From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Boyd Subject: [RFC/PATCH 0/4] New style overlay and /expansion/ support Date: Mon, 30 Jan 2017 16:02:55 -0800 Message-ID: <20170131000259.28576-1-stephen.boyd@linaro.org> Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=jDUEf0MYCSSlPgLYXcTRuL6BxUOCzm44j615iLwiIr0=; b=Bb6McaoolG4gjAgo/TNOWj2i5MddVAAzyT6RozwJQiYqdvoxe/JzuPTuWLXgRxxiwG xRDfbKjFUrftCSDeezBKB9haPYgJSvMJqEfjxU3JIjwZV601BTYyJyLwXUdDPLeNbKWo wZSf/XZno1zE6HskMzx3t8S/Kc0cfa+u5Q9NM= Sender: linux-i2c-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: David Gibson Cc: devicetree-compiler@vger.kernel.org, Frank Rowand , Pantelis Antoniou , Rob Herring , Mark Brown , Grant Likely , Mark Rutland , mporter@konsulko.com, Koen Kooi , Guenter Roeck , marex@denx.de, Wolfram Sang , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org This series revives the new style of overlay syntax that never got merged. David said he wanted to handle it outside of the parse phase[1], and he proposed a patch to move overlay application to the livetree phase. I've applied that patch and reworked Pantelis' last two patches for the new style "syntactic sugar" on top[2]. In addition, I've included the new /expansion/ keyword support for overlays that don't reference any labels that are outside of the input file. The new expansion keyword just transforms the unresolved references into strings that go into a new 'target-alias' property instead of the 'target' property. This is in line with what David has proposed on the mailing list a few months ago[3]. RFC part: The current syntax requires a root node or overlays are rejected. Making the root node optional would require some non-trivial rework of the grammar to support it. This means the proposed 'new style' syntax doesn't work without the root node. [1] https://lkml.kernel.org/r/20161125041124.GB12287@umbus.fritz.box [2] https://lkml.kernel.org/r/1481114903-8197-7-git-send-email-pantelis.antoniou@konsulko.com [3] https://lkml.kernel.org/r/20160718142037.GS16769@voom.fritz.box David Gibson (1): Start moving overlay handling from parser into dtc core Pantelis Antoniou (1): tests: Add a test for overlays syntactic sugar Stephen Boyd (2): dtc: Add syntactic sugar version of overlays dtc: Add /expansion/ support checks.c | 2 +- dtc-lexer.l | 6 +++ dtc-parser.y | 68 +++++++++++++++++----------------- dtc.c | 16 +++++++- dtc.h | 20 +++++++++- flattree.c | 2 +- fstree.c | 2 +- livetree.c | 80 +++++++++++++++++++++++++++++++++++++++- tests/overlay_overlay_simple.dts | 3 ++ tests/run_tests.sh | 6 +++ 10 files changed, 163 insertions(+), 42 deletions(-) -- 2.10.0.297.gf6727b0