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

[Brian Buhrow <buhrow%nfbcal.org@localhost>]

Would you be willing to share those local patches? 
-thanks
-Brian


sent on the hoof

> On Dec 14, 2016, at 7:51 AM, Jonathan A. Kollasch <jakllsch%kollasch.net@localhost> wrote:
> 
>> 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