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/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: 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: Demote "Bad cell count for" to debug ...

There are valid use-cases where getting OF_BAD_ADDR via that codepath
is expected. In addition to that analogous code in Linux kernel uses
pr_debug as well.

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

of: demote "no ranges" message to debug level ...

There are valid cases where there is no way to translate a OF node to
a MMIO address via ranges, so do the same as the Linux kernel and don't
print an error message in that case, but make it available as a debug
message.

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

of: import pci range parser from linux ...

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

drivers: of: import PCI bus specific translator ...

DT PCI address translation needs a special handling. This imports
the corresponding translator into of/address.c but makes it selectable
through Kconfig. Compared to the Linux version, we don't check for
struct device_node's type which does not exist on Barebox but directly
for device_type property set to "pci".

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

OF: convert of_translate_address to new API ...

This converts existing of_translate_address to recently added API. In
contrast to existing behavior, the new function honors ranges properties
properly. It now allows reg properties to be set as offset with respect
to the correspoding parent node.

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

OF: import address related functions from Linux OF API ...

This imports drivers/of/address.c from Linux with some minor modifications.
of_translate_address is not yet enabled and PCI and ISA related bus translations
have not been imported. Also, a corresponding include header is created with
prototypes and non-OF function stubs.

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