path: root/Documentation/ptp
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2013-09-23ptp: add the PTP_SYS_OFFSET ioctl to the testptp programDong Zhu1-2/+63
This patch add a method into testptp.c to measure the time offset between phc and system clock through the ioctl PTP_SYS_OFFSET. Signed-off-by: Dong Zhu <bluezhudong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-23ptp: Added a brand new class driver for ptp clocks.Richard Cochran3-0/+503
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>

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