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From: Greg KH <gregkh@suse.de>
To: Keith Packard <keithp@keithp.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] usb/serial/cp2101: Add support for cp2103 GPIO pins
Date: Thu, 27 Nov 2008 10:41:09 -0800	[thread overview]
Message-ID: <20081127184109.GA20479@suse.de> (raw)
In-Reply-To: <1227810026.4277.48.camel@aiko.keithp.com>

On Thu, Nov 27, 2008 at 10:20:26AM -0800, Keith Packard wrote:
> On Thu, 2008-11-27 at 10:58 +0000, Alan Cox wrote:
> 
> > Only concern I have is that a custom ioctl means every time a new serial
> > chip grows GPIO pins we end up with more ioctls.
> 
> I'm not sure we'll find a lot of serial chips with GPIO pins attached...

Yes, there are a number of other ones already in use that have them.
What we have done in the past for them is just use a simple userspace
program/library that uses usbfs/libusb to access the device directly.

Can you do the same thing here as well?  Or do you also need to
send/recieve serial data through the device at the same time?

thanks,

greg k-h

  reply	other threads:[~2008-11-27 18:44 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-27  8:29 [PATCH] usb/serial: Add compat_ioctl pass-through Keith Packard
2008-11-27  8:29 ` [PATCH] usb/serial/cp2101: Add support for cp2103 GPIO pins Keith Packard
2008-11-27 10:58   ` Alan Cox
2008-11-27 18:20     ` Keith Packard
2008-11-27 18:41       ` Greg KH [this message]
2008-11-28  1:31         ` Keith Packard
2008-12-03  7:12           ` Greg KH
2008-12-03  8:11             ` Keith Packard
2008-11-27 14:31 ` [PATCH] usb/serial: Add compat_ioctl pass-through Arnd Bergmann
2008-11-27 18:27   ` Keith Packard
2008-11-28 11:43     ` Arnd Bergmann
2008-11-28 14:03       ` Alan Cox
2008-11-28 15:42         ` Arnd Bergmann
2008-11-28 22:28           ` Keith Packard
2008-11-28 22:33             ` Alan Cox
2008-11-29  1:02               ` Keith Packard
2008-11-29  1:10                 ` Alan Cox
2008-11-29  1:23                   ` Arjan van de Ven
2008-11-29  1:37                     ` Alan Cox

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