From: Heinrich Schuchardt <xypron.glpk@gmx.de>
To: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Frank Rowand <frowand.list@gmail.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Heinrich Schuchardt <xypron.glpk@gmx.de>
Subject: [PATCH 3/3] of/overlay: documentation for sysfs ABI
Date: Mon, 19 Dec 2016 02:10:35 +0100 [thread overview]
Message-ID: <1482109835-9000-4-git-send-email-xypron.glpk@gmx.de> (raw)
In-Reply-To: <1482109835-9000-1-git-send-email-xypron.glpk@gmx.de>
The sysfs filesystem ABI to load and unload devicetree
overlays is decribed.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---
.../ABI/testing/sysfs-firmware-devicetree-overlays | 24 ++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
diff --git a/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
new file mode 100644
index 000000000000..ce25b637028c
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
@@ -0,0 +1,24 @@
+What: /sys/firmware/devicetree-overlays
+Date: Dec 2016
+KernelVersion: 4.11
+Contact: Heinrich Schuchardt <xypron.glpk@gmx.de>
+Description: Devicetree overlays can be used to update the devicetree
+ while the system is running. For details see
+ Documentation/devicetree/overlay-notes.txt.
+
+ The following attributes are provided:
+
+ load: This is a write only file.
+ A string written to it is interpreted as the path to a
+ flattened device tree overlay file. It is used to create
+ and apply the contained overlays.
+
+ loaded: This is a read only file.
+ It provides the count of loaded overlays as a decimal
+ number.
+
+ unload: This is a write only file.
+ If a positive number n is wrtten to this file the n
+ most recent overlays are destroyed.
+ If a negative number is written to this file all
+ overlays are destroyed.
--
2.11.0
prev parent reply other threads:[~2016-12-19 1:13 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-19 1:10 [PATCH 0/3] of/overlay: sysfs based ABI for dt overlays Heinrich Schuchardt
2016-12-19 1:10 ` [PATCH 1/3] of/overlay: add API function to count and pop last Heinrich Schuchardt
2016-12-19 2:15 ` kbuild test robot
2016-12-19 1:10 ` [PATCH 2/3] of/overlay: sysfs based ABI for dt overlays Heinrich Schuchardt
2016-12-19 2:34 ` kbuild test robot
2016-12-19 8:03 ` Heinrich Schuchardt
2016-12-19 1:10 ` Heinrich Schuchardt [this message]
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=1482109835-9000-4-git-send-email-xypron.glpk@gmx.de \
--to=xypron.glpk@gmx.de \
--cc=devicetree@vger.kernel.org \
--cc=frowand.list@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=robh+dt@kernel.org \
/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).