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| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2023-08-07 22:33:19 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-08-09 15:59:21 -0700 |
| commit | 40b0425f8ba17c32cf7182975032a3999c364dfc (patch) | |
| tree | 926373d1ae17ee15d0c3c89c27ea7cbe1ac7d480 /drivers/ptp/Kconfig | |
| parent | 665338b2a7a0139337d1f85be65ed16e487f84c1 (diff) | |
| download | linux-stable-40b0425f8ba17c32cf7182975032a3999c364dfc.tar.gz linux-stable-40b0425f8ba17c32cf7182975032a3999c364dfc.tar.bz2 linux-stable-40b0425f8ba17c32cf7182975032a3999c364dfc.zip | |
net: ptp: create a mock-up PTP Hardware Clock driver
There are several cases where virtual net devices may benefit from
having a PTP clock, and these have to do with testing. I can see at
least netdevsim and veth as potential users of a common mock-up PTP
hardware clock driver.
The proposed idea is to create an object which emulates PTP clock
operations on top of the unadjustable CLOCK_MONOTONIC_RAW plus a
software-controlled time domain via a timecounter/cyclecounter and then
link that PHC to the netdevsim device.
The driver is fully functional for its intended purpose, and it
successfully passes the PTP selftests.
$ cd tools/testing/selftests/ptp/
$ ./phc.sh /dev/ptp2
TEST: settime [ OK ]
TEST: adjtime [ OK ]
TEST: adjfreq [ OK ]
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20230807193324.4128292-7-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/ptp/Kconfig')
| -rw-r--r-- | drivers/ptp/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig index 32dff1b4f891..ed9d97a032f1 100644 --- a/drivers/ptp/Kconfig +++ b/drivers/ptp/Kconfig @@ -155,6 +155,17 @@ config PTP_1588_CLOCK_IDTCM To compile this driver as a module, choose M here: the module will be called ptp_clockmatrix. +config PTP_1588_CLOCK_MOCK + tristate "Mock-up PTP clock" + depends on PTP_1588_CLOCK + help + This driver offers a set of PTP clock manipulation operations over + the system monotonic time. It can be used by virtual network device + drivers to emulate PTP capabilities. + + To compile this driver as a module, choose M here: the module + will be called ptp_mock. + config PTP_1588_CLOCK_VMW tristate "VMware virtual PTP clock" depends on ACPI && HYPERVISOR_GUEST && X86 |