linux-kernel - Re: [PATCH V2 2/2] staging: Documentation: add proximity_sampling

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Message-ID: <4F86A7DE.5040203@cam.ac.uk>
Date:	Thu, 12 Apr 2012 11:01:02 +0100
From:	Jonathan Cameron <jic23@....ac.uk>
To:	Laxman Dewangan <ldewangan@...dia.com>
CC:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"jbrenner@...sinc.com" <jbrenner@...sinc.com>,
	Rhyland Klein <rklein@...dia.com>, "max@...o.at" <max@...o.at>,
	"linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
	"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>
Subject: Re: [PATCH V2 2/2] staging: Documentation: add proximity_sampling_period
 as sysfs details

On 4/12/2012 10:48 AM, Laxman Dewangan wrote:
> On Thursday 12 April 2012 03:07 PM, Jonathan Cameron wrote:
>> On 4/12/2012 8:08 AM, Laxman Dewangan wrote:
>>> +What:        /sys/bus/iio/devices/device[n]/proximity_sampling_period
>>> +KernelVersion:    3.5
>>> +Contact:    linux-iio@...r.kernel.org
>>> +Description:
>>> +        Hardware dependent mode for proximity sensor device to set/get
>>> +        the sampling rate of proximity sensing and conversion.
>> Ah, that explains what it is.  Sorry, use
>> in_proximitiy0_sampling_frequency to provide equivalent
>> control please.  Might be a pain here, but this interface will just
>> provide the same info as the existing
>> one in a different form.  Note that sampling_frequency is documented as
>> a general one, but can
>> be extended to individual channels.
>>
>
> Ooop, I did not realize that it is there as part of sysfs.h. I was 
> looking for other header to get
> support for this. I can use this for proximity only but I think I 
> should go with you other
> suggestion to implement this on channel basis. This will help also in 
> future for other
> drivers to have different sampling on different channel.
Great!
>> Actually add it to the iio-core as an element in the info_mask as I
>> doubt this will be the last time
>> we see this control. This will need to be a precursor patch to the
>> driver obviously.
>>
>> IIO_CHAN_INFO_SAMP_FREQ and the relevant shared and separate macros need
>> to go in
>> iio.h + the text entry in industrialio-core.c
>>
>> If you like I can do this but it'll be quicker if you do :)
>
> I will send the patch for implementing this first and then modified 
> version of my driver which actually uses this one.
Cool
>
>
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