linux-kernel - RE: [PATCH] input: touchscreen: use polling mode in 88pm860x

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Date:	Mon, 14 Mar 2011 05:41:35 -0700
From:	Haojian Zhuang <hzhuang1@...vell.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	"johnpol@....mipt.ru" <johnpol@....mipt.ru>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"a.zummo@...ertech.it" <a.zummo@...ertech.it>,
	"lrg@...mlogic.co.uk" <lrg@...mlogic.co.uk>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] input: touchscreen: use polling mode in 88pm860x



>-----Original Message-----
>From: Dmitry Torokhov [mailto:dmitry.torokhov@...il.com]
>Sent: 2011年3月13日 2:44 PM
>To: Haojian Zhuang
>Cc: johnpol@....mipt.ru; sameo@...ux.intel.com; a.zummo@...ertech.it;
>lrg@...mlogic.co.uk; broonie@...nsource.wolfsonmicro.com;
>rpurdie@...ys.net; linux-kernel@...r.kernel.org
>Subject: Re: [PATCH] input: touchscreen: use polling mode in 88pm860x
>
>On Mon, Mar 07, 2011 at 11:43:14PM +0800, Haojian Zhuang wrote:
>> Measuring point on touchscreen with IRQ mode can only monitor pen-down
>> event. If finger is moving on touchscreen, it can't be monitored by
>> IRQ pen-down event. So switch to polling mode after pen-down event.
>>
>
>Instead of scheduling work you could stay in the interrupt handler
>(which is a separate thread) and poll from it. Or is it a nested
>interrupt and it is sharing the interrupt thread?
>
>Thanks.
>
>--
>Dmitry

I'm using a nested interrupt. Do you mean that I should keep polling in the nested interrupt handler?

Thanks
Haojian