| Dinesh Maniyam | f3d0382 | 2025-02-27 00:18:15 +0800 | [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/cadence,nand.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Cadence NAND controller |
| 8 | |
| 9 | maintainers: |
| 10 | - Dinesh Maniyam <dinesh.maniyam@intel.com> |
| 11 | |
| 12 | properties: |
| 13 | compatible: |
| 14 | enum: |
| 15 | - cdns,nand |
| 16 | |
| 17 | reg-names: |
| 18 | description: | |
| 19 | There are two register regions: |
| 20 | reg: register interface |
| 21 | sdma: host data/command interface |
| 22 | items: |
| 23 | - const: reg |
| 24 | - const: sdma |
| 25 | |
| 26 | reg: |
| 27 | minItems: 2 |
| 28 | maxItems: 2 |
| 29 | |
| 30 | interrupts: |
| 31 | maxItems: 1 |
| 32 | |
| 33 | clocks: |
| 34 | description: | |
| 35 | There is one controller core clock |
| 36 | maxItems: 1 |
| 37 | |
| 38 | resets: |
| 39 | description: | |
| 40 | There are two resets: |
| 41 | controller core reset |
| 42 | combo-phy register reset |
| 43 | minItems: 1 |
| 44 | maxItems: 2 |
| 45 | |
| 46 | cdns,board-delay-ps: |
| 47 | description: | |
| 48 | Estimated Board delay. The value includes the total |
| 49 | round trip delay for the signals and is used for deciding on values |
| 50 | associated with data read capture. The example formula for SDR mode is |
| 51 | the following: |
| 52 | board delay = RE#PAD delay + PCB trace to device + PCB trace from device |
| 53 | + DQ PAD delay |
| 54 | enum: |
| 55 | - 4830 |
| 56 | |
| 57 | patternProperties: |
| 58 | "^nand@[a-f0-9]$": |
| 59 | type: object |
| 60 | properties: |
| 61 | compatible: |
| 62 | const: cdns,nand |
| 63 | |
| 64 | reg: |
| 65 | maxItems: 1 |
| 66 | |
| 67 | label: |
| 68 | maxItems: 1 |
| 69 | |
| 70 | required: |
| 71 | - compatible |
| 72 | - reg |
| 73 | - interrupts |
| 74 | - clocks |
| 75 | - cdns,board-delay-ps |
| 76 | |
| 77 | unevaluatedProperties: false |
| 78 | |
| 79 | examples: |
| 80 | - | |
| 81 | nand-controller@60000000 { |
| 82 | compatible = "cdns,nand"; |
| 83 | reg = <0x60000000 0x10000>, <0x80000000 0x1000>; |
| 84 | reg-names = "reg", "sdma"; |
| 85 | #address-cells = <1>; |
| 86 | #size-cells = <0>; |
| 87 | clocks = <&clk>; |
| 88 | cdns,board-delay-ps = <4830>; |
| 89 | interrupts = <2 0>; |
| 90 | nand@0 { |
| 91 | label = "nand-0"; |
| 92 | reg = <0>; |
| 93 | }; |
| 94 | nand@1 { |
| 95 | label = "nand-1"; |
| 96 | reg = <1>; |
| 97 | }; |
| 98 | }; |