linux/drivers/mtd, branch v3.12

mtd: gpmi: fix ECC regression

2013-10-25T17:09:43Z

The "legacy" ECC layout used until 3.12-rc1 uses all the OOB area by computing the ECC strength and ECC step size ourselves. Commit 2febcdf84b ("mtd: gpmi: set the BCHs geometry with the ecc info") makes the driver use the ECC info (ECC strength and ECC step size) provided by the MTD code, and creates a different NAND ECC layout for the BCH, and use the new ECC layout. This causes a regression: We can not mount the ubifs which was created by the old NAND ECC layout. This patch fixes this issue by reverting to the legacy ECC layout. We will probably introduce a new device-tree property to indicate that the new ECC layout can be used. For now though, for the imminent 3.12 release, we just unconditionally revert to the 3.11 behaviour. This leaves a harmless cosmetic warning about an unused function. At this point in the cycle I really don't care. Signed-off-by: David Woodhouse Signed-off-by: Brian Norris Acked-by: Huang Shijie Acked-by: Marek Vasut Tested-by: Marek Vasut

mtd: nand: pxa3xx: Fix registered MTD name

2013-10-24T21:44:28Z

In a recent commit: commit f455578dd961087a5cf94730d9f6489bb1d355f0 Author: Ezequiel Garcia Date: Mon Aug 12 14:14:53 2013 -0300 mtd: nand: pxa3xx: Remove hardcoded mtd name There's no advantage in using a hardcoded name for the mtd device. Instead use the provided by the platform_device. The MTD name was changed to use the one provided by the platform_device. However, this can be problematic as some users want to set partitions using the kernel parameter 'mtdparts', where the name is needed. Therefore, to avoid regressions in users relying in 'mtdparts' we revert the change and use the previous one 'pxa3xx_nand-0'. While at it, let's put a big comment and prevent this change from happening ever again. Signed-off-by: Ezequiel Garcia Signed-off-by: Brian Norris

mtd: m25p80: Fix 4 byte addressing mode for Micron devices.

2013-09-27T10:56:22Z

According to the datasheet for Micron n25q256a (N25Q256A13ESF40F) 4-byte addressing mode should be entered as follows: To enter or exit the 4-byte address mode, the WRITE ENABLE command must be executed to set the write enable latch bit to 1. (Note: The WRITE ENABLE command must NOT be executed on the N25Q256A83ESF40x and N25Q256A83E1240x devices.) S# must be driven LOW. The effect of the command is immediate; after the command has been executed, the write enable latch bit is cleared to 0. Micron's portable way to perform this for all types of Micron flash is to first issue a write enable, then switch the addressing mode followed by a write disable to avoid leaving the flash in a write- able state. Signed-off-by: Elie De Brauwer [Brian: reworked a bit] Signed-off-by: Brian Norris Signed-off-by: David Woodhouse

mtd: nand: fix memory leak in ONFI extended parameter page

2013-09-27T10:48:02Z

This fixes a memory leak in the ONFI support code for detecting the required ECC levels from this commit: commit 6dcbe0cdd83fb5f77be4f44c9e06c535281c375a Author: Huang Shijie Date: Wed May 22 10:28:27 2013 +0800 mtd: get the ECC info from the Extended Parameter Page In the success case, we never freed the 'ep' buffer. Also, this fixes an oversight in the same commit where we (harmlessly) freed the NULL pointer. Signed-off-by: Brian Norris Acked-by: Huang Shijie Signed-off-by: David Woodhouse

mtd: nand: pxa3xx: Remove unneeded ifdef CONFIG_OF

2013-09-17T16:08:14Z

There's no need to enclose this code within idef CONFIG_OF, because the OF framework provides no-op stubs if CONFIG_OF=n. Cc: devicetree@vger.kernel.org Signed-off-by: Ezequiel Garcia Signed-off-by: Brian Norris Signed-off-by: Olof Johansson

Merge tag 'upstream-3.12-rc1' of git://git.infradead.org/linux-ubi

2013-09-16T19:37:52Z

Pull UBI fixes from Artem Bityutskiy: "Just a single fastmap fix plus a regression fix" * tag 'upstream-3.12-rc1' of git://git.infradead.org/linux-ubi: UBI: Fix invalidate_fastmap() UBI: Fix PEB leak in wear_leveling_worker()

Merge tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd

2013-09-09T17:33:19Z

Pull mtd updates from David Woodhouse: - factor out common code from MTD tests - nand-gpio cleanup and portability to non-ARM - m25p80 support for 4-byte addressing chips, other new chips - pxa3xx cleanup and support for new platforms - remove obsolete alauda, octagon-5066 drivers - erase/write support for bcm47xxsflash - improve detection of ECC requirements for NAND, controller setup - NFC acceleration support for atmel-nand, read/write via SRAM - etc * tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd: (184 commits) mtd: chips: Add support for PMC SPI Flash chips in m25p80.c mtd: ofpart: use for_each_child_of_node() macro mtd: mtdswap: replace strict_strtoul() with kstrtoul() mtd cs553x_nand: use kzalloc() instead of memset mtd: atmel_nand: fix error return code in atmel_nand_probe() mtd: bcm47xxsflash: writing support mtd: bcm47xxsflash: implement erasing support mtd: bcm47xxsflash: convert to module_platform_driver instead of init/exit mtd: bcm47xxsflash: convert kzalloc to avoid invalid access mtd: remove alauda driver mtd: nand: mxc_nand: mark 'const' properly mtd: maps: cfi_flagadm: add missing __iomem annotation mtd: spear_smi: add missing __iomem annotation mtd: r852: Staticize local symbols mtd: nandsim: Staticize local symbols mtd: impa7: add missing __iomem annotation mtd: sm_ftl: Staticize local symbols mtd: m25p80: add support for mr25h10 mtd: m25p80: make CONFIG_M25PXX_USE_FAST_READ safe to enable mtd: m25p80: Pass flags through CAT25_INFO macro ...

mtd: chips: Add support for PMC SPI Flash chips in m25p80.c

2013-08-30T22:57:37Z

Add support for PMC (now Chingis, part of ISSI) Pm25LV512 (512 Kib), Pm25LV010 (1 Mib) and Pm25LQ032 (32 Mib) SPI Flash chips. This patch addresses two generations of PMC SPI Flash chips: - Pm25LV512 and Pm25LV010: these have 4KiB sectors and 32KiB blocks. The 4KiB sector erase uses a non-standard opcode (0xd7). They do not support JEDEC RDID (0x9f), and so they can only be detected by matching their name string with pre-configured platform data. Because of the cascaded acquisitions, the datasheet is no longer available on the current manufacturer's website, although it is still commonly used in some recent wireless routers (). The only public datasheet available seems to be on GeoCities: - Pm25LQ032: a newer generation flash, with 4KiB sectors and 64KiB blocks. It uses the standard erase and JEDEC read-ID opcodes. Manufacturer's datasheet is here: This patch is resent in order to take into account both Brian Norris remarks and this upstream patch: commit e534ee4f9ca29fdb38eea4b0c53f2154fbd8c1ee Author: Krzysztof Mazur Date: Fri Feb 22 15:51:05 2013 +0100 mtd: m25p80: introduce SST_WRITE flag for SST byte programming Not all SST devices implement the SST byte programming command. Some devices (like SST25VF064C) implement only standard m25p80 page write command. Now SPI flash devices that need sst_write() are explicitly marked with new SST_WRITE flag and the decision to use sst_write() is based on this flag instead of manufacturer id. Signed-off-by: Gabor Juhos Signed-off-by: Michel Stempin [Brian: fixed conflict] Signed-off-by: Brian Norris Signed-off-by: David Woodhouse

mtd: ofpart: use for_each_child_of_node() macro

2013-08-30T20:52:57Z

Use for_each_child_of_node() macro instead of open coding it. Signed-off-by: Wei Yongjun Acked-by: Huang Shijie Signed-off-by: David Woodhouse

mtd: mtdswap: replace strict_strtoul() with kstrtoul()

2013-08-30T20:52:51Z

The usage of strict_strtoul() is not preferred, because strict_strtoul() is obsolete. Thus, kstrtoul() should be used. Signed-off-by: Jingoo Han Signed-off-by: Brian Norris Signed-off-by: David Woodhouse