of: of_find_node_by_devpath: Fix offset in mtd devices ...

When a cdev is a mtd device the partition offset must be used from
there, not from the cdev.

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

mtd: of: only add partition layout param when GLOBAL support is enabled ...

Fixes: a2fa18f9f483 (mtd: of: Make used partition binding configurable)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: of_path: add of_find_node_by_devpath() ...

We already have of_find_path_by_node() which finds a device path
for a given device node. This is used by the state framework to
find its backend path. This path has to be translated back to
a device node when Linux is started. The current approach turned
out to be too simple: We assumed that the node path is the same
in the tree Linux is started with. This is not true in several
cases:
- partition nodes should have the name "partition@<offset>", but
  in several trees they have "partition@<num>"
- There are two different partition bindings: The legacy binding
  and the new one with an additional partitions subnode which has
  a compatible = "fixed-partitions" property.
The node path only stays the same when the internal tree uses the
same bindings and node names as the tree Linux is started with.

To overcome this limitation we create of_find_node_by_devpath()
which converts the device path back to a device node. It does
so by finding the device node of the hardware device rather than
the partition node. It then parses over the partitions in this
device node with the known bindings looking for a partition which
matches in offset and size to the barebox partition.

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

of: partitions: flag partitions from a partition table ...

We are going to call the of_partition_fixup for regular block
devices like MMC/SD aswell. Add a flag to partitions indicating
they are instanciated from a on-disk partition table so that they
won't be added as device tree partitions during fixup.

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

of: partition: only create partition node when partitions exist ...

With the legacy partition binding we did not modify the device
node when no partition exist, but with the new binding we would
create the "partitions" node with compatible = "fixed-partitions".
Prevent that by catching the absence of partitions early.

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

of: partition: Make partition fixup independent from mtd devices ...

The of partition parser is not only used for mtd device, but also
for regular block devices, so make the of_mtd_fixup code independent
of mtd devices also, so that other devices can be fixed up, too.

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

of: partition: support 64bit partition sizes ...

Do not assume that #address-cells and #size-cells are
both 1. Parse them appropriately to support devices
> 4GuB.

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

mtd: of: Make used partition binding configurable ...

So far we used the legacy partition binding when fixing up the
mtd partition nodes. Change this to default to the new binding
with a "partitions" submode. Make this behaviour configurable
though: This creates a new of_binding device variable for
mtd devices. This can be set to:

- "new": Use the new partition binding (default)
- "legacy": Use the old partition binding
- "donttouch": Do not touch the partition node

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

of: partition: Move of_mtd_fixup to drivers/of/ ...

Move the fixup code where the parser code is already.
Since the code will not only be used for mtd in the future
drivers/of/ is a better place than drivers/mtd/.

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

treewide: Use of_property_write_string() where appropriate ...

Replace users which use of_set_property() to set a property to a string
with of_property_write_string().

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

of: Add of_property_write_string() ...

Setting a property to a string is used many times. Create a convenience
function for it.

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

Merge branch 'for-next/efi'

of: base: Use scoring in DT device matching ...

Port Linux kernel algorithm for both of_device_is_compatible() and
of_match_node(). With this change former now returns a score on the
scale of 0 to INT_MAX/2, and the latter goes through all compatiblity
entries and selects the entry that has the best matching score.

This is needed for SoCs where IP blocks are backwards compatible and
corresponding OF nodes can proclaim compatibility with several entries
found in driver's compatiblity table. One such example would be PIO
pinctrl block on AT91SAM9x5 SoCs which declare compatibility with with
both "atmel,at91sam9x5-pinctrl" and "atmel,at91rm9200-pinctrl".

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

efi: move x86 efi boot support to x86 arch ...

prepare to drop the efi arch as efi boot up is not arch sepecific

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

Merge branch 'for-next/imx'

of: partitions: force "partitions" subnode ...

The binding states that a subnode containing partition subnodes
should have the name "partitions". Enforce this so that we do not
parse nodes with other names which may have partition descriptions
for other disks.

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

of_path: only handle no driver for device if it is on a bus ...

This fixes a regression in __of_find_path() for flash devices created by
the cadence-quadspi driver, which do not have 'dev->driver' set.  Such
devices do not have 'dev->bus' set either, so we can use that to qualify
the existing test.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of: Use %pa to print resource_size_t type ...

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

of: base: add chosen node if it does not exist when adding initrd ...

If the chosen node does not exist, of_add_initrd fails to pass the
initrd to the kernel. Instead it should create the chosen node, just
like of_fixup_bootargs does.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/state'

Merge branch 'for-next/misc'

of: of_find_path: Add support for new partition binding ...

The partitions now may be in a subnode of the actual device node.
Eventually go another step up in the hierarchy if required.

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

of: partitions: Support new binding ...

The new binding recommends to put the partitions into a subnode
with compatible "fixed-partitions". Add support for this binding.

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

of_path: handle no driver for device ...

in __of_find_path it can happen that there is a device, but there
is no driver for this device because it hasn't been probed yet.
Return -ENODEV in this case to let the caller know that it has to
try later again.

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

of: fix typos ...

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

of: base: import of_get_cpu_node() from linux-v4.7-rc2 ...

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

Merge branch 'for-next/misc'

of: Add missing include ...

drivers/of/device.c has the implementation for of_match_device(), so
also include the header which has the prototype.

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

of: base: Match simple-mfd devices ...

Some simple-buses are now considered to be simple-mfd devices. Match
them aswell.

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

Merge branch 'for-next/pci'