linux-kernel - Re: [PATCH v6 17/39] platform: add video-multiplexer subdevice driver

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Message-ID: <20170418090505.GA25414@amd>
Date:   Tue, 18 Apr 2017 11:05:05 +0200
From:   Pavel Machek <pavel@....cz>
To:     Philipp Zabel <p.zabel@...gutronix.de>
Cc:     Sakari Ailus <sakari.ailus@....fi>,
        Steve Longerbeam <slongerbeam@...il.com>, robh+dt@...nel.org,
        mark.rutland@....com, shawnguo@...nel.org, kernel@...gutronix.de,
        fabio.estevam@....com, linux@...linux.org.uk, mchehab@...nel.org,
        hverkuil@...all.nl, nick@...anahar.org, markus.heiser@...marIT.de,
        laurent.pinchart+renesas@...asonboard.com, bparrot@...com,
        geert@...ux-m68k.org, arnd@...db.de, sudipm.mukherjee@...il.com,
        minghsiu.tsai@...iatek.com, tiffany.lin@...iatek.com,
        jean-christophe.trotin@...com, horms+renesas@...ge.net.au,
        niklas.soderlund+renesas@...natech.se, robert.jarzmik@...e.fr,
        songjun.wu@...rochip.com, andrew-ct.chen@...iatek.com,
        gregkh@...uxfoundation.org, shuah@...nel.org,
        sakari.ailus@...ux.intel.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: Re: [PATCH v6 17/39] platform: add video-multiplexer subdevice driver

Hi!

> That self-referencing mux-controls property looks a bit superfluous:
> 
> 	mux: video-multiplexer {
> 		mux-controls = <&mux>;
> 	};
> 
> Other than that, I'm completely fine with splitting the compatible into
> something like video-mux-gpio and video-mux-mmio and reusing the
> mux-gpios property for video-mux-gpio.

Agreed, I overseen that.

> > You should be able to use code in drivers/mux as a library...
> 
> This is a good idea in principle, but this requires some rework of the
> mux subsystem, and that subsystem hasn't even landed yet. For now I'd
> like to focus on getting the DT bindings right.
> 
> I'd honestly prefer to not add this rework as a requirement for the i.MX
> media drivers to get into staging.

Hmm. staging/ normally accepts code with bigger design problems than
that.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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