ptp: ocp: Add signal generators and update sysfs nodes

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Newer firmware provides 4 programmable signal generators, add
support for those here.  The signal generators provide the
ability to set the period, duty cycle, phase offset, and polarity,
with new values defaulting to prior values.

The period and phase offset are specified in nanoseconds.

E.g:    period [duty [phase [polarity]]]

  echo 500000000 > signal	# 1/2 second period
  echo 1000000 40 100 > signal	# 1ms period, 40% on, offset 100ns
  echo 0 > signal		# turn off generator

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Jonathan Lemon

2022-03-10 12:19:08 -08:00

committed by David S. Miller

parent c205d53c49

commit b325af3cfa

1 changed files with 476 additions and 10 deletions

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drivers/ptp/ptp_ocp.c

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