Merge tag 'mtd/for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux

Pull MTD updates from Miquel Raynal:
"MTD changes:

- mtdconcat finally makes it in, after several years of bei

Merge tag 'mtd/for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux

Pull MTD updates from Miquel Raynal:
"MTD changes:

- mtdconcat finally makes it in, after several years of being merged
and reverted

- Baikal SoC support is being removed, so MTD bits are being removed
as well

- misc cleanups

NAND changes:

- SunXi driver support for new versions of the Allwinner NAND
controller.

- DT-binding improvements and cleanups.

- A few fixes (Realtek ECC and Winbond SPI NAND), aside with the
usual load of misc changes.

SPI NOR fixes:

- Enable die erase on MT35XU02GCBA. We knew this flash needed this
fixup since 7f77c561e227 ("mtd: spi-nor: micron-st: add TODO for
fixing mt35xu02gcba") but did not add it due to lack of hardware to
test on.

- Fix locking on some Winbond w25q series flashes.

- Fix Auto Address Increment (AAI) writes on SST that flashes that
start on odd address. The write enable latch needs to be set again
after the single byte program"

* tag 'mtd/for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (44 commits)
mtd: spinand: winbond: Declare the QE bit on W25NxxJW
mtd: spi-nor: micron-st: Enable die erase support for MT35XU02GCBA
mtd: spi-nor: winbond: Fix locking support for w25q256jw
mtd: spi-nor: sst: Fix write enable before AAI sequence
mtd: spi-nor: winbond: Fix locking support for w25q64jvm
mtd: spi-nor: winbond: Fix locking support for w25q256jwm
dt-bindings: mtd: mxc-nand: add missing compatible string and ref to nand-controller-legacy.yaml
dt-bindings: mtd: gpmi-nand: ref to nand-controller-legacy.yaml
dt-bindings: mtd: refactor NAND bindings and add nand-controller-legacy.yaml
mtd: spinand: winbond: Clarify when to enable the HS bit
mtd: rawnand: sunxi: introduce maximize variable user data length
mtd: rawnand: sunxi: fix typos in comments
mtd: rawnand: sunxi: change error prone variable name
mtd: rawnand: sunxi: remove dead code
mtd: rawnand: sunxi: make the code more self-explanatory
mtd: rawnand: sunxi: replace hard coded value by a define - take2
mtd: rawnand: sunxi: do not count BBM bytes twice
mtd: rawnand: sunxi: fix sunxi_nfc_hw_ecc_read_extra_oob
mtd: rawnand: sunxi: sunxi_nand_ooblayout_free code clarification
mtd: cmdlinepart: use a flexible array member
...

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mtd: concat: replace alloc + calloc with 1 alloc

A flex array can be used to reduce the allocation to 1.

And actually mtdconcat was using the pointer + 1 trick to point to the
overallocated area. B

mtd: concat: replace alloc + calloc with 1 alloc

A flex array can be used to reduce the allocation to 1.

And actually mtdconcat was using the pointer + 1 trick to point to the
overallocated area. Better alternatives exist.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

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mtd: virt_concat: use single allocation for node

Simpler to reason about and avoids having to free nodes separately.

Also add __counted_by attribute for extra runtime analysis.

Signed-off-by: Rose

mtd: virt_concat: use single allocation for node

Simpler to reason about and avoids having to free nodes separately.

Also add __counted_by attribute for extra runtime analysis.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

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mtd: virt_concat: fix kdoc text

The function name in the kdoc comment is different from the name of the
function being documented, fix it.

Fixes: 43db6366fc2d ("mtd: Add driver for concatenating de

mtd: virt_concat: fix kdoc text

The function name in the kdoc comment is different from the name of the
function being documented, fix it.

Fixes: 43db6366fc2d ("mtd: Add driver for concatenating devices")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202603041232.fNDHNtUa-lkp@intel.com/
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

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mtd: Add driver for concatenating devices

Introducing CONFIG_MTD_VIRT_CONCAT to separate the legacy flow from the new
approach, where only the concatenated partition is registered as an MTD
device,

mtd: Add driver for concatenating devices

Introducing CONFIG_MTD_VIRT_CONCAT to separate the legacy flow from the new
approach, where only the concatenated partition is registered as an MTD
device, while the individual partitions that form it are not registered
independently, as they are typically not required by the user.
CONFIG_MTD_VIRT_CONCAT is a boolean configuration option that depends on
CONFIG_MTD_PARTITIONED_MASTER. When enabled, it allows flash nodes to be
exposed as individual MTD devices along with the other partitions.

The solution focuses on fixed-partitions description only as it depends on
device boundaries. It supports multiple sets of concatenated devices, each
comprising two or more partitions.

flash@0 {
reg = <0>;
partitions {
compatible = "fixed-partitions";

part0@0 {
part-concat-next = <&flash0_part1>;
label = "part0_0";
reg = <0x0 0x800000>;
};

flash0_part1: part1@800000 {
label = "part0_1";
reg = <800000 0x800000>;
};

part2@1000000 {
part-concat-next = <&flash1_part0>;
label = "part0_2";
reg = <0x800000 0x800000>;
};
};
};

flash@1 {
reg = <1>;
partitions {
compatible = "fixed-partitions";

flash1_part0: part1@0 {
label = "part1_0";
reg = <0x0 0x800000>;
};

part1@800000 {
label = "part1_1";
reg = <0x800000 0x800000>;
};
};
};

The partitions that gets created are

flash@0
part0_0-part0_1-concat
flash@1
part1_1
part0_2-part1_0-concat

Suggested-by: Bernhard Frauendienst <kernel@nospam.obeliks.de>
Suggested-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

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