[Letux-kernel] [PATCH v2 02/10] iio: document bindings for mounting matrices

Jonathan Cameron jic23 at kernel.org
Sun Jul 28 09:50:10 CEST 2019

On Tue, 23 Jul 2019 11:46:49 +0200
"H. Nikolaus Schaller" <hns at goldelico.com> wrote:

> Hi Linus,
> > Am 23.07.2019 um 09:42 schrieb Linus Walleij <linus.walleij at linaro.org>:
> > 
> > Hi H. Nikolaus,
> > 
> > On Thu, Feb 21, 2019 at 6:03 PM H. Nikolaus Schaller <hns at goldelico.com> wrote:
> >   
> >> From: Linus Walleij <linus.walleij at linaro.org>  
> > 
> > It is fair for you to change authorship to yourself at this point.
> > Just keeping my Signed-off-by is sufficient.  
> Well, I think my contribution is less than yours :)
> >   
> >> The mounting matrix for sensors was introduced in
> >> commit dfc57732ad38 ("iio:core: mounting matrix support")
> >> 
> >> However the device tree bindings are very terse and since this is
> >> a widely applicable property, we need a proper binding for it
> >> that the other bindings can reference. This will also be useful
> >> for other operating systems and sensor engineering at large.
> >> 
> >> I think all 3D sensors should support it, the current situation
> >> is probably that the mounting information is confined in magic
> >> userspace components rather than using the mounting matrix, which
> >> is not good for portability and reuse.
> >> 
> >> Cc: Linus Walleij <linus.walleij at linaro.org>
> >> Cc: Gregor Boirie <gregor.boirie at parrot.com>
> >> Cc: Sebastian Reichel <sre at kernel.org>
> >> Cc: Samu Onkalo <samu.onkalo at intel.com>
> >> Cc: devicetree at vger.kernel.org
> >> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
> >> Signed-off-by: H. Nikolaus Schaller <hns at goldelico.com>  
> > 
> > Did this patch fall off somewhere? I think it's really neat, even in this
> > form it is great help for developers. If you want I can try picking up the
> > comments and resend it.  
> Well, I had planned to review it again and promised to send out a new
> version. But as usual this ToDo becomes hidden by always more important
> tasks.
> So I am fine if you can pick comments and resend it. I think there will
> be others who help to make it even better in the future if the mount matrix
> is more widely used.
> BR,
> Nikolaus
Given the comments that 'need' any response are fairly minor, I've just
taken the view that the perfect is the enemy of the good and applied
it to the togreg branch of iio.git with some really small tweaks.

Thanks for offering to tidy this up Linus, but seems like it would be
a waste of your time for such trivial tweaks!

The only one outstanding that I haven't 'fixed' is the question I raised
on face down or face up when talking about flat on the ground.

That might want a clarifying comment.

Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with it (or not as the case may be!)



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