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2015-05-15mtd: nand: add NAND driver "library" for Broadcom STB NAND controllerBrian Norris
This core originated in Set-Top Box chips (BCM7xxx) but is used in a variety of other Broadcom chips, including some BCM63xxx, BCM33xx, and iProc/Cygnus. It's been used only on ARM and MIPS SoCs, so restrict it to those architectures. There are multiple revisions of this core throughout the years, and almost every version broke register compatibility in some small way, but with some effort, this driver is able to support v4.0, v5.0, v6.x, v7.0, and v7.1. It's been tested on v5.0, v6.0, v6.1, v7.0, and v7.1 recently, so there hopefully are no more lurking inconsistencies. This patch adds just some library support, on which platform drivers can be built. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Tested-by: Florian Fainelli <f.fainelli@gmail.com>
2015-05-15Documentation: dt: mtd: replace "nor-jedec" binding with "jedec, spi-nor"Brian Norris
In commit 8ff16cf77ce3 ("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>
2015-05-14mtd: readtest: don't clobber error reportsBrian Norris
Commit 2a6a28e7922c ("mtd: Make MTD tests cancelable") accidentally clobbered any read failure reports. Coverity CID #1296020 Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-12mtd: fix: avoid race condition when accessing mtd->usecountBrian Norris
On A MIPS 32-cores machine a BUG_ON was triggered because some acesses to mtd->usecount were done without taking mtd_table_mutex. kernel: Call Trace: kernel: [<ffffffff80401818>] __put_mtd_device+0x20/0x50 kernel: [<ffffffff804086f4>] blktrans_release+0x8c/0xd8 kernel: [<ffffffff802577e0>] __blkdev_put+0x1a8/0x200 kernel: [<ffffffff802579a4>] blkdev_close+0x1c/0x30 kernel: [<ffffffff8022006c>] __fput+0xac/0x250 kernel: [<ffffffff80171208>] task_work_run+0xd8/0x120 kernel: [<ffffffff8012c23c>] work_notifysig+0x10/0x18 kernel: kernel: Code: 2442ffff ac8202d8 000217fe <00020336> dc820128 10400003 00000000 0040f809 00000000 kernel: ---[ end trace 080fbb4579b47a73 ]--- Fixed by taking the mutex in blktrans_open and blktrans_release. Note that this locking is already suggested in include/linux/mtd/blktrans.h: struct mtd_blktrans_ops { ... /* Called with mtd_table_mutex held; no race with add/remove */ int (*open)(struct mtd_blktrans_dev *dev); void (*release)(struct mtd_blktrans_dev *dev); ... }; But we weren't following it. Originally reported by (and patched by) Zhang and Giuseppe, independently. Improved and rewritten. Cc: stable@vger.kernel.org Reported-by: Zhang Xingcai <zhangxingcai@huawei.com> Reported-by: Giuseppe Cantavenera <giuseppe.cantavenera.ext@nokia.com> Tested-by: Giuseppe Cantavenera <giuseppe.cantavenera.ext@nokia.com> Acked-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-11mtd: nand: add common DT init codeBrian Norris
These are already-documented common bindings for NAND chips. Let's handle them in nand_base. If NAND controller drivers need to act on this data before bringing up the NAND chip (e.g., fill out ECC callback functions, change HW modes, etc.), then they can do so between calling nand_scan_ident() and nand_scan_tail(). Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07mtd: m25p80: remove unused flash entries from id_tableRafał Miłecki
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>
2015-05-07mtd: spi-nor: add support for the ISSI SI25CD512 SPI flashGabor Juhos
Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07mtd: spi-nor: add support for the Macronix MX25L512E SPI flash chipGabor Juhos
Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07mtd: Switch to PM opsLars-Peter Clausen
Use dev_pm_ops instead of the legacy suspend/resume callbacks for the MTD class suspend and resume operations. While we are at it slightly reorder things to avoid the need for forward declarations. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07mtd: samsung: Constify platform_device_idKrzysztof Kozlowski
The platform_device_id is not modified by the driver and core uses it as const. Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07mtd: s3c2410: Constify platform_device_idKrzysztof Kozlowski
The platform_device_id is not modified by the driver and core uses it as const. Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07mtd: mxc-nand: Constify platform_device_idKrzysztof Kozlowski
The platform_device_id is not modified by the driver and core uses it as const. Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07mtd: nand: pxa3xx: fix build on ARM64Rob Herring
In preparation to enable ARCH_MMP on ARM64, a couple of fixes are needed to build the pxa3xx_nand driver: Legacy DMA will only used on ARM, so also make it condtional on CONFIG_ARM. __raw_{read,write}sl are not available on ARM64 or generically, so use the readsl/writesl variants instead. Somewhat inconsistently, {read,write}sl are inherently non-swapping with the generic version using __raw_{read,write}l. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: linux-mtd@lists.infradead.org [Brian: added one more __raw_readsl -> readsl] Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-07mtd: nand: pxa3xx: Switch FIFO draining to jiffies-based timeoutMaxime Ripard
Now that the driver handles the FIFO draining in a threaded interrupt, we can base our timeout on jiffies and sleeping, instead of using mdelay. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06mtd: fsmc_nand: match wait_for_completion_timeout return typeNicholas Mc Guire
return type of wait_for_completion_timeout is unsigned long not int. An appropriately named unsigned long is added and the assignment fixed up. This not only should help readability but also handles corner cases properly. Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06mtd: fsmc_nand: fix handling of wait_for_completion_timeout return valueNicholas Mc Guire
wait_for_completion_timeout does not return negative values so result handling here does not need to check for negative return. Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06mtd: nand: Remove in vain memset() in nand_onfi_get_features()Richard Weinberger
As all four bytes are written in any case the memset() is in vain. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06mtd: constify of_device_id arrayFabian Frederick
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>
2015-05-06mtd: nand_bbt: fix theoretical integer overflow in BBT writeBrian Norris
This statement was written with a cast-to-loff_t to be sure to have a full 64-bit mask. However, we don't account for the fact that '1 << this->bbt_erase_shift' might already overflow. This will not be a problem in practice, since eraseblocks should never be anywhere near 4GiB. But we can do this for completeness, and quiet Coverity in the meantime. CID #1226806. Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06mtd: nand_bbt: unify/fix error handling in nand_scan_bbt()Brian Norris
Don't leak this->bbt, and return early if check_create() fails. It helps to have a single error path to avoid these problems. Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06mtd: nand_bbt: make nand_scan_bbt() staticBrian Norris
This implementation detail is no longer needed outside of nand_bbt.c. Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06mtd: diskonchip: don't call nand_scan_bbt() directlyBrian Norris
The diskonchip driver almost uses the default nand_base hooks as-is, except that it provides custom on-flash BBT descriptors and avoids using factory-marked bad blockers. So let's refactor the BBT initialization code into a private 'late_init' hook which handles all the private details. Note the usage of NAND_SKIP_BBTSCAN, which allows us to defer the BBT scan until we've prepared everything. Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06mtd: nand_bbt: drop unnecessary headerBrian Norris
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-05-06UBI: block: Add missing cache flushesKevin Cernekee
Block drivers are responsible for calling flush_dcache_page() on each BIO request. This operation keeps the I$ coherent with the D$ on architectures that don't have hardware coherency support. Without this flush, random crashes are seen when executing user programs from an ext4 filesystem backed by a ubiblock device. This patch is based on the change implemented in commit 2d4dc890b5c8 ("block: add helpers to run flush_dcache_page() against a bio and a request's pages"). Fixes: 9d54c8a33eec ("UBI: R/O block driver on top of UBI volumes") Signed-off-by: Kevin Cernekee <cernekee@chromium.org> Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-04-26Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull fourth vfs update from Al Viro: "d_inode() annotations from David Howells (sat in for-next since before the beginning of merge window) + four assorted fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: RCU pathwalk breakage when running into a symlink overmounting something fix I_DIO_WAKEUP definition direct-io: only inc/dec inode->i_dio_count for file systems fs/9p: fix readdir() VFS: assorted d_backing_inode() annotations VFS: fs/inode.c helpers: d_inode() annotations VFS: fs/cachefiles: d_backing_inode() annotations VFS: fs library helpers: d_inode() annotations VFS: assorted weird filesystems: d_inode() annotations VFS: normal filesystems (and lustre): d_inode() annotations VFS: security/: d_inode() annotations VFS: security/: d_backing_inode() annotations VFS: net/: d_inode() annotations VFS: net/unix: d_backing_inode() annotations VFS: kernel/: d_inode() annotations VFS: audit: d_backing_inode() annotations VFS: Fix up some ->d_inode accesses in the chelsio driver VFS: Cachefiles should perform fs modifications on the top layer only VFS: AF_UNIX sockets should call mknod on the top layer only
2015-04-24Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
Pull slave-dmaengine updates from Vinod Koul: - new drivers for: - Ingenic JZ4780 controller - APM X-Gene controller - Freescale RaidEngine device - Renesas USB Controller - remove device_alloc_chan_resources dummy handlers - sh driver cleanups for peri peri and related emmc and asoc patches as well - fixes and enhancements spread over the drivers * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (59 commits) dmaengine: dw: don't prompt for DW_DMAC_CORE dmaengine: shdmac: avoid unused variable warnings dmaengine: fix platform_no_drv_owner.cocci warnings dmaengine: pch_dma: fix memory leak on failure path in pch_dma_probe() dmaengine: at_xdmac: unlock spin lock before return dmaengine: xgene: devm_ioremap() returns NULL on error dmaengine: xgene: buffer overflow in xgene_dma_init_channels() dmaengine: usb-dmac: Fix dereferencing freed memory 'desc' dmaengine: sa11x0: report slave capabilities to upper layers dmaengine: vdma: Fix compilation warnings dmaengine: fsl_raid: statify fsl_re_chan_probe dmaengine: Driver support for FSL RaidEngine device. dmaengine: xgene_dma_init_ring_mngr() can be static Documentation: dma: Add documentation for the APM X-Gene SoC DMA device DTS binding arm64: dts: Add APM X-Gene SoC DMA device and DMA clock DTS nodes dmaengine: Add support for APM X-Gene SoC DMA engine driver dmaengine: usb-dmac: Add Renesas USB DMA Controller (USB-DMAC) driver dmaengine: renesas,usb-dmac: Add device tree bindings documentation dmaengine: edma: fixed wrongly initialized data parameter to the edma callback dmaengine: ste_dma40: fix implicit conversion ...
2015-04-22Merge tag 'for-linus-20150422' of git://git.infradead.org/linux-mtdLinus Torvalds
Pull MTD updates from Brian Norris: "Common MTD: - Add Kconfig option for keeping both the 'master' and 'partition' MTDs registered as devices. This would really make a better default if we could do it over, as it allows a lot more flexibility in (1) determining the flash topology of the system from user-space and (2) adding temporary partitions at runtime (ioctl(BLKPG)). Unfortunately, this would possibly cause user-space breakage, as it will cause renumbering of the /dev/mtdX devices. We'll see if we can change this in the future, as there have already been a few people looking for this feature, and I know others have just been working around our current limitations instead of fixing them this way. - Along with the previous change, add some additional information to sysfs, so user-space can read the offset of each partition within its master device SPI NOR: - add new device tree compatible binding to represent the mostly-compatible class of SPI NOR flash which can be detected by their extended JEDEC ID bytes, cutting down the duplication of our ID tables - misc. new IDs Various other miscellaneous fixes and changes" * tag 'for-linus-20150422' of git://git.infradead.org/linux-mtd: (53 commits) mtd: spi-nor: Add support for Macronix mx25u6435f serial flash mtd: spi-nor: Add support for Winbond w25q64dw serial flash mtd: spi-nor: add support for the Winbond W25X05 flash mtd: spi-nor: support en25s64 device mtd: m25p80: bind to "nor-jedec" ID, for auto-detection Documentation: devicetree: m25p80: add "nor-jedec" binding mtd: Make MTD tests cancelable mtd: mtd_oobtest: Fix bitflip_limit usage in test case 3 mtd: docg3: remove invalid __exit annotations mtd: fsl_ifc_nand: use msecs_to_jiffies for time conversion mtd: atmel_nand: don't map the ROM table if no pmecc table offset in DT mtd: atmel_nand: add a definition for the oob reserved bytes mtd: part: Remove partition overlap checks mtd: part: Add sysfs variable for offset of partition mtd: part: Create the master device node when partitioned mtd: ts5500_flash: Fix typo in MODULE_DESCRIPTION in ts5500_flash.c mtd: denali: Disable sub-page writes in Denali NAND driver mtd: pxa3xx_nand: cleanup wait_for_completion handling mtd: nand: gpmi: Check for scan_bbt() error mtd: nand: gpmi: fixup return type of wait_for_completion_timeout ...
2015-04-22Merge MTD fixes from 4.0 into -nextBrian Norris
2015-04-15Merge tag 'upstream-4.1-rc1' of git://git.infradead.org/linux-ubifsLinus Torvalds
Pull UBI/UBIFS updates from Richard Weinberger: "This pull request includes the following UBI/UBIFS changes: - powercut emulation for UBI - a huge update to UBI Fastmap - cleanups and bugfixes all over UBI and UBIFS" * tag 'upstream-4.1-rc1' of git://git.infradead.org/linux-ubifs: (50 commits) UBI: power cut emulation for testing UBIFS: fix output format of INUM_WATERMARK UBI: Fastmap: Fall back to scanning mode after ECC error UBI: Fastmap: Remove is_fm_block() UBI: Fastmap: Add blank line after declarations UBI: Fastmap: Remove else after return. UBI: Fastmap: Introduce may_reserve_for_fm() UBI: Fastmap: Introduce ubi_fastmap_init() UBI: Fastmap: Wire up WL accessor functions UBI: Add accessor functions for WL data structures UBI: Move fastmap specific functions out of wl.c UBI: Fastmap: Add new module parameter fm_debug UBI: Fastmap: Make self_check_eba() depend on fastmap self checking UBI: Fastmap: Add self check to detect absent PEBs UBI: Fix stale pointers in ubi->lookuptbl UBI: Fastmap: Enhance fastmap checking UBI: Add initial support for fastmap self checks UBI: Fastmap: Rework fastmap error paths UBI: Fastmap: Prepare for variable sized fastmaps UBI: Fastmap: Locking updates ...
2015-04-15VFS: assorted d_backing_inode() annotationsDavid Howells
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-04-14Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial tree from Jiri Kosina: "Usual trivial tree updates. Nothing outstanding -- mostly printk() and comment fixes and unused identifier removals" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: goldfish: goldfish_tty_probe() is not using 'i' any more powerpc: Fix comment in smu.h qla2xxx: Fix printks in ql_log message lib: correct link to the original source for div64_u64 si2168, tda10071, m88ds3103: Fix firmware wording usb: storage: Fix printk in isd200_log_config() qla2xxx: Fix printk in qla25xx_setup_mode init/main: fix reset_device comment ipwireless: missing assignment goldfish: remove unreachable line of code coredump: Fix do_coredump() comment stacktrace.h: remove duplicate declaration task_struct smpboot.h: Remove unused function prototype treewide: Fix typo in printk messages treewide: Fix typo in printk messages mod_devicetable: fix comment for match_flags
2015-04-13UBI: power cut emulation for testingdavid.oberhollenzer@sigma-star.at
Emulate random power cuts by switching device to ro after a number of writes to allow simple power cut testing with nand-sim. Maximum and minimum number of successful writes before power cut and what kind of writes (EC header, VID header or none) to interrupt configurable via debugfs. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-04-08Merge branch 'linus' into irq/core to get the GIC updates whichThomas Gleixner
conflict with pending GIC changes. Conflicts: drivers/usb/isp1760/isp1760-core.c
2015-04-05mtd: spi-nor: Add support for Macronix mx25u6435f serial flashMika Westerberg
Add Macronix (mx25u6435f) 8MB flash to the list of supported chips. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: spi-nor: Add support for Winbond w25q64dw serial flashMika Westerberg
Add Winbond (w25q64dw) 8MB flash to the list of supported chips. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: spi-nor: add support for the Winbond W25X05 flashGabor Juhos
Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Luka Perkov <luka@openwrt.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: spi-nor: support en25s64 deviceShengzhou Liu
Add support for EON en25s64 SPI flash. Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: m25p80: bind to "nor-jedec" ID, for auto-detectionBrian Norris
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>
2015-04-05mtd: Make MTD tests cancelableRichard Weinberger
I always go nuts when I start an MTD test on a slow device and have to wait forever until it finishes. From the debug output I already know what the issue is but I have to wait or reset the board hard. Resetting is often not an option (remote access, you don't want lose the current state, etc...). The solution is easy, check for pending signals at key positions in the code. Using that one can even stop a test by pressing CTRL-C as insmod/modprobe have SIGINT pending. Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: mtd_oobtest: Fix bitflip_limit usage in test case 3Roger Quadros
In test case 3, we set vary_offset to write at different offsets and lengths in the OOB available area. We need to do the bitflip_limit check while checking for 0xff outside the OOB offset + length area that we didn't modify during write. Signed-off-by: Roger Quadros <rogerq@ti.com> [Brian: whitespace fixup] Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: docg3: remove invalid __exit annotationsBrian Norris
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>
2015-04-05mtd: fsl_ifc_nand: use msecs_to_jiffies for time conversionNicholas Mc Guire
This is only an API consolidation and should make things more readable it replaces var * HZ / 1000 by msecs_to_jiffies(var) which helps readability and also handles all corner-cases properly. Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: atmel_nand: don't map the ROM table if no pmecc table offset in DTWu, Josh
if atmel,pmecc-lookup-table-offset is not found in DT node, we don't need to map the ROM table as we will build a runtime gf table anyway. Reported-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: atmel_nand: add a definition for the oob reserved bytesJosh Wu
It's better to use a macro instead of just a number. Signed-off-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: part: Remove partition overlap checksDan Ehrenberg
This patch makes MTD dynamic partitioning more flexible by removing overlap checks for dynamic partitions. I don't see any particular reason why overlapping dynamic partitions should be prohibited while static partitions are allowed to overlap freely. The checks previously had an off-by-one error, where 'end' should be one less than what it is currently set at, and adding partitions out of increasing order will fail. Disabling the checks resolves this issue. Signed-off-by: Dan Ehrenberg <dehrenberg@chromium.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: part: Add sysfs variable for offset of partitionDan Ehrenberg
This patch makes a sysfs variable called 'offset' on each partition which contains the offset in bytes from the beginning of the master device that the partition starts. Signed-off-by: Dan Ehrenberg <dehrenberg@chromium.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-04-05mtd: part: Create the master device node when partitionedDan Ehrenberg
For many use cases, it helps to have a device node for the entire MTD device as well as device nodes for the individual partitions. For example, this allows querying the entire device's properties. A common idiom is to create an additional partition which spans over the whole device. This patch makes a config option, CONFIG_MTD_PARTITIONED_MASTER, which makes the master partition present even when the device is partitioned. This isn't turned on by default since it presents a backwards-incompatible device numbering. The patch also makes the parent of a partition device be the master, if the config flag is set, now that the master is a full device. Signed-off-by: Dan Ehrenberg <dehrenberg@chromium.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-03-30mtd: ts5500_flash: Fix typo in MODULE_DESCRIPTION in ts5500_flash.cMasanari Iida
This patch fixes a spelling typo in MODULE_DESCRIPTION in ts5500_flash.c. Signed-off-by: Masanari Iida <standby24x7@gmail.com> [ Brian: fixed grammar in a spelling patch :) ] Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-03-30mtd: denali: Disable sub-page writes in Denali NAND driverGraham Moore
The Denali Controller IP does not support sub-page writes. Signed-off-by: Graham Moore <grmoore@opensource.altera.com> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-03-30mtd: pxa3xx_nand: cleanup wait_for_completion handlingNicholas Mc Guire
return type of wait_for_completion_timeout is unsigned long not int, this patch uses the return value of wait_for_completion_timeout in the condition directly rather than assigning it to an incorrect type variable. The variable used for handling the return of wait_for_cmpletion_timeout was int but should be unsigned long, where it was not in use for anything else and the return value in case of completion (>0) is not used it was removed and wait_for_completion_timeout() used directly in the if condition. To make the timeout values a bit simpler to read and also handle all of the corner cases correctly the declarations are moved to msecs_to_jiffies(). The timeout declaration cleanup is just for readability Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>