linux-kernel - Re: [RFP] iio: Support of gesture sensor as a standard IIO sensor

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Date:   Sat, 20 Jan 2018 15:19:08 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Pavel Machek <pavel@....cz>
Cc:     "Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFP] iio: Support of gesture sensor as a standard IIO sensor

On Thu, 18 Jan 2018 23:40:26 +0100
Pavel Machek <pavel@....cz> wrote:

> Hi!
> 
> > From an IIO sensor point of view A Gesture sensor:
> > Outputs
> > 	A pre defined activity type
> > 		WAKE
> > 		TILT
> > 		GLANCE
> > 		PICK_UP
> > 		 &
> > 		 more
> > 
> > 	A user defined activity type as "string"  
> 
> Pre-defined activities are easy.
> 
> But what about user-defined activities? We'd really like common
> interface across different hardware... 

Nasty to handle indeed.   It may be the best we can do initially
at least is user_definedN or similar.  No way of constraining
users from uploading something really odd that we can't define
an interface for (hopping whilst holding a phone in
their teeth?)
> 
> > Inputs
> > 	A raw binary cdev interface to download templates/patterns  
> 
> ....and "raw binary" will not work across different hardware :-(.

Sadly there probably isn't much we can do about the format being custom.
Best bet would ultimately be if there was at least a standard tool
to generate the files for different devices...

> 
> 									Pavel