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