linux-kernel - [PATCH 0/6] of: Implement iterator for phandles

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Message-Id: <1458669509-7178-1-git-send-email-joro@8bytes.org>
Date:	Tue, 22 Mar 2016 18:58:23 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Rob Herring <robh+dt@...nel.org>, grant.likely@...aro.org
Cc:	Will Deacon <will.deacon@....com>,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	jroedel@...e.de, Joerg Roedel <joro@...tes.org>
Subject: [PATCH 0/6] of: Implement iterator for phandles

Hi,

here is an implementation of the iterator over phandles
concept which Rob Herring suggested to me some time ago. My
approach is a little bit different from what the diff showed
back then, but it gets rid of the allocation and 'struct
'struct of_phandle_args' misuse.

I also converted the arm-smmu driver to make use of the
iterator. The resulting kernel boots on my AMD Seattle
system and fixes the warning triggered there. The patches
now also pass all dt-unittests in my kvm environment.

Please review. Patches are based on v4.5.

Thanks,

	Joerg

Changes since RFC post:

* Reordered members of 'struct of_phandle_iterator' and did
  some renaming

* Removed index counting from the iterator

* Split up iterator implementation into multiple patches

* Fixed the code to survive all dt-unittests, tested with each
  patch in this series

* Re-added and updated some comments which got lost during the
  conversion.

* Added of_for_each_phandle macro for easier handling

* Moved the counting special-case from __of_parse_phandle_with_args
  directly to of_count_phandle_with_args for code
  simplification

* Removed some iterator helper functions

* Formatting and style changes

Joerg Roedel (6):
  of: Introduce struct of_phandle_iterator
  of: Move phandle walking to of_phandle_iterator_next()
  of: Remove counting special case from __of_parse_phandle_with_args()
  of: Introduce of_for_each_phandle() helper macro
  of: Introduce of_phandle_iterator_args()
  iommu/arm-smmu: Make use of phandle iterators in device-tree parsing

 drivers/iommu/arm-smmu.c |  28 +++++--
 drivers/of/base.c        | 206 ++++++++++++++++++++++++++++++-----------------
 include/linux/of.h       |  56 +++++++++++++
 3 files changed, 211 insertions(+), 79 deletions(-)

-- 
1.9.1