Documentation: ABI: overlays - per overlay docs
Documentation for the per-overlay attributes.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/1462799403-10083-7-git-send-email-pantelis.antoniou@konsulko.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
diff --git a/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
index e938f44..88d1549 100644
--- a/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
+++ b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
@@ -22,3 +22,31 @@
to be a high-level one-way "off" switch for the interface so
that systems that have this interface can choose to turn it off
during initial boot, etc."
+
+What: /sys/firmware/devicetree/overlays/<id>
+Date: October 2015
+Contact: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
+Description:
+ Each directory represents an applied overlay, containing
+ the following attribute files.
+
+What: /sys/firmware/devicetree/overlays/<id>/can_remove
+Date: October 2015
+Contact: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
+Description:
+ The attribute set to 1 means that the overlay can be removed,
+ while 0 means that the overlay is being overlapped therefore
+ removal is prohibited.
+
+What: /sys/firmware/devicetree/overlays/<id>/<fragment-name>/
+Date: October 2015
+Contact: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
+Description:
+ Each of these directories contain information about of the
+ particular overlay fragment.
+
+What: /sys/firmware/devicetree/overlays/<id>/<fragment-name>/target
+Date: October 2015
+Contact: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
+Description:
+ The full-path of the target of the fragment
