linux-dev/drivers/mtd/nand/Kconfig, branch master

mtd: nand: MTD_NAND_ECC_MEDIATEK should depend on ARCH_MEDIATEK

2022-05-12T14:43:04Z

The MediaTek Hardware ECC Engine is only present on MediaTek MT27xx and MT76xx SoCs. The driver for this engine is a dependency for the MediaTek NAND controller (MTD_NAND_MTK) and the MediaTek SPI NAND Flash Interface (SPI_MTK_SNFI) drivers, both of which already depend on ARCH_MEDIATEK. Hence add a dependency on ARCH_MEDIATEK to the Hardware ECC Engine driver, too, to prevent asking the user about this driver when configuring a kernel without MediaTek SoC support. Fixes: 4fd62f15afa0d0da ("mtd: nand: make mtk_ecc.c a separated module") Signed-off-by: Geert Uytterhoeven Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/bb9568e825d4bc7506870b03836baa91bcc4b725.1652104136.git.geert+renesas@glider.be

mtd: nand: make mtk_ecc.c a separated module

2022-04-27T16:12:35Z

this code will be used in mediatek snfi spi-mem controller with pipelined ECC engine. Signed-off-by: Chuanhong Guo Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20220424032527.673605-2-gch981213@gmail.com

mtd: nand: ecc: mxic: Fix compile test issue

2022-03-14T16:05:35Z

Avoid random build errors with architectures which do not select HAS_IOMEM by depending on it in Kconfig. This fixes the following warning: /home/mraynal/0day/gcc-11.2.0-nolibc/s390-linux/bin/s390-linux-ld: drivers/mtd/nand/ecc-mxic.o: in function `mxic_ecc_probe': ecc-mxic.c:(.text+0x2244): undefined reference to `devm_platform_ioremap_resource' Reported-by: kernel test robot Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20220314152336.75447-1-miquel.raynal@bootlin.com

mtd: nand: mxic-ecc: Add Macronix external ECC engine support

2022-02-09T08:49:25Z

Some SPI-NAND chips do not support on-die ECC. For these chips, correction must apply on the SPI controller end. In order to avoid doing all the calculations by software, Macronix provides a specific engine that can offload the intensive work. Add Macronix ECC engine support, this engine can work in conjunction with a SPI controller and a raw NAND controller, it can be pipelined or external and supports linear and syndrome layouts. Right now the simplest configuration is supported: SPI controller external and linear ECC engine. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20211216111654.238086-15-miquel.raynal@bootlin.com

mtd: nand: Change dependency between the NAND and ECC cores

2020-12-10T21:37:32Z

The NAND ECC core is included in the generic NAND core when it is compiled in. Different software ECC engines drivers will select the NAND ECC core and thus also have a dependency on the NAND core. Using a "depends on" between the two leads to possible cases (not real cases, but created by robots) where one is still unselected because of the "select does not verifies depends on" game: WARNING: unmet direct dependencies detected for MTD_NAND_ECC Depends on [n]: MTD [=m] && MTD_NAND_CORE [=n] Selected by [m]: - MTD_NAND_ECC_SW_HAMMING [=y] && MTD [=m] - MTD_NAND_ECC_SW_BCH [=y] && MTD [=m] Fix this by using a select instead. Reported-by: Randy Dunlap Signed-off-by: Miquel Raynal Acked-by: Randy Dunlap # build-tested Link: https://lore.kernel.org/linux-mtd/20201113123945.32592-1-miquel.raynal@bootlin.com

mtd: nand: ecc-hamming: Let the software Hamming ECC engine be unselected

2020-12-10T21:37:30Z

There is no reason to always embed the software Hamming ECC engine implementation. By default it is (with raw NAND), but we can let the user decide. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-19-miquel.raynal@bootlin.com

mtd: nand: ecc-hamming: Move Hamming code to the generic NAND layer

2020-12-10T21:37:29Z

Hamming ECC code might be later re-used by the SPI NAND layer. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-12-miquel.raynal@bootlin.com

mtd: nand: ecc-bch: Move BCH code to the generic NAND layer

2020-11-30T08:27:32Z

BCH ECC code might be later re-used by the SPI NAND layer. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200929230124.31491-3-miquel.raynal@bootlin.com

mtd: nand: Introduce the ECC engine framework

2020-09-02T07:28:15Z

Create a generic ECC engine framework. This is a base to instantiate ECC engine objects. If we really want to be generic, bindings must evolve, so here is the new logic. The following three properties are mutually exclusive: - The nand-no-ecc-engine boolean property is set and there is no ECC engine to retrieve. - The nand-use-soft-ecc-engine boolean property is set and the core will force using the use of software correction. - There is a nand-ecc-engine property pointing at a node which will act as ECC engine. It the later case, the property may reference: - The NAND chip node itself (for the on-die ECC case). - The parent node if the NAND controller embeds an ECC engine. - Any other node being an external ECC controller as well. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200827085208.16276-9-miquel.raynal@bootlin.com

mtd: nand: Add an extra level in the Kconfig hierarchy

2020-06-26T06:35:03Z

Use an extra level in Kconfig for all NAND related entries. Signed-off-by: Miquel Raynal Reviewed-by: Boris Brezillon Link: https://lore.kernel.org/linux-mtd/20200529002517.3546-11-miquel.raynal@bootlin.com