2 # PTP clock support configuration
5 menu "PTP clock support"
7 comment "Enable Device Drivers -> PPS to see the PTP clock options."
11 tristate "PTP clock support"
12 depends on EXPERIMENTAL
15 The IEEE 1588 standard defines a method to precisely
16 synchronize distributed clocks over Ethernet networks. The
17 standard defines a Precision Time Protocol (PTP), which can
18 be used to achieve synchronization within a few dozen
19 microseconds. In addition, with the help of special hardware
20 time stamping units, it can be possible to achieve
21 synchronization to within a few hundred nanoseconds.
23 This driver adds support for PTP clocks as character
24 devices. If you want to use a PTP clock, then you should
25 also enable at least one clock driver as well.
27 To compile this driver as a module, choose M here: the module
30 config PTP_1588_CLOCK_GIANFAR
31 tristate "Freescale eTSEC as PTP clock"
32 depends on PTP_1588_CLOCK
35 This driver adds support for using the eTSEC as a PTP
36 clock. This clock is only useful if your PTP programs are
37 getting hardware time stamps on the PTP Ethernet packets
38 using the SO_TIMESTAMPING API.
40 To compile this driver as a module, choose M here: the module
41 will be called gianfar_ptp.
43 config PTP_1588_CLOCK_IXP46X
44 tristate "Intel IXP46x as PTP clock"
45 depends on PTP_1588_CLOCK
48 This driver adds support for using the IXP46X as a PTP
49 clock. This clock is only useful if your PTP programs are
50 getting hardware time stamps on the PTP Ethernet packets
51 using the SO_TIMESTAMPING API.
53 To compile this driver as a module, choose M here: the module
54 will be called ptp_ixp46x.
56 comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks."
57 depends on PTP_1588_CLOCK && (PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n)
60 tristate "Driver for the National Semiconductor DP83640 PHYTER"
61 depends on PTP_1588_CLOCK
62 depends on NETWORK_PHY_TIMESTAMPING
65 Supports the DP83640 PHYTER with IEEE 1588 features.
67 This driver adds support for using the DP83640 as a PTP
68 clock. This clock is only useful if your PTP programs are
69 getting hardware time stamps on the PTP Ethernet packets
70 using the SO_TIMESTAMPING API.
72 In order for this to work, your MAC driver must also
73 implement the skb_tx_timetamp() function.