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From: "David H. Lynch Jr." <dhlii@dlasys.net>
To: monstr@seznam.cz
Cc: Grant Likely <grant.likely@secretlab.ca>,
	John Williams <john.williams@petalogix.com>,
	Josh Boyer <jwboyer@linux.vnet.ibm.com>,
	linux-serial@vger.kernel.org, jacmet@sunsite.dk,
	Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Subject: Re: Uartlite driver & CONFIG_CONSOLE_POLL
Date: Thu, 15 May 2008 10:45:36 -0400	[thread overview]
Message-ID: <482C4C90.8060606@dlasys.net> (raw)
In-Reply-To: <4827E073.9020301@seznam.cz>

    One of the key differences between my uartlite driver and Peter's
is that like many other serial drivers I have a timer to support irqless
use. Just like Peter has UartLite Like devices with 16bit datapaths,
I have UartLites with no interrupts.

   I have tried (unsuccessfully) several times to migrate my timer
code into Peter's driver. This is probably the most fundimental
remaining reason I can not use Peter's driver.

    More recently I noticed a CONFIG_CONSOLE_POLL option show
up. There are remarks that this is similar to NETPOLL - though
it seems to be implimented using a getc and putc rather than a
poll entry.

    Is this a general serial facility, rather than just for consoles ?
    If I create the polled getc/putc routines can I expect a serial driver
to be functional without having to implement  my own  timer based
polling ?
   
    Is this the proper way to do this ?





-- 
Dave Lynch 					  	    DLA Systems
Software Development:  				         Embedded Linux
717.627.3770 	       dhlii@dlasys.net 	  http://www.dlasys.net
fax: 1.253.369.9244 			           Cell: 1.717.587.7774
Over 25 years' experience in platforms, languages, and technologies too numerous to list.

"Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction."
Albert Einstein


  parent reply	other threads:[~2008-05-15 14:52 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-05-11 14:01 Uartlite driver Michal Simek
2008-05-11 22:39 ` John Williams
2008-05-12  4:31   ` Grant Likely
2008-05-12  6:15     ` Michal Simek
2008-05-15 14:31       ` David H. Lynch Jr.
2008-05-15 16:39         ` Stephen Neuendorffer
2008-05-16  7:41         ` Peter Korsgaard
2008-05-15 14:45       ` David H. Lynch Jr. [this message]
2008-05-16  7:47         ` Uartlite driver & CONFIG_CONSOLE_POLL Peter Korsgaard
     [not found]           ` <482E5BD0.1080306@dlasys.net>
2008-05-18 19:04             ` Peter Korsgaard
2008-05-12  7:43   ` Uartlite driver Peter Korsgaard

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