#
  # PTP clock support configuration
  #
  
  menu "PTP clock support"
  
  comment "Enable Device Drivers -> PPS to see the PTP clock options."
  	depends on PPS=n
  
  config PTP_1588_CLOCK
  	tristate "PTP clock support"
  	depends on EXPERIMENTAL
  	depends on 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 PTP_1588_CLOCK
  	depends on GIANFAR
  	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 PTP_1588_CLOCK
  	depends on IXP4XX_ETH
  	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 PTP_1588_CLOCK && (PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n)
  
  config DP83640_PHY
  	tristate "Driver for the National Semiconductor DP83640 PHYTER"
  	depends on PTP_1588_CLOCK
  	depends on NETWORK_PHY_TIMESTAMPING
  	depends on PHYLIB
  	---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_timetamp() function.

  endmenu