On Wednesday, July 15, 2015 at 05:59:46 PM, Brian Norris wrote: > Hi Michal, Hi all, > On Wed, Jul 15, 2015 at 01:52:27PM +0200, Marek Vasut wrote: > > The problem is, if you add a new DT binding, you'd have to support it > > forever, no matter how bad idea that binding turned out to be. > > Agreed, and a solid NAK to this patch. I could have sworn I gave such a > response when this was originally being discussed a month ago. > > AFAICT, you have one of two general approaches available to you: > > 1. Fix up the SPI driver so that it knows how to break large SPI > transfers up into smaller segments that its constituent hardware (DMA > controllers, fast clocks, etc.) can handle. I think this might actually be easier -- just do a transfer where you don't toggle CS and just stops the clock at the last bit, then do another (multiple) transfers which don't toggle CS at all, then finally do a transfer which toggles a CS at the end. This should be pretty trivial to do and I think for example spi-mxs.c does this. Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
