linux-kernel - Re: [PATCH 2/3] spi: of: allow instantiating slaves without a driver

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Message-ID: <20160626172540.GR28202@sirena.org.uk>
Date:	Sun, 26 Jun 2016 18:25:40 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Michal Suchanek <hramrach@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kees Cook <keescook@...omium.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Dan Williams <dan.j.williams@...el.com>,
	Tejun Heo <tj@...nel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Andrey Ryabinin <aryabinin@...tuozzo.com>,
	Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Adrien Schildknecht <adrien+dev@...ischi.me>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-spi <linux-spi@...r.kernel.org>
Subject: Re: [PATCH 2/3] spi: of: allow instantiating slaves without a driver

On Sun, Jun 26, 2016 at 05:19:54PM +0200, Michal Suchanek wrote:
> On 26 June 2016 at 14:57, Mark Brown <broonie@...nel.org> wrote:

> > That would be a binding for the connector which is the big missing bit
> > here - it's not clear that such a limited connector description would be
> > a good idea.

> It would work for a limited number of devices. Anyway, connectors are
> supposed to be transparent so if binding devices has issues now it
> will supposedly have same issues once connectors allow renaming
> several devices at once from board-specific name to connector-specific
> name rather than one at a time as this limited connector binding
> allows.

It's not entirely clear to me that connectors are going to end up
transparent, at least to the host system - there's things like pinmuxing
in there.  They're a definite thing and some work needs to go into
hiding them from the plugin modules, work which might mean that these
dummy nodes don't need to be created.

In any case this series needs a bunch of restructuring, some of it needs
replacing and the whole thing needs to be presented a lot more clearly.

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