On Tue, Jul 14, 2026 at 03:03:42PM +0200, Sven Schnelle wrote:

Only register the physical clock when facility 28 is installed
and PTFF QAF returns that PTFF QPT is available.

Fixes: 2d7de7a3010d ("s390/time: Add PtP driver")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Cc: stable@kernel.org
---
 drivers/ptp/ptp_s390.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>