From: Tom Burkart <tom@aussec.com>
To: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Cc: Tom Burkart <tom@aussec.com>,
devicetree@vger.kernel.org, Lukas Senger <lukas@fridolin.com>
Subject: [PATCH v11 2/3] dt-bindings: pps: pps-gpio PPS ECHO implementation
Date: Thu, 29 Nov 2018 11:26:25 +1100 [thread overview]
Message-ID: <20181129002626.5410-3-tom@aussec.com> (raw)
In-Reply-To: <20181129002626.5410-2-tom@aussec.com>
This patch implements the device tree changes required for the pps
echo functionality for pps-gpio, that sysfs claims is available
already.
This patch was originally written by Lukas Senger as part of a masters
thesis project and modified for inclusion into the linux kernel by Tom
Burkart.
Signed-off-by: Lukas Senger <lukas@fridolin.com>
Signed-off-by: Tom Burkart <tom@aussec.com>
---
Documentation/devicetree/bindings/pps/pps-gpio.txt | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/Documentation/devicetree/bindings/pps/pps-gpio.txt b/Documentation/devicetree/bindings/pps/pps-gpio.txt
index 3683874832ae..3760c271f211 100644
--- a/Documentation/devicetree/bindings/pps/pps-gpio.txt
+++ b/Documentation/devicetree/bindings/pps/pps-gpio.txt
@@ -7,9 +7,14 @@ Required properties:
- compatible: should be "pps-gpio"
- gpios: one PPS GPIO in the format described by ../gpio/gpio.txt
+Additional required properties for the PPS ECHO functionality:
+- echo-gpios: one PPS ECHO GPIO in the format described by ../gpio/gpio.txt
+- echo-active-ms: duration in ms of the active portion of the echo pulse
+
Optional properties:
- assert-falling-edge: when present, assert is indicated by a falling edge
(instead of by a rising edge)
+- invert-pps-echo: when present, invert the PPS ECHO pulse
Example:
pps {
@@ -19,5 +24,9 @@ Example:
gpios = <&gpio1 26 GPIO_ACTIVE_HIGH>;
assert-falling-edge;
+ echo-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
+ echo-active-ms = <100>;
+ invert-pps-echo;
+
compatible = "pps-gpio";
};
--
2.12.3
next prev parent reply other threads:[~2018-11-29 0:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-29 0:26 [PATCH v11 0/3] PPS: pps-gpio PPS ECHO implementation Tom Burkart
2018-11-29 0:26 ` [PATCH v11 1/3] pps: descriptor-based gpio Tom Burkart
2018-11-29 0:26 ` Tom Burkart [this message]
2018-11-29 0:26 ` [PATCH v11 3/3] pps: pps-gpio pps-echo implementation Tom Burkart
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=20181129002626.5410-3-tom@aussec.com \
--to=tom@aussec.com \
--cc=devicetree@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lukas@fridolin.com \
/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;
as well as URLs for NNTP newsgroup(s).