tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1* AHCI SATA Controller
2
3SATA nodes are defined to describe on-chip Serial ATA controllers.
4Each SATA controller should have its own node.
5
6It is possible, but not required, to represent each port as a sub-node.
7It allows to enable each port independently when dealing with multiple
8PHYs.
9
10Required properties:
11- compatible : compatible string, one of:
12 - "allwinner,sun4i-a10-ahci"
13 - "brcm,iproc-ahci"
14 - "hisilicon,hisi-ahci"
15 - "cavium,octeon-7130-ahci"
16 - "ibm,476gtr-ahci"
17 - "marvell,armada-380-ahci"
18 - "marvell,armada-3700-ahci"
19 - "snps,dwc-ahci"
20 - "snps,exynos5440-ahci"
21 - "snps,spear-ahci"
22 - "generic-ahci"
23- interrupts : <interrupt mapping for SATA IRQ>
24- reg : <registers mapping>
25
26Please note that when using "generic-ahci" you must also specify a SoC specific
27compatible:
28 compatible = "manufacturer,soc-model-ahci", "generic-ahci";
29
30Optional properties:
31- dma-coherent : Present if dma operations are coherent
32- clocks : a list of phandle + clock specifier pairs
33- target-supply : regulator for SATA target power
34- phys : reference to the SATA PHY node
35- phy-names : must be "sata-phy"
36- ports-implemented : Mask that indicates which ports that the HBA supports
37 are available for software to use. Useful if PORTS_IMPL
38 is not programmed by the BIOS, which is true with
39 some embedded SOC's.
40
41Required properties when using sub-nodes:
42- #address-cells : number of cells to encode an address
43- #size-cells : number of cells representing the size of an address
44
45
46Sub-nodes required properties:
47- reg : the port number
48And at least one of the following properties:
49- phys : reference to the SATA PHY node
50- target-supply : regulator for SATA target power
51
52Examples:
53 sata@ffe08000 {
54 compatible = "snps,spear-ahci";
55 reg = <0xffe08000 0x1000>;
56 interrupts = <115>;
57 };
58
59 ahci: sata@01c18000 {
60 compatible = "allwinner,sun4i-a10-ahci";
61 reg = <0x01c18000 0x1000>;
62 interrupts = <56>;
63 clocks = <&pll6 0>, <&ahb_gates 25>;
64 target-supply = <®_ahci_5v>;
65 };
66
67With sub-nodes:
68 sata@f7e90000 {
69 compatible = "marvell,berlin2q-achi", "generic-ahci";
70 reg = <0xe90000 0x1000>;
71 interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
72 clocks = <&chip CLKID_SATA>;
73 #address-cells = <1>;
74 #size-cells = <0>;
75
76 sata0: sata-port@0 {
77 reg = <0>;
78 phys = <&sata_phy 0>;
79 target-supply = <®_sata0>;
80 };
81
82 sata1: sata-port@1 {
83 reg = <1>;
84 phys = <&sata_phy 1>;
85 target-supply = <®_sata1>;;
86 };
87 };