1# 2# PTP clock support configuration 3# 4 5menu "PTP clock support" 6 7config PTP_1588_CLOCK 8 tristate "PTP clock support" 9 select PPS 10 help 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. 18 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. 22 23 To compile this driver as a module, choose M here: the module 24 will be called ptp. 25 26config PTP_1588_CLOCK_GIANFAR 27 tristate "Freescale eTSEC as PTP clock" 28 depends on GIANFAR 29 select PTP_1588_CLOCK 30 default y 31 help 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. 36 37 To compile this driver as a module, choose M here: the module 38 will be called gianfar_ptp. 39 40config PTP_1588_CLOCK_IXP46X 41 tristate "Intel IXP46x as PTP clock" 42 depends on IXP4XX_ETH 43 select PTP_1588_CLOCK 44 default y 45 help 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. 50 51 To compile this driver as a module, choose M here: the module 52 will be called ptp_ixp46x. 53 54comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks." 55 depends on PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n 56 57config DP83640_PHY 58 tristate "Driver for the National Semiconductor DP83640 PHYTER" 59 depends on NETWORK_PHY_TIMESTAMPING 60 depends on PHYLIB 61 select PTP_1588_CLOCK 62 ---help--- 63 Supports the DP83640 PHYTER with IEEE 1588 features. 64 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. 69 70 In order for this to work, your MAC driver must also 71 implement the skb_tx_timestamp() function. 72 73config PTP_1588_CLOCK_PCH 74 tristate "Intel PCH EG20T as PTP clock" 75 depends on X86 || COMPILE_TEST 76 depends on HAS_IOMEM 77 select PTP_1588_CLOCK 78 help 79 This driver adds support for using the PCH EG20T as a PTP 80 clock. The hardware supports time stamping of PTP packets 81 when using the end-to-end delay (E2E) mechansim. The peer 82 delay mechansim (P2P) is not supported. 83 84 This clock is only useful if your PTP programs are getting 85 hardware time stamps on the PTP Ethernet packets using the 86 SO_TIMESTAMPING API. 87 88 To compile this driver as a module, choose M here: the module 89 will be called ptp_pch. 90 91endmenu 92