linux-kernel - Re: [PATCH v7 4/5] iio: trigger: Introduce IIO hrtimer based trigger

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Date:	Mon, 31 Aug 2015 16:57:09 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Vladimir Barinov <vladimir.barinov@...entembedded.com>,
	Daniel Baluta <daniel.baluta@...el.com>, jic23@...nel.org,
	jlbec@...lplan.org, linux-iio@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
CC:	knaack.h@....de, linux-kernel@...r.kernel.org,
	octavian.purdila@...el.com, pebolle@...cali.nl,
	patrick.porlan@...el.com, adriana.reus@...el.com,
	constantin.musca@...el.com, marten@...uitiveaerial.com,
	cristina.opriceana@...il.com, pmeerw@...erw.net, hch@....de,
	viro@...iv.linux.org.uk, akpm@...ux-foundation.org
Subject: Re: [PATCH v7 4/5] iio: trigger: Introduce IIO hrtimer based trigger

On 08/17/2015 02:45 PM, Vladimir Barinov wrote:
> Hello Daniel,
> 
> I've verified that your hrtimer trigger works.
> 
> I have minor suggestions.
> 
> Will not it be useful to have ability to stop/start hrtimer polling
> not only during attach/detach trigger.
> 
> f.e. writing 0 to sampling_frequency will hrtimer_cancel
> and writing any valid frequency will hrtimer_start.

What's the use case for this?
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