Documentation/devicetree/bindings/mtd/ingenic,nand.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/mtd/ingenic,nand.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Ingenic SoCs NAND controller devicetree bindings
   8
   9 maintainers:
  10   - Paul Cercueil <paul@crapouillou.net>
  11
  12 allOf:
  13   - $ref: nand-controller.yaml#
  14   - $ref: /schemas/memory-controllers/ingenic,nemc-peripherals.yaml#
  15
  16 properties:
  17   compatible:
  18     enum:
  19       - ingenic,jz4740-nand
  20       - ingenic,jz4725b-nand
  21       - ingenic,jz4780-nand
  22
  23   reg:
  24     items:
  25       - description: Bank number, offset and size of first attached NAND chip
  26       - description: Bank number, offset and size of second attached NAND chip
  27       - description: Bank number, offset and size of third attached NAND chip
  28       - description: Bank number, offset and size of fourth attached NAND chip
  29     minItems: 1
  30
  31   ecc-engine: true
  32
  33   partitions:
  34     type: object
  35     description:
  36       Node containing description of fixed partitions.
  37       See Documentation/devicetree/bindings/mtd/partition.txt
  38
  39 patternProperties:
  40   "^nand@[a-f0-9]$":
  41     type: object
  42     properties:
  43       rb-gpios:
  44         description: GPIO specifier for the busy pin.
  45         maxItems: 1
  46
  47       wp-gpios:
  48         description: GPIO specifier for the write-protect pin.
  49         maxItems: 1
  50
  51 required:
  52   - compatible
  53   - reg
  54
  55 unevaluatedProperties: false
  56
  57 examples:
  58   - |
  59     #include <dt-bindings/clock/ingenic,jz4780-cgu.h>
  60     memory-controller@13410000 {
  61       compatible = "ingenic,jz4780-nemc";
  62       reg = <0x13410000 0x10000>;
  63       #address-cells = <2>;
  64       #size-cells = <1>;
  65       ranges = <1 0 0x1b000000 0x1000000>,
  66          <2 0 0x1a000000 0x1000000>,
  67          <3 0 0x19000000 0x1000000>,
  68          <4 0 0x18000000 0x1000000>,
  69          <5 0 0x17000000 0x1000000>,
  70          <6 0 0x16000000 0x1000000>;
  71
  72       clocks = <&cgu JZ4780_CLK_NEMC>;
  73
  74       nand-controller@1 {
  75         compatible = "ingenic,jz4780-nand";
  76         reg = <1 0 0x1000000>;
  77
  78         #address-cells = <1>;
  79         #size-cells = <0>;
  80
  81         ecc-engine = <&bch>;
  82
  83         ingenic,nemc-tAS = <10>;
  84         ingenic,nemc-tAH = <5>;
  85         ingenic,nemc-tBP = <10>;
  86         ingenic,nemc-tAW = <15>;
  87         ingenic,nemc-tSTRV = <100>;
  88
  89         pinctrl-names = "default";
  90         pinctrl-0 = <&pins_nemc>;
  91
  92         nand@1 {
  93           reg = <1>;
  94
  95           nand-ecc-step-size = <1024>;
  96           nand-ecc-strength = <24>;
  97           nand-ecc-mode = "hw";
  98           nand-on-flash-bbt;
  99
 100           pinctrl-names = "default";
 101           pinctrl-0 = <&pins_nemc_cs1>;
 102
 103           partitions {
 104             compatible = "fixed-partitions";
 105             #address-cells = <2>;
 106             #size-cells = <2>;
 107
 108             partition@0 {
 109               label = "u-boot-spl";
 110               reg = <0x0 0x0 0x0 0x800000>;
 111             };
 112
 113             partition@800000 {
 114               label = "u-boot";
 115               reg = <0x0 0x800000 0x0 0x200000>;
 116             };
 117
 118             partition@a00000 {
 119               label = "u-boot-env";
 120               reg = <0x0 0xa00000 0x0 0x200000>;
 121             };
 122
 123             partition@c00000 {
 124               label = "boot";
 125               reg = <0x0 0xc00000 0x0 0x4000000>;
 126             };
 127
 128             partition@4c00000 {
 129               label = "system";
 130               reg = <0x0 0x4c00000 0x1 0xfb400000>;
 131             };
 132           };
 133         };
 134       };
 135     };