linux-kernel - Re: [PATCH v4 0/7] mux controller abstraction and iio/i2c muxes

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Date:   Sat, 26 Nov 2016 19:38:09 +0100
From:   Peter Rosin <peda@...ntia.se>
To:     <linux-kernel@...r.kernel.org>
CC:     Wolfram Sang <wsa@...-dreams.de>, Rob Herring <robh+dt@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>,
        Jonathan Cameron <jic23@...nel.org>,
        "Hartmut Knaack" <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        "Peter Meerwald-Stadler" <pmeerw@...erw.net>,
        Jonathan Corbet <corbet@....net>,
        "Arnd Bergmann" <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-iio@...r.kernel.org>, <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v4 0/7] mux controller abstraction and iio/i2c muxes

On 2016-11-24 16:18, Peter Rosin wrote:
> v3 -> v4 changes
> - added support for having the mux-controller in a child node of a
>   mux-consumer if it is a sole consumer, to hopefully even further satisfy
>   the complaint from Rob (and later Lars-Peter) about dt complexity.
> - the above came at the cost of some rather horrible refcounting code,
>   please review and suggest how it should be done...
> 
> v2 -> v3 changes
> - have the mux-controller in the parent node of any mux-controller consumer,
>   to hopefully satisfy complaint from Rob about dt complexity.

I did some further tests and both of these attempts to support fancier
devicetree bindings have severe problems. I will remove them for v5 and
go back to having a phandle reference to the mux-controller from the
consumer (unless I get some revelation of course and just get it). I'm
simply not yet understanding the driver model well enough to pull this
off at the moment...

Cheers,
Peter