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470c29d1c2
Driver are responsible for setting up ECC parameters correctly.
Those include:
- Check if ECC parameters specified (usually by DT) are valid
- Meet the chip's ECC requirement
- Maximize ECC strength if NAND_ECC_MAXIMIZE flag is set
The logic can be generalized by factoring out common code.
This commit adds 3 helpers to the NAND framework:
nand_check_ecc_caps - Check if preset step_size and strength are valid
nand_match_ecc_req - Match the chip's requirement
nand_maximize_ecc - Maximize the ECC strength
To use the helpers above, a driver needs to provide:
- Data array of supported ECC step size and strength
- A hook that calculates ECC bytes from the combination of
step_size and strength.
By using those helpers, code duplication among drivers will be
reduced.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[Linux commit: 2c8f8afa7f92acb07641bf95b940d384ed1d0294]
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| .. | ||
| byteorder | ||
| mtd | ||
| unaligned | ||
| usb | ||
| apm_bios.h | ||
| arm-smccc.h | ||
| bch.h | ||
| bitfield.h | ||
| bitops.h | ||
| bitrev.h | ||
| bug.h | ||
| build_bug.h | ||
| compat.h | ||
| compiler-clang.h | ||
| compiler-gcc.h | ||
| compiler-intel.h | ||
| compiler.h | ||
| crc7.h | ||
| crc8.h | ||
| crc32.h | ||
| ctype.h | ||
| delay.h | ||
| dma-direction.h | ||
| drm_dp_helper.h | ||
| edd.h | ||
| err.h | ||
| errno.h | ||
| ethtool.h | ||
| fb.h | ||
| immap_qe.h | ||
| input.h | ||
| io.h | ||
| ioctl.h | ||
| iopoll.h | ||
| ioport.h | ||
| kbuild.h | ||
| kconfig.h | ||
| kernel.h | ||
| libfdt.h | ||
| libfdt_env.h | ||
| linkage.h | ||
| linux_string.h | ||
| list.h | ||
| list_sort.h | ||
| log2.h | ||
| lzo.h | ||
| math64.h | ||
| mbus.h | ||
| mc146818rtc.h | ||
| mdio.h | ||
| mii.h | ||
| netdevice.h | ||
| poison.h | ||
| posix_types.h | ||
| printk.h | ||
| psci.h | ||
| rbtree.h | ||
| rbtree_augmented.h | ||
| screen_info.h | ||
| serial_reg.h | ||
| sizes.h | ||
| stat.h | ||
| stddef.h | ||
| string.h | ||
| stringify.h | ||
| time.h | ||
| typecheck.h | ||
| types.h | ||