| Roger Quadros | bff3e9b | 2022-12-20 12:21:58 +0200 | [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/ti,gpmc-nand.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Texas Instruments GPMC NAND Flash controller. |
| 8 | |
| 9 | maintainers: |
| 10 | - Tony Lindgren <tony@atomide.com> |
| 11 | - Roger Quadros <rogerq@kernel.org> |
| 12 | |
| 13 | description: |
| 14 | GPMC NAND controller/Flash is represented as a child of the |
| 15 | GPMC controller node. |
| 16 | |
| 17 | properties: |
| 18 | compatible: |
| 19 | items: |
| 20 | - enum: |
| 21 | - ti,am64-nand |
| 22 | - ti,omap2-nand |
| 23 | |
| 24 | reg: |
| 25 | maxItems: 1 |
| 26 | |
| 27 | interrupts: |
| 28 | items: |
| 29 | - description: Interrupt for fifoevent |
| 30 | - description: Interrupt for termcount |
| 31 | |
| 32 | "#address-cells": true |
| 33 | |
| 34 | "#size-cells": true |
| 35 | |
| 36 | ti,nand-ecc-opt: |
| 37 | description: Desired ECC algorithm |
| 38 | $ref: /schemas/types.yaml#/definitions/string |
| 39 | enum: [sw, ham1, bch4, bch8, bch16] |
| 40 | |
| 41 | ti,nand-xfer-type: |
| 42 | description: Data transfer method between controller and chip. |
| 43 | $ref: /schemas/types.yaml#/definitions/string |
| 44 | enum: [prefetch-polled, polled, prefetch-dma, prefetch-irq] |
| 45 | default: prefetch-polled |
| 46 | |
| 47 | ti,elm-id: |
| 48 | description: |
| 49 | phandle to the ELM (Error Location Module). |
| 50 | $ref: /schemas/types.yaml#/definitions/phandle |
| 51 | |
| 52 | nand-bus-width: |
| 53 | description: |
| 54 | Bus width to the NAND chip |
| 55 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 56 | enum: [8, 16] |
| 57 | default: 8 |
| 58 | |
| 59 | rb-gpios: |
| 60 | description: |
| 61 | GPIO connection to R/B signal from NAND chip |
| 62 | maxItems: 1 |
| 63 | |
| 64 | patternProperties: |
| 65 | "@[0-9a-f]+$": |
| 66 | $ref: "/schemas/mtd/partitions/partition.yaml" |
| 67 | |
| 68 | allOf: |
| 69 | - $ref: "/schemas/memory-controllers/ti,gpmc-child.yaml" |
| 70 | |
| 71 | required: |
| 72 | - compatible |
| 73 | - reg |
| 74 | - ti,nand-ecc-opt |
| 75 | |
| 76 | unevaluatedProperties: false |
| 77 | |
| 78 | examples: |
| 79 | - | |
| 80 | #include <dt-bindings/interrupt-controller/arm-gic.h> |
| 81 | #include <dt-bindings/gpio/gpio.h> |
| 82 | |
| 83 | gpmc: memory-controller@50000000 { |
| 84 | compatible = "ti,am3352-gpmc"; |
| 85 | dmas = <&edma 52 0>; |
| 86 | dma-names = "rxtx"; |
| 87 | clocks = <&l3s_gclk>; |
| 88 | clock-names = "fck"; |
| 89 | reg = <0x50000000 0x2000>; |
| 90 | interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>; |
| 91 | gpmc,num-cs = <7>; |
| 92 | gpmc,num-waitpins = <2>; |
| 93 | #address-cells = <2>; |
| 94 | #size-cells = <1>; |
| 95 | interrupt-controller; |
| 96 | #interrupt-cells = <2>; |
| 97 | gpio-controller; |
| 98 | #gpio-cells = <2>; |
| 99 | |
| 100 | ranges = <0 0 0x08000000 0x01000000>; /* CS0 space. Min partition = 16MB */ |
| 101 | nand@0,0 { |
| 102 | compatible = "ti,omap2-nand"; |
| 103 | reg = <0 0 4>; /* device IO registers */ |
| 104 | interrupt-parent = <&gpmc>; |
| 105 | interrupts = <0 IRQ_TYPE_NONE>, /* fifoevent */ |
| 106 | <1 IRQ_TYPE_NONE>; /* termcount */ |
| 107 | ti,nand-xfer-type = "prefetch-dma"; |
| 108 | ti,nand-ecc-opt = "bch16"; |
| 109 | ti,elm-id = <&elm>; |
| 110 | #address-cells = <1>; |
| 111 | #size-cells = <1>; |
| 112 | |
| 113 | /* NAND generic properties */ |
| 114 | nand-bus-width = <8>; |
| 115 | rb-gpios = <&gpmc 0 GPIO_ACTIVE_HIGH>; /* gpmc_wait0 */ |
| 116 | |
| 117 | /* GPMC properties*/ |
| 118 | gpmc,device-width = <1>; |
| 119 | |
| 120 | partition@0 { |
| 121 | label = "NAND.SPL"; |
| 122 | reg = <0x00000000 0x00040000>; |
| 123 | }; |
| 124 | partition@1 { |
| 125 | label = "NAND.SPL.backup1"; |
| 126 | reg = <0x00040000 0x00040000>; |
| 127 | }; |
| 128 | }; |
| 129 | }; |