linus.walleij@linaro.org>
|Date:   Sat Dec 30 16:26:36 2017 +0100
|
|    gpio: of: Add special quirk to parse regulator flags
|
|    While most GPIOs are indicated to be active low or open drain using
|    their twocell flags, we have legacy regulator bindings to take into
|    account.
|
|    Add a quirk respecting the special boolean active-high and open
|    drain flags when parsing regulator nodes for GPIOs.
|
|    This makes it possible to get rid of duplicated inversion semantics
|    handling in the regulator core and any regulator drivers parsing
|    and handling this separately.
|
|    Unfortunately the old regulator inversion semantics are specified
|    such that the presence or absence of "enable-active-high" solely
|    controls the semantics, so we cannot deprecate this in favor
|    of the phandle-provided inversion flag, instead any such phandle
|    inversion flag provided in the second cell of a GPIO handle must be
|    actively ignored, so we print a warning to contain the situation
|    and make things easy for the users.
|
|    Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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

of: partition: use NULL instead of never-read argument ...

len isn't read afterward and of_get_property accepts NULL as third
argument, so do it.

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

Merge branch 'for-next/zynqmp'

of: Fix reproducible names for #address-cells != 1 ...

For the new "fixed-partitions" binding we ignore the partitions
subnode for creating reproducible names and set node to its parent.
To get the number of address cells we must call of_n_addr_cells()
before setting node to its parent though, not afterwards. With the
current behaviour we always get OF_ROOT_NODE_ADDR_CELLS_DEFAULT (=1).
This happens to work then the partitioned device is less than 4GiB
in size. On bigger devices #address-cells = <2> is chosen by the
mtd partition fixup code.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reported-by: Bastian Krause <bst@pengutronix.de>

of: populate "/firmware" while populating device tree ...

The sub-nodes of "/firmware" are not populated, since it has no
"compatible" property. Copy the behavior of Linux and call
of_platform_populate() on the "/firmware" node to probe firmware
drivers.

Signed-off-by: Thomas Haemmerle <thomas.haemmerle@wolfvision.net>
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

drivers: of: Add function to enable and register a device by alias ...

In some cases node names are not unique and passing the full path is really long.
So make add a new device by passing the alias string possible.

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

net: Phy: Update phy interface modes from Linux ...

This syncs the phy interface modes with Linux and adds names
that were previously missing. With this we no longer have holes in
the phy mode name arrays and thus of_get_phy_mode no longer
derefences NULL pointers when it finds such a hole.

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

Add initial RISC-V architecture support ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: Add .of suffix to device names from devicetree ...

Previous implementation used to add a number to the device names
for devices registered from the device tree which did not have a 'reg'
property, thus a device node named "state" resulted in a device name
"state.<x>". Current implementation skips that number and we get a
device named "state". This conflicts with our barebox state
implementation which tries to register a device named "state" itself.
We could rename the state device nodes of all our device trees, but it
causes less trouble to rename the devices.

This adds a ".of" suffix to the device names for devices registered from
the device tree which also has the nice effect that they now can easily
be recognized.

Fixes: 7e497d48acbd11 ("of: Port latest of_device_make_bus_id() implementation")

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Jan Lübbe <jlu@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: partition: set ret for error cases ...

looks like it was forgotten.

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

Merge branch 'for-next/state'

Merge branch 'for-next/net-switch-mv88e6xxx'

Merge branch 'for-next/misc'