libdt: of_read_devicetree(): try to read fdt from /sys/firmware/fdt first ...

Which is faster than walking over the filesystem representation of the device
tree in /proc or /sys.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

libdt: fix printf related bugs ...

src/libdt.c:97:11: warning: format string is not a string literal (potentially insecure) [-Wformat-security]
                        printf(data);
                               ^~~~
src/libdt.c:2241:5: warning: data argument not used by format string [-Wformat-extra-args]
                                node->full_name);
                                ^
src/libdt.c:2248:54: warning: more '%' conversions than data arguments [-Wformat]
                fprintf(stderr, "%s: no 'label' property found in %s\n", partition_node->full_name);
                                                                  ~^

Signed-off-by: Marc Kleine-Budde <mkl@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>

scan_proc_dir: Add missing phandle initialization ...

node->phandle was not set when /proc/device-tree was read.

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

Add some comments ...

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

remove dos partition parser ...

Instead of matching DOS partitions with partname:<number> this
should be made explicit with a different type parser, like dospartid:<id>.
Since this is unused just remove it for now.

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

document of_parse_partition_from_path ...

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

libdt: fix whitespace damage ...

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

libdt: add sysattr for partition ...

mmc devices only have a "name" property that reads 00000.
The partitions have a property "partition" telling the
partition index.

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

libdt: refactor partition parsing ...

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

libdt: search for devnode if partition not found ...

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

libdt: add function to search the devicenode in subdirs ...

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

libdt: fix segfault ...

strdup will segfault, if udev_device_get_devnode does not find the part.

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>