[patch 23/24] timekeeping: Add support for AUX clock cross timestamping

[Thomas Gleixner]

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 <t...@kernel.org>
---
 kernel/time/timekeeping.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1518,6 +1518,12 @@ int get_device_system_crosststamp(int (*
                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 false;
+               offs = &tkd->timekeeper.offs_aux;
+               break;
        default:
                WARN_ON_ONCE(1);
                return false;