1 * APM X-Gene 15Gbps Multi-purpose PHY nodes
2
3 PHY nodes are defined to describe on-chip 15Gb
4 PHY (pair of lanes) has its own node.
5
6 Required properties:
7 - compatible : Shall be "apm,xgene-
8 - reg : PHY memory resource
9 - #phy-cells : Shall be 1 as it exp
10 the mode of the PHY.
11 1 (SGMII), 2 (PCIe),
12
13 Optional properties:
14 - status : Shall be "ok" if ena
15 Default is "ok".
16 - clocks : Reference to the clo
17 - apm,tx-eye-tuning : Manual control to fi
18 bit lines from the a
19 Two set of 3-tuple s
20 supported link speed
21 127 in unit of one b
22 - apm,tx-eye-direction : Eye tuning manual co
23 data earlier than th
24 sample data later th
25 Two set of 3-tuple s
26 supported link speed
27 - apm,tx-boost-gain : Frequency boost AC (
28 gain control. Two se
29 (up to 3) supported
30 between 0 to 31 in u
31 - apm,tx-amplitude : Amplitude control. T
32 each (up to 3) suppo
33 Range is between 0 t
34 Default is 199500 uV
35 - apm,tx-pre-cursor1 : 1st pre-cursor empha
36 3-tuple setting for
37 speed on the host. R
38 uV. Default is 0.
39 - apm,tx-pre-cursor2 : 2nd pre-cursor empha
40 3-tuple setting for
41 speed on the host. R
42 Default is 0x0.
43 - apm,tx-post-cursor : Post-cursor emphasis
44 3-tuple setting for
45 between 0 to 0x1f in
46 - apm,tx-speed : Tx operating speed.
47 supported link speed
48 0 = 1-2Gbps
49 1 = 2-4Gbps (1st tu
50 2 = 4-8Gbps
51 3 = 8-15Gbps (2nd t
52 4 = 2.5-4Gbps
53 5 = 4-5Gbps
54 6 = 5-6Gbps
55 7 = 6-16Gbps (3rd t
56
57 NOTE: PHY override parameters are board specif
58
59 Example:
60 phy1: phy@1f21a000 {
61 compatible = "apm,xgen
62 reg = <0x0 0x1f21a000
63 #phy-cells = <1>;
64 };
65
66 phy2: phy@1f22a000 {
67 compatible = "apm,xgen
68 reg = <0x0 0x1f22a000
69 #phy-cells = <1>;
70 };
71
72 phy3: phy@1f23a000 {
73 compatible = "apm,xgen
74 reg = <0x0 0x1f23a000
75 #phy-cells = <1>;
76 };
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