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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

      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]

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