Re: RESEND: Generating interrupts from a USB device driver?

[Daniel Santos]

On 09/02/2013 06:07 PM, Greg KH wrote:
> On Mon, Sep 02, 2013 at 05:46:58PM -0500, Daniel Santos wrote:
> > Hello guys.  I didn't get a response the last time so hopefully with
> > 3.11 out I'll get one this time.
> >
> > I need to be able to generate interrupts from a USB device driver while
> > servicing the complete() function of an interrupt URB.
> No you don't :)
>
> > While I realize that this may seem strange, the purpose is for a USB
> > to SPI/GPIO bridge chip (the MCP2210). When something happens on the
> > remote device where a chip is expecting it's interrupt out pin to
> > trigger an interrupt on some local (to the board) microcontroller, the
> > MCP2210 instead receives that signal and communicates it to the host
> > the next time it's queried. This is the interrupt that I need to, in
> > effect propagate locally. Since my spi_master and gpio_chip are all
> > functioning now, this is the last step to get one of my spi protocol
> > drivers working correctly.
> Just pass the data up the spi stack in your interrupt endpoint handler.
> No need to try to create a "real" interrupt.  There are other USB SPI
> drivers that should give you the idea of how to do it.
Thanks for your response! I haven't been able to find these drivers, can 
you please point me to one? I guess I don't know the "spi stack" well 
enough to know how to propagate that notification up to the driver for 
the spi device (let alone that it was called a "stack" :)

Thanks!!
Daniel
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