Hello, This patchset aims at getting rid of the nand_ecclayout limitations. struct nand_ecclayout is defining fixed eccpos and oobfree arrays which can only be increased by modifying the MTD_MAX_ECCPOS_ENTRIES_LARGE and MTD_MAX_OOBFREE_ENTRIES_LARGE macros. This approach forces us to modify the macro values each time we add a new NAND chip with a bigger OOB area, and increasing these arrays also penalize all platforms, even those who only support small NAND devices (with small OOB area). The idea to overcome this limitation, is to define the ECC/OOB layout by the mean of two functions: ->eccpos() and ->oobfree(), which will basically return the same information has those stored in the nand_ecclayout struct. Another advantage of this solution is that ECC layouts are usually following a repetitive pattern (i.e. leave X bytes free and put Y bytes of ECC per ECC chunk), which allows one to implement the ->eccpos() and ->oobfree() functions with a simple logic that can be applied to any size of OOB. Patches 1 to 10 are just cleanups or trivial fixes that can be taken independently. Patch 19 is just an aggregate of several smaller commits (one per driver), and has been submitted this way to limit the size of the series. If everybody agrees on this approach, I'll resubmit the series will those changes separated in different commits (as done here [1]). Also note that the last two commits are removing the nand_ecclayout definition, thus preventing any new driver to use this structure. Of course, this step can be delayed if some of the previous patches are not accepted. Best Regards, Boris [1]https://github.com/bbrezillon/linux-sunxi/commits/nand/ecclayout2 Boris Brezillon (23): mtd: kill the ecclayout->oobavail field mtd: inftl: kill unused oobinfo field mtd: nftl: kill unused oobinfo field mtd: nand: s3c2410: kill the ->ecc_layout field mtd: nand: jz4770: kill the ->ecc_layout field mtd: nand: kill unused ->ecclayout field in platform_nand_chip struct staging: mt29f_spinand: kill unused ecclayout field mtd: nand: lpc32xx_mlc: fix ecc.size mtd: nand: vf610: remove useless mtd->ecclayout assignment mtd: nand: simplify nand_bch_init() usage mtd: add mtd_eccpos(), mtd_oobfree() and mtd_eccbytes() helper functions mtd: use mtd_eccpos() and mtd_oobfree() where appropriate mtd: add mtd_set_ecclayout() helper function mtd: use mtd_set_ecclayout() where appropriate mtd: create an mtd_ooblayout_ops struct to ease ECC layout definition mtd: docg3: switch to mtd_ooblayout_ops mtd: nand: implement the default mtd_ooblayout_ops mtd: nand: bch: switch to nand_ecclayout_pos mtd: nand: switch all drivers to mtd_ooblayout_ops mtd: onenand: switch to mtd_ooblayout_ops staging: mt29f_spinand: switch to mtd_ooblayout_ops mtd: nand: kill layout field mtd: kill the nand_ecclayout struct arch/arm/mach-pxa/spitz.c | 41 +++- arch/arm/plat-samsung/devs.c | 9 - arch/mips/include/asm/mach-jz4740/jz4740_nand.h | 4 +- arch/mips/jz4740/board-qi_lb60.c | 83 ++++--- drivers/mtd/devices/docg3.c | 39 +++- drivers/mtd/mtdchar.c | 95 +++++--- drivers/mtd/mtdconcat.c | 2 +- drivers/mtd/mtdpart.c | 22 +- drivers/mtd/mtdswap.c | 20 +- drivers/mtd/nand/atmel_nand.c | 100 ++++---- drivers/mtd/nand/bf5xx_nand.c | 47 ++-- drivers/mtd/nand/brcmnand/brcmnand.c | 258 ++++++++++++--------- drivers/mtd/nand/cafe_nand.c | 42 +++- drivers/mtd/nand/davinci_nand.c | 114 ++++----- drivers/mtd/nand/denali.c | 48 ++-- drivers/mtd/nand/diskonchip.c | 34 ++- drivers/mtd/nand/docg4.c | 30 ++- drivers/mtd/nand/fsl_elbc_nand.c | 79 ++++--- drivers/mtd/nand/fsl_ifc_nand.c | 226 +++++------------- drivers/mtd/nand/fsmc_nand.c | 294 +++++++----------------- drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 57 +++-- drivers/mtd/nand/hisi504_nand.c | 27 ++- drivers/mtd/nand/jz4740_nand.c | 5 +- drivers/mtd/nand/lpc32xx_mlc.c | 51 ++-- drivers/mtd/nand/lpc32xx_slc.c | 41 +++- drivers/mtd/nand/mxc_nand.c | 206 ++++++++--------- drivers/mtd/nand/nand_base.c | 229 ++++++++++-------- drivers/mtd/nand/nand_bch.c | 45 ++-- drivers/mtd/nand/omap2.c | 219 ++++++++++-------- drivers/mtd/nand/plat_nand.c | 1 - drivers/mtd/nand/pxa3xx_nand.c | 101 ++++---- drivers/mtd/nand/s3c2410.c | 31 ++- drivers/mtd/nand/sh_flctl.c | 80 +++++-- drivers/mtd/nand/sharpsl.c | 2 +- drivers/mtd/nand/sm_common.c | 88 +++++-- drivers/mtd/nand/sunxi_nand.c | 112 ++++----- drivers/mtd/nand/vf610_nfc.c | 36 +-- drivers/mtd/onenand/onenand_base.c | 221 ++++++++++-------- drivers/mtd/tests/oobtest.c | 49 ++-- drivers/staging/mt29f_spinand/mt29f_spinand.c | 45 ++-- drivers/staging/mt29f_spinand/mt29f_spinand.h | 1 - fs/jffs2/wbuf.c | 6 +- include/linux/mtd/inftl.h | 1 - include/linux/mtd/mtd.h | 60 ++++- include/linux/mtd/nand.h | 6 +- include/linux/mtd/nand_bch.h | 8 +- include/linux/mtd/nftl.h | 1 - include/linux/mtd/onenand.h | 2 - include/linux/mtd/sharpsl.h | 2 +- include/linux/platform_data/mtd-nand-s3c2410.h | 1 - include/uapi/mtd/mtd-abi.h | 2 +- 51 files changed, 1763 insertions(+), 1560 deletions(-) -- 2.1.4 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
