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.