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author | Richard Cochran <richardcochran@gmail.com> | 2011-04-22 12:03:08 +0200 |
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committer | John Stultz <john.stultz@linaro.org> | 2011-05-23 13:01:00 -0700 |
commit | d94ba80ebbea17f036cecb104398fbcd788aa742 (patch) | |
tree | 7fe40228c5ea2bb77f2892b722d27155df8c1157 /drivers/ptp/Kconfig | |
parent | caebc160ce3f76761cc62ad96ef6d6f30f54e3dd (diff) | |
download | linux-stable-d94ba80ebbea17f036cecb104398fbcd788aa742.tar.gz linux-stable-d94ba80ebbea17f036cecb104398fbcd788aa742.tar.bz2 linux-stable-d94ba80ebbea17f036cecb104398fbcd788aa742.zip |
ptp: Added a brand new class driver for ptp clocks.
This patch adds an infrastructure for hardware clocks that implement
IEEE 1588, the Precision Time Protocol (PTP). A class driver offers a
registration method to particular hardware clock drivers. Each clock is
presented as a standard POSIX clock.
The ancillary clock features are exposed in two different ways, via
the sysfs and by a character device.
Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'drivers/ptp/Kconfig')
-rw-r--r-- | drivers/ptp/Kconfig | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig new file mode 100644 index 000000000000..70d4bb1cbdab --- /dev/null +++ b/drivers/ptp/Kconfig @@ -0,0 +1,30 @@ +# +# 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. + +endmenu |