linux-kernel - [PATCH v2 0/3] of: overlay: load overlay symbols into live device tree

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Message-Id: <1499713523-19184-1-git-send-email-frowand.list@gmail.com>
Date:   Mon, 10 Jul 2017 12:05:19 -0700
From:   frowand.list@...il.com
To:     Rob Herring <robh+dt@...nel.org>, pantelis.antoniou@...sulko.com,
        Pantelis Antoniou <panto@...oniou-consulting.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/3] of: overlay: load overlay symbols into live device tree

From: Frank Rowand <frank.rowand@...y.com>

Symbols in a loaded overlay are not currently available to subsequently
loaded overlays because the properties in the overlay's __symbols__
node are not loaded into the live device tree.

Patch 1 is unittests to test patches 2 and 3.

Patch 2 fixes a problem discovered while developing patch 3.  If
a node name in an overlay has a unit-address then the overlay
code does not correctly match the node name against an existing
node in the live tree.

Patch 3 adds the properties in an overlay's __symbol__ node to
the overlay changeset.

This patch set was created on top of v4.12, with Rob's pull request
for 4.13 added (https://lkml.org/lkml/2017/7/6/691).  Thus this
series should apply on 4.13-rc1 when that becomes available.  I will
re-test on 4.13-rc1.

changes since v1:
  - patch 2: Use for_each_child_of_node() instead of open coding,
    which allowed removing the new function child_by_full_name().

Frank Rowand (3):
  of: overlay: add overlay unittest data for node names and symbols
  of: overlay: correctly apply overlay node with unit-address
  of: overlay: add overlay symbols to live device tree

 drivers/of/overlay.c                            | 121 ++++++++++++++++++++++--
 drivers/of/unittest-data/Makefile               |   3 +
 drivers/of/unittest-data/overlay.dts            |  19 +++-
 drivers/of/unittest-data/overlay_bad_symbol.dts |  22 +++++
 drivers/of/unittest-data/overlay_base.dts       |   7 ++
 drivers/of/unittest.c                           |   6 ++
 6 files changed, 167 insertions(+), 11 deletions(-)
 create mode 100644 drivers/of/unittest-data/overlay_bad_symbol.dts

-- 
Frank Rowand <frank.rowand@...y.com>