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 Common Properties 8 9 maintainers: 10 - Miquel Raynal <miquel.raynal@bootlin.com> 11 12 allOf: 13 - $ref: mtd.yaml# 14 15 description: | 16 This file covers the generic description of a NAND chip. It implies that the 17 bus interface should not be taken into account: both raw NAND devices and 18 SPI-NAND devices are concerned by this description. 19 20 properties: 21 reg: 22 description: 23 Contains the chip-select IDs. 24 25 nand-ecc-engine: 26 description: | 27 A phandle on the hardware ECC engine if any. There are 28 basically three possibilities: 29 1/ The ECC engine is part of the NAND controller, in this 30 case the phandle should reference the parent node. 31 2/ The ECC engine is part of the NAND part (on-die), in this 32 case the phandle should reference the node itself. 33 3/ The ECC engine is external, in this case the phandle should 34 reference the specific ECC engine node. 35 $ref: /schemas/types.yaml#/definitions/phandle 36 37 nand-use-soft-ecc-engine: 38 description: Use a software ECC engine. 39 type: boolean 40 41 nand-no-ecc-engine: 42 description: Do not use any ECC correction. 43 type: boolean 44 45 nand-ecc-algo: 46 description: 47 Desired ECC algorithm. 48 $ref: /schemas/types.yaml#/definitions/string 49 enum: [hamming, bch, rs] 50 51 nand-ecc-strength: 52 description: 53 Maximum number of bits that can be corrected per ECC step. 54 $ref: /schemas/types.yaml#/definitions/uint32 55 minimum: 1 56 57 nand-ecc-step-size: 58 description: 59 Number of data bytes covered by a single ECC step. 60 $ref: /schemas/types.yaml#/definitions/uint32 61 minimum: 1 62 63 secure-regions: 64 description: 65 Regions in the NAND chip which are protected using a secure element 66 like Trustzone. This property contains the start address and size of 67 the secure regions present. 68 $ref: /schemas/types.yaml#/definitions/uint64-matrix 69 70 required: 71 - reg 72 73 # This file can be referenced by more specific devices (like spi-nands) 74 additionalProperties: true
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