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Subject[PATCH v2 net-next 0/3] ptp: ptp_clockmatrix: Fix output 1 PPS alignment.
From: Vincent Cheng <>

This series fixes a race condition that may result in the output clock
not aligned to internal 1 PPS clock.

Part of device initialization is to align the rising edge of output
clocks to the internal rising edge of the 1 PPS clock. If the system
APLL and DPLL are not locked when this alignment occurs, the alignment
fails and a fixed offset between the internal 1 PPS clock and the
output clock occurs.

If a clock is dynamically enabled after power-up, the output clock
also needs to be aligned to the internal 1 PPS clock.

Suggested by: Richard Cochran <>
- Added const to "char * fmt"
- Break unrelated header change into separate patch

Vincent Cheng (3):
ptp: ptp_clockmatrix: Add wait_for_sys_apll_dpll_lock.
ptp: ptp_clockmatrix: Add alignment of 1 PPS to idtcm_perout_enable.
ptp: ptp_clockmatrix: Remove unused header declarations.

drivers/ptp/idt8a340_reg.h | 10 +++++
drivers/ptp/ptp_clockmatrix.c | 92 ++++++++++++++++++++++++++++++++++++++++---
drivers/ptp/ptp_clockmatrix.h | 17 +++++++-
3 files changed, 112 insertions(+), 7 deletions(-)


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