linux-kernel - Re: [PATCH] usb/serial/cp2101: Add support for cp2103 GPIO pins

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20081203071225.GC12582@suse.de>
Date:	Tue, 2 Dec 2008 23:12:25 -0800
From:	Greg KH <gregkh@...e.de>
To:	Keith Packard <keithp@...thp.com>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb/serial/cp2101: Add support for cp2103 GPIO pins

On Thu, Nov 27, 2008 at 05:31:43PM -0800, Keith Packard wrote:
> On Thu, 2008-11-27 at 10:41 -0800, Greg KH wrote:
> 
> > 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?
> 
> I was hoping to use both at the same time; the target device has a
> serial port that I'll need to get working eventually.

Ick.  Ok, care to come up with some kind of hook into the gpio subsystem
of the kernel so we don't create a new user/kernel interface for
something that we already support?

> Besides, libusb scares me, but if that's the officially supported
> mechanism, I can manage; I don't need it to go fast for this
> application.

libusb can be very fast.  The new version handles multiple urbs in
flight, and threaded applications very easily.  You might want to take a
look at it again if it has been a while.

thanks,

greg k-h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/