| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/mtd/gpmi-nand.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Freescale General-Purpose Media Interface (GPMI) |
| 8 | |
| 9 | maintainers: |
| 10 | - Han Xu <han.xu@nxp.com> |
| 11 | |
| 12 | description: | |
| 13 | The GPMI nand controller provides an interface to control the NAND |
| 14 | flash chips. The device tree may optionally contain sub-nodes |
| 15 | describing partitions of the address space. See partition.txt for |
| 16 | more detail. |
| 17 | |
| 18 | properties: |
| 19 | compatible: |
| 20 | oneOf: |
| 21 | - enum: |
| 22 | - fsl,imx23-gpmi-nand |
| 23 | - fsl,imx28-gpmi-nand |
| 24 | - fsl,imx6q-gpmi-nand |
| 25 | - fsl,imx6sx-gpmi-nand |
| 26 | - fsl,imx7d-gpmi-nand |
| 27 | - items: |
| 28 | - enum: |
| 29 | - fsl,imx8mm-gpmi-nand |
| 30 | - fsl,imx8mn-gpmi-nand |
| 31 | - const: fsl,imx7d-gpmi-nand |
| 32 | |
| 33 | reg: |
| 34 | items: |
| 35 | - description: Address and length of gpmi block. |
| 36 | - description: Address and length of bch block. |
| 37 | |
| 38 | reg-names: |
| 39 | items: |
| 40 | - const: gpmi-nand |
| 41 | - const: bch |
| 42 | |
| 43 | interrupts: |
| 44 | maxItems: 1 |
| 45 | |
| 46 | interrupt-names: |
| 47 | const: bch |
| 48 | |
| 49 | dmas: |
| 50 | maxItems: 1 |
| 51 | |
| 52 | dma-names: |
| 53 | const: rx-tx |
| 54 | |
| 55 | clocks: |
| 56 | minItems: 1 |
| 57 | maxItems: 5 |
| 58 | |
| 59 | clock-names: |
| 60 | minItems: 1 |
| 61 | maxItems: 5 |
| 62 | |
| 63 | fsl,use-minimum-ecc: |
| 64 | type: boolean |
| 65 | description: | |
| 66 | Protect this NAND flash with the minimum ECC strength required. |
| 67 | The required ECC strength is automatically discoverable for some |
| 68 | flash (e.g., according to the ONFI standard). However, note that |
| 69 | if this strength is not discoverable or this property is not enabled, |
| 70 | the software may chooses an implementation-defined ECC scheme. |
| 71 | |
| 72 | fsl,no-blockmark-swap: |
| 73 | type: boolean |
| 74 | description: | |
| 75 | Don't swap the bad block marker from the OOB area with the byte in |
| 76 | the data area but rely on the flash based BBT for identifying bad blocks. |
| 77 | NOTE: this is only valid in conjunction with 'nand-on-flash-bbt'. |
| 78 | WARNING: on i.MX28 blockmark swapping cannot be disabled for the BootROM |
| 79 | in the FCB. Thus, partitions written from Linux with this feature turned |
| 80 | on may not be accessible by the BootROM code. |
| 81 | |
| 82 | required: |
| 83 | - compatible |
| 84 | - reg |
| 85 | - reg-names |
| 86 | - interrupts |
| 87 | - interrupt-names |
| 88 | - clocks |
| 89 | - clock-names |
| 90 | - dmas |
| 91 | - dma-names |
| 92 | |
| 93 | unevaluatedProperties: false |
| 94 | |
| 95 | allOf: |
| 96 | - $ref: nand-controller.yaml |
| 97 | |
| 98 | - if: |
| 99 | properties: |
| 100 | compatible: |
| 101 | contains: |
| 102 | enum: |
| 103 | - fsl,imx23-gpmi-nand |
| 104 | - fsl,imx28-gpmi-nand |
| 105 | then: |
| 106 | properties: |
| 107 | clocks: |
| 108 | items: |
| 109 | - description: SoC gpmi io clock |
| 110 | clock-names: |
| 111 | items: |
| 112 | - const: gpmi_io |
| 113 | |
| 114 | - if: |
| 115 | properties: |
| 116 | compatible: |
| 117 | contains: |
| 118 | enum: |
| 119 | - fsl,imx6q-gpmi-nand |
| 120 | - fsl,imx6sx-gpmi-nand |
| 121 | then: |
| 122 | properties: |
| 123 | clocks: |
| 124 | items: |
| 125 | - description: SoC gpmi io clock |
| 126 | - description: SoC gpmi apb clock |
| 127 | - description: SoC gpmi bch clock |
| 128 | - description: SoC gpmi bch apb clock |
| 129 | - description: SoC per1 bch clock |
| 130 | clock-names: |
| 131 | items: |
| 132 | - const: gpmi_io |
| 133 | - const: gpmi_apb |
| 134 | - const: gpmi_bch |
| 135 | - const: gpmi_bch_apb |
| 136 | - const: per1_bch |
| 137 | |
| 138 | - if: |
| 139 | properties: |
| 140 | compatible: |
| 141 | contains: |
| 142 | const: fsl,imx7d-gpmi-nand |
| 143 | then: |
| 144 | properties: |
| 145 | clocks: |
| 146 | items: |
| 147 | - description: SoC gpmi io clock |
| 148 | - description: SoC gpmi bch apb clock |
| 149 | clock-names: |
| 150 | items: |
| 151 | - const: gpmi_io |
| 152 | - const: gpmi_bch_apb |
| 153 | |
| 154 | examples: |
| 155 | - | |
| 156 | nand-controller@8000c000 { |
| 157 | #address-cells = <1>; |
| 158 | #size-cells = <0>; |
| 159 | compatible = "fsl,imx28-gpmi-nand"; |
| 160 | reg = <0x8000c000 0x2000>, <0x8000a000 0x2000>; |
| 161 | reg-names = "gpmi-nand", "bch"; |
| 162 | interrupts = <41>; |
| 163 | interrupt-names = "bch"; |
| 164 | clocks = <&clks 50>; |
| 165 | clock-names = "gpmi_io"; |
| 166 | dmas = <&dma_apbh 4>; |
| 167 | dma-names = "rx-tx"; |
| 168 | }; |