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2014-07-09mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in ↵pekon gupta1-1/+1
erased-page commit f306e8c3b667632952f1a4a74ffb910bbc06255f upstream. fixes: commit 62116e5171e00f85a8d53f76e45b84423c89ff34 mtd: nand: omap2: Support for hardware BCH error correction. In omap_elm_correct_data(), if bitflip_count in an erased-page is within the correctable limit (< ecc.strength), then it is not indicated back to the caller ecc->read_page(). This mis-guides upper layers like MTD and UBIFS layer to assume erased-page as perfectly clean and use it for writing even if actual bitflip_count was dangerously high (bitflip_count > mtd->bitflip_threshold). This patch fixes this above issue, by returning 'stats' to caller ecc->read_page() under all scenarios. Reported-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-09mtd: eLBC NAND: fix subpage write supportPekon Gupta1-0/+14
commit f034d87def51f026b735d1e2877e9387011b2ba3 upstream. As subpage write is enabled by default for all drivers, nand_write_subpage_hwecc causes a crash if the driver did not register ecc->hwctl or ecc->calculate. This behavior was introduced in commit 837a6ba4f3b6d23026674e6af6b6849a4634fff9 "mtd: nand: subpage write support for hardware based ECC schemes". This fixes a crash by emulating subpage write support by padding sub-page data with 0xff on either sides to make it full page compatible. Reported-by: Helmut Schaa <helmut.schaa@googlemail.com> Tested-by: Helmut Schaa <helmut.schaa@googlemail.com> Signed-off-by: Pekon Gupta <pekon@ti.com> Reviewed-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-13mtd: nuc900_nand: NULL dereference in nuc900_nand_enable()Dan Carpenter1-1/+1
commit c69dbbf3335a21aae74376d7e5db50a486d52439 upstream. Instead of writing to "nand->reg + REG_FMICSR" we write to "REG_FMICSR" which is NULL and not a valid register. Fixes: 8bff82cbc308 ('mtd: add nand support for w90p910 (v2)') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-13mtd: atmel_nand: Disable subpage NAND write when using Atmel PMECCHerve Codina1-0/+1
commit 90445ff6241e2a13445310803e2efa606c61f276 upstream. Crash detected on sam5d35 and its pmecc nand ecc controller. The problem was a call to chip->ecc.hwctl from nand_write_subpage_hwecc (nand_base.c) when we write a sub page. chip->ecc.hwctl function is not set when we are using PMECC controller. As a workaround, set NAND_NO_SUBPAGE_WRITE for PMECC controller in order to disable sub page access in nand_write_page. Signed-off-by: Herve Codina <Herve.CODINA@celad.com> Acked-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-13mtd: mxc_nand: remove duplicated ecc_stats countingMichael Grzeschik1-1/+0
commit 0566477762f9e174e97af347ee9c865f908a5647 upstream. The ecc_stats.corrected count variable will already be incremented in the above framework-layer just after this callback. Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-12-04mtd: gpmi: fix kernel BUG due to racing DMA operationsHuang Shijie1-2/+2
commit 7b3d2fb92067bcb29f0f085a9fa9fa64920a6646 upstream. [1] The gpmi uses the nand_command_lp to issue the commands to NAND chips. The gpmi issues a DMA operation with gpmi_cmd_ctrl when it handles a NAND_CMD_NONE control command. So when we read a page(NAND_CMD_READ0) from the NAND, we may send two DMA operations back-to-back. If we do not serialize the two DMA operations, we will meet a bug when 1.1) we enable CONFIG_DMA_API_DEBUG, CONFIG_DMADEVICES_DEBUG, and CONFIG_DEBUG_SG. 1.2) Use the following commands in an UART console and a SSH console: cmd 1: while true;do dd if=/dev/mtd0 of=/dev/null;done cmd 1: while true;do dd if=/dev/mmcblk0 of=/dev/null;done The kernel log shows below: ----------------------------------------------------------------- kernel BUG at lib/scatterlist.c:28! Unable to handle kernel NULL pointer dereference at virtual address 00000000 ......................... [<80044a0c>] (__bug+0x18/0x24) from [<80249b74>] (sg_next+0x48/0x4c) [<80249b74>] (sg_next+0x48/0x4c) from [<80255398>] (debug_dma_unmap_sg+0x170/0x1a4) [<80255398>] (debug_dma_unmap_sg+0x170/0x1a4) from [<8004af58>] (dma_unmap_sg+0x14/0x6c) [<8004af58>] (dma_unmap_sg+0x14/0x6c) from [<8027e594>] (mxs_dma_tasklet+0x18/0x1c) [<8027e594>] (mxs_dma_tasklet+0x18/0x1c) from [<8007d444>] (tasklet_action+0x114/0x164) ----------------------------------------------------------------- 1.3) Assume the two DMA operations is X (first) and Y (second). The root cause of the bug: Assume process P issues DMA X, and sleep on the completion @this->dma_done. X's tasklet callback is dma_irq_callback. It firstly wake up the process sleeping on the completion @this->dma_done, and then trid to unmap the scatterlist S. The waked process P will issue Y in another ARM core. Y initializes S->sg_magic to zero with sg_init_one(), while dma_irq_callback is unmapping S at the same time. See the diagram: ARM core 0 | ARM core 1 ------------------------------------------------------------- (P issues DMA X, then sleep) --> | | (X's tasklet wakes P) --> | | | <-- (P begin to issue DMA Y) | (X's tasklet unmap the | scatterlist S with dma_unmap_sg) --> | <-- (Y calls sg_init_one() to init | scatterlist S) | [2] This patch serialize both the X and Y in the following way: Unmap the DMA scatterlist S firstly, and wake up the process at the end of the DMA callback, in such a way, Y will be executed after X. After this patch: ARM core 0 | ARM core 1 ------------------------------------------------------------- (P issues DMA X, then sleep) --> | | (X's tasklet unmap the | scatterlist S with dma_unmap_sg) --> | | (X's tasklet wakes P) --> | | | <-- (P begin to issue DMA Y) | | <-- (Y calls sg_init_one() to init | scatterlist S) | Signed-off-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-12-04mtd: nand: hack ONFI for non-power-of-2 dimensionsBrian Norris1-2/+13
commit 4355b70cf48363c50a9de450b01178c83aba8f6a upstream. Some bright specification writers decided to write this in the ONFI spec (from ONFI 3.0, Section 3.1): "The number of blocks and number of pages per block is not required to be a power of two. In the case where one of these values is not a power of two, the corresponding address shall be rounded to an integral number of bits such that it addresses a range up to the subsequent power of two value. The host shall not access upper addresses in a range that is shown as not supported." This breaks every assumption MTD makes about NAND block/chip-size dimensions -- they *must* be a power of two! And of course, an enterprising manufacturer has made use of this lovely freedom. Exhibit A: Micron MT29F32G08CBADAWP "- Plane size: 2 planes x 1064 blocks per plane - Device size: 32Gb: 2128 blockss [sic]" This quickly hits a BUG() in nand_base.c, since the extra dimensions overflow so we think it's a second chip (on my single-chip setup): ONFI param page 0 valid ONFI flash detected NAND device: Manufacturer ID: 0x2c, Chip ID: 0x44 (Micron MT29F32G08CBADAWP), 4256MiB, page size: 8192, OOB size: 744 ------------[ cut here ]------------ kernel BUG at drivers/mtd/nand/nand_base.c:203! Internal error: Oops - BUG: 0 [#1] SMP ARM [... trim ...] [<c02cf3e4>] (nand_select_chip+0x18/0x2c) from [<c02d25c0>] (nand_do_read_ops+0x90/0x424) [<c02d25c0>] (nand_do_read_ops+0x90/0x424) from [<c02d2dd8>] (nand_read+0x54/0x78) [<c02d2dd8>] (nand_read+0x54/0x78) from [<c02ad2c8>] (mtd_read+0x84/0xbc) [<c02ad2c8>] (mtd_read+0x84/0xbc) from [<c02d4b28>] (scan_read.clone.4+0x4c/0x64) [<c02d4b28>] (scan_read.clone.4+0x4c/0x64) from [<c02d4c88>] (search_bbt+0x148/0x290) [<c02d4c88>] (search_bbt+0x148/0x290) from [<c02d4ea4>] (nand_scan_bbt+0xd4/0x5c0) [... trim ...] ---[ end trace 0c9363860d865ff2 ]--- So to fix this, just truncate these dimensions down to the greatest power-of-2 dimension that is less than or equal to the specified dimension. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-26mtd: nand: fix NAND_BUSWIDTH_AUTO for x16 devicesBrian Norris1-3/+5
commit 68e8078072e802e77134664f11d2ffbfbd2f8fbe upstream. The code for NAND_BUSWIDTH_AUTO is broken. According to Alexander: "I have a problem with attach NAND UBI in 16 bit mode. NAND works fine if I specify NAND_BUSWIDTH_16 option, but not working with NAND_BUSWIDTH_AUTO option. In second case NAND chip is identifyed with ONFI." See his report for the rest of the details: http://lists.infradead.org/pipermail/linux-mtd/2013-July/047515.html Anyway, the problem is that nand_set_defaults() is called twice, we intend it to reset the chip functions to their x16 buswidth verions if the buswidth changed from x8 to x16; however, nand_set_defaults() does exactly nothing if called a second time. Fix this by hacking nand_set_defaults() to reset the buswidth-dependent functions if they were set to the x8 version the first time. Note that this does not do anything to reset from x16 to x8, but that's not the supported use case for NAND_BUSWIDTH_AUTO anyway. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reported-by: Alexander Shiyan <shc_work@mail.ru> Tested-by: Alexander Shiyan <shc_work@mail.ru> Cc: Matthieu Castet <matthieu.castet@parrot.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-14mtd: omap2: allow bulding as a moduleArnd Bergmann1-1/+1
commit 930d800bded771b26d9944c47810829130ff7c8c upstream. The omap2 nand device driver calls into the the elm code, which can be a loadable module, and in that case it cannot be built-in itself. I can see no reason why the omap2 driver cannot also be a module, so let's make the option "tristate" in Kconfig to fix this allmodconfig build error: ERROR: "elm_config" [drivers/mtd/nand/omap2.ko] undefined! ERROR: "elm_decode_bch_error_page" [drivers/mtd/nand/omap2.ko] undefined! Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Tony Lindgren <tony@atomide.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Cc: Afzal Mohammed <afzal@ti.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-18drivers/mtd/nand: don't check resource with devm_ioremap_resourceWolfram Sang1-5/+0
devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-05-09Merge tag 'for-linus-20130509' of git://git.infradead.org/linux-mtdLinus Torvalds25-1688/+300
Pull MTD update from David Woodhouse: - Lots of cleanups from Artem, including deletion of some obsolete drivers - Support partitions larger than 4GiB in device tree - Support for new SPI chips * tag 'for-linus-20130509' of git://git.infradead.org/linux-mtd: (83 commits) mtd: omap2: Use module_platform_driver() mtd: bf5xx_nand: Use module_platform_driver() mtd: denali_dt: Remove redundant use of of_match_ptr mtd: denali_dt: Change return value to fix smatch warning mtd: denali_dt: Use module_platform_driver() mtd: denali_dt: Fix incorrect error check mtd: nand: subpage write support for hardware based ECC schemes mtd: omap2: use msecs_to_jiffies() mtd: nand_ids: use size macros mtd: nand_ids: improve LEGACY_ID_NAND macro a bit mtd: add 4 Toshiba nand chips for the full-id case mtd: add the support to parse out the full-id nand type mtd: add new fields to nand_flash_dev{} mtd: sh_flctl: Use of_match_ptr() macro mtd: gpio: Use of_match_ptr() macro mtd: gpio: Use devm_kzalloc() mtd: davinci_nand: Use of_match_ptr() mtd: dataflash: Use of_match_ptr() macro mtd: remove h720x flash support mtd: onenand: remove OneNAND simulator ...
2013-05-09Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linuxLinus Torvalds1-1/+1
Pull removal of GENERIC_GPIO from Grant Likely: "GENERIC_GPIO now synonymous with GPIOLIB. There are no longer any valid cases for enableing GENERIC_GPIO without GPIOLIB, even though it is possible to do so which has been causing confusion and breakage. This branch does the work to completely eliminate GENERIC_GPIO." * tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux: gpio: update gpio Chinese documentation Remove GENERIC_GPIO config option Convert selectors of GENERIC_GPIO to GPIOLIB blackfin: force use of gpiolib m68k: coldfire: use gpiolib mips: pnx833x: remove requirement for GENERIC_GPIO openrisc: default GENERIC_GPIO to false avr32: default GENERIC_GPIO to false xtensa: remove explicit selection of GENERIC_GPIO sh: replace CONFIG_GENERIC_GPIO by CONFIG_GPIOLIB powerpc: remove redundant GENERIC_GPIO selection unicore32: default GENERIC_GPIO to false unicore32: remove unneeded select GENERIC_GPIO arm: plat-orion: use GPIO driver on CONFIG_GPIOLIB arm: remove redundant GENERIC_GPIO selection mips: alchemy: require gpiolib mips: txx9: change GENERIC_GPIO to GPIOLIB mips: loongson: use GPIO driver on CONFIG_GPIOLIB mips: remove redundant GENERIC_GPIO select
2013-04-16Convert selectors of GENERIC_GPIO to GPIOLIBAlexandre Courbot1-1/+1
GENERIC_GPIO is now equivalent to GPIOLIB and features that depended on GENERIC_GPIO can now depend on GPIOLIB to allow removal of this option. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Grant Likely <grant.likely@secretlab.ca>
2013-04-05mtd: bf5xx_nand: Use module_platform_driver()Sachin Kamat1-15/+1
module_platform_driver macro removes some boilerplate and makes the code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: denali_dt: Remove redundant use of of_match_ptrSachin Kamat1-1/+1
Since this driver is dt only and denali_nand_dt_ids is always compiled in, use of of_match_ptr() macro is not necessary. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: denali_dt: Change return value to fix smatch warningSachin Kamat1-1/+1
platform_get_irq() also returns -ENXIO upon failure. Use it instead of hardcoded return type. Fixes the following smatch warning: drivers/mtd/nand/denali_dt.c:93 denali_dt_probe() info: why not propagate 'denali->irq' from platform_get_irq() instead of (-6)? Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: denali_dt: Use module_platform_driver()Sachin Kamat1-11/+1
module_platform_driver() removes some boilerplate and makes the code simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: denali_dt: Fix incorrect error checkSachin Kamat1-1/+1
The return value of devm_ioremap_nocache should be checked here instead of res. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand: subpage write support for hardware based ECC schemesGupta, Pekon3-17/+90
This patch adds support for subpage (partial-page) writes when using hardware based ECC schemes. Advantages: (1) reduces storage overhead when using file-systems like UBIFS, which store LEB header at page-size granularity. (2) allows independent subpage writes, thereby increasing NAND storage efficiency for non-page aligned data. + updated cafe_nand and lpc32xx_mlc NAND drivers for change in chip->write_page interface. Signed-off-by: Gupta, Pekon <pekon@ti.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: omap2: use msecs_to_jiffies()Toan Pham1-2/+2
Fix mtd-utils from returning -EIO. Formatting jffs2 filesystem was impossible when CONFIG_HZ was set to a low value. Signed-off-by: Toan Pham <tpham3783@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand_ids: use size macrosArtem Bityutskiy2-55/+56
Use the convenient 'SZ_8K' and 'SZ_16K' macros for the eraseblock size in the NAND IDs table. This is a little more readable. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand_ids: improve LEGACY_ID_NAND macro a bitArtem Bityutskiy2-55/+55
Notice that all the flashes belonging to the "legacy ID" class have 512 bytes NAND page. This means we may simplify the 'LEGACY_ID_NAND()' macro as well as the NAND ID table a little. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: add 4 Toshiba nand chips for the full-id caseHuang Shijie1-0/+19
I have 4 Toshiba nand chips which can not be parsed out by the id data. We can not get the oob size from the id data. So add them as the full-id nand chips in the first of nand_flash_ids. The comment for the full-id items is from Brian. Signed-off-by: Huang Shijie <b32955@freescale.com> Reviewed-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: add the support to parse out the full-id nand typeHuang Shijie1-3/+32
When we meet a full-id nand type whose @id_len is not zero, we can use the find_full_id_nand() to parse out the necessary information for a nand chip. If we meet a non full-id nand type, we can handle it in the legacy way. Signed-off-by: Huang Shijie <b32955@freescale.com> Reviewed-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: sh_flctl: Use of_match_ptr() macroSachin Kamat1-2/+1
This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: gpio: Use of_match_ptr() macroSachin Kamat1-2/+1
This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: gpio: Use devm_kzalloc()Sachin Kamat1-4/+1
devm_kzalloc() is device managed and makes cleanup simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: davinci_nand: Use of_match_ptr()Sachin Kamat1-2/+2
This eliminates having an #ifdef returning NULL for the case when OF is disabled. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: remove the h1910 NAND driverArtem Bityutskiy3-174/+0
This driver is marked as broken for 2 years, and no one cares to make it compile and work. Now it is time to zap it. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: remove the ppchameleonevb NAND driverArtem Bityutskiy3-410/+0
This driver has been marked as broken for long time and it depends on a non-existing PPCHAMELEONEVB Kconfig symbol. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: davinci_nand: use module_platform_driver_probe()Jingoo Han1-11/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: txx9ndfmc: use module_platform_driver_probe()Jingoo Han1-12/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: sh_flctl: use module_platform_driver_probe()Jingoo Han1-12/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: fsmc_nand: use module_platform_driver_probe()Jingoo Han1-12/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: atmel_nand: use module_platform_driver_probe()Jingoo Han1-14/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: orion_nand: use module_platform_driver_probe()Jingoo Han1-12/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: doc: use module_platform_driver_probe()Jingoo Han1-12/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: devices: elm: check for device's presence before configurationDaniel Mack1-2/+3
In case the driver is not probed - due to config mismatches or errors in the DTS files - dev_get_drvdata() returns NULL, leading to an Ooops during boot. Make elm_config() return an error in such cases to propagate the error up to the user, so it can fall back to software mode. Signed-off-by: Daniel Mack <zonque@gmail.com> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand_base: Removed unnecessary cleaning "onfi_version" variableAlexander Shiyan1-2/+0
Variable "onfi_version" is already set to zero before nand_flash_detect_onfi() call, so additional cleaning is not necessary. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand_base: Removed unnecessary command maskingAlexander Shiyan1-2/+1
NAND command, passed to cmd_ctrl(), is masked with 0xff. This patch removes this since masking is not necessary and masking is not performed in other places for same call. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand_ids: introduce helper macrosArtem Bityutskiy2-111/+109
Introduce helper macros for defining NAND chips. These macros do not really add much value in the current code-base. However, we are going to add full ID support which adds some more complexity to the table, and helper macros become useful for readability. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand: remove few tiny page NAND bitsArtem Bityutskiy3-13/+4
NAND flashes with 256 bytes NAND pages are so old that probably do not exist any more. Let's remove few related pieces of code and forget about them forever. The assumption will be that 512 bytes NAND page size is the minimum possible. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand: rename the id field of 'struct nand_flash_dev'Artem Bityutskiy3-5/+5
The 'id' is a bit confusing name because NAND IDs are multi-byte. Re-name it to 'dev_id' to make it clear that this is the "device ID" part (the second byte). While on it, clean-up the commentary for 'struct nand_flash_dev'. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand: use NAND_HAS_CACHEPROGArtem Bityutskiy1-1/+1
We have this unused macro, let's use it and justify its existence. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand: remove a bunch of unused commandsArtem Bityutskiy4-33/+0
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand: remove AG-AND supportArtem Bityutskiy3-116/+2
We have only one AG-AND driver and it was not touched since 2005. It looks like AG-AND was not really make it to mass-production and can be considered a dead technology. Along with the AG-AND support, this patch removes the BBT_AUTO_REFRESH feature, because the only user of this feature is AG-AND. And even though it is implemented as a generic feature, I prefer to remove it because NAND flashes do not really need it in this form. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand: remove the rtc_from4 driver supportArtem Bityutskiy3-635/+0
The AG-AND support is about to be removed from MTD, because this technology is dead for long time. Thus, remove this the only AG-AND driver we have in the kernel tree. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: decommission the NAND museumArtem Bityutskiy2-25/+5
The MTD subsystem has its own small museum of ancient NANDs in a form of the CONFIG_MTD_NAND_MUSEUM_IDS configuration option. The museum contains stone age NANDs with 256 bytes pages, as well as iron age NANDs with 512 bytes per page and up to 8MiB page size. It is with great sorrow that I inform you that the museum is being decommissioned. The MTD subsystem is out of budget for Kconfig options and already has too many of them, and there is a general kernel trend to simplify the configuration menu. We remove the stone age exhibits along with closing the museum, but some of the iron age ones are transferred to the regular NAND depot. Namely, only those which have unique device IDs are transferred, and the ones which have conflicting device IDs are removed. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-05mtd: nand_ids: minor clean-upsArtem Bityutskiy1-19/+15
Clean-up the code a little bit: * clean-up commentaries. * move macro definitions to the top of the file. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2013-04-04mtd: gpmi: move to use generic DMA helperShawn Guo2-52/+2
With the generic DMA device tree helper supported by mxs-dma driver, client devices only need to call dma_request_slave_channel() for requesting a DMA channel from dmaengine. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 14:56:54 +0000