2 # PTP clock support configuration
5 menu "PTP clock support"
8 tristate "PTP clock support"
11 The IEEE 1588 standard defines a method to precisely
12 synchronize distributed clocks over Ethernet networks. The
13 standard defines a Precision Time Protocol (PTP), which can
14 be used to achieve synchronization within a few dozen
15 microseconds. In addition, with the help of special hardware
16 time stamping units, it can be possible to achieve
17 synchronization to within a few hundred nanoseconds.
19 This driver adds support for PTP clocks as character
20 devices. If you want to use a PTP clock, then you should
21 also enable at least one clock driver as well.
23 To compile this driver as a module, choose M here: the module
26 config PTP_1588_CLOCK_GIANFAR
27 tristate "Freescale eTSEC as PTP clock"
32 This driver adds support for using the eTSEC as a PTP
33 clock. This clock is only useful if your PTP programs are
34 getting hardware time stamps on the PTP Ethernet packets
35 using the SO_TIMESTAMPING API.
37 To compile this driver as a module, choose M here: the module
38 will be called gianfar_ptp.
40 config PTP_1588_CLOCK_IXP46X
41 tristate "Intel IXP46x as PTP clock"
46 This driver adds support for using the IXP46X as a PTP
47 clock. This clock is only useful if your PTP programs are
48 getting hardware time stamps on the PTP Ethernet packets
49 using the SO_TIMESTAMPING API.
51 To compile this driver as a module, choose M here: the module
52 will be called ptp_ixp46x.
54 comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks."
55 depends on PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n
58 tristate "Driver for the National Semiconductor DP83640 PHYTER"
59 depends on NETWORK_PHY_TIMESTAMPING
63 Supports the DP83640 PHYTER with IEEE 1588 features.
65 This driver adds support for using the DP83640 as a PTP
66 clock. This clock is only useful if your PTP programs are
67 getting hardware time stamps on the PTP Ethernet packets
68 using the SO_TIMESTAMPING API.
70 In order for this to work, your MAC driver must also
71 implement the skb_tx_timestamp() function.
73 config PTP_1588_CLOCK_PCH
74 tristate "Intel PCH EG20T as PTP clock"
75 depends on X86 || COMPILE_TEST
78 This driver adds support for using the PCH EG20T as a PTP
79 clock. The hardware supports time stamping of PTP packets
80 when using the end-to-end delay (E2E) mechansim. The peer
81 delay mechansim (P2P) is not supported.
83 This clock is only useful if your PTP programs are getting
84 hardware time stamps on the PTP Ethernet packets using the
87 To compile this driver as a module, choose M here: the module
88 will be called ptp_pch.