2011-04-22 10:03:08 +00:00
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#
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# PTP clock support configuration
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#
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menu "PTP clock support"
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config PTP_1588_CLOCK
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tristate "PTP clock support"
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posix-timers: Make them configurable
Some embedded systems have no use for them. This removes about
25KB from the kernel binary size when configured out.
Corresponding syscalls are routed to a stub logging the attempt to
use those syscalls which should be enough of a clue if they were
disabled without proper consideration. They are: timer_create,
timer_gettime: timer_getoverrun, timer_settime, timer_delete,
clock_adjtime, setitimer, getitimer, alarm.
The clock_settime, clock_gettime, clock_getres and clock_nanosleep
syscalls are replaced by simple wrappers compatible with CLOCK_REALTIME,
CLOCK_MONOTONIC and CLOCK_BOOTTIME only which should cover the vast
majority of use cases with very little code.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: linux-kbuild@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: Michal Marek <mmarek@suse.com>
Cc: Edward Cree <ecree@solarflare.com>
Link: http://lkml.kernel.org/r/1478841010-28605-7-git-send-email-nicolas.pitre@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-11-11 05:10:10 +00:00
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depends on NET && POSIX_TIMERS
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2012-10-31 15:32:44 +00:00
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select PPS
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2014-04-01 14:20:23 +00:00
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select NET_PTP_CLASSIFY
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2011-04-22 10:03:08 +00:00
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help
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The IEEE 1588 standard defines a method to precisely
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synchronize distributed clocks over Ethernet networks. The
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standard defines a Precision Time Protocol (PTP), which can
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be used to achieve synchronization within a few dozen
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microseconds. In addition, with the help of special hardware
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time stamping units, it can be possible to achieve
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synchronization to within a few hundred nanoseconds.
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This driver adds support for PTP clocks as character
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devices. If you want to use a PTP clock, then you should
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also enable at least one clock driver as well.
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To compile this driver as a module, choose M here: the module
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will be called ptp.
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2011-04-22 10:03:54 +00:00
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config PTP_1588_CLOCK_GIANFAR
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tristate "Freescale eTSEC as PTP clock"
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depends on GIANFAR
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2016-11-11 05:10:07 +00:00
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depends on PTP_1588_CLOCK
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2012-10-31 15:33:52 +00:00
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default y
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2011-04-22 10:03:54 +00:00
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help
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This driver adds support for using the eTSEC as a PTP
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clock. This clock is only useful if your PTP programs are
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getting hardware time stamps on the PTP Ethernet packets
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using the SO_TIMESTAMPING API.
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To compile this driver as a module, choose M here: the module
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will be called gianfar_ptp.
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2011-04-22 10:04:31 +00:00
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config PTP_1588_CLOCK_IXP46X
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tristate "Intel IXP46x as PTP clock"
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depends on IXP4XX_ETH
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2016-11-11 05:10:07 +00:00
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depends on PTP_1588_CLOCK
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2012-10-31 15:33:52 +00:00
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default y
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2011-04-22 10:04:31 +00:00
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help
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This driver adds support for using the IXP46X as a PTP
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clock. This clock is only useful if your PTP programs are
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getting hardware time stamps on the PTP Ethernet packets
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using the SO_TIMESTAMPING API.
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To compile this driver as a module, choose M here: the module
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will be called ptp_ixp46x.
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2011-04-22 10:04:55 +00:00
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comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks."
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2012-10-31 15:33:52 +00:00
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depends on PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n
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2011-04-22 10:04:55 +00:00
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config DP83640_PHY
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tristate "Driver for the National Semiconductor DP83640 PHYTER"
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depends on NETWORK_PHY_TIMESTAMPING
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depends on PHYLIB
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2016-11-11 05:10:07 +00:00
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depends on PTP_1588_CLOCK
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2011-04-22 10:04:55 +00:00
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---help---
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Supports the DP83640 PHYTER with IEEE 1588 features.
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This driver adds support for using the DP83640 as a PTP
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clock. This clock is only useful if your PTP programs are
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getting hardware time stamps on the PTP Ethernet packets
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using the SO_TIMESTAMPING API.
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In order for this to work, your MAC driver must also
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2012-04-13 15:14:11 +00:00
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implement the skb_tx_timestamp() function.
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2011-04-22 10:04:55 +00:00
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2012-03-07 22:16:26 +00:00
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config PTP_1588_CLOCK_PCH
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tristate "Intel PCH EG20T as PTP clock"
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2014-06-17 09:59:20 +00:00
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depends on X86_32 || COMPILE_TEST
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2014-05-08 21:54:42 +00:00
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depends on HAS_IOMEM && NET
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2016-11-11 05:10:07 +00:00
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imply PTP_1588_CLOCK
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2012-03-07 22:16:26 +00:00
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help
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This driver adds support for using the PCH EG20T as a PTP
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2012-04-20 18:50:34 +00:00
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clock. The hardware supports time stamping of PTP packets
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when using the end-to-end delay (E2E) mechansim. The peer
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delay mechansim (P2P) is not supported.
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This clock is only useful if your PTP programs are getting
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hardware time stamps on the PTP Ethernet packets using the
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SO_TIMESTAMPING API.
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2012-03-07 22:16:26 +00:00
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To compile this driver as a module, choose M here: the module
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will be called ptp_pch.
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2011-04-22 10:03:08 +00:00
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endmenu
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