diff options
| author | Rahul Rameshbabu <rrameshbabu@nvidia.com> | 2023-06-12 23:14:56 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-06-20 10:02:33 +0200 |
| commit | c3b60ab7a4dff6e6e608e685b70ddc3d6b2aca81 (patch) | |
| tree | 5ca798c8795ce133b62d61fc7400919ad9f52dd2 /drivers/ptp/ptp_chardev.c | |
| parent | testptp: Add support for testing ptp_clock_info .adjphase callback (diff) | |
| download | linux-c3b60ab7a4dff6e6e608e685b70ddc3d6b2aca81.tar.xz linux-c3b60ab7a4dff6e6e608e685b70ddc3d6b2aca81.zip | |
ptp: Add .getmaxphase callback to ptp_clock_info
Enables advertisement of the maximum offset supported by the phase control
functionality of PHCs. The callback is used to return an error if an offset
not supported by the PHC is used in ADJ_OFFSET. The ioctls
PTP_CLOCK_GETCAPS and PTP_CLOCK_GETCAPS2 now advertise the maximum offset a
PHC's phase control functionality is capable of supporting. Introduce new
sysfs node, max_phase_adjustment.
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Maciek Machnikowski <maciek@machnikowski.net>
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp/ptp_chardev.c')
| -rw-r--r-- | drivers/ptp/ptp_chardev.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c index af3bc65c4595..362bf756e6b7 100644 --- a/drivers/ptp/ptp_chardev.c +++ b/drivers/ptp/ptp_chardev.c @@ -136,7 +136,10 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg) caps.pps = ptp->info->pps; caps.n_pins = ptp->info->n_pins; caps.cross_timestamping = ptp->info->getcrosststamp != NULL; - caps.adjust_phase = ptp->info->adjphase != NULL; + caps.adjust_phase = ptp->info->adjphase != NULL && + ptp->info->getmaxphase != NULL; + if (caps.adjust_phase) + caps.max_phase_adj = ptp->info->getmaxphase(ptp->info); if (copy_to_user((void __user *)arg, &caps, sizeof(caps))) err = -EFAULT; break; |