state: always store state when --init is given ...

When asked to initialize the state with the --init option
actually store the state, even when no variable is modified.

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

state: describe backend with phandle ...

We used to describe the backend with a combination of a nodepath
and partname:<name>. This is cumbersome and error prone to parse.
Instead, describe the backend with a phandle that directly points
to the partition. The resulting code is easier to read and the
devicetrees are easier to understand. Tested with both mtd and
EEPROM device, both with partitions with an offset != 0.

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

libdt: remove a leftover from somewhere ...

This implementation of 'pr_debug' does not need a device...

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

libtd: fix typo ...

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

state: fix state handling for devices without needed erase ...

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

state: also test if S_ISBLK ...

st_size for mmcblkX devices is 0, the offset + size check will therefore fail.

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

2nd commit ...

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