linux-kernel - [PATCH v4 0/3] of: overlay: load overlay symbols into live device tree

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Message-Id: <1500481523-31083-1-git-send-email-frowand.list@gmail.com>
Date:   Wed, 19 Jul 2017 09:25:19 -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 v4 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.

changes since v3:
  - fix make W=2 warnings in overlay_base.dts and overlay.dts
  - update the test results in the patch comments to match the
    .dts changes

changes since v2:
  - test on 4.13-rc1
  - remove redundant comments from patch headers of patch 0 and patch 1
  - guard make of overlay .dtb files with CONFIG_OF_OVERLAY
  - guard unittest.c references to overlay .dtb files with
    CONFIG_OF_OVERLAY

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               |  19 +++-
 drivers/of/unittest-data/overlay.dts            |  25 ++++-
 drivers/of/unittest-data/overlay_bad_symbol.dts |  22 +++++
 drivers/of/unittest-data/overlay_base.dts       |  11 +++
 drivers/of/unittest.c                           |  10 +-
 6 files changed, 190 insertions(+), 18 deletions(-)
 create mode 100644 drivers/of/unittest-data/overlay_bad_symbol.dts

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