linux-kernel - Re: [PATCH] add new NRP power meter USB device driver

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Date:	Thu, 31 May 2012 12:17:11 +0200
From:	Oliver Neukum <oneukum@...e.de>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Stefani Seibold <stefani@...bold.net>,
	linux-kernel@...r.kernel.org,
	thomas.braunstorfinger@...de-schwarz.com
Subject: Re: [PATCH] add new NRP power meter USB device driver

Am Donnerstag, 31. Mai 2012, 11:53:04 schrieb Greg KH:
> > So it is a chicken and egg problem. A lot of software is now out with
> > depends on this driver and a lot of embedded development environments
> > doesn't provide libudev, libsysfs und libusb. It will also increase the
> > size of the image and adds additional dependencies to the application.
> 
> You don't need any of those libraries to do this.  What's wrong with
> using "raw" usbfs interactions?

SPI is not limited to USB. If we can get a unified subsystem then the
drivers need to be in kernel space, as some hardware does not allow
a solution in user space.

	Regards
		Oliver
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