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Message-Id: <1434138905-15886-7-git-send-email-pantelis.antoniou@konsulko.com> Date: Fri, 12 Jun 2015 22:55:03 +0300 From: Pantelis Antoniou <pantelis.antoniou@...sulko.com> To: Rob Herring <robherring2@...il.com> Cc: Grant Likely <grant.likely@...retlab.ca>, Matt Porter <mporter@...sulko.com>, Koen Kooi <koen@...inion.thruhere.net>, Guenter Roeck <linux@...ck-us.net>, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Pantelis Antoniou <pantelis.antoniou@...sulko.com>, Pantelis Antoniou <panto@...oniou-consulting.com> Subject: [PATCH 6/8] doc: dt: Document the target root overlay method Add a description of the target root overlay method to the overlay documention file. Signed-off-by: Pantelis Antoniou <pantelis.antoniou@...sulko.com> --- Documentation/devicetree/overlay-notes.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/overlay-notes.txt b/Documentation/devicetree/overlay-notes.txt index dd595e6..00ede57 100644 --- a/Documentation/devicetree/overlay-notes.txt +++ b/Documentation/devicetree/overlay-notes.txt @@ -104,6 +104,10 @@ If your board has multiple slots/places where a single overlay can work and each slot is defined by a node, you can use the of_overlay_create_indirect() method to select the target. +For overlays on probeable busses, use the of_overlay_create_target_root() method +in which you supply a device node as a target root, and which all target +references in the overlay are performed relative to that node. + Overlay DTS Format ------------------ @@ -144,3 +148,7 @@ contains the information required to map from a phandle to a tree location. The indirect target requires the use of a selector target on the call to of_overlay_create_indirect(). I.e. passing the "foo" id will select the target in the foo node, "bar" in bar node, etc. + +Note that when using the target root create method all target references must +lie under the target root node. I.e. the overlay is not allowed to 'break' out +of the root. -- 1.7.12 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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