# # PTP clock support configuration # menu "PTP clock support" config PTP_1588_CLOCK tristate "PTP clock support" select PPS help The IEEE 1588 standard defines a method to precisely synchronize distributed clocks over Ethernet networks. The standard defines a Precision Time Protocol (PTP), which can be used to achieve synchronization within a few dozen microseconds. In addition, with the help of special hardware time stamping units, it can be possible to achieve synchronization to within a few hundred nanoseconds. This driver adds support for PTP clocks as character devices. If you want to use a PTP clock, then you should also enable at least one clock driver as well. To compile this driver as a module, choose M here: the module will be called ptp. config PTP_1588_CLOCK_GIANFAR tristate "Freescale eTSEC as PTP clock" depends on GIANFAR select PTP_1588_CLOCK default y help This driver adds support for using the eTSEC as a PTP clock. This clock is only useful if your PTP programs are getting hardware time stamps on the PTP Ethernet packets using the SO_TIMESTAMPING API. To compile this driver as a module, choose M here: the module will be called gianfar_ptp. config PTP_1588_CLOCK_IXP46X tristate "Intel IXP46x as PTP clock" depends on IXP4XX_ETH select PTP_1588_CLOCK default y help This driver adds support for using the IXP46X as a PTP clock. This clock is only useful if your PTP programs are getting hardware time stamps on the PTP Ethernet packets using the SO_TIMESTAMPING API. To compile this driver as a module, choose M here: the module will be called ptp_ixp46x. comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks." depends on PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n config DP83640_PHY tristate "Driver for the National Semiconductor DP83640 PHYTER" depends on NETWORK_PHY_TIMESTAMPING depends on PHYLIB select PTP_1588_CLOCK ---help--- Supports the DP83640 PHYTER with IEEE 1588 features. This driver adds support for using the DP83640 as a PTP clock. This clock is only useful if your PTP programs are getting hardware time stamps on the PTP Ethernet packets using the SO_TIMESTAMPING API. In order for this to work, your MAC driver must also implement the skb_tx_timestamp() function. config PTP_1588_CLOCK_PCH tristate "Intel PCH EG20T as PTP clock" select PTP_1588_CLOCK help This driver adds support for using the PCH EG20T as a PTP clock. The hardware supports time stamping of PTP packets when using the end-to-end delay (E2E) mechansim. The peer delay mechansim (P2P) is not supported. This clock is only useful if your PTP programs are getting hardware time stamps on the PTP Ethernet packets using the SO_TIMESTAMPING API. To compile this driver as a module, choose M here: the module will be called ptp_pch. endmenu