Commit Graph

593 Commits

Author SHA1 Message Date
Linus Torvalds e4bc13adfd Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block
Pull cgroup writeback support from Jens Axboe:
 "This is the big pull request for adding cgroup writeback support.

  This code has been in development for a long time, and it has been
  simmering in for-next for a good chunk of this cycle too.  This is one
  of those problems that has been talked about for at least half a
  decade, finally there's a solution and code to go with it.

  Also see last weeks writeup on LWN:

        http://lwn.net/Articles/648292/"

* 'for-4.2/writeback' of git://git.kernel.dk/linux-block: (85 commits)
  writeback, blkio: add documentation for cgroup writeback support
  vfs, writeback: replace FS_CGROUP_WRITEBACK with SB_I_CGROUPWB
  writeback: do foreign inode detection iff cgroup writeback is enabled
  v9fs: fix error handling in v9fs_session_init()
  bdi: fix wrong error return value in cgwb_create()
  buffer: remove unusued 'ret' variable
  writeback: disassociate inodes from dying bdi_writebacks
  writeback: implement foreign cgroup inode bdi_writeback switching
  writeback: add lockdep annotation to inode_to_wb()
  writeback: use unlocked_inode_to_wb transaction in inode_congested()
  writeback: implement unlocked_inode_to_wb transaction and use it for stat updates
  writeback: implement [locked_]inode_to_wb_and_lock_list()
  writeback: implement foreign cgroup inode detection
  writeback: make writeback_control track the inode being written back
  writeback: relocate wb[_try]_get(), wb_put(), inode_{attach|detach}_wb()
  mm: vmscan: disable memcg direct reclaim stalling if cgroup writeback support is in use
  writeback: implement memcg writeback domain based throttling
  writeback: reset wb_domain->dirty_limit[_tstmp] when memcg domain size changes
  writeback: implement memcg wb_domain
  writeback: update wb_over_bg_thresh() to use wb_domain aware operations
  ...
2015-06-25 16:00:17 -07:00
Linus Torvalds 08d183e3c1 powerpc updates for 4.2
- Disable the 32-bit vdso when building LE, so we can build with a 64-bit only
    toolchain.
  - EEH fixes from Gavin & Richard.
  - Enable the sys_kcmp syscall from Laurent.
  - Sysfs control for fastsleep workaround from Shreyas.
  - Expose OPAL events as an irq chip by Alistair.
  - MSI ops moved to pci_controller_ops by Daniel.
  - Fix for kernel to userspace backtraces for perf from Anton.
  - Merge pseries and pseries_le defconfigs from Cyril.
  - CXL in-kernel API from Mikey.
  - OPAL prd driver from Jeremy.
  - Fix for DSCR handling & tests from Anshuman.
  - Powernv flash mtd driver from Cyril.
  - Dynamic DMA Window support on powernv from Alexey.
  - LLVM clang fixes & workarounds from Anton.
  - Reworked version of the patch to abort syscalls when transactional.
  - Fix the swap encoding to support 4TB, from Aneesh.
  - Various fixes as usual.
  - Freescale updates from Scott: Highlights include more 8xx optimizations, an
    e6500 hugetlb optimization, QMan device tree nodes, t1024/t1023 support, and
    various fixes and cleanup.
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Merge tag 'powerpc-4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux

Pull powerpc updates from Michael Ellerman:

 - disable the 32-bit vdso when building LE, so we can build with a
   64-bit only toolchain.

 - EEH fixes from Gavin & Richard.

 - enable the sys_kcmp syscall from Laurent.

 - sysfs control for fastsleep workaround from Shreyas.

 - expose OPAL events as an irq chip by Alistair.

 - MSI ops moved to pci_controller_ops by Daniel.

 - fix for kernel to userspace backtraces for perf from Anton.

 - merge pseries and pseries_le defconfigs from Cyril.

 - CXL in-kernel API from Mikey.

 - OPAL prd driver from Jeremy.

 - fix for DSCR handling & tests from Anshuman.

 - Powernv flash mtd driver from Cyril.

 - dynamic DMA Window support on powernv from Alexey.

 - LLVM clang fixes & workarounds from Anton.

 - reworked version of the patch to abort syscalls when transactional.

 - fix the swap encoding to support 4TB, from Aneesh.

 - various fixes as usual.

 - Freescale updates from Scott: Highlights include more 8xx
   optimizations, an e6500 hugetlb optimization, QMan device tree nodes,
   t1024/t1023 support, and various fixes and cleanup.

* tag 'powerpc-4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (180 commits)
  cxl: Fix typo in debug print
  cxl: Add CXL_KERNEL_API config option
  powerpc/powernv: Fix wrong IOMMU table in pnv_ioda_setup_bus_dma()
  powerpc/mm: Change the swap encoding in pte.
  powerpc/mm: PTE_RPN_MAX is not used, remove the same
  powerpc/tm: Abort syscalls in active transactions
  powerpc/iommu/ioda2: Enable compile with IOV=on and IOMMU_API=off
  powerpc/include: Add opal-prd to installed uapi headers
  powerpc/powernv: fix construction of opal PRD messages
  powerpc/powernv: Increase opal-irqchip initcall priority
  powerpc: Make doorbell check preemption safe
  powerpc/powernv: pnv_init_idle_states() should only run on powernv
  macintosh/nvram: Remove as unused
  powerpc: Don't use gcc specific options on clang
  powerpc: Don't use -mno-strict-align on clang
  powerpc: Only use -mtraceback=no, -mno-string and -msoft-float if toolchain supports it
  powerpc: Only use -mabi=altivec if toolchain supports it
  powerpc: Fix duplicate const clang warning in user access code
  vfio: powerpc/spapr: Support Dynamic DMA windows
  vfio: powerpc/spapr: Register memory and define IOMMU v2
  ...
2015-06-24 08:46:32 -07:00
Richard Weinberger 0eb8618bd0 mtd: docg3: Fix kasprintf() usage
kasprintf() does a dynamic memory allocation and can fail.
We have to handle that case.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-06-16 18:58:47 -07:00
Richard Weinberger 45c2ebd702 mtd: docg3: Don't leak docg3->bbt in error path
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-06-16 18:58:47 -07:00
Cyril Bur 1cbb4a1c43 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 <cyrilbur@gmail.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Reviewed-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-06-11 13:23:30 +10:00
Tejun Heo 66114cad64 writeback: separate out include/linux/backing-dev-defs.h
With the planned cgroup writeback support, backing-dev related
declarations will be more widely used across block and cgroup;
unfortunately, including backing-dev.h from include/linux/blkdev.h
makes cyclic include dependency quite likely.

This patch separates out backing-dev-defs.h which only has the
essential definitions and updates blkdev.h to include it.  c files
which need access to more backing-dev details now include
backing-dev.h directly.  This takes backing-dev.h off the common
include dependency chain making it a lot easier to use it across block
and cgroup.

v2: fs/fat build failure fixed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jens Axboe <axboe@fb.com>
2015-06-02 08:33:34 -06:00
Brian Norris b74bdbe588 mtd: remove incorrect file name
This is an example of why it doesn't make much sense to put this
information here in the first place. I don't really know what purpose it
serves.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-22 10:57:46 -07:00
Brian Norris 2ddd8db90a Linux 4.1-rc4
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Merge tag 'v4.1-rc4' into MTD's -next
2015-05-18 10:50:43 -07:00
Brian Norris 8947e396a8 Documentation: dt: mtd: replace "nor-jedec" binding with "jedec, spi-nor"
In commit 8ff16cf77c ("Documentation: devicetree: m25p80: add "nor-jedec"
binding"), we added a generic "nor-jedec" binding to catch all
mostly-compatible SPI NOR flash which can be detected via the READ ID
opcode (0x9F). This was discussed and reviewed at the time, however
objections have come up since then as part of this discussion:

  http://lkml.kernel.org/g/20150511224646.GJ32500@ld-irv-0074

It seems the parties involved agree that "jedec,spi-nor" does a better
job of capturing the fact that this is SPI-specific, not just any NOR
flash.

This binding was only merged for v4.1-rc1, so it's still OK to change
the naming.

At the same time, let's move the documentation to a better name.

Next up: stop referring to code (drivers/mtd/devices/m25p80.c) from the
documentation.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Mark Rutland <mark.rutland@arm.com>
2015-05-15 13:04:00 -07:00
Rafał Miłecki 3094fe121e mtd: m25p80: remove unused flash entries from id_table
We had many entries that were recently added just to allow selecting
some flashes directly but were never used. They weren't providing any
special flash handling, we just needed them due to the lack of some
generic binding string.

With the introduction of "nor-jedec" (in 1103b85) they won't be needed
unless we discover some faulty flash requiring workarounds.
As explained in m25p80 DT documentation we require specifying
"nor-jedec" now as less specific compatible entry.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07 00:18:24 -07:00
Fabian Frederick 6661044365 mtd: constify of_device_id array
of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06 23:44:07 -07:00
Brian Norris 1103b85170 mtd: m25p80: bind to "nor-jedec" ID, for auto-detection
Use the new 'nor-jedec' binding to provide automatic detection of flash
that use the 0x9F READ ID opcode. This can help for use cases where
platforms just specify compatibility with "m25p80", and then see
messages like this:

  m25p80 spi32766.0: found s25fl256s1, expected m25p80

Instead, they can just specify the generic string and see this:

  m25p80 spi32766.0: s25fl256s1 (32768 Kbytes)

Also, update the language about m25p_ids[] to straighten out the
expectations here. We should no longer need to continuously grow the
m25p_ids[] table, and in fact, we might want to start removing entries
which are not used in device trees so far, so we can just default to
auto-detection as much as possible in the future.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Rafał Miłecki <zajec5@gmail.com>
2015-04-05 18:56:21 -07:00
Brian Norris 45fd357a49 mtd: docg3: remove invalid __exit annotations
The .remove callback may be used when detaching a device via sysfs, so
we can't expect to free up this memory.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
2015-04-05 18:06:44 -07:00
Brian Norris dc52499e7f mtd: docg3: drop dead code
If no devices were found, we would already have skipped over this code.

Detected by Coverity, CID #744270

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
2015-03-11 15:21:19 -07:00
Felix Fietkau d6a3f0176f mtd: block2mtd: wait until block devices are presented
Ensures that block2mtd is triggered after the block devices are enumerated
at boot time.
This issue is seen on BCM2835 (Raspberry Pi) systems when mounting JFFS2
block2mtd filesystems, probably because of the delay on enumerating a USB
MMC card reader.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rodrigo Freire <rfreire@redhat.com>
Signed-off-by: Herton Krzesinski <herton@redhat.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-02-23 23:44:12 -08:00
Lee Jones a9b679bfd2 mtd: st_spi_fsm: Fix [-Wsign-compare] build warning
drivers/mtd/devices/st_spi_fsm.c:1647:17:
  warning: comparison between signed and unsigned integer expressions

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-01-12 21:08:10 -08:00
Lee Jones 69d5af8d01 mtd: st_spi_fsm: Obtain and use EMI clock
ST's Common Clk Framework is now available. This patch ensures the FSM
makes use of it by obtaining and enabling the EMI clock. If system fails
to provide the EMI clock, we bomb out.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-01-12 21:08:04 -08:00
Lee Jones 5ecd3ea188 mtd: st_spi_fsm: Extend fsm_clear_fifo to handle unwanted bytes
Under certain conditions, the SPI-FSM Controller can be left in a state where
the data FIFO is not entirely empty.  This can lead to problems where subsequent
data transfers appear to have been shifted by a number of unidentified bytes.

One simple example would be an errant FSM sequence which loaded more data to the
FIFO than was read by the host.  Another more interesting case results from an
obscure artefact in the FSM Controller.  When switching from data transfers in
x4 or x2 mode to data transfers in x1 mode, extraneous bytes will appear in the
FIFO, unless the previous data transfer was a multiple of 32 cycles (i.e. 8
bytes for x2, and 16 bytes for x4).  This applies equally whether FSM is being
operated directly by a S/W driver, or by the SPI boot-controller in FSM-Boot
mode.  Furthermore, data in the FIFO not only survive a transition between
FSM-Boot and FSM, but also a S/W reset of IP block [1].

By taking certain precautions, it is possible to prevent the driver from causing
this type of problem (e.g. ensuring that the host and programmed sequence
agree on the transfer size, and restricting transfer sizes to multiples of
32-cycles [2]).  However, at the point the driver is loaded, no assumptions can be
made regarding the state of the FIFO.  Even if previous S/W drivers have behaved
correctly, it is impossible to control the number of transactions serviced by
the controller operating in FSM-Boot.

To address this problem, we ensure the FIFO is cleared during initialisation,
before performing any FSM operations.  Previously, the fsm_clear_fifo() code was
capable of detecting and clearing any unwanted 32-bit words from the FIFO.  This
patch extends the capability to handle an arbitrary number of bytes present in
the FIFO [3].  Now that the issue is better understood, we also remove the calls
to fsm_clear_fifo() following the fsm_read() and fsm_write() operations.

The process of actually clearing the FIFO deserves a mention.  While the FIFO
may contain any number of bytes, the SPI_FAST_SEQ_STA register only reports the
number of complete 32-bit words present.  Furthermore, data can only be drained
from the FIFO by reading complete 32-bit words.  With this in mind, a two stage
process is used to the clear the FIFO:

    1. Read any complete 32-bit words from the FIFO, as reported by the
           SPI_FAST_SEQ_STA register.

    2. Mop up any remaining bytes.  At this point, it is not known if there
           are 0, 1, 2, or 3 bytes in the FIFO.  To handle all cases, a dummy
           FSM sequence is used to load one byte at a time, until a complete
           32-bit word is formed; at most, 4 bytes will need to be loaded.

[1] Although this issue has existed since early versions of the SPI-FSM
    controller, its full extent only emerged recently as a consequence of the
    targetpacks starting to use FSM-Boot(x4) as the default configuration.

[2] The requirement to restrict transfers to multiples of 32 cycles was found
    empirically back when DUAL and QUAD mode support was added.  The current
    analysis now gives a satisfactory explanation for this requirement.

[3] Theoretically, it is possible for the FIFO to contain an arbitrary number of
    bits.  However, since there are no known use-cases that leave incomplete
    bytes in the FIFO, only words and bytes are considered here.

Signed-off-by: Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-01-12 21:08:00 -08:00
Linus Torvalds d6666be6f0 MTD updates for 3.19:
* Add device tree support for DoC3
 
  * SPI NOR:
 
     Refactoring, for better layering between spi-nor.c and its driver users
     (e.g., m25p80.c)
 
     New flash device support
 
     Support 6-byte ID strings
 
  * NAND
 
     New NAND driver for Allwinner SoC's (sunxi)
 
     GPMI NAND: add support for raw (no ECC) access, for testing purposes
 
     Add ATO manufacturer ID
 
     A few odd driver fixes
 
  * MTD tests:
 
     Allow testers to compensate for OOB bitflips in oobtest
 
     Fix a torturetest regression
 
  * nandsim: Support longer ID byte strings
 
 And more.
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Merge tag 'for-linus-20141215' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "Summary:
   - Add device tree support for DoC3

   - SPI NOR:
        Refactoring, for better layering between spi-nor.c and its
        driver users (e.g., m25p80.c)

        New flash device support

        Support 6-byte ID strings

   - NAND:
        New NAND driver for Allwinner SoC's (sunxi)

        GPMI NAND: add support for raw (no ECC) access, for testing
        purposes

        Add ATO manufacturer ID

        A few odd driver fixes

   - MTD tests:
        Allow testers to compensate for OOB bitflips in oobtest

        Fix a torturetest regression

   - nandsim: Support longer ID byte strings

  And more"

* tag 'for-linus-20141215' of git://git.infradead.org/linux-mtd: (63 commits)
  mtd: tests: abort torturetest on erase errors
  mtd: physmap_of: fix potential NULL dereference
  mtd: spi-nor: allow NULL as chip name and try to auto detect it
  mtd: nand: gpmi: add raw oob access functions
  mtd: nand: gpmi: add proper raw access support
  mtd: nand: gpmi: add gpmi_copy_bits function
  mtd: spi-nor: factor out write_enable() for erase commands
  mtd: spi-nor: add support for s25fl128s
  mtd: spi-nor: remove the jedec_id/ext_id
  mtd: spi-nor: add id/id_len for flash_info{}
  mtd: nand: correct the comment of function nand_block_isreserved()
  jffs2: Drop bogus if in comment
  mtd: atmel_nand: replace memcpy32_toio/memcpy32_fromio with memcpy
  mtd: cafe_nand: drop duplicate .write_page implementation
  mtd: m25p80: Add support for serial flash Spansion S25FL132K
  MTD: m25p80: fix inconsistency in m25p_ids compared to spi_nor_ids
  mtd: spi-nor: improve wait-till-ready timeout loop
  mtd: delete unnecessary checks before two function calls
  mtd: nand: omap: Fix NAND enumeration on 3430 LDP
  mtd: nand: add ATO manufacturer info
  ...
2014-12-17 09:59:26 -08:00
Brian Norris 05241aead9 mtd: spi-nor: factor out write_enable() for erase commands
write_enable() was being duplicated to both m25p80.c and fsl-quadspi.c.
But this should be handled within the spi-nor abstraction layer.

At the same time, let's add write_disable() after erasing, so we don't
leave the flash in a write-enabled state afterward.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Huang Shijie <shijie.huang@intel.com>
2014-12-01 00:19:03 -08:00
Knut Wohlrab 3e38933dd8 mtd: m25p80: Add support for serial flash Spansion S25FL132K
Signed-off-by: Knut Wohlrab <knut.wohlrab@de.bosch.com>
Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-11-25 23:11:24 -08:00
Alison Chaiken 834b686552 MTD: m25p80: fix inconsistency in m25p_ids compared to spi_nor_ids
As stated in a5b7616c5, "mtd: m25p80,spi-nor: Fix module aliases for
m25p80", m25p_ids[] in m25p80.c needs to be kept in sync with
spi_nor_ids[] in spi-nor.c. The change here corrects a misalignment.

(We were missing m25px80 and we had a duplicate w25q128.)

Signed-off-by: Alison Chaiken <alison_chaiken@mentor.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: <stable@vger.kernel.org> # 3.18+
2014-11-25 23:09:29 -08:00
Markus Elfring 05a221bb1f mtd: delete unnecessary checks before two function calls
The functions kfree() and pci_dev_put() test whether their argument is NULL
and then return immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-11-25 22:44:10 -08:00
Mark Brown 7a95db0304 mtd: dataflash: Remove use of tx_dma
We are trying to remove the legacy tx_dma and rx_dma fields from the
spi_transfer structure. Currently dataflash uses tx_dma but only to make
sure that it's set to 0 so we can remove this use by replacing with a
zero initialisation of the entire spi_transfer struct.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-11-05 12:57:24 -08:00
Brian Norris 6af91949ab mtd: m25p80: drop wait-till-ready checks
spi-nor.c should be taking care of these now.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2014-11-05 02:08:20 -08:00
Huang Shijie 0b78a2cf2a mtd: spi-nor: fix the wrong dummy value
For the DDR Quad read, the dummy cycles maybe 3 or 6 which is less then 8.
The dummy cycles is actually 8 for SPI fast/dual/quad read.

This patch makes preparations for the DDR quad read, it fixes the wrong dummy
value for both the spi-nor.c and m25p80.c.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-11-05 00:26:06 -08:00
Greg Kroah-Hartman a8a93c6f99 Merge branch 'platform/remove_owner' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into driver-core-next
Remove all .owner fields from platform drivers
2014-11-03 19:53:56 -08:00
Brian Norris d4efafcc04 mtd: docg3: fix 'defined but not used' warning
With CONFIG_OF=n, we can see the following warning:

   drivers/mtd/devices/docg3.c:2122:28: warning: 'docg3_dt_ids' defined but not used [-Wunused-variable]
    static struct of_device_id docg3_dt_ids[] = {

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
2014-10-22 10:33:36 -07:00
Rob Ward b85b8d92c1 mtd: phram: fix asm/io.h include usage
Modify phram to include <linux/io.h> rather than <asm/io.h>

Signed-off-by: Rob Ward <robert.ward114@googlemail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-10-22 01:59:30 -07:00
Robert Jarzmik a59459f29f mtd: docg3: add device-tree support
Add device-tree support. This is straightforward as docg3 only uses the
standard IOMEM resources.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: devicetree@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-10-22 01:35:40 -07:00
Joe Perches 8c98d2554f docg3: Fix miuse of seq_printf return value
seq_printf doesn't return a useful value, so remove
these misuses.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-10-21 22:28:57 -07:00
Ben Hutchings a5b7616c55 mtd: m25p80,spi-nor: Fix module aliases for m25p80
m25p80's device ID table is now spi_nor_ids, defined in spi-nor.  The
MODULE_DEVICE_TABLE() macro doesn't work with extern definitions, but
its use was also removed at the same time.  Now if m25p80 is built as
a module it doesn't get the necessary aliases to be loaded
automatically.

A clean solution to this will involve defining the list of device
IDs in spi-nor.h and removing struct spi_device_id from the spi-nor
API, but this is quite a large change.

As a quick fix suitable for stable, copy the device IDs back into
m25p80.

Fixes: 03e296f613 ("mtd: m25p80: use the SPI nor framework")
Cc: <stable@vger.kernel.org> # 3.16.x: 32f1b7c8352f: mtd: move support for struct flash_platform_data into m25p80
Cc: <stable@vger.kernel.org> # 3.16.x: 90e55b3812a1: mtd: m25p80: get rid of spi_get_device_id
Cc: <stable@vger.kernel.org> # 3.16.x: 70f3ce0510af: mtd: spi-nor: make spi_nor_scan() take a chip type name, not spi_device_id
Cc: <stable@vger.kernel.org> # 3.16.x
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-10-21 13:46:03 -07:00
Wolfram Sang c37c1e1605 mtd: devices: drop owner assignment from platform_drivers
A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-20 16:20:57 +02:00
Ben Hutchings 70f3ce0510 mtd: spi-nor: make spi_nor_scan() take a chip type name, not spi_device_id
Drivers currently call spi_nor_match_id() and then spi_nor_scan().
This adds a dependency on struct spi_device_id which we want to
avoid.  Make spi_nor_scan() do it for them.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-10-17 09:29:21 -07:00
Rafał Miłecki 90e55b3812 mtd: m25p80: get rid of spi_get_device_id
This simplifies the way we use spi_nor framework and will allow us to
drop spi_nor_match_id.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-10-17 09:29:21 -07:00
Rafał Miłecki 32f1b7c835 mtd: move support for struct flash_platform_data into m25p80
This "type" seems to be an extra hint for m25p80 about the flash. Some
archs register flash_platform_data with "name" set to "m25p80" and then
with a real flash name set in "type". It seems to be a trick specific
to the m25p80 so let's move it out of spi-nor.
Btw switch to the spi_nor_match_id instead of iterating spi_nor_ids.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-09-28 15:27:03 -07:00
Ezequiel García 6d178ef2fd mtd: nand: Move ELM driver and rename as omap_elm
The ELM driver is only used by the OMAP NAND driver, so let's move it
to the nand/ directory. Additionally, let's rename it to a less confusing
name, so the module is built with a meaningful name, instead of the previous
'elm.ko'.

Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-09-22 11:39:26 -07:00
Samarth Parikh 6f3c0f1631 mtd: Fixed checkpatch seq_printf warnings
Fixed checkpatch warnings: "WARNING: Prefer seq_puts to seq_printf"

This patch is created with reference to the ongoing lkml thread
https://lkml.org/lkml/2014/7/15/646
where Andrew Morton wrote:

"
- puts is presumably faster

- puts doesn't go rogue if you accidentally pass it a "%".

- this patch would actually make compiled object files few bytes smaller.
  Perhaps because seq_printf() is a varargs function, forcing the
  caller to pass args on the stack instead of in registers.
"

Signed-off-by: Samarth Parikh <samarthp@ymail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-08-19 11:53:07 -07:00
Brian Norris d0d5864676 Linux 3.16-rc6
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Merge tag 'v3.16-rc6' into MTD development branch

Linux 3.16-rc6
2014-07-21 00:01:16 -07:00
Rob Ward c95777a4bb mtd: phram: Fix whitespace issues
Fix various whitespace issues.

No functional changes.

Signed-off-by: Rob Ward <robert.ward114@googlemail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-14 10:20:19 -07:00
Ted Juan 6938ad40cb mtd: devices: elm: fix elm_context_save() and elm_context_restore() functions
These two function's switch case lack the 'break' that make them always
return error.

Signed-off-by: Ted Juan <ted.juan@gmail.com>
Acked-by: Pekon Gupta <pekon@ti.com>
Cc: <stable@vger.kernel.org> # 3.12.x+
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-05 15:44:42 -07:00
Fabian Frederick 89384f6462 mtd: phram: replace kmalloc/strcpy by kstrdup
Cc: Joern Engel <joern@lazybastard.org>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-07-05 15:40:38 -07:00
Linus Torvalds 4251c2a670 Most of this is cleaning up various driver sysfs permissions so we can
re-add the perm check (we unified the module param and sysfs checks, but
 the module ones were stronger so we weakened them temporarily).
 
 Param parsing gets documented, and also "--" now forces args to be
 handed to init (and ignored by the kernel).
 
 Module NX/RO protections get tightened: we now set them before calling
 parse_args().
 
 Cheers,
 Rusty.
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Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull module updates from Rusty Russell:
 "Most of this is cleaning up various driver sysfs permissions so we can
  re-add the perm check (we unified the module param and sysfs checks,
  but the module ones were stronger so we weakened them temporarily).

  Param parsing gets documented, and also "--" now forces args to be
  handed to init (and ignored by the kernel).

  Module NX/RO protections get tightened: we now set them before calling
  parse_args()"

* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  module: set nx before marking module MODULE_STATE_COMING.
  samples/kobject/: avoid world-writable sysfs files.
  drivers/hid/hid-picolcd_fb: avoid world-writable sysfs files.
  drivers/staging/speakup/: avoid world-writable sysfs files.
  drivers/regulator/virtual: avoid world-writable sysfs files.
  drivers/scsi/pm8001/pm8001_ctl.c: avoid world-writable sysfs files.
  drivers/hid/hid-lg4ff.c: avoid world-writable sysfs files.
  drivers/video/fbdev/sm501fb.c: avoid world-writable sysfs files.
  drivers/mtd/devices/docg3.c: avoid world-writable sysfs files.
  speakup: fix incorrect perms on speakup_acntsa.c
  cpumask.h: silence warning with -Wsign-compare
  Documentation: Update kernel-parameters.tx
  param: hand arguments after -- straight to init
  modpost: Fix resource leak in read_dump()
2014-06-11 16:09:14 -07:00
Linus Torvalds e413a19a8e MTD updates for 3.16:
- refactor m25p80.c driver for use as a general SPI NOR framework for other
   drivers which may speak to SPI NOR flash without providing full SPI support
   (i.e., not part of drivers/spi/)
 - new Freescale QuadSPI driver (utilizing new SPI NOR framework)
 - updates for the STMicro "FSM" SPI NOR driver
 - fix sync/flush behavior on mtd_blkdevs
 - fixup subpage write support on a few NAND drivers
 - correct the MTD OOB test for odd-sized OOB areas
 - add BCH-16 support for OMAP NAND
 - fix warnings and trivial refactoring
 - utilize new ECC DT bindings in pxa3xx NAND driver
 - new LPDDR NVM driver
 - address a few assorted bugs caught by Coverity
 - add new imx6sx support for GPMI NAND
 - use a bounce buffer for NAND when non-DMA-able buffers are used
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Merge tag 'for-linus-20140610' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 - refactor m25p80.c driver for use as a general SPI NOR framework for
   other drivers which may speak to SPI NOR flash without providing full
   SPI support (i.e., not part of drivers/spi/)
 - new Freescale QuadSPI driver (utilizing new SPI NOR framework)
 - updates for the STMicro "FSM" SPI NOR driver
 - fix sync/flush behavior on mtd_blkdevs
 - fixup subpage write support on a few NAND drivers
 - correct the MTD OOB test for odd-sized OOB areas
 - add BCH-16 support for OMAP NAND
 - fix warnings and trivial refactoring
 - utilize new ECC DT bindings in pxa3xx NAND driver
 - new LPDDR NVM driver
 - address a few assorted bugs caught by Coverity
 - add new imx6sx support for GPMI NAND
 - use a bounce buffer for NAND when non-DMA-able buffers are used

* tag 'for-linus-20140610' of git://git.infradead.org/linux-mtd: (77 commits)
  mtd: gpmi: add gpmi support for imx6sx
  mtd: maps: remove check for CONFIG_MTD_SUPERH_RESERVE
  mtd: bf5xx_nand: use the managed version of kzalloc
  mtd: pxa3xx_nand: make the driver work on big-endian systems
  mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error
  mtd: nand: r852: correct write_buf loop bounds
  mtd: nand_bbt: handle error case for nand_create_badblock_pattern()
  mtd: nand_bbt: remove unused variable
  mtd: maps: sc520cdp: fix warnings
  mtd: slram: fix unused variable warning
  mtd: pfow: remove unused variable
  mtd: lpddr: fix Kconfig dependency, for I/O accessors
  mtd: nand: pxa3xx: Add supported ECC strength and step size to the DT binding
  mtd: nand: pxa3xx: Use ECC strength and step size devicetree binding
  mtd: nand: pxa3xx: Clean pxa_ecc_init() error handling
  mtd: nand: Warn the user if the selected ECC strength is too weak
  mtd: nand: omap: Documentation: How to select correct ECC scheme for your device ?
  mtd: nand: omap: add support for BCH16_ECC - NAND driver updates
  mtd: nand: omap: add support for BCH16_ECC - ELM driver updates
  mtd: nand: omap: add support for BCH16_ECC - GPMC driver updates
  ...
2014-06-11 08:35:34 -07:00
Brian Norris ed491d2063 mtd: slram: fix unused variable warning
drivers/mtd/devices/slram.c: In function 'init_slram':
  drivers/mtd/devices/slram.c:283:6: warning: variable 'i' set but not used [-Wunused-but-set-variable]

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28 00:05:24 -07:00
pekon gupta 2be589e4b2 mtd: nand: omap: add support for BCH16_ECC - ELM driver updates
ELM hardware engine is used to detect ECC errors for BCHx ecc-schemes
(like BCH4/BCH8/BCH16). This patch extends configuration of ELM registers
for adding support of BCH16_HW ecc-scheme.

Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20 17:52:14 -07:00
Jingoo Han aeea6eb4c0 mtd: st_spi_fsm: Make of_device_id array const
Make of_device_id array const, because all OF functions
handle it as const.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20 16:35:29 -07:00
Rusty Russell 993bcc62ce drivers/mtd/devices/docg3.c: avoid world-writable sysfs files.
In line with practice for module parameters, we're adding a build-time
check that sysfs files aren't world-writable.

Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-05-14 10:53:53 +09:30
Geert Uytterhoeven 8848e161b7 mtd: m25p80: Revive dual read support
Commit 03e296f613 ("mtd: m25p80: use the SPI
nor framework") accidentally removed support for Dual SPI read transfers.
Add it back.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-12 13:16:26 -07:00
Wolfram Sang 8d808959e4 mtd: elm: compile suspend/resume only with PM_SLEEP
Fixes:
drivers/mtd/devices/elm.c:480:12: warning: 'elm_suspend' defined but not used [-Wunused-function]
drivers/mtd/devices/elm.c:488:12: warning: 'elm_resume' defined but not used [-Wunused-function]

Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Acked-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-12 13:16:25 -07:00