Messages in this thread | | | Date | Mon, 02 Sep 2013 20:40:47 -0500 | From | Daniel Santos <> | Subject | Re: RESEND: Generating interrupts from a USB device driver? |
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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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