Re: [PATCH] PPS: Restore lost capture-clear option to pps-gpio module.

From: Jan Lübbe
Date: Thu Apr 09 2015 - 09:05:21 EST

Hi Gary,

On Do, 2015-04-02 at 12:21 -0700, Gary E. Miller wrote:
> In the conversion from platform to device tree the capture-clear
> option was lost.
> capture-clear is needed so that time_pps_fetch() will report both
> edges of each PPS pulse. Both edges are needed so that userland
> programs, like gpsd, can autodetect the leading and trailing PPS
> edges.

This is intentional. The userspace program can configure which edges it
wants to capture at runtime. Only the polarity (assert-falling-edge) is
actually determined by the hardware and must be described in the device

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