[Xenomai-help] Standard API for RTDM SPI driver

[Xenomai-help] Standard API for RTDM SPI driver

[Sherk Chung]

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Hi folks, after a fruitless search for a real-time SPI driver we are
considering having one developed.  It looks like there is a Xenomai RTDM
API for serial and CAN, but not for SPI.  Would it make sense to try to
come up with an RTDM API for SPI before we kick off the driver
development so that anything we build will conform to some standard.
Any suggestions on what a SPI RTDM API should look like?

 

-Sherk


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Re: [Xenomai-help] Standard API for RTDM SPI driver

[Jan Kiszka]

Sherk Chung wrote:
> Hi folks, after a fruitless search for a real-time SPI driver we are
> considering having one developed.  It looks like there is a Xenomai RTDM
> API for serial and CAN, but not for SPI.  Would it make sense to try to
> come up with an RTDM API for SPI before we kick off the driver
> development so that anything we build will conform to some standard.
> Any suggestions on what a SPI RTDM API should look like?
> 

Check the mailing list archive, there was once some SPI driver announced
for the BFIN 537 [1]. I do not recall much details, but I could imagine
that this is a quite good starting point.

In any case, feel free to discuss your interface design here as well as
post early prototypes.

Jan

[1] http://thread.gmane.org/gmane.linux.real-time.xenomai.devel/3451

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux

Re: [Xenomai-help] Standard API for RTDM SPI driver

[Gilles Chanteperdrix]

Sherk Chung wrote:
> Hi folks, after a fruitless search for a real-time SPI driver we are
> considering having one developed.  It looks like there is a Xenomai RTDM
> API for serial and CAN, but not for SPI.  Would it make sense to try to
> come up with an RTDM API for SPI before we kick off the driver
> development so that anything we build will conform to some standard. 
> Any suggestions on what a SPI RTDM API should look like?

>From my point of view, we need two APIs: the first in kernel-space, to
be used by device drivers which want to use SPI, which will probably
look a lot like Linux SPI API.

Another for applications using RTDM, which will be an RTDM device
profile, or socket protocol. This named device or socket protocol
implementation will be generic, and simply use the kernel-space API.

But I think you should propose the APIs, so that we do not discuss in
the void.

-- 
					    Gilles.