Documentation/devicetree/bindings/mtd/stm32-fmc2-nand.txt

   1 STMicroelectronics Flexible Memory Controller 2 (FMC2)
   2 NAND Interface
   3
   4 Required properties:
   5 - compatible: Should be one of:
   6               * st,stm32mp15-fmc2
   7 - reg: NAND flash controller memory areas.
   8        First region contains the register location.
   9        Regions 2 to 4 respectively contain the data, command,
  10        and address space for CS0.
  11        Regions 5 to 7 contain the same areas for CS1.
  12 - interrupts: The interrupt number
  13 - pinctrl-0: Standard Pinctrl phandle (see: pinctrl/pinctrl-bindings.txt)
  14 - clocks: The clock needed by the NAND flash controller
  15
  16 Optional properties:
  17 - resets: Reference to a reset controller asserting the FMC controller
  18 - dmas: DMA specifiers (see: dma/stm32-mdma.txt)
  19 - dma-names: Must be "tx", "rx" and "ecc"
  20
  21 * NAND device bindings:
  22
  23 Required properties:
  24 - reg: describes the CS lines assigned to the NAND device.
  25
  26 Optional properties:
  27 - nand-on-flash-bbt: see nand.txt
  28 - nand-ecc-strength: see nand.txt
  29 - nand-ecc-step-size: see nand.txt
  30
  31 The following ECC strength and step size are currently supported:
  32  - nand-ecc-strength = <1>, nand-ecc-step-size = <512> (Hamming)
  33  - nand-ecc-strength = <4>, nand-ecc-step-size = <512> (BCH4)
  34  - nand-ecc-strength = <8>, nand-ecc-step-size = <512> (BCH8) (default)
  35
  36 Example:
  37
  38         fmc: nand-controller@58002000 {
  39                 compatible = "st,stm32mp15-fmc2";
  40                 reg = <0x58002000 0x1000>,
  41                       <0x80000000 0x1000>,
  42                       <0x88010000 0x1000>,
  43                       <0x88020000 0x1000>,
  44                       <0x81000000 0x1000>,
  45                       <0x89010000 0x1000>,
  46                       <0x89020000 0x1000>;
  47                 interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
  48                 clocks = <&rcc FMC_K>;
  49                 resets = <&rcc FMC_R>;
  50                 pinctrl-names = "default";
  51                 pinctrl-0 = <&fmc_pins_a>;
  52                 #address-cells = <1>;
  53                 #size-cells = <0>;
  54
  55                 nand@0 {
  56                         reg = <0>;
  57                         nand-on-flash-bbt;
  58                         #address-cells = <1>;
  59                         #size-cells = <1>;
  60                 };
  61         };