From: Alberto Panizzo <maramaopercheseimorto@gmail.com> To: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: H Hartley Sweeten <hartleys@visionengravers.com>, linux-input@vger.kernel.org, linux-kernel <linux-kernel@vger.kernel.org>, linux-arm-kernel-infradead <linux-arm-kernel@lists.infradead.org>, Sascha linux-arm <s.hauer@pengutronix.de> Subject: Re: [PATCH v2] input: MXC: add mxc-keypad driver to support the Keypad Port present in the mxc application processors family. Date: Tue, 26 Jan 2010 11:29:01 +0100 [thread overview] Message-ID: <1264501741.5260.29.camel@realization> (raw) In-Reply-To: <20100126095217.GC3480@core.coreip.homeip.net> Hi Dmitry! Thanks for reviewing! On mar, 2010-01-26 at 01:52 -0800, Dmitry Torokhov wrote: > > This algorithm is done via a threaded management of the keypad interrupt source > > and delayed by a proper (and longer) debounce interval controlled by the > > platform initialization. > > This I am not so sure about - the core of the matrix scan routine does > not sleep so I wonder if starting a separate thread is not too wasteful > in this case - you can easily do whan you want with a timer, no? I'm pretty new to kernel programming and, from the university, the threaded way looked the better (and unique) for me.. Let me find some documentation on timers and I will restructure the interrupt management. Yes I need only to delay the matrix-scan activity without waste cpu time. > > > + > > + /* > > + * Search for rows and cols enabled > > + */ > > + keymap_data = (struct matrix_keymap_data *) pdata->keymap_data; > > Why do you need to cast away constness instead of declaring keymap_data > as const pointer? In next version will be fixed. Alberto!
WARNING: multiple messages have this Message-ID (diff)
From: maramaopercheseimorto@gmail.com (Alberto Panizzo) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2] input: MXC: add mxc-keypad driver to support the Keypad Port present in the mxc application processors family. Date: Tue, 26 Jan 2010 11:29:01 +0100 [thread overview] Message-ID: <1264501741.5260.29.camel@realization> (raw) In-Reply-To: <20100126095217.GC3480@core.coreip.homeip.net> Hi Dmitry! Thanks for reviewing! On mar, 2010-01-26 at 01:52 -0800, Dmitry Torokhov wrote: > > This algorithm is done via a threaded management of the keypad interrupt source > > and delayed by a proper (and longer) debounce interval controlled by the > > platform initialization. > > This I am not so sure about - the core of the matrix scan routine does > not sleep so I wonder if starting a separate thread is not too wasteful > in this case - you can easily do whan you want with a timer, no? I'm pretty new to kernel programming and, from the university, the threaded way looked the better (and unique) for me.. Let me find some documentation on timers and I will restructure the interrupt management. Yes I need only to delay the matrix-scan activity without waste cpu time. > > > + > > + /* > > + * Search for rows and cols enabled > > + */ > > + keymap_data = (struct matrix_keymap_data *) pdata->keymap_data; > > Why do you need to cast away constness instead of declaring keymap_data > as const pointer? In next version will be fixed. Alberto!
next prev parent reply other threads:[~2010-01-26 10:29 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-01-08 18:58 MXC: input: add mxc-keypad driver to support the keypad interface present in the mxc application processors family Alberto Panizzo 2010-01-08 18:58 ` Alberto Panizzo 2010-01-08 20:33 ` H Hartley Sweeten 2010-01-08 20:33 ` H Hartley Sweeten 2010-01-08 20:33 ` H Hartley Sweeten 2010-01-16 17:48 ` [PATCH v2] input: MXC: add mxc-keypad driver to support the Keypad Port " Alberto Panizzo 2010-01-16 17:48 ` Alberto Panizzo 2010-01-21 16:17 ` Alberto Panizzo 2010-01-21 16:17 ` Alberto Panizzo 2010-01-23 10:46 ` Alberto Panizzo 2010-01-23 10:46 ` Alberto Panizzo 2010-01-23 10:46 ` Alberto Panizzo 2010-01-26 9:52 ` Dmitry Torokhov 2010-01-26 9:52 ` Dmitry Torokhov 2010-01-26 10:29 ` Alberto Panizzo [this message] 2010-01-26 10:29 ` Alberto Panizzo
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