linux-kernel - Re: [PATCH v3 0/6] IIO pulse capture support for TI ECAP

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Date:	Wed, 05 Feb 2014 23:23:25 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Matt Porter <mporter@...aro.org>,
	Jonathan Cameron <jic23@...nel.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <robh+dt@...nel.org>,
	Benoît Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Thierry Reding <thierry.reding@...il.com>
CC:	Devicetree List <devicetree@...r.kernel.org>,
	Linux PWM List <linux-pwm@...r.kernel.org>,
	Linux IIO List <linux-iio@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 0/6] IIO pulse capture support for TI ECAP

Hello.

On 02/05/2014 10:01 PM, Matt Porter wrote:

[...]

> This series adds support for PWM capture devices within IIO and
> adds a TI ECAP IIO driver.

> PWM capture devices are supported using a new IIO "pulse" channel type.

> The IIO ECAP driver implements interrupt driven triggered buffer capture
> only as raw sample reads are not applicable to this hardware.
> Initially, the driver supports a single pulse width measurement with
> configurable polarity. The ECAP hardware can support measurement of a
> complete period and duty cycle but this is not yet implemented.

    How about pulse counting? I have the hardware that can also count pulses 
in addition to measuring the periods, so I'm interested in this work 
(initially I supported it in driver/misc/ but it got turned down for iio).

WBR, Sergei

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