Kernel-4.18.0-80.el8_ahci-platfor

• AHCI SATA Controller

SATA nodes are defined to describe on-chip Serial ATA controllers.
Each SATA controller should have its own node.

It is possible, but not required, to represent each port as a sub-node.
It allows to enable each port independently when dealing with multiple
PHYs.

Required properties:

• compatible : compatible string, one of:
  • “allwinner,sun4i-a10-ahci”
  • “brcm,iproc-ahci”
  • “hisilicon,hisi-ahci”
  • “cavium,octeon-7130-ahci”
  • “ibm,476gtr-ahci”
  • “marvell,armada-380-ahci”
  • “marvell,armada-3700-ahci”
  • “snps,dwc-ahci”
  • “snps,exynos5440-ahci”
  • “snps,spear-ahci”
  • “generic-ahci”
• interrupts :
• reg :

Please note that when using “generic-ahci” you must also specify a SoC specific
compatible:
compatible = “manufacturer,soc-model-ahci”, “generic-ahci”;

Optional properties:

• dma-coherent : Present if dma operations are coherent
• clocks : a list of phandle + clock specifier pairs
• target-supply : regulator for SATA target power
• phys : reference to the SATA PHY node
• phy-names : must be “sata-phy”
• ports-implemented : Mask that indicates which ports that the HBA supports

          are available for software to use. Useful if PORTS_IMPL
          is not programmed by the BIOS, which is true with
          some embedded SOC's.
  

Required properties when using sub-nodes:

• #address-cells : number of cells to encode an address
• #size-cells : number of cells representing the size of an address

Sub-nodes required properties:

• reg : the port number
  And at least one of the following properties:
• phys : reference to the SATA PHY node
• target-supply : regulator for SATA target power

Examples:
sata@ffe08000 {
compatible = “snps,spear-ahci”;
reg = <0xffe08000 0x1000>;
interrupts = <115>;
};

ahci: sata@1c18000 {
    compatible = "allwinner,sun4i-a10-ahci";
    reg = <0x01c18000 0x1000>;
    interrupts = <56>;
    clocks = <&pll6 0>, <&ahb_gates 25>;
    target-supply = <&reg_ahci_5v>;
};

With sub-nodes:
sata@f7e90000 {
compatible = “marvell,berlin2q-achi”, “generic-ahci”;
reg = <0xe90000 0x1000>;
interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&chip CLKID_SATA>;
#address-cells = <1>;
#size-cells = <0>;

    sata0: sata-port@0 {
        reg = <0>;
        phys = <&sata_phy 0>;
        target-supply = <&reg_sata0>;
    };

    sata1: sata-port@1 {
        reg = <1>;
        phys = <&sata_phy 1>;
        target-supply = <&reg_sata1>;;
    };
};