Merge tag 'mtd/for-4.18' of git://git.infradead.org/linux-mtd

Pull MTD updates from Boris Brezillon:
 "Core changes:
   - Add a sysfs attribute to expose available OOB size

  Driver changes:
   - Remove HAS_DMA dependency on various drivers
   - Use dev_get_drvdata() instead of platform_get_drvdata() in docg3
   - Replace msleep by usleep_range() in the dataflash driver
   - Avoid VLA usage in nftl layers
   - Remove useless .owner assignment in pismo
   - Fix various issues in the CFI driver
   - Improve TRX partition handling expose a DT compat for this part
     parser
   - Clarify OFFSET_CONTINUOUS meaning

  NAND core changes:
   - Add Miquel as a NAND maintainer
   - Add access mode to the nand_page_io_req struct
   - Fix kernel-doc in rawnand.h
   - Support bit-wise majority to recover from corrupted ONFI parameter
     pages
   - Stop checking FAIL bit after a SET_FEATURES, as documented in the
     ONFI spec

  Raw NAND Driver changes:
   - Fix and cleanup the error path of many NAND controller drivers
   - GPMI:
      + Cleanup/simplification of a few aspects in the driver
      + Take ECC setup specified in the DT into account
   - sunxi: remove support for GPIO-based R/B polling
   - MTK:
      + Use of_device_get_match_data() instead of of_match_device()
      + Add an entry in MAINTAINERS for this driver
      + Fix nand-ecc-step-size and nand-ecc-strength description in the
        DT bindings doc
   - fsl_ifc: fix ->cmdfunc() to read more than one ONFI parameter page

  OneNAND driver changes:
   - samsung: use dev_get_drvdata() instead of platform_get_drvdata()

  SPI NOR core changes:
   - Add support for a bunch of SPI NOR chips
   - Clear EAR reg when switching to 3-byte addressing mode on Winbond
     chips

  SPI NOR controller driver changes:
   - cadence: Add DMA support for direct mode reads
   - hisi: Prefix a few functions with hisi_
   - intel:
      + Mark the driver as "dangerous" in Kconfig
      + Fix atomic sequence handling
      + Pass a 40us delay (instead of 0us) to readl_poll_timeout()
   - fsl:
      + fix a typo in a function name
      + add support for IP variants embedded in the ls2080a and ls1080a
        SoCs
   - stm32: request exclusive control of the reset line"

* tag 'mtd/for-4.18' of git://git.infradead.org/linux-mtd: (66 commits)
  mtd: nand: Pass mode information to nand_page_io_req
  mtd: cfi_cmdset_0002: Change erase one block to enable XIP once
  mtd: cfi_cmdset_0002: Change erase functions to check chip good only
  mtd: cfi_cmdset_0002: Change erase functions to retry for error
  mtd: cfi_cmdset_0002: Change definition naming to retry write operation
  mtd: cfi_cmdset_0002: Change write buffer to check correct value
  mtd: cmdlinepart: Update comment for introduction of OFFSET_CONTINUOUS
  mtd: bcm47xxpart: add of_match_table with a new DT binding
  dt-bindings: mtd: document Broadcom's BCM47xx partitions
  mtd: spi-nor: Add support for EN25QH32
  mtd: spi-nor: Add support for is25wp series chips
  mtd: spi-nor: Add Winbond w25q32jv support
  mtd: spi-nor: fsl-quadspi: add support for ls2080a/ls1080a
  mtd: spi-nor: stm32-quadspi: explicitly request exclusive reset control
  mtd: spi-nor: intel: provide a range for poll_timout
  mtd: spi-nor: fsl-quadspi: fix api naming typo _init_ahb_read
  mtd: spi-nor: intel-spi: Explicitly mark the driver as dangerous in Kconfig
  mtd: spi-nor: intel-spi: Fix atomic sequence handling
  mtd: rawnand: Do not check FAIL bit when executing a SET_FEATURES op
  mtd: rawnand: use bit-wise majority to recover the ONFI param page
  ...

1 files changed, 19 insertions, 5 deletions

diff --git a/Documentation/devicetree/bindings/mtd/mtk-nand.txt b/Documentation/devicetree/bindings/mtd/mtk-nand.txt
index c5ba6a4ba1f2..4d3ec5e4ff8a 100644
--- a/Documentation/devicetree/bindings/mtd/mtk-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/mtk-nand.txt
@@ -48,14 +48,19 @@ Optional:
 - nand-on-flash-bbt:	Store BBT on NAND Flash.
 - nand-ecc-mode:	the NAND ecc mode (check driver for supported modes)
 - nand-ecc-step-size:	Number of data bytes covered by a single ECC step.
-			valid values: 512 and 1024.
+			valid values:
+			512 and 1024 on mt2701 and mt2712.
+			512 only on mt7622.
 			1024 is recommended for large page NANDs.
 - nand-ecc-strength:	Number of bits to correct per ECC step.
-			The valid values that the controller supports are: 4, 6,
-			8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36, 40, 44,
-			48, 52, 56, 60.
+			The valid values that each controller supports:
+			mt2701: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28,
+				32, 36, 40, 44, 48, 52, 56, 60.
+			mt2712: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28,
+				32, 36, 40, 44, 48, 52, 56, 60, 68, 72, 80.
+			mt7622: 4, 6, 8, 10, 12, 14, 16.
 			The strength should be calculated as follows:
-			E = (S - F) * 8 / 14
+			E = (S - F) * 8 / B
 			S = O / (P / Q)
 				E :	nand-ecc-strength.
 				S :	spare size per sector.
@@ -64,6 +69,15 @@ Optional:
 				O :	oob size.
 				P :	page size.
 				Q :	nand-ecc-step-size.
+				B :	number of parity bits needed to correct
+					1 bitflip.
+					According to MTK NAND controller design,
+					this number depends on max ecc step size
+					that MTK NAND controller supports.
+					If max ecc step size supported is 1024,
+					then it should be always 14. And if max
+					ecc step size is 512, then it should be
+					always 13.
 			If the result does not match any one of the listed
 			choices above, please select the smaller valid value from
 			the list.