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   - "cavium,octeon-7130-ahci"
  15   - "ibm,476gtr-ahci"
  16   - "marvell,armada-380-ahci"
  17   - "marvell,armada-3700-ahci"
  18   - "snps,dwc-ahci"
  19   - "snps,exynos5440-ahci"
  20   - "snps,spear-ahci"
  21   - "generic-ahci"
  22 - interrupts        : <interrupt mapping for SATA IRQ>
  23 - reg               : <registers mapping>
  24
  25 Please note that when using "generic-ahci" you must also specify a SoC specific
  26 compatible:
  27         compatible = "manufacturer,soc-model-ahci", "generic-ahci";
  28
  29 Optional properties:
  30 - dma-coherent      : Present if dma operations are coherent
  31 - clocks            : a list of phandle + clock specifier pairs
  32 - target-supply     : regulator for SATA target power
  33 - phys              : reference to the SATA PHY node
  34 - phy-names         : must be "sata-phy"
  35 - ports-implemented : Mask that indicates which ports that the HBA supports
  36                       are available for software to use. Useful if PORTS_IMPL
  37                       is not programmed by the BIOS, which is true with
  38                       some embedded SOC's.
  39
  40 Required properties when using sub-nodes:
  41 - #address-cells    : number of cells to encode an address
  42 - #size-cells       : number of cells representing the size of an address
  43
  44
  45 Sub-nodes required properties:
  46 - reg               : the port number
  47 And at least one of the following properties:
  48 - phys              : reference to the SATA PHY node
  49 - target-supply    : regulator for SATA target power
  50
  51 Examples:
  52         sata@ffe08000 {
  53                 compatible = "snps,spear-ahci";
  54                 reg = <0xffe08000 0x1000>;
  55                 interrupts = <115>;
  56         };
  57
  58         ahci: sata@01c18000 {
  59                 compatible = "allwinner,sun4i-a10-ahci";
  60                 reg = <0x01c18000 0x1000>;
  61                 interrupts = <56>;
  62                 clocks = <&pll6 0>, <&ahb_gates 25>;
  63                 target-supply = <&reg_ahci_5v>;
  64         };
  65
  66 With sub-nodes:
  67         sata@f7e90000 {
  68                 compatible = "marvell,berlin2q-achi", "generic-ahci";
  69                 reg = <0xe90000 0x1000>;
  70                 interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
  71                 clocks = <&chip CLKID_SATA>;
  72                 #address-cells = <1>;
  73                 #size-cells = <0>;
  74
  75                 sata0: sata-port@0 {
  76                         reg = <0>;
  77                         phys = <&sata_phy 0>;
  78                         target-supply = <&reg_sata0>;
  79                 };
  80
  81                 sata1: sata-port@1 {
  82                         reg = <1>;
  83                         phys = <&sata_phy 1>;
  84                         target-supply = <&reg_sata1>;;
  85                 };
  86         };