From: Daniel Santos Subject: Re: RESEND: Generating interrupts from a USB device driver? Date: Mon, 02 Sep 2013 20:40:47 -0500 Message-ID: <52253E1F.6000101@att.net> References: <52251562.5000208@att.net> <20130902230738.GA22494@kroah.com> Reply-To: Daniel Santos Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20130902230738.GA22494-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Greg KH Cc: LKML , linux-gpio , linux-usb , linux-spi List-Id: linux-gpio@vger.kernel.org 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 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html