ahci-platform.txt

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

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