of: Add function to find the same node in another tree ...

For our device tree fixups we have to find a node corresponding to
another node in another device tree. We used to use the full name
to match the nodes, but this falls apart when nodes get renamed
or for example a new bus hierarchy is introduced. To make this
more robust we create reproducible names from device nodes which
mostly depend on the address in MMIO space, the reg property and
as a last resort the name of the device node.

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

reset: add missing stub for reset_control_get ...

Fixes: 45b95b50cd0b (reset: add reset controller framework)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

mci: drop unused parameter from mci_switch() ...

The SWITCH command has two purposes:
 a) switch the command set
 b) Write to the EXT_CSD register

If the access field (bits [25:24]) in the argument are b00, we're in
case a), otherwise in b). As mci_switch() always passes
MMC_SWITCH_MODE_WRITE_BYTE (0b3) in the access field, only case b) is
relevant here. According to the eMMC specification[1] the command set
field is ignored in case b) and so the respective parameter (that is
unused already now) can be dropped.

[1] Embedded Multi-Media Card (e•MMC) Electrical Standard (5.1),
    February 2015; paragraph 6.6.1

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

FIT: export fit_open_configuration() and fit_open_image() ...

Currently only fit_open() is exported which only opens the predefined
images "kernel", "dtb" and "ramdisk". To make the FIT code more usable
for other code which may want to open other images export
fit_open_configuration() and fit_open_image().

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

file_list: Add ubi flag ...

This flag is added to better support flashing UBI image with Android
sparse images. Android fastboot splits images which are bigger than the
free memory into multiple images which are then transferred in multiple
fastboot sessions. In a session which is not the first one we can no
longer detect if an image is a UBI image or not, so we need a flag to
make this explicit.

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

filetype: Add fastboot sparse format detection ...

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

Add support for fastboot sparse images ...

This adds support for reading Android fastboot sparse images. This
code is based on the corresponding U-Boot code, but has been heavily
modified to provide a read-like API which better fits into barebox.

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

parseopt: introduce parseopt_u16() and parseopt_str() ...

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

include/parseopt.h: add guard macro ...

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

move parseopt to lib/ ...

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

of: base: use root_node compatible as suggestion for a hostname ...

on some SoCs we can use generic PLL and RAM initialization. In this
cases we create board file only to provide a host name.
With this patch host name will be created from device tree compatible.
For example:
 compatible = "board_vendor,board", "chip_vendor,soc"
the host name will be:
 "board"

This function will not overwrite a host name which is already set by
board or machine code.

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

ubiformat: Add ubiformat write function ...

The ubiformat C API expects an image file as argument. With upcoming
Android fastboot sparse image support we can no longer provide a
complete image anymore. With this patch we can write an image in
multiple chunks after we've formatted a MTD device with ubiformat.

ubiformat_write will skip the EC header in both the MTD device we
write to and also the image we read from, so we can flash an image
on a MTD device containing EC headers already.

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

fs: implement ftruncate ...

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

linux/kernel.h: move ALIGN_DOWN() to include/linux/kernel.h ...

Linux commit ed067d4a859f ("linux/kernel.h: Add ALIGN_DOWN macro")
moved ALIGN_DOWN to include/linux/kernel.h.

Let's do likewise.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

string.h: Implement strndup ...

I implemented this while trying to import mmc-utils into barebox. While
I didn't finish this import this function might still be useful for
someone?!

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

Merge branch 'for-next/net'

Merge branch 'for-next/misc'

net: Add linuxdevname property ...

When you have a static network environment but more than one network
device on your machine it is necessary to provide the <device> parameter
to the ip parameter at kernel cmd line.

The device name assigned by Linux cannot in general be predicted as it
depends on driver bind order.

This patch introduces a new property linux.devname to eth devices.
The value is added to bootargs per interface and can be changed in
env/network/INTF

Based on patch by Gavin Schenk <g.schenk@eckelmann.de>.

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

net: Provide new way to configure network devices ...

This provides a new way to configure network interfaces based
on nvvars. A network interface can now be configured with variables
in the nv.dev.<ethname>.* namespace. There is a new network device
parameter "mode" which specifies the mode used to obtain IP settings.
The mode can be "dhcp", "static" or "disabled":

nv.dev.eth0.mode=dhcp
(ipaddr, netmask are ignored in this setting)

nv.dev.eth0.mode=static
nv.dev.eth0.ipaddr=192.168.0.17
nv.dev.eth0.netmask=255.255.0.0

nv.dev.eth0.mode=disabled

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

net: remove "current" network device ...

Now that we can do routing we no longer need a "current"
network device. Remove it.

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

net: Pick network device based on IP settings ...

The IP/netmask/gateway settings contain all informations
needed to pick the correct network device. This patch
adds support for that and makes specifying the "current"
network interface using the ethact command unnecessary.

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

net: dhcp: rework ...

The DHCP code is a mess. It is not clear which options are sent to the
server and which options are returned from the server. Also environment
variables are read from and written to all over the place.

This patch cleans this up. There now is struct dhcp_req_param which is
used for options sent to the server and struct dhcp_result which contains
the values sent from the server. The values from the server are written
to the barebox variables in a single place. Also it's now possible to
call the dhcp code without modifying barebox variables at all, storing
the result only in the dhcp result struct.

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

net: dhcp: Allow to specify network device ...

Instead of allowing to DHCP only on the "current" network
device, allow to specify the desired network device. This
is a first step to get rid of the concept of a "current"
network device.

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

fs: Introduce devpath_to_name() ...

Add a simple function to simplify the task of accepting both full path
in "/dev" and just device name as a parameter.

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

net: mdio-mux: Avoid probing multiplexed busses ...

Calling mdiobus_detect() for a bus that serves as a parent for a MDIO
bus multiplexer would result in parent bus being populated with
devices that are present on downstream bus that multiplexer happens to
be "pointing" at that moment. To avoid that introduce 'is_multiplexed'
flag to struct mii_bus and change mdiobus_detect to ignore busses for
which that flag is set.

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

net: phy: Port MDIO bus miltiplexer framework from Linux kernel ...

Port mdio-mux.c from Linux kernel to Barebox, to support adding
dirvers that rely on that infrastructure/API.

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

mdio_bus: Port of_mdio_find_bus() from Linux kernel ...

Port of_mdio_find_bus() from Linux kernel. This function is used in
MDIO multiplexor infrastructure added in following commit.

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

net: allow udp connections on specified network device ...

This allows the DHCP code to configure specific network
devices so that DHCP no longer depends on any "current"
network device.

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

net: Use a single gateway ...

There is not much point in having a network device specific
gateway. If barebox really is part of such a complicated network
in which it needs multiple gateways, then we probably need a
real routing table. Until this happens, a single gateway should
be enough.

This introduces global.net.gateway which holds the gateway ip. The
previously used device specific <ethx>.gateway variables still exist,
but are only aliases for the single gateway.

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