xref: /freebsd/sys/contrib/device-tree/Bindings/phy/brcm-sata-phy.txt (revision dd41de95a84d979615a2ef11df6850622bf6184e) 
1* Broadcom SATA3 PHY
2
3Required properties:
4- compatible: should be one or more of
5     "brcm,bcm7216-sata-phy"
6     "brcm,bcm7425-sata-phy"
7     "brcm,bcm7445-sata-phy"
8     "brcm,iproc-ns2-sata-phy"
9     "brcm,iproc-nsp-sata-phy"
10     "brcm,phy-sata3"
11     "brcm,iproc-sr-sata-phy"
12     "brcm,bcm63138-sata-phy"
13- address-cells: should be 1
14- size-cells: should be 0
15- reg: register ranges for the PHY PCB interface
16- reg-names: should be "phy" and "phy-ctrl"
17     The "phy-ctrl" registers are only required for
18     "brcm,iproc-ns2-sata-phy" and "brcm,iproc-sr-sata-phy".
19
20Sub-nodes:
21  Each port's PHY should be represented as a sub-node.
22
23Sub-nodes required properties:
24- reg: the PHY number
25- phy-cells: generic PHY binding; must be 0
26
27Sub-nodes optional properties:
28- brcm,enable-ssc: use spread spectrum clocking (SSC) on this port
29     This property is not applicable for "brcm,iproc-ns2-sata-phy",
30     "brcm,iproc-nsp-sata-phy" and "brcm,iproc-sr-sata-phy".
31
32- brcm,rxaeq-mode: string that indicates the desired RX equalizer
33  mode, possible values are:
34	"off" (equivalent to not specifying the property)
35	"auto"
36	"manual" (brcm,rxaeq-value is used in that case)
37
38- brcm,rxaeq-value: when 'rxaeq-mode' is set to "manual", provides the RX
39  equalizer value that should be used. Allowed range is 0..63.
40
41Example
42	sata-phy@f0458100 {
43		compatible = "brcm,bcm7445-sata-phy", "brcm,phy-sata3";
44		reg = <0xf0458100 0x1e00>, <0xf045804c 0x10>;
45		reg-names = "phy";
46		#address-cells = <1>;
47		#size-cells = <0>;
48
49		sata-phy@0 {
50			reg = <0>;
51			#phy-cells = <0>;
52		};
53
54		sata-phy@1 {
55			reg = <1>;
56			#phy-cells = <0>;
57		};
58	};
59