1 * Microsemi - vsc8531 Giga bit ethernet phy
2
3 Optional properties:
4 - vsc8531,vddmac : The vddmac in mV. Al
5 in the first row of
6 This property is onl
7 with the 'edge-slowd
8 Default value is 330
9 - vsc8531,edge-slowdown : % the edge should be
10 the fastest possible
11 Edge rate sets the d
12 interface output sig
13 drive strength will
14 the output signal.
15 is to help reduce el
16 by being able to rep
17 and in effect slow d
18 desired.
19 To adjust the edge-s
20 must be specified. T
21 supported edge-slowd
22 'vddmac'.
23 Default value is 0%.
24 Ref: Table:1 - Edge
25 - vsc8531,led-[N]-mode : LED mode. Specify ho
26 N depends on the num
27 PHY.
28 Allowed values are d
29 "include/dt-bindings
30 Default values are V
31 VSC8531_LINK_100_ACT
32 VSC8531_LINK_ACTIVIT
33 VSC8531_DUPLEX_COLLI
34 - load-save-gpios : GPIO used for the lo
35 hardware clock (PHC)
36
37
38 Table: 1 - Edge rate change
39 ----------------------------------------------
40 | Edge Rate Change (VDDMAC)
41 |
42 | 3300 mV 2500 mV 1800 mV
43 |---------------------------------------------
44 | 0% 0% 0%
45 | (Fastest) (recommended)
46 |---------------------------------------------
47 | 2% 3% 5%
48 |---------------------------------------------
49 | 4% 6% 9%
50 |---------------------------------------------
51 | 7% 10% 16%
52 |(recommended) (recommended)
53 |---------------------------------------------
54 | 10% 14% 23%
55 |---------------------------------------------
56 | 17% 23% 35%
57 |---------------------------------------------
58 | 29% 37% 52%
59 |---------------------------------------------
60 | 53% 63% 76%
61 | (slowest)
62 |---------------------------------------------
63
64 Example:
65
66 vsc8531_0: ethernet-phy@0 {
67 compatible = "ethernet-phy-id0
68 vsc8531,vddmac = <330
69 vsc8531,edge-slowdown = <7>;
70 vsc8531,led-0-mode = <VSC
71 vsc8531,led-1-mode = <VSC
72 load-save-gpios = <&gp
73 };
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