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From: Heinrich Schuchardt <xypron.glpk@gmx.de>
To: Pantelis Antoniou <pantelis.antoniou@konsulko.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Frank Rowand <frowand.list@gmail.com>
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	Heinrich Schuchardt <xypron.glpk@gmx.de>
Subject: [PATCH 3/4 v2] of/overlay: documentation for sysfs ABI
Date: Tue, 20 Dec 2016 20:04:54 +0100	[thread overview]
Message-ID: <20161220190455.25115-4-xypron.glpk@gmx.de> (raw)
In-Reply-To: <20161220190455.25115-1-xypron.glpk@gmx.de>

The sysfs filesystem ABI to load and unload device tree
overlays is decribed.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---

v2:
	Change sysfs path to
	/sys/firmware/devicetree/overlays

 .../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 0000000..bda0001
--- /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.
-- 
2.10.2

  parent reply	other threads:[~2016-12-20 19:06 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-20 19:04 [PATCH 0/4 v2] of/overlay: sysfs based ABI for dt overlays Heinrich Schuchardt
2016-12-20 19:04 ` [PATCH 1/4 v2] of/overlay: add API function to count and pop last Heinrich Schuchardt
2016-12-20 19:04   ` Heinrich Schuchardt
2016-12-20 19:04 ` [PATCH 2/4 v2] of/overlay: sysfs based ABI for dt overlays Heinrich Schuchardt
2016-12-20 19:04 ` Heinrich Schuchardt [this message]
2016-12-20 19:04 ` [PATCH 4/4 v2] of/overlay: test count and destroy_last Heinrich Schuchardt
2016-12-22 19:00 ` [PATCH 0/4 v2] of/overlay: sysfs based ABI for dt overlays Frank Rowand
2016-12-22 19:00   ` Frank Rowand
2017-01-03 12:11   ` Pantelis Antoniou
2017-01-03 12:11     ` Pantelis Antoniou
2017-01-03 17:25     ` Heinrich Schuchardt
2017-01-03 17:25       ` Heinrich Schuchardt

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