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"
28 depends on PTP_1588_CLOCK
31 This driver adds support for using the eTSEC as a PTP
32 clock. This clock is only useful if your PTP programs are
33 getting hardware time stamps on the PTP Ethernet packets
34 using the SO_TIMESTAMPING API.
36 To compile this driver as a module, choose M here: the module
37 will be called gianfar_ptp.
39 config PTP_1588_CLOCK_IXP46X
40 tristate "Intel IXP46x as PTP clock"
41 depends on PTP_1588_CLOCK
44 This driver adds support for using the IXP46X as a PTP
45 clock. This clock is only useful if your PTP programs are
46 getting hardware time stamps on the PTP Ethernet packets
47 using the SO_TIMESTAMPING API.
49 To compile this driver as a module, choose M here: the module
50 will be called ptp_ixp46x.
52 comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks."
53 depends on PTP_1588_CLOCK && (PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n)
56 tristate "Driver for the National Semiconductor DP83640 PHYTER"
57 depends on PTP_1588_CLOCK
58 depends on NETWORK_PHY_TIMESTAMPING
61 Supports the DP83640 PHYTER with IEEE 1588 features.
63 This driver adds support for using the DP83640 as a PTP
64 clock. This clock is only useful if your PTP programs are
65 getting hardware time stamps on the PTP Ethernet packets
66 using the SO_TIMESTAMPING API.
68 In order for this to work, your MAC driver must also
69 implement the skb_tx_timestamp() function.
71 config PTP_1588_CLOCK_PCH
72 tristate "Intel PCH EG20T as PTP clock"
73 depends on PTP_1588_CLOCK
76 This driver adds support for using the PCH EG20T as a PTP
77 clock. The hardware supports time stamping of PTP packets
78 when using the end-to-end delay (E2E) mechansim. The peer
79 delay mechansim (P2P) is not supported.
81 This clock is only useful if your PTP programs are getting
82 hardware time stamps on the PTP Ethernet packets using the
85 To compile this driver as a module, choose M here: the module
86 will be called ptp_pch.