kernel.git/Documentation/devicetree/bindings/mtd, branch linux-4.4.y

dt-bindings: mtd: gpmc: Fix the ECC bytes vs. OOB bytes equation

2021-09-22T09:41:27Z

[ Upstream commit 778cb8e39f6ec252be50fc3850d66f3dcbd5dd5a ] "PAGESIZE / 512" is the number of ECC chunks. "ECC_BYTES" is the number of bytes needed to store a single ECC code. "2" is the space reserved by the bad block marker. "2 + (PAGESIZE / 512) * ECC_BYTES" should of course be lower or equal than the total number of OOB bytes, otherwise it won't fit. Fix the equation by substituting s/>=/<=/. Suggested-by: Ryan J. Barnett Signed-off-by: Miquel Raynal Acked-by: Rob Herring Link: https://lore.kernel.org/linux-mtd/20210610143945.3504781-1-miquel.raynal@bootlin.com Signed-off-by: Sasha Levin

doc: dt: mtd: partitions: add compatible property to "partitions" node

2015-12-09T01:10:20Z

As noted here [1], there are potentially future conflicts if we try to use MTD's "partitions" subnode to describe anything besides just the fixed-in-the-device-tree partitions currently described in this document. Particularly, there was a proposal to use this node for the AFS parser too. It can pose a (small) problem to try to differentiate the following nodes: // using binding as currently specified partitions { #address-cells = ; #size-cells = ; partition@0 { ...; }; }; and // proposed future binding partitions { compatible = "arm,arm-flash-structure"; }; It's especially difficult if other uses of this node start having subnodes. So, since the "partitions" node is new in v4.4, let's fixup the binding before release so that it requires a compatible property, so it's much clearer to distinguish. e.g.: // proposed partitions { compatible = "fixed-partitions"; #address-cells = ; #size-cells = ; partition@0 { ...; }; }; [1] Subject: "mtd: create a partition type device tree binding" http://lkml.kernel.org/g/20151113220039.GA74382@google.com http://lists.infradead.org/pipermail/linux-mtd/2015-November/063355.html http://lists.infradead.org/pipermail/linux-mtd/2015-November/063364.html Cc: Michal Suchanek Signed-off-by: Brian Norris Acked-by: Rob Herring

doc: dt: mtd: support partitions in a special 'partitions' subnode

2015-10-30T21:00:42Z

To avoid conflict with other drivers using subnodes of the mtd device create only one ofpart-specific node rather than any number of arbitrary partition subnodes. Signed-off-by: Michal Suchanek Acked-by: Rob Herring Signed-off-by: Brian Norris

mtd: fsmc_nand: Add BCH4 SW ECC support for SPEAr600

2015-10-26T20:19:40Z

This patch adds support for 4-bit ECC BCH4 for the SPEAr600 SoC. This can be used by boards equipped with a NAND chip that requires 4-bit ECC strength. The SPEAr600 HW ECC only supports 1-bit ECC strength. To enable SW BCH4, you need to specify this in your nand controller DT node: nand-ecc-mode = "soft_bch"; nand-ecc-strength = <4>; nand-ecc-step-size = <512>; Tested on a custom SPEAr600 board. Signed-off-by: Stefan Roese Cc: Linus Walleij Cc: Viresh Kumar [Brian: tweaked the comments a bit] Signed-off-by: Brian Norris

mtd: nand: vf610_nfc: add device tree bindings

2015-09-29T20:54:54Z

Signed-off-by: Bill Pringlemeir Acked-by: Shawn Guo Signed-off-by: Stefan Agner [Brian: fixup #size-cells in example] Signed-off-by: Brian Norris

Merge tag 'for-linus-20150901' of git://git.infradead.org/linux-mtd

2015-09-02T19:16:24Z

Pull MTD updates from Brian Norris: "SPI NOR: - reduce virtual address space requirements for fsl-quadspi memory map - new fsl-quadspi IP support: imx6ul-qspi and imx7d-qspi - add new NOR flash device support - add new driver for NXP SPI Flash Interface (SPIFI) - stop abusing SPI API structs for non-SPI framework - fixup DT table matching for new "jedec,spi-nor" string NAND: - brcmnand: fix big endian MIPS macro usage - denali: refactor to use devres, dev_*() printing, etc. - OMAP ELM: change the module alias to actually be usable - pxa3xx_nand: fixup a few command sequencing issues -- both new and old - race conditions in the IRQ handler status clearing - problems when a bootloader left interrupts pending - config issues when overriding the bootloader configuration - new flash device support - sunxi_nand: - optimize timing configuration by calculation, rather than fixed fail-safe values - use EDO setting from ONFI - r852: fix compiler warnings - davinci: add 4KB page support Core: - oobtest: correct debug print information" * tag 'for-linus-20150901' of git://git.infradead.org/linux-mtd: (42 commits) mtd: mtd_oobtest: Fix the address offset with vary_offset case mtd: blkdevs: fix switch-bool compilation warning mtd: spi-nor: stop (ab)using struct spi_device_id mtd: nand: add Toshiba TC58NVG0S3E to nand_ids table mtd: dataflash: Export OF module alias information nand: pxa3xx: Increase READ_ID buffer and make the size static mtd: nand: pxa3xx-nand: fix random command timeouts mtd: nand: pxa3xx_nand: fix early spurious interrupt mtd: pxa3xx_nand: add a default chunk size mtd: omap_elm: Fix module alias mtd: physmap_of: fix null pointer deference when kzalloc returns null mtd: nettel: do not ignore mtd_device_register() failure in nettel_init() mtd: denali_pci: switch to dev_err() mtd: denali_pci: refactor driver using devres API mtd: denali_pci: use module_pci_driver() macro mtd: denali: hide core part from user in Kconfig mtd: spi-nor: add Spansion S25FL204K support mtd: spi-nor: Improve Kconfig help text for SPI_FSL_QUADSPI mtd: spi-nor: add driver for NXP SPI Flash Interface (SPIFI) doc: dt: add documentation for nxp,lpc1773-spifi ...

mtd: nand: pxa3xx: add optional dma for pxa architecture

2015-09-01T13:18:12Z

The PXA architecture provides a DMA to pump data from the nand controller to memory and the other way around. Add it to the binding description. Signed-off-by: Robert Jarzmik Signed-off-by: Rob Herring

doc: dt: add documentation for nxp,lpc1773-spifi

2015-08-14T18:22:54Z

Add device tree binding documentation for the SPI Flash Interface (SPIFI) found on NXP LPC18xx and LPC43xx devies. Signed-off-by: Joachim Eastwood Signed-off-by: Brian Norris

Documentation: fsl-quadspi: Add fsl, imx6ul-qspi compatible string

2015-08-06T17:07:42Z

new compatible string: "fsl,imx6ul-qspi". Signed-off-by: Frank Li Signed-off-by: Brian Norris

Documentation: fsl-quadspi: Add fsl, imx7d-qspi compatible string

2015-08-06T17:07:40Z

new compatible string: "fsl,imx7d-qspi" Signed-off-by: Frank Li Signed-off-by: Brian Norris