nand-chip.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/mtd/nand-chip.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: NAND Chip and NAND Controller Generic Binding
    8 
    9 maintainers:
   10   - Miquel Raynal <miquel.raynal@bootlin.com>
   11 
   12 description: |
   13   This file covers the generic description of a NAND chip. It implies that the
   14   bus interface should not be taken into account: both raw NAND devices and
   15   SPI-NAND devices are concerned by this description.
   16 
   17 properties:
   18   reg:
   19     description:
   20       Contains the chip-select IDs.
   21 
   22   nand-ecc-engine:
   23     description: |
   24       A phandle on the hardware ECC engine if any. There are
   25       basically three possibilities:
   26       1/ The ECC engine is part of the NAND controller, in this
   27       case the phandle should reference the parent node.
   28       2/ The ECC engine is part of the NAND part (on-die), in this
   29       case the phandle should reference the node itself.
   30       3/ The ECC engine is external, in this case the phandle should
   31       reference the specific ECC engine node.
   32     $ref: /schemas/types.yaml#/definitions/phandle
   33 
   34   nand-use-soft-ecc-engine:
   35     description: Use a software ECC engine.
   36     type: boolean
   37 
   38   nand-no-ecc-engine:
   39     description: Do not use any ECC correction.
   40     type: boolean
   41 
   42   nand-ecc-algo:
   43     description:
   44       Desired ECC algorithm.
   45     $ref: /schemas/types.yaml#/definitions/string
   46     enum: [hamming, bch, rs]
   47 
   48   nand-ecc-strength:
   49     description:
   50       Maximum number of bits that can be corrected per ECC step.
   51     $ref: /schemas/types.yaml#/definitions/uint32
   52     minimum: 1
   53 
   54   nand-ecc-step-size:
   55     description:
   56       Number of data bytes covered by a single ECC step.
   57     $ref: /schemas/types.yaml#/definitions/uint32
   58     minimum: 1
   59 
   60   secure-regions:
   61     description:
   62       Regions in the NAND chip which are protected using a secure element
   63       like Trustzone. This property contains the start address and size of
   64       the secure regions present.
   65     $ref: /schemas/types.yaml#/definitions/uint64-matrix
   66 
   67 required:
   68   - reg
   69 
   70 additionalProperties: true

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