linux-kernel - Re: [PATCH v2 4/4] da850-evm: add baseboard UI expander buttons, switches and LEDs

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Date:	Fri, 19 Nov 2010 12:15:32 -0500
From:	Ben Gardiner <bengardiner@...ometrics.ca>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	"Nori, Sekhar" <nsekhar@...com>,
	Kevin Hilman <khilman@...prootsystems.com>,
	"davinci-linux-open-source@...ux.davincidsp.com" 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	"Govindarajan, Sriramakrishnan" <srk@...com>,
	Paul Mundt <lethal@...ux-sh.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Alexander Clouter <alex@...riz.org.uk>,
	Chris Cordahi <christophercordahi@...ometrics.ca>
Subject: Re: [PATCH v2 4/4] da850-evm: add baseboard UI expander buttons,
 switches and LEDs

Hi Dmitry,

On Fri, Nov 19, 2010 at 12:02 PM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
> Another question is why do you want to poll the same device at
> different intervals? The processor is already woken up so it makes sense
> to do as much as possible instead of going to sleep. In your case
> 200/700 for every 1400ms interval you wake an extra time to poll
> switches so unless polling switches takes very long time it is better to
> combine them together (and into one input device, probably).

I see. That is a good question :)

I didn't realize that splitting into two separate input devices with
different polling intervals would have the opposite effect than what I
intended. Thank you for pointing this out. I will definitely integrate
them into one input device polled at 200ms.

Best Regards,
Ben Gardiner

---
Nanometrics Inc.
http://www.nanometrics.ca
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