Merge branch 'ptp-ptp_clockmatrix-Fix-output-1-PPS-alignment'

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Vincent Cheng says:

====================
ptp: ptp_clockmatrix: Fix output 1 PPS alignment.

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.

v3:
Suggested by: Jakub Kicinski <kuba@kernel.org>
- Remove unnecessary 'err' variable
- Increase msleep()/loop accuracy by using jiffies in while()
- No empty lines between variables
- No empty lines between call and the if
- parenthesis around a == b are unnecessary
- Inconsistent \n usage in dev_()
- Remove unnecessary empty line
- Leave string format in place so static code checkers can
  validate arguments

v2:
Suggested by: Richard Cochran <richardcochran@gmail.com>
- Added const to "char * fmt"
- Break unrelated header change into separate patch
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

David S. Miller 2021-02-17 13:49:26 -08:00

parent 8574908073 77fdb168a3

commit 41f1a01bb6

3 changed files with 162 additions and 178 deletions

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10

drivers/ptp/idt8a340_reg.h

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313

drivers/ptp/ptp_clockmatrix.c

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17

drivers/ptp/ptp_clockmatrix.h

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