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| 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_sysfs.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_sysfs.c')
| -rw-r--r-- | drivers/ptp/ptp_sysfs.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_sysfs.c b/drivers/ptp/ptp_sysfs.c index f30b0a439470..77219cdcd683 100644 --- a/drivers/ptp/ptp_sysfs.c +++ b/drivers/ptp/ptp_sysfs.c @@ -18,6 +18,17 @@ static ssize_t clock_name_show(struct device *dev, } static DEVICE_ATTR_RO(clock_name); +static ssize_t max_phase_adjustment_show(struct device *dev, + struct device_attribute *attr, + char *page) +{ + struct ptp_clock *ptp = dev_get_drvdata(dev); + + return snprintf(page, PAGE_SIZE - 1, "%d\n", + ptp->info->getmaxphase(ptp->info)); +} +static DEVICE_ATTR_RO(max_phase_adjustment); + #define PTP_SHOW_INT(name, var) \ static ssize_t var##_show(struct device *dev, \ struct device_attribute *attr, char *page) \ @@ -309,6 +320,7 @@ static struct attribute *ptp_attrs[] = { &dev_attr_clock_name.attr, &dev_attr_max_adjustment.attr, + &dev_attr_max_phase_adjustment.attr, &dev_attr_n_alarms.attr, &dev_attr_n_external_timestamps.attr, &dev_attr_n_periodic_outputs.attr, |