Messages in this thread | | | Date | Mon, 2 Sep 2013 16:07:38 -0700 | From | Greg KH <> | Subject | Re: RESEND: Generating interrupts from a USB device driver? |
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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,
greg k-h
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