Documentation/devicetree/bindings/ata/ahci-platform.txt

   1 * AHCI SATA Controller
   2
   3 SATA nodes are defined to describe on-chip Serial ATA controllers.
   4 Each SATA controller should have its own node.
   5
   6 It is possible, but not required, to represent each port as a sub-node.
   7 It allows to enable each port independently when dealing with multiple
   8 PHYs.
   9
  10 Required properties:
  11 - compatible        : compatible string, one of:
  12   - "allwinner,sun4i-a10-ahci"
  13   - "hisilicon,hisi-ahci"
  14   - "ibm,476gtr-ahci"
  15   - "marvell,armada-380-ahci"
  16   - "snps,dwc-ahci"
  17   - "snps,exynos5440-ahci"
  18   - "snps,spear-ahci"
  19   - "generic-ahci"
  20 - interrupts        : <interrupt mapping for SATA IRQ>
  21 - reg               : <registers mapping>
  22
  23 Please note that when using "generic-ahci" you must also specify a SoC specific
  24 compatible:
  25         compatible = "manufacturer,soc-model-ahci", "generic-ahci";
  26
  27 Optional properties:
  28 - dma-coherent      : Present if dma operations are coherent
  29 - clocks            : a list of phandle + clock specifier pairs
  30 - target-supply     : regulator for SATA target power
  31 - phys              : reference to the SATA PHY node
  32 - phy-names         : must be "sata-phy"
  33 - ports-implemented : Mask that indicates which ports that the HBA supports
  34                       are available for software to use. Useful if PORTS_IMPL
  35                       is not programmed by the BIOS, which is true with
  36                       some embedded SOC's.
  37
  38 Required properties when using sub-nodes:
  39 - #address-cells    : number of cells to encode an address
  40 - #size-cells       : number of cells representing the size of an address
  41
  42
  43 Sub-nodes required properties:
  44 - reg               : the port number
  45 And at least one of the following properties:
  46 - phys              : reference to the SATA PHY node
  47 - target-supply    : regulator for SATA target power
  48
  49 Examples:
  50         sata@ffe08000 {
  51                 compatible = "snps,spear-ahci";
  52                 reg = <0xffe08000 0x1000>;
  53                 interrupts = <115>;
  54         };
  55
  56         ahci: sata@01c18000 {
  57                 compatible = "allwinner,sun4i-a10-ahci";
  58                 reg = <0x01c18000 0x1000>;
  59                 interrupts = <56>;
  60                 clocks = <&pll6 0>, <&ahb_gates 25>;
  61                 target-supply = <&reg_ahci_5v>;
  62         };
  63
  64 With sub-nodes:
  65         sata@f7e90000 {
  66                 compatible = "marvell,berlin2q-achi", "generic-ahci";
  67                 reg = <0xe90000 0x1000>;
  68                 interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
  69                 clocks = <&chip CLKID_SATA>;
  70                 #address-cells = <1>;
  71                 #size-cells = <0>;
  72
  73                 sata0: sata-port@0 {
  74                         reg = <0>;
  75                         phys = <&sata_phy 0>;
  76                         target-supply = <&reg_sata0>;
  77                 };
  78
  79                 sata1: sata-port@1 {
  80                         reg = <1>;
  81                         phys = <&sata_phy 1>;
  82                         target-supply = <&reg_sata1>;;
  83                 };
  84         };