Thread (7 messages) 7 messages, 2 authors, 2021-02-17

[PATCH v2 net-next 0/3] ptp: ptp_clockmatrix: Fix output 1 PPS alignment.

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STALE2081d SUPERSEDED

From: <hidden>
Date: 2021-02-13 05:37:06
Also in: lkml
Subsystem: networking drivers, ptp hardware clock support, the rest · Maintainers: Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Richard Cochran, Linus Torvalds

Status: Superseded by v3 (posted 2021-02-17). [go to v3]

Revision v2 (3 revisions archived).

Revisions (3)
  1. v1
  2. v2 current [diff against previous]
  3. v3 [diff against previous]
From: Vincent Cheng <redacted>

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.

v2:
Suggested by: Richard Cochran [off-list ref]
- 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(-)

-- 
2.7.4
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