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timekeeping: Add support for AUX clock cross timestamping

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Now that all prerequisites are in place add the final support for AUX
clocks in get_device_system_crosststamp(), which enables the PTP layer to
support hardware cross timestamps with a new IOTCL.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Arthur Kiyanovski <akiyano@amazon.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20260529195558.097464513@kernel.org
This commit is contained in:
Thomas Gleixner 2026-05-29 22:01:21 +02:00
parent 5ccaf1e569
commit 9aebde8af6
1 changed files with 6 additions and 0 deletions
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6
kernel/time/timekeeping.c
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@ -1517,6 +1517,12 @@ int get_device_system_crosststamp(int (*get_time_fn)
tkd = &tk_core;
offs = &tk_core.timekeeper.offs_real;
break;
case CLOCK_AUX ... CLOCK_AUX_LAST:
tkd = aux_get_tk_data(xtstamp->clock_id);
if (!tkd)
return -ENODEV;
offs = &tkd->timekeeper.offs_aux;
break;
default:
WARN_ON_ONCE(1);
return -ENODEV;