Commit | Line | Data |
---|---|---|
806700ba | 1 | Micrel KSZ9021/KSZ9031/KSZ9131 Gigabit Ethernet PHY |
4b405efb | 2 | |
2ad7b756 AL |
3 | Some boards require special tuning values, particularly when it comes |
4 | to clock delays. You can specify clock delay values in the PHY OF | |
5 | device node. Deprecated, but still supported, these properties can | |
6 | also be added to an Ethernet OF device node. | |
4b405efb HC |
7 | |
8 | Note that these settings are applied after any phy-specific fixup from | |
9 | phy_fixup_list (see phy_init_hw() from drivers/net/phy/phy_device.c), | |
10 | and therefore may overwrite them. | |
11 | ||
12 | KSZ9021: | |
13 | ||
14 | All skew control options are specified in picoseconds. The minimum | |
15 | value is 0, the maximum value is 3000, and it is incremented by 200ps | |
16 | steps. | |
17 | ||
18 | Optional properties: | |
19 | ||
20 | - rxc-skew-ps : Skew control of RXC pad | |
21 | - rxdv-skew-ps : Skew control of RX CTL pad | |
22 | - txc-skew-ps : Skew control of TXC pad | |
23 | - txen-skew-ps : Skew control of TX CTL pad | |
24 | - rxd0-skew-ps : Skew control of RX data 0 pad | |
25 | - rxd1-skew-ps : Skew control of RX data 1 pad | |
26 | - rxd2-skew-ps : Skew control of RX data 2 pad | |
27 | - rxd3-skew-ps : Skew control of RX data 3 pad | |
28 | - txd0-skew-ps : Skew control of TX data 0 pad | |
29 | - txd1-skew-ps : Skew control of TX data 1 pad | |
30 | - txd2-skew-ps : Skew control of TX data 2 pad | |
31 | - txd3-skew-ps : Skew control of TX data 3 pad | |
32 | ||
33 | KSZ9031: | |
34 | ||
35 | All skew control options are specified in picoseconds. The minimum | |
36 | value is 0, and the maximum is property-dependent. The increment | |
3d9e133f ML |
37 | step is 60ps. The default value is the neutral setting, so setting |
38 | rxc-skew-ps=<0> actually results in -900 picoseconds adjustment. | |
4b405efb HC |
39 | |
40 | Optional properties: | |
41 | ||
3d9e133f | 42 | Maximum value of 1860, default value 900: |
4b405efb HC |
43 | |
44 | - rxc-skew-ps : Skew control of RX clock pad | |
45 | - txc-skew-ps : Skew control of TX clock pad | |
46 | ||
3d9e133f | 47 | Maximum value of 900, default value 420: |
4b405efb HC |
48 | |
49 | - rxdv-skew-ps : Skew control of RX CTL pad | |
50 | - txen-skew-ps : Skew control of TX CTL pad | |
51 | - rxd0-skew-ps : Skew control of RX data 0 pad | |
52 | - rxd1-skew-ps : Skew control of RX data 1 pad | |
53 | - rxd2-skew-ps : Skew control of RX data 2 pad | |
54 | - rxd3-skew-ps : Skew control of RX data 3 pad | |
55 | - txd0-skew-ps : Skew control of TX data 0 pad | |
56 | - txd1-skew-ps : Skew control of TX data 1 pad | |
57 | - txd2-skew-ps : Skew control of TX data 2 pad | |
58 | - txd3-skew-ps : Skew control of TX data 3 pad | |
59 | ||
e1b505a6 MN |
60 | - micrel,force-master: |
61 | Boolean, force phy to master mode. Only set this option if the phy | |
62 | reference clock provided at CLK125_NDO pin is used as MAC reference | |
63 | clock because the clock jitter in slave mode is to high (errata#2). | |
64 | Attention: The link partner must be configurable as slave otherwise | |
65 | no link will be established. | |
66 | ||
806700ba YO |
67 | KSZ9131: |
68 | ||
69 | All skew control options are specified in picoseconds. The increment | |
70 | step is 100ps. Unlike KSZ9031, the values represent picoseccond delays. | |
71 | A negative value can be assigned as rxc-skew-psec = <(-100)>;. | |
72 | ||
73 | Optional properties: | |
74 | ||
75 | Range of the value -700 to 2400, default value 0: | |
76 | ||
77 | - rxc-skew-psec : Skew control of RX clock pad | |
78 | - txc-skew-psec : Skew control of TX clock pad | |
79 | ||
80 | Range of the value -700 to 800, default value 0: | |
81 | ||
82 | - rxdv-skew-psec : Skew control of RX CTL pad | |
83 | - txen-skew-psec : Skew control of TX CTL pad | |
84 | - rxd0-skew-psec : Skew control of RX data 0 pad | |
85 | - rxd1-skew-psec : Skew control of RX data 1 pad | |
86 | - rxd2-skew-psec : Skew control of RX data 2 pad | |
87 | - rxd3-skew-psec : Skew control of RX data 3 pad | |
88 | - txd0-skew-psec : Skew control of TX data 0 pad | |
89 | - txd1-skew-psec : Skew control of TX data 1 pad | |
90 | - txd2-skew-psec : Skew control of TX data 2 pad | |
91 | - txd3-skew-psec : Skew control of TX data 3 pad | |
92 | ||
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93 | Examples: |
94 | ||
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95 | mdio { |
96 | phy0: ethernet-phy@0 { | |
97 | rxc-skew-ps = <3000>; | |
98 | rxdv-skew-ps = <0>; | |
99 | txc-skew-ps = <3000>; | |
100 | txen-skew-ps = <0>; | |
101 | reg = <0>; | |
102 | }; | |
103 | }; | |
104 | ethernet@70000 { | |
4b405efb HC |
105 | phy = <&phy0>; |
106 | phy-mode = "rgmii-id"; | |
107 | }; |