kernel/linux.git/drivers/mtd/ofpart.c, branch v4.4.8

doc: dt: mtd: partitions: add compatible property to "partitions" node

2015-12-09T01:10:20+00:00

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 = ; #size-cells = ; 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 = ; #size-cells = ; 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 Signed-off-by: Brian Norris Acked-by: Rob Herring

mtd: ofpart: don't complain about missing 'partitions' node too loudly

2015-12-04T01:50:36+00:00

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 Signed-off-by: Brian Norris

mtd: ofpart: move ofpart partitions to a dedicated dt node

2015-10-30T21:01:39+00:00

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 Signed-off-by: Brian Norris

mtd: make register_mtd_parser return void

2014-01-03T19:22:22+00:00

register_mtd_parser never fails; hence make it return void. Signed-off-by: Axel Lin Signed-off-by: Brian Norris

mtd: make mtd_partition.name const

2014-01-03T19:22:09+00:00

This allows to drop a few casts. Signed-off-by: Geert Uytterhoeven Signed-off-by: Brian Norris

mtd: ofpart: use for_each_child_of_node() macro

2013-08-30T20:52:57+00:00

Use for_each_child_of_node() macro instead of open coding it. Signed-off-by: Wei Yongjun Acked-by: Huang Shijie Signed-off-by: David Woodhouse

mtd: ofpart: add compatible check for child nodes

2013-08-05T20:12:32+00:00

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 Acked-by: Brian Norris Acked-by: Jean-Christophe PLAGNIOL-VILLARD Signed-off-by: Artem Bityutskiy [ added a missing newline -Brian ] Signed-off-by: Brian Norris Signed-off-by: David Woodhouse

mtd: ofpart: support partitions of 4 GiB and larger

2013-04-05T11:05:53+00:00

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 Signed-off-by: Nate Case Signed-off-by: Aaron Sierra Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse

mtd: Allow removal of partitioning modules

2013-02-04T07:27:33+00:00

Signed-off-by: Lubomir Rintel Signed-off-by: Artem Bityutskiy

mtd: ofpart: Replicate mtd cmdline "lk" option with device tree "lock" property

2012-11-22T08:14:22+00:00

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 Signed-off-by: Artem Bityutskiy