Commit Graph

30 Commits

Author SHA1 Message Date
Brian Norris b9adf469f8 mtd: partitions: make parsers return 'const' partition arrays
We only want to modify these arrays inside the parser "drivers", so the
drivers should construct them however they like, then return them as
immutable arrays.

This will make other refactorings easier.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:21:57 -08:00
Brian Norris c3168d26c8 mtd: ofpart: assign return argument exactly once
It's easier to refactor these parsers if the return value gets assigned
only once, just like every other MTD partition parser.

This prepares for making the second arg to the parse_fn() const. This is
OK if we construct the partitions completely first, and assign them to
the return pointer only after we're done modifying them.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:21:52 -08:00
Brian Norris 2027cba66a mtd: merge for-4.4 development into -next development
A few MAINTAINERS updates, and some DT binding/documentation fixups.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 10:00:34 -08:00
Brian Norris e488ca9f8d doc: dt: mtd: partitions: add compatible property to "partitions" node
As noted here [1], there are potentially future conflicts if we try to
use MTD's "partitions" subnode to describe anything besides just the
fixed-in-the-device-tree partitions currently described in this
document. Particularly, there was a proposal to use this node for the
AFS parser too.

It can pose a (small) problem to try to differentiate the following
nodes:

	// using binding as currently specified
	partitions {
		#address-cells = <x>;
		#size-cells = <y>;
		partition@0 {
			...;
		};
	};

and

	// proposed future binding
	partitions {
		compatible = "arm,arm-flash-structure";
	};

It's especially difficult if other uses of this node start having
subnodes.

So, since the "partitions" node is new in v4.4, let's fixup the binding
before release so that it requires a compatible property, so it's much
clearer to distinguish. e.g.:

	// proposed
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <x>;
		#size-cells = <y>;
		partition@0 {
			...;
		};
	};

[1] Subject: "mtd: create a partition type device tree binding"
    http://lkml.kernel.org/g/20151113220039.GA74382@google.com
    http://lists.infradead.org/pipermail/linux-mtd/2015-November/063355.html
    http://lists.infradead.org/pipermail/linux-mtd/2015-November/063364.html

Cc: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
2015-12-08 17:10:20 -08:00
Brian Norris 8c62b4e118 mtd: ofpart: don't complain about missing 'partitions' node too loudly
The ofpart partition parser might be run on DT-enabled systems that
don't have any "ofpart" partition subnodes at all, since "ofpart" is in
the default parser list. So don't complain loudly on every boot.

Example: using m25p80.c with no intent to use ofpart:

&spi2 {
	status = "okay";

	flash@0 {
		compatible = "jedec,spi-nor";
		reg = <0>;
	};
};

I see this warning:

[    0.588471] m25p80 spi2.0: gd25q32 (4096 Kbytes)
[    0.593091] spi2.0: 'partitions' subnode not found on /spi@ff130000/flash@0. Trying to parse direct subnodes as partitions.

Cc: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-03 17:50:36 -08:00
Brian Norris b8f70badb8 mtd: kill off MTD partition parser boilerplate
Most parsers can be handled with our new boilerplate-reducing macro.
There are a few that can't be (cmdlineparts and ofpart).

Also kill off the owner assignments, since register_mtd_parser() now
takes care of that.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 18:46:29 -08:00
Brian Norris e270bca531 mtd: ofpart: drop 'of_node' partition parser data
This field is no longer used anywhere, as it is superseded by
mtd->dev.of_node.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:59:04 -08:00
Brian Norris 3b6521eab0 mtd: ofpart: grab device tree node directly from master device node
It seems more logical to use a device node directly associated with the
MTD master device (i.e., mtd->dev.of_node field) rather than requiring
auxiliary partition parser information to be passed in by the driver in
a separate struct.

This patch supports the mtd->dev.of_node field and deprecates the parser
data 'of_node' field

Driver conversions may now follow.

Additional side benefit to assigning mtd->dev.of_node rather than using
parser data: the driver core will automatically create a device -> node
symlink for us.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-11-11 13:45:10 -08:00
Michal Suchanek 5cfdedb7b9 mtd: ofpart: move ofpart partitions to a dedicated dt node
Parsing direct subnodes of a mtd device as partitions is unreliable
since the mtd device is also part of its bus subsystem and can contain
bus data in subnodes.

Move ofpart data to a subnode of its own so it is clear which data is
part of the partition layout.

Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-10-30 14:01:39 -07:00
Axel Lin 6e14a61d41 mtd: make register_mtd_parser return void
register_mtd_parser never fails; hence make it return void.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-01-03 11:22:22 -08:00
Geert Uytterhoeven 26a6d240e2 mtd: make mtd_partition.name const
This allows to drop a few casts.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-01-03 11:22:09 -08:00
Wei Yongjun 60ea89e22a mtd: ofpart: use for_each_child_of_node() macro
Use for_each_child_of_node() macro instead of open coding it.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-08-30 21:52:57 +01:00
Josh Wu e79265ba6b mtd: ofpart: add compatible check for child nodes
In case that the nand device will support some features like Nand Flash
Controller, we want to make the sub feature as a sub node of nand device.

Use such organization it is easy to enable/disable feature, also it is back
compatible and more readable.

If the sub-node has a compatible property then it is a driver not partition.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
[ added a missing newline -Brian ]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-08-05 21:12:32 +01:00
Joe Schaack 05ff8c258c mtd: ofpart: support partitions of 4 GiB and larger
Previously, partitions were limited to less than 4 GiB in size because
the address and size were read as 32-bit values. Add support for 64-bit
values to support devices of 4 GiB and larger.

Signed-off-by: Joe Schaack <jschaack@xes-inc.com>
Signed-off-by: Nate Case <ncase@xes-inc.com>
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05 12:05:53 +01:00
Lubomir Rintel 422f3890a6 mtd: Allow removal of partitioning modules
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2013-02-04 09:27:33 +02:00
Josh Radel ab0b00bc6e mtd: ofpart: Replicate mtd cmdline "lk" option with device tree "lock" property
The mtd partition command line parser already supports a "lk" option to mask
MTD_POWERUP_LOCK. This extends that same functionality to device tree
partition specifications.

Signed-off-by: Josh Radel <jradel@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-22 10:14:22 +02:00
Sachin Kamat ecbcbc7b75 mtd: ofpart: Fix incorrect NULL check in parse_ofoldpart_partitions()
The pointer returned by kzalloc should be tested for NULL
to avoid potential NULL pointer dereference later. Incorrect
pointer was being tested for NULL. Bug introduced by commit fbcf62a3
(mtd: physmap_of: move parse_obsolete_partitions to become separate
parser).
This patch fixes this bug.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: stable@vger.kernel.org [3.2+]
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-11-15 15:37:46 +02:00
Dmitry Eremin-Solenikov 9786f6e68a mtd: ofpart: add ofoldpart alias
ofpart.ko also provides ofoldpart MTD parser. Add respective
MODULE_ALIAS("ofoldpart"); declaration.

Artem: improve the comment

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-09-11 15:02:14 +03:00
Dmitry Eremin-Solenikov d6137badef mtd: make ofpart buildable as a separate module
As ofpart now uses a standard mtd partitions parser interface, make it
buildable as a separate module. Also provide MODULE_DESCRIPTION and
MODULE_AUTHOR for this module.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-09-11 15:02:13 +03:00
Dmitry Eremin-Solenikov fbcf62a32b mtd: physmap_of: move parse_obsolete_partitions to become separate parser
Move parse_obsolete_partitions() to ofpart.c and register it as an
ofoldpart partitions parser.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-09-11 15:02:12 +03:00
Dmitry Eremin-Solenikov 628376fb53 mtd: drop of_mtd_parse_partitions()
All users have been converted to call of_mtd_parse_partitions through
parse_mtd_partitions() multiplexer. Drop obsolete API.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-09-11 15:02:12 +03:00
Dmitry Eremin-Solenikov d26c87d64e mtd: prepare to convert of_mtd_parse_partitions to partition parser
Prepare to convert of_mtd_parse_partitions() to usual partitions parser:
1) Register ofpart parser
2) Internally don't use passed device for error printing
3) Add device_node to mtd_part_parser_data struct
4) Move of_mtd_parse_partitions from __devinit to common text section
5) add ofpart to the default list of partition parsers

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
2011-09-11 15:02:10 +03:00
Ian Munsie 766f271a63 mtd: Fix endianness issues from device tree
This patch adds the appropriate conversions to correct the endianness
issues in the MTD driver whenever it accesses the device tree (which is
always big endian).

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2010-10-25 00:55:56 +01:00
David Woodhouse a1452a3771 mtd: Update copyright notices
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2010-08-08 20:58:20 +01:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Benjamin Krill ebd5a74db7 mtd: ofpart: Check availability of reg property instead of name property
The previous implementation breaks the dts binding "mtd-physmap.txt". This
implementation fixes the issue by checking the availability of the reg
property instead of the name property.

Cc: stable@kernel.org
Signed-off-by: Benjamin Krill <ben@codiert.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-09-19 14:14:48 -07:00
Benjamin Krill 4b08e149c0 [MTD] ofpart: Check name property to determine partition nodes.
SLOF has a further node which could not be evaluated
by the current routine. The current routine returns
because the node hasn't the required reg property. As
fix this patch adds a check to determine the partition
child nodes. If the node is not a partition the number
of total partitions will be decreased and loop continues
with the next nodes.

Signed-off-by: Benjamin Krill <ben@codiert.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-03-24 14:04:20 +00:00
Sebastian Andrzej Siewior 69fd3a8d09 [MTD] remove unused mtd parameter in of_mtd_parse_partitions()
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-13 15:01:42 +01:00
Adrian Bunk 950bcb2582 [MTD] mtd/ofpart.c: add MODULE_LICENSE
This patch adds the missing MODULE_LICENSE("GPL").

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-04-22 15:53:52 +01:00
Scott Wood 9a310d2119 [MTD] Factor out OF partition support from the NOR driver.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-02-03 18:06:48 +11:00