Documentation/devicetree/bindings/mtd/qcom_nandc.txt

   1 * Qualcomm NAND controller
   2
   3 Required properties:
   4 - compatible:           should be "qcom,ipq806x-nand"
   5 - reg:                  MMIO address range
   6 - clocks:               must contain core clock and always on clock
   7 - clock-names:          must contain "core" for the core clock and "aon" for the
   8                         always on clock
   9 - dmas:                 DMA specifier, consisting of a phandle to the ADM DMA
  10                         controller node and the channel number to be used for
  11                         NAND. Refer to dma.txt and qcom_adm.txt for more details
  12 - dma-names:            must be "rxtx"
  13 - qcom,cmd-crci:        must contain the ADM command type CRCI block instance
  14                         number specified for the NAND controller on the given
  15                         platform
  16 - qcom,data-crci:       must contain the ADM data type CRCI block instance
  17                         number specified for the NAND controller on the given
  18                         platform
  19 - #address-cells:       <1> - subnodes give the chip-select number
  20 - #size-cells:          <0>
  21
  22 * NAND chip-select
  23
  24 Each controller may contain one or more subnodes to represent enabled
  25 chip-selects which (may) contain NAND flash chips. Their properties are as
  26 follows.
  27
  28 Required properties:
  29 - compatible:           should contain "qcom,nandcs"
  30 - reg:                  a single integer representing the chip-select
  31                         number (e.g., 0, 1, 2, etc.)
  32 - #address-cells:       see partition.txt
  33 - #size-cells:          see partition.txt
  34 - nand-ecc-strength:    see nand.txt
  35 - nand-ecc-step-size:   must be 512. see nand.txt for more details.
  36
  37 Optional properties:
  38 - nand-bus-width:       see nand.txt
  39
  40 Each nandcs device node may optionally contain a 'partitions' sub-node, which
  41 further contains sub-nodes describing the flash partition mapping. See
  42 partition.txt for more detail.
  43
  44 Example:
  45
  46 nand@1ac00000 {
  47         compatible = "qcom,ebi2-nandc";
  48         reg = <0x1ac00000 0x800>;
  49
  50         clocks = <&gcc EBI2_CLK>,
  51                  <&gcc EBI2_AON_CLK>;
  52         clock-names = "core", "aon";
  53
  54         dmas = <&adm_dma 3>;
  55         dma-names = "rxtx";
  56         qcom,cmd-crci = <15>;
  57         qcom,data-crci = <3>;
  58
  59         #address-cells = <1>;
  60         #size-cells = <0>;
  61
  62         nandcs@0 {
  63                 compatible = "qcom,nandcs";
  64                 reg = <0>;
  65
  66                 nand-ecc-strength = <4>;
  67                 nand-ecc-step-size = <512>;
  68                 nand-bus-width = <8>;
  69
  70                 partitions {
  71                         compatible = "fixed-partitions";
  72                         #address-cells = <1>;
  73                         #size-cells = <1>;
  74
  75                         partition@0 {
  76                                 label = "boot-nand";
  77                                 reg = <0 0x58a0000>;
  78                         };
  79
  80                         partition@58a0000 {
  81                                 label = "fs-nand";
  82                                 reg = <0x58a0000 0x4000000>;
  83                         };
  84                 };
  85         };
  86 };