Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753687Ab1COFCS (ORCPT ); Tue, 15 Mar 2011 01:02:18 -0400 Received: from mail-gx0-f174.google.com ([209.85.161.174]:37727 "EHLO mail-gx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751540Ab1COFCN (ORCPT ); Tue, 15 Mar 2011 01:02:13 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:content-transfer-encoding :in-reply-to:user-agent; b=eaX09YYEJ5faIwnPRo1fnPTFi0fYGYxm2Zxh/gBaJd+S81090QAXM/DejIZ0vi6c4Y Go0ih9U7N89/gXrVFSCqbsPsspbSBMAm0K4xpXq3BvqSewgfOjz8T1GlVKtKvGw5n+zB rlC0qMaudc0jfdLfShq6GEHz57AfJNB4Bt0ME= Date: Mon, 14 Mar 2011 22:02:06 -0700 From: Dmitry Torokhov To: Haojian Zhuang Cc: "johnpol@2ka.mipt.ru" , "sameo@linux.intel.com" , "a.zummo@towertech.it" , "lrg@slimlogic.co.uk" , "broonie@opensource.wolfsonmicro.com" , "rpurdie@rpsys.net" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] input: touchscreen: use polling mode in 88pm860x Message-ID: <20110315050206.GC1046@core.coreip.homeip.net> References: <1299512600-29047-1-git-send-email-haojian.zhuang@marvell.com> <1299512600-29047-2-git-send-email-haojian.zhuang@marvell.com> <1299512600-29047-3-git-send-email-haojian.zhuang@marvell.com> <1299512600-29047-4-git-send-email-haojian.zhuang@marvell.com> <1299512600-29047-5-git-send-email-haojian.zhuang@marvell.com> <1299512600-29047-6-git-send-email-haojian.zhuang@marvell.com> <20110313064426.GG31566@core.coreip.homeip.net> <25B60CDC2F704E4E9D88FFD52780CB4C05CEAFFB99@SC-VEXCH1.marvell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <25B60CDC2F704E4E9D88FFD52780CB4C05CEAFFB99@SC-VEXCH1.marvell.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1534 Lines: 43 On Mon, Mar 14, 2011 at 05:41:35AM -0700, Haojian Zhuang wrote: > > > >-----Original Message----- > >From: Dmitry Torokhov [mailto:dmitry.torokhov@gmail.com] > >Sent: 2011年3月13日 2:44 PM > >To: Haojian Zhuang > >Cc: johnpol@2ka.mipt.ru; sameo@linux.intel.com; a.zummo@towertech.it; > >lrg@slimlogic.co.uk; broonie@opensource.wolfsonmicro.com; > >rpurdie@rpsys.net; linux-kernel@vger.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? > No, I do not believe you can poll from the nested handler since I believe it shares the thread with other interrupts. In non-nested case you could though. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/