Messages in this thread | | | Date | Mon, 2 Oct 2023 21:16:57 -0700 | Subject | [PATCHv2 next 0/3] add ptp_gettimex64any() API | From | Mahesh Bandewar <> |
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The current API to get the sandwich TS for the master-PTP clock read supports only the sys-time sandwich. This is not really suitable for all the use cases of sandwich TS needs. Ideally it should allow a choice of a timebase to use for ts-sandwich need. Updating the existing API [gettimex64()] is not an option since it would break compatibility.
About the name - This is a superset of current gettimex64. Since the timebase for gettimex64 is fixed and is only 'sys-time / real-time'. I'm appending "any" to add the choice factor. so gettimex64any() would give you eXtended time with sandwitch TS of a timebase of your choice. If there is a better name, I won't mind changing.
The timebase options are - CLOCK_REALTIME, CLOCK_MONOTONIC, & CLOCK_MONOTONIC_RAW
The CLOCK_REALTIME option is equivalent of using current gettimex64() method.
The first patch adds this new PTP method while the second patch adds the ioctl support for this method.
The last patch in the series updates the selftest to exercise this new method.
Mahesh Bandewar (3): ptp: add ptp_gettimex64any() support ptp: add ioctl interface for ptp_gettimex64any() selftes/ptp: extend test to include ptp_gettimex64any()
drivers/ptp/ptp_chardev.c | 34 ++++++++++++ include/linux/ptp_clock_kernel.h | 51 ++++++++++++++++++ include/uapi/linux/ptp_clock.h | 21 ++++++++ tools/testing/selftests/Makefile | 1 + tools/testing/selftests/ptp/testptp.c | 76 ++++++++++++++++++++++++++- 5 files changed, 181 insertions(+), 2 deletions(-)
v1 -> v2 * Removed ktime_get_cycles64() implementation * Removed CYCLES as an option -- 2.42.0.582.g8ccd20d70d-goog
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