mtd: remove lart flash driver

The sa1100 lart platform was removed, so its flash driver is
no longer useful.

Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Miquel Raynal <miquel.raynal

mtd: remove lart flash driver

The sa1100 lart platform was removed, so its flash driver is
no longer useful.

Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]

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mtd: devices: add support for microchip 48l640 EERAM

The Microchip 48l640 is a 8KByte EERAM connected via SPI.

Signed-off-by: Heiko Schocher <[email protected]>
Tested-by: Fabio Estevam <[email protected]>

mtd: devices: add support for microchip 48l640 EERAM

The Microchip 48l640 is a 8KByte EERAM connected via SPI.

Signed-off-by: Heiko Schocher <[email protected]>
Tested-by: Fabio Estevam <[email protected]>
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]

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mtd: spear_smi: Enable compile testing

This driver does not contain any architecture specific code, enable
compile testing it.

Signed-off-by: Miquel Raynal <[email protected]>
Link: https:/

mtd: spear_smi: Enable compile testing

This driver does not contain any architecture specific code, enable
compile testing it.

Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/[email protected]

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mtd: spi-nor: Move m25p80 code in spi-nor.c

The m25p80 driver is actually a generic wrapper around the spi-mem
layer. Not only the driver name is misleading, but we'd expect such a
common logic to b

mtd: spi-nor: Move m25p80 code in spi-nor.c

The m25p80 driver is actually a generic wrapper around the spi-mem
layer. Not only the driver name is misleading, but we'd expect such a
common logic to be directly available in the core. Another reason for
moving this code is that SPI NOR controller drivers should
progressively be replaced by SPI controller drivers implementing the
spi_mem_ops interface, and when the conversion is done, we should have
a single spi-nor driver directly interfacing with the spi-mem layer.

While moving the code we also fix a longstanding issue when
non-DMA-able buffers are passed by the MTD layer.

Signed-off-by: Boris Brezillon <[email protected]>
Signed-off-by: Vignesh Raghavendra <[email protected]>
Signed-off-by: Tudor Ambarus <[email protected]>

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docs: kbuild: convert docs to ReST and rename to *.rst

The kbuild documentation clearly shows that the documents
there are written at different times: some use markdown,
some use their own peculiar

docs: kbuild: convert docs to ReST and rename to *.rst

The kbuild documentation clearly shows that the documents
there are written at different times: some use markdown,
some use their own peculiar logic to split sections.

Convert everything to ReST without affecting too much
the author's style and avoiding adding uneeded markups.

The conversion is actually:
- add blank lines and identation in order to identify paragraphs;
- fix tables markups;
- add some lists markups;
- mark literal blocks;
- adjust title markups.

At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.

Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>

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treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project

treewide: Add SPDX license identifier - Makefile/Kconfig

Add SPDX license identifiers to all Make/Kconfig files which:

- Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

GPL-2.0-only

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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mtd: nand: Clarify Kconfig entry for software BCH ECC algorithm

There is no point in having two distinct entries, merge them and
rename the symbol for more clarity: MTD_NAND_ECC_SW_BCH

Signed-off-b

mtd: nand: Clarify Kconfig entry for software BCH ECC algorithm

There is no point in having two distinct entries, merge them and
rename the symbol for more clarity: MTD_NAND_ECC_SW_BCH

Signed-off-by: Miquel Raynal <[email protected]>

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mtd: docg3: don't set conflicting BCH_CONST_PARAMS option

I noticed during the creation of another bugfix that the BCH_CONST_PARAMS
option that is set by DOCG3 breaks setting variable parameters for

mtd: docg3: don't set conflicting BCH_CONST_PARAMS option

I noticed during the creation of another bugfix that the BCH_CONST_PARAMS
option that is set by DOCG3 breaks setting variable parameters for any
other users of the BCH library code.

The only other user we have today is the MTD_NAND software BCH
implementation (most flash controllers use hardware BCH these days
and are not affected). I considered removing BCH_CONST_PARAMS entirely
because of the inherent conflict, but according to the description in
lib/bch.c there is a significant performance benefit in keeping it.

To avoid the immediate problem of the conflict between MTD_NAND_BCH
and DOCG3, this only sets the constant parameters if MTD_NAND_BCH
is disabled, which should fix the problem for all cases that
are affected. This should also work for all stable kernels.

Note that there is only one machine that actually seems to use the
DOCG3 driver (arch/arm/mach-pxa/mioa701.c), so most users should have
the driver disabled, but it almost certainly shows up if we wanted
to test random kernels on machines that use software BCH in MTD.

Fixes: d13d19ece39f ("mtd: docg3: add ECC correction code")
Cc: [email protected]
Cc: Robert Jarzmik <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Boris Brezillon <[email protected]>

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mtd: Make Kconfig formatting consistent

Fix indentation and replace '---help---' by 'help' to make things
consistent.

Signed-off-by: Boris Brezillon <[email protected]>
Reviewed-by: Mique

mtd: Make Kconfig formatting consistent

Fix indentation and replace '---help---' by 'help' to make things
consistent.

Signed-off-by: Boris Brezillon <[email protected]>
Reviewed-by: Miquel Raynal <[email protected]>

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mtd: spi-nor: Use the spi_mem_xx() API

The spi_mem_xxx() API has been introduced to replace the
spi_flash_read() one. Make use of it so we can get rid of
spi_flash_read().

Note that using spi_mem_x

mtd: spi-nor: Use the spi_mem_xx() API

The spi_mem_xxx() API has been introduced to replace the
spi_flash_read() one. Make use of it so we can get rid of
spi_flash_read().

Note that using spi_mem_xx() also simplifies the code because this API
takes care of using the regular spi_sync() interface when the optimized
->mem_ops interface is not implemented by the controller.

Signed-off-by: Boris Brezillon <[email protected]>
Reviewed-by: Frieder Schrempf <[email protected]>
Tested-by: Frieder Schrempf <[email protected]>
Signed-off-by: Mark Brown <[email protected]>

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mtd: mchp23k256: Add driver for this SPI SRAM device

The Microchip 23k256 is a 32K Byte SRAM connected via SPI.

Signed-off-by: Andrew Lunn <[email protected]>
Reviewed-by: Boris Brezillon <boris.brezi

mtd: mchp23k256: Add driver for this SPI SRAM device

The Microchip 23k256 is a 32K Byte SRAM connected via SPI.

Signed-off-by: Andrew Lunn <[email protected]>
Reviewed-by: Boris Brezillon <[email protected]>
Reviewed-by: Cyrille Pitchen <[email protected]>
[Brian: fixed copyright to be in this millenium]
Signed-off-by: Brian Norris <[email protected]>

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mtd: add arch dependency for MTD_BCM47XXSFLASH symbol

We dropped strict MIPS dependency for bcm47xxsflash driver in:
commit 5651d6aaf489 ("mtd: bcm47xxsflash: use ioremap_cache() instead of
KSEG0ADD

mtd: add arch dependency for MTD_BCM47XXSFLASH symbol

We dropped strict MIPS dependency for bcm47xxsflash driver in:
commit 5651d6aaf489 ("mtd: bcm47xxsflash: use ioremap_cache() instead of
KSEG0ADDR()") but using ioremap_cache still limits building it to few
selected architectures only.

A recent commit 57d8f7dd2132 ("bcma: allow enabling serial flash support
on non-MIPS SoCs") automatically dropped MIPS dependency for
MTD_BCM47XXSFLASH which broke building e.g. on powerpc and cris.

The bcma change is alright as it doesn't break building bcma code in any
way. MTD_BCM47XXSFLASH on the other hand should be limited to archs
which need it and can build it (by providing ioremap_cache).

Fixes: 57d8f7dd2132 ("bcma: allow enabling serial flash support on non-MIPS SoCs")
Signed-off-by: Rafał Miłecki <[email protected]>
Cc: Brian Norris <[email protected]>
Acked-by: Brian Norris <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>

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mtd: update description of MTD_BCM47XXSFLASH symbol

For years now we support writing to BCMA SoC serial flash, so don't
describe this driver as providing read-only support anymore.

Signed-off-by: R

mtd: update description of MTD_BCM47XXSFLASH symbol

For years now we support writing to BCMA SoC serial flash, so don't
describe this driver as providing read-only support anymore.

Signed-off-by: Rafał Miłecki <[email protected]>
Signed-off-by: Brian Norris <[email protected]>

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mtd: Remove unused symbol CONFIG_MTDRAM_ABS_POS

This has been unused, except as the condition for a fatal error, since
commit c13cbf3b5086 ("[MTD] mtdram: Quick cleanup of the driver:") in
2.6.13 (!

mtd: Remove unused symbol CONFIG_MTDRAM_ABS_POS

This has been unused, except as the condition for a fatal error, since
commit c13cbf3b5086 ("[MTD] mtdram: Quick cleanup of the driver:") in
2.6.13 (!).

Signed-off-by: Ben Hutchings <[email protected]>
Acked-by: Jesper Nilsson <[email protected]>
Signed-off-by: Brian Norris <[email protected]>

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mtd: powernv: Add powernv flash MTD abstraction driver

Powerpc powernv platforms allow access to certain system flash devices
through a firmwarwe interface. This change adds an mtd driver for these

mtd: powernv: Add powernv flash MTD abstraction driver

Powerpc powernv platforms allow access to certain system flash devices
through a firmwarwe interface. This change adds an mtd driver for these
flash devices.

Minor updates from Jeremy Kerr and Joel Stanley.

Signed-off-by: Cyril Bur <[email protected]>
Signed-off-by: Joel Stanley <[email protected]>
Signed-off-by: Jeremy Kerr <[email protected]>
Reviewed-by: Neelesh Gupta <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

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mtd: st_spi_fsm: only build for ARM

COMPILE_TEST allows us to build this driver on other arch'es. But not
all arch'es have the right I/O accessors -- particularly, x86 is missing
readsl() and writes

mtd: st_spi_fsm: only build for ARM

COMPILE_TEST allows us to build this driver on other arch'es. But not
all arch'es have the right I/O accessors -- particularly, x86 is missing
readsl() and writesl().

So just restrict this driver to ARCH_STI. It's still buildable for a
multiplatform ARM kernel, so it can get decent compile coverage.

Signed-off-by: Brian Norris <[email protected]>
Acked-by: Lee Jones <[email protected]>

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mtd: st_spi_fsm: fixup Kconfig dependency

I hear that this driver should depend on ARCH_STI, and that "SH" is not
actually a real symbol. At the same time, let's allow compile-testing on
other ARCH'

mtd: st_spi_fsm: fixup Kconfig dependency

I hear that this driver should depend on ARCH_STI, and that "SH" is not
actually a real symbol. At the same time, let's allow compile-testing on
other ARCH'es.

Signed-off-by: Brian Norris <[email protected]>
Acked-by: Lee Jones <[email protected]>
Reviewed-by: Marek Vasut <[email protected]>

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mtd: spi-nor: shorten Kconfig naming

Signed-off-by: Brian Norris <[email protected]>
Reviewed-by: Marek Vasut <[email protected]>
Acked-by: Huang Shijie <[email protected]>

mtd: m25p80: use the SPI nor framework

Use the new SPI nor framework, and rewrite the m25p80:
(0) remove all the NOR comands.
(1) change the m25p->command to an array.
(2) implement the necessary

mtd: m25p80: use the SPI nor framework

Use the new SPI nor framework, and rewrite the m25p80:
(0) remove all the NOR comands.
(1) change the m25p->command to an array.
(2) implement the necessary hooks, such as m25p80_read/m25p80_write.

Tested with the m25p32.
Signed-off-by: Huang Shijie <[email protected]>
Acked-by: Marek Vasut <[email protected]>
[Brian: rebased]
Signed-off-by: Brian Norris <[email protected]>

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mtd: st_spi_fsm: Allocate resources and register with MTD framework

This is a new driver. It's used to communicate with a special type of
optimised Serial Flash Controller called the FSM. The FSM us

mtd: st_spi_fsm: Allocate resources and register with MTD framework

This is a new driver. It's used to communicate with a special type of
optimised Serial Flash Controller called the FSM. The FSM uses a subset
of the SPI protocol to communicate with supported NOR-Flash devices.

Acked-by Angus Clark <[email protected]>
Signed-off-by: Lee Jones <[email protected]>
Signed-off-by: Brian Norris <[email protected]>

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mtd: m25p80: remove M25PXX_USE_FAST_READ Kconfig

Remove the compile-time option for FAST_READ, since we have run-time
support for detecting it. This refactors the logic for enabling
fast-read, such

mtd: m25p80: remove M25PXX_USE_FAST_READ Kconfig

Remove the compile-time option for FAST_READ, since we have run-time
support for detecting it. This refactors the logic for enabling
fast-read, such that for DT-enabled devices, we honor the
"m25p,fast-read" property but for non-DT devices, we default to using
FAST_READ whenever the flash device supports it.

Normal READ and FAST_READ differ only in the following:

* FAST_READ supports SPI higher clock frequencies [1]

* number of dummy cycles; FAST_READ requires 8 dummy cycles (whereas
READ requires 0) to allow the flash sufficient setup time, even when
running at higher clock speeds

Thus, for flash chips which support FAST_READ, there is otherwise no
limiting reason why we cannot use the FAST_READ opcode instead of READ.
It simply allows the SPI controller to run at higher clock rates. So
theoretically, nobody should be needing the compile-time option anyway.

[1] I have a Spansion S25FL128S datasheet which says:

"The maximum operating clock frequency for the READ command is 50
MHz."

And:

"The maximum operating clock frequency for FAST READ command is 133
MHz."

Signed-off-by: Brian Norris <[email protected]>

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mtd: diskonchip: remove unused entries in Kconfig

This patch proposes to remove kernel configuration parameters
defined in drivers/mtd/devices/Kconfig, but used nowhere
in the makefiles and source c

mtd: diskonchip: remove unused entries in Kconfig

This patch proposes to remove kernel configuration parameters
defined in drivers/mtd/devices/Kconfig, but used nowhere
in the makefiles and source code (except in comments).

Signed-off-by: Michael Opdenacker <[email protected]>
Acked-by: Kees Cook <[email protected]>
Acked-by: Robert Jarzmik <[email protected]>
Signed-off-by: Artem Bityutskiy <[email protected]>
Signed-off-by: David Woodhouse <[email protected]>

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mtd: merge mtdchar module with mtdcore

The MTD subsystem has historically tried to be as configurable as possible. The
side-effect of this is that its configuration menu is rather large, and we are

mtd: merge mtdchar module with mtdcore

The MTD subsystem has historically tried to be as configurable as possible. The
side-effect of this is that its configuration menu is rather large, and we are
gradually shrinking it. For example, we recently merged partitions support with
the mtdcore.

This patch does the next step - it merges the mtdchar module to mtdcore. And in
this case this is not only about eliminating too fine-grained separation and
simplifying the configuration menu. This is also about eliminating seemingly
useless kernel module.

Indeed, mtdchar is a module that allows user-space making use of MTD devices
via /dev/mtd* character devices. If users do not enable it, they simply cannot
use MTD devices at all. They cannot read or write the flash contents. Is it a
sane and useful setup? I believe not. And everyone just enables mtdchar.

Having mtdchar separate is also a little bit harmful. People sometimes miss the
fact that they need to enable an additional configuration option to have
user-space MTD interfaces, and then they wonder why on earth the kernel does
not allow using the flash? They spend time asking around.

Thus, let's just get rid of this module and make it part of mtd core.

Note, mtdchar had additional configuration option to enable OTP interfaces,
which are present on some flashes. I removed that option as well - it saves a
really tiny amount space.

[dwmw2: Strictly speaking, you can mount file systems on MTD devices just
fine without the mtdchar (or mtdblock) devices; you just can't do
other manipulations directly on the underlying device. But still I
agree that it makes sense to make this unconditional. And Yay! we
get to kill off an instance of checking CONFIG_foo_MODULE, which is
an abomination that should never happen.]

Signed-off-by: Artem Bityutskiy <[email protected]>
Signed-off-by: David Woodhouse <[email protected]>

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mtd: doc: remove support for DoC 2000/2001/2001+

These drivers are deprecated for very long time, and we have a different driver
for these called "diskonchip". Thus, kill the ancient cruft.

Signed-

mtd: doc: remove support for DoC 2000/2001/2001+

These drivers are deprecated for very long time, and we have a different driver
for these called "diskonchip". Thus, kill the ancient cruft.

Signed-off-by: Artem Bityutskiy <[email protected]>
Signed-off-by: David Woodhouse <[email protected]>

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mtd: docg3 fix missing bitreverse lib

Fix missing dependency which can cause a build error such
as: ERROR: "byte_rev_table" [drivers/mtd/devices/docg3.ko]
undefined!

Reported-by: Randy Dunlap <rdun

mtd: docg3 fix missing bitreverse lib

Fix missing dependency which can cause a build error such
as: ERROR: "byte_rev_table" [drivers/mtd/devices/docg3.ko]
undefined!

Reported-by: Randy Dunlap <[email protected]>
Acked-by: Randy Dunlap <[email protected]>
Signed-off-by: Robert Jarzmik <[email protected]>
Signed-off-by: David Woodhouse <[email protected]>

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