linux-kernel - Re: [PATCH 0/2] OF phandle nexus support + GPIO nexus

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Date:   Thu, 24 Nov 2016 14:47:03 +0200
From:   Pantelis Antoniou <pantelis.antoniou@...sulko.com>
To:     Stephen Boyd <stephen.boyd@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-gpio@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH 0/2] OF phandle nexus support + GPIO nexus

Hi Stephen,

> On Nov 24, 2016, at 12:25 , Stephen Boyd <stephen.boyd@...aro.org> wrote:
> 
> This is one small chunk of work related to DT overlays for expansion
> boards. It would be good to have a way to expose #<list>-cells types of
> providers through a connector in a standard way. So we introduce a way
> to make "nexus" nodes for these types of properties to remap the consumer
> number space to the other side of the connector's number space. It's
> basically a copy of the interrupt nexus implementation, but without
> the address space matching design and interrupt-parent walking.
> 
> The first patch implements a generic method to do this, and the second patch
> adds a unit test for it. The third patch is more of an example than anything
> else. It shows how we would modify frameworks to use the new API.
> 

Excellent. It was about time this happened.

> Stephen Boyd (3):
>  of: Support parsing phandle argument lists through a nexus node
>  of: unittest: Add phandle remapping test
>  gpio: Support gpio nexus dt bindings
> 
> drivers/gpio/gpiolib-of.c                   |   5 +-
> drivers/of/base.c                           | 146 ++++++++++++++++++++++++++++
> drivers/of/unittest-data/testcases.dts      |  11 +++
> drivers/of/unittest-data/tests-phandle.dtsi |  24 +++++
> drivers/of/unittest.c                       | 124 +++++++++++++++++++++++
> include/linux/of.h                          |  14 +++
> 6 files changed, 322 insertions(+), 2 deletions(-)
> 
> -- 
> 2.10.0.297.gf6727b0
> 

Comments inline…

Regards

— Pantelis