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Diffstat (limited to 'Documentation/devicetree/bindings/ata/ahci-platform.txt')
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diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt new file mode 100644 index 000000000..77091a277 --- /dev/null +++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt @@ -0,0 +1,79 @@ +* 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: + - "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,spear-ahci" + - "generic-ahci" +- interrupts : <interrupt mapping for SATA IRQ> +- reg : <registers mapping> + +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 +- resets : a list of phandle + reset specifier pairs +- target-supply : regulator for SATA target power +- phy-supply : regulator for PHY power +- phys : reference to the SATA PHY node +- phy-names : must be "sata-phy" +- ahci-supply : regulator for AHCI controller +- 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>; + }; + +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 = <®_sata0>; + }; + + sata1: sata-port@1 { + reg = <1>; + phys = <&sata_phy 1>; + target-supply = <®_sata1>;; + }; + }; |