Re: Using SPI devices from userspace on the RPI, or from anything NetBSD for that matter?

["Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>]

On Tue, Dec 13, 2016 at 10:42:26PM -0800, Brian Buhrow wrote:
> 	hello.  I'm working on a project where I think I'll be wanting to talk
> to an SPI connected LCD or LED display on an Rasberry Pi.  What I envision
> doing with it shouldn't require a kernel level driver given the fact that
> we already have the SPI(4) framework.  My question is, how can a user-space
> program  read from or write to  a SPI connected peripheral?  I've found the
> gpioctl(8) program and gpio( devices for talking to GPIO connected devices,
> but I don't see how to speak to SPI connected things.  Can anyone enlighten
> me?  I realize I may be asking a very elementary question, but my
> documentation searches haven't revealed what I want for NetBSD.  I've found
> such documents for Linux, but I'd really like to use NetBSD for this
> project.
> 
> Any thoughts would be greatly appreciated.
> -thanks
> -Brian
> 

spi(4) does not currently expose access to userland.  I've got local
patches that do however..

	Jonathan Kollasch