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Re: [gpsd-dev] Problem with PPS detection - using Centos 7 and gpsd dev-
Re: [gpsd-dev] Problem with PPS detection - using Centos 7 and gpsd dev-3.19a
Sat, 12 Jan 2019 13:32:58 -0800
There are two ways to process PPS info.
There is the kernel mode PPS processing. Basically, the kernel grabs a time
stamp at interrupt time when DCD changes. There is an RFC describing the API
to get that info.
There is also an IOCTL to wake up a user process on DCD changes. User code
can then grab a time stamp.
I suspect your driver is missing a few lines of code to support one or the
other. You can probably find it by comparing with a known-good driver.
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