ARM: Remove kernel booting call for thumb2 mode ...

The asm code to do the actual call into the kernel (or another
barebox) when compiled in thumb2 mode isn't necessary.  gcc generates
a perfectly good calling sequence from a normal function pointer call.
If it didn't, the code in bootstrap_boot() that uses a function
pointer to jump to the 2nd stage barebox from an xloader wouldn't
work.

It appears to be allowed that the call to kernel() could return, as
neither start_linux() nor kernel() are marked noreturn, and there is
code after calls to start_linux().

The asm code has a bug in this case, as it uses bx and not blx, and
thus doesn't set the link register.  Since it's a tail call, this
would be okay, but only if the LR value from the start of
start_linux() (and the callee-saved registers) are restored
beforehand, which isn't done.  The gcc generated call sequence will do
this.

Signed-off-by: Trent Piepho <tpiepho@kymetacorp.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

net: tap: fix whitespaces ...

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

net: tap: make locally used functions static ...

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

Revert "memtest: move error handling to end of function" ...

While this simplifies the code as is I got the request to continue on
errors in memtest, which can be better implemented when the messages are
printed inline and not at the end of the function.

This reverts commit 4ff9e28.

eukrea-cpuimx35: update defconfig ...

enable chipidea usb driver

Signed-off-by: Florian Vallee <fvallee@eukrea.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

eukrea-cpuimx35: setup usb through chipidea-imx driver ...

OTG and HOST port are tested with a mass storage device.

Signed-off-by: Florian Vallee <fvallee@eukrea.fr>
Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

imx35: register usb-misc by default ...

Signed-off-by: Florian Vallee <fvallee@eukrea.fr>
Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

environment: support env on at24 eeprom ...

unprotect(), erase() and protect() return EOPNOTSUPP errno code
for at24 I2C eeproms, so envfs_save() doesn't store data
to these eeproms without this patch.

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

defaultenv: boot/net: Boot initramfs from tftp if present ...

Use an 'initramfs' file if it exists instead of nfsroot. This offers the
possibility to quickly boot complete filesystems as initramfs without
the need to flash an SD-card or similar. If the initramfs does not
exist, it uses the default nfsroot mechanism.

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

driver: make all dev_request_mem_region_* routines MIPS compatible ...

Use IOMEM() macro in all dev_request_mem_region_* routines to allow
the proper mapping on all platforms.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

spi: i.MX: optimize transfers for ECSPI v2.3 ...

Instead of writing one word to the txfifo and then wait until
one is received in the rxfifo we can write while the txfifos
are not full and read as long the rxfifos contain data. This
makes transfers for the m25p80 driver around 7 times faster
here.

Unlike the last version this time we only optimize the common
case with 8 bits per word and SPI_LSB_FIRST cleared. The other
cases would require more bit shuffling of the data.

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

video: i.MX IPUv3: Set ldb clocks correctly ...

The clocks for the LVDS display bridge have a fixed /3.5 and a
configurable /1,/2 divider in their path. The configurable divider has
to be explicitly configured for single/dual channel support, so we can't
rely on clock rate parent propagation here. Clear the
CLK_SET_RATE_PARENT flag for the configurable divider and configure the
clock explicitly in the ldb driver.
Tested on a custom i.MX6 board, currently untested on i.MX53.

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

ARM: mx6sx-sabresdb: set proper hostname ...

Also move the initcall to the level matching the name of the
function.

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

ARM: mx6sx-sabresdb: drop unneeded makefile rules ...

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

wdog: imx-wd: watchdog cannot be disabled again ...

The i.MX21/i.MX6 watchdog cannot be disabled after it was activated.
Bit 2 (WDE) cannot be set to 0 again. Notify the user about that by
returning -ENOSYS.

Signed-off-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: backend_raw: add hmac support ...

This patch adds hmac support to the raw backend.

With this patch, modifications of the header or data of a state partition can
be detected, as the hmac woudln't match anymore. The hmac relies on a shared
secret, which is requested from the keystore, with keystore_get_secret() using
the name of the state partition as the "name" of the secret.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: prepare raw backend for hmac support ...

This patch cleans up the raw backend, so that adding hmac support in the next
patch is easier.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

crypto: add simple keystore ...

This patch adds a simple keystore to barebox. The keystore implements a simple
key-value store to hold arbitrary values.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

crypto: Kconfig: add submenu for crypto related config options ...

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: disable load command ...

Explicitly loading environment is not required as it will be loaded if
available during device probing

Signed-off-by: Enrico Jorns <ejo@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: use name of device node as name if alias is not available ...

Wihtout this patch, when using more than one state device an alias is
mandatory, otherwise the there will be two state devices with the name state.

This patch fixes the limitation by using the device node's name if no alias is
defined.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: make use of of_find_path_by_node() and add return -EPROBE_DEFER if device is not available ...

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

of_path: add of_find_path_by_node() ...

This patch adds the function of_find_path_by_node(), which is similar to
of_find_path(), but it translates a device tree node into a barebox device path
directly.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

of_path: of_find_path() factor out device detection logic into separate function ...

This patch factors out the device detection logic into separate function, so
that it can be used from another function.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: import optimized string functions from Linux ...

10x performance gain according to simple test on QEMU malta:
barebox:/ time memcpy 0xa0000000 0xa0001000 0x100000

Signed-off-by: Aleksey Kuleshov <rndfax@yandex.ru>
Acked-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

eeprom: Support pagesize OF device tree property ...

Allows specifying the page size when the eeproms are in the device
tree.  Same as the Linux kernel device-tree bindings for at24.

Signed-off-by: Trent Piepho <tpiepho@kymetacorp.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

eeprom: Add support for 24c1025 EEPROM ...

This is the Microchip version of the Atmel 24c1024, which is already
supported.  The key difference between them is that the I2C address
bit used to select between the two banks is bit 2 for the 1025 and not
bit 0 as in the 1024.

Add a flag to describe this difference.

Signed-off-by: Trent Piepho <tpiepho@kymetacorp.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: core: initialize *retlen in mtd_write() ...

Some mtd drivers like the spi-nor driver do not assign a value
to the retlen pointer but instead only add the bytes written
to *retlen. Users of mtd_write expect the variable to be initialized
by the mtd core though, so we have to do it in mtd_write(). The
same is done in mtd_read already.

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

reset: Add gpio reset support ...

If a device has the reset-gpios property we can support this through
the reset controller API, so drivers do not have to open code the
support for this property each time themselves as done a few dozen times
in the kernel.

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

reset: Remove unused *_optional functions ...

Since we now have dummy reset controllers we no longer need the
*_optional functions. These have been unused anyway, so just remove
them.

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