From: "Jan Lübbe" <jlu@pengutronix.de>
To: "Gary E. Miller" <gem@rellim.com>
Cc: linux-kernel@vger.kernel.org,
Rodolfo Giometti <giometti@enneenne.com>,
Ricardo Martin s <rasm@fe.up.pt>,
James Nus s <jamesnuss@nanometrics.ca>
Subject: Re: [PATCH] PPS: Restore lost capture-clear option to pps-gpio module.
Date: Thu, 09 Apr 2015 15:05:09 +0200 [thread overview]
Message-ID: <1428584709.7346.25.camel@pengutronix.de> (raw)
In-Reply-To: <201504022004.t32K4xbW013508@spidey.rellim.com>
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
tree.
Regards,
Jan
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
next prev parent reply other threads:[~2015-04-09 13:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-02 19:21 Gary E. Miller
2015-04-09 13:05 ` Jan Lübbe [this message]
2015-04-09 19:49 ` Gary E. Miller
2015-04-10 8:15 ` Jan Lübbe
2015-04-10 18:13 ` Gary E. Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1428584709.7346.25.camel@pengutronix.de \
--to=jlu@pengutronix.de \
--cc=gem@rellim.com \
--cc=giometti@enneenne.com \
--cc=jamesnuss@nanometrics.ca \
--cc=linux-kernel@vger.kernel.org \
--cc=rasm@fe.up.pt \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®